2020-04-28 Tracking News

Contents on 28 April '20

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 114 listings
- New MPECs -- 20 MPECs
Observers -- 65 observers
Impact Risk Monitoring -- twelve objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1130 risk-listed objects, 50 have had news in the last 31 days. Updated at 2001 UTC on 28 April.
Earth's Busy Neighborhood traffic page
Ephemerides for risk-listed objects & close passers
News archive (old) & news image catalog (discontinued)
Object Links - mainly for radar targets & close passers (mostly discontinued)
Observing Campaigns (old)

The latest A/CC news is available via framed access, RSS news feed, or redirection.

Navigation tips: Use the << and >> arrows on the menus for each regular section (Observers, Risks, etc.) to move to the previous and next day's news for that section. Use the Index menu item to access specific days through a calendar interface. To keep track of what's new each day, watch the Chronology section.

Radar Astrometry on 28 April '20

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 1900 UTC when the database was dated 28 April

2020 HJ6 (close passer) from Arecibo (April 28.16 velocity & 28.17 range)

Photometry and some astrometry is needed for upcoming radar targets. See Arecibo and Goldstone schedules.

NEOCP Activity on 28 April '20

The MPC's NEO Confirmation Page has 114 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 114 objects listed. Of these, 79 were "one nighters." So far The Tracking News has counted a total of 150 listings on the NEOCP today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs on 28 April '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 20 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-H202 time-stamped "00:03 UT" - Comet P/2005 JD108 = 2020 H1 (Catalina-NEAT) - see below
MPEC 2020-H203 time-stamped "02:12 UT" - 2020 HK7 - see below
MPEC 2020-H204 time-stamped "02:12 UT" - 2020 HL7 - see below
MPEC 2020-H205 time-stamped "02:13 UT" - 2020 HM7 - see below
MPEC 2020-H206 time-stamped "02:14 UT" - 2020 HN7 - see below
MPEC 2020-H207 time-stamped "02:14 UT" - 2020 HO7 - see below
MPEC 2020-H208 time-stamped "02:15 UT" - 2020 HP7 - see below
MPEC 2020-H209 time-stamped "02:15 UT" - 2020 HQ7 - see below
MPEC 2020-H210 time-stamped "02:22 UT" - 2020 HR7 - see below
MPEC 2020-H211 time-stamped "12:13 UT" - Daily Orbit Update - see below
MPEC 2020-H212 time-stamped "12:47 UT" - 2020 HS7 - see below
MPEC 2020-H213 time-stamped "13:09 UT" - 2020 HT7 - see below
MPEC 2020-H214 time-stamped "13:12 UT" - 2020 HU7 - see below
MPEC 2020-H215 time-stamped "13:14 UT" - 2020 HV7 - see below
MPEC 2020-H216 time-stamped "13:15 UT" - 2020 HW7 - see below
MPEC 2020-H217 time-stamped "13:18 UT" - 2020 HX7 - see below
MPEC 2020-H218 time-stamped "14:31 UT" - 2020 HA8 - see below
MPEC 2020-H219 time-stamped "14:32 UT" - 2020 HB8 - see below
MPEC 2020-H220 time-stamped "18:57 UT" - Comet C/2020 H2 (Pruyne) - see below
MPEC 2020-H221 time-stamped "22:27 UT" - Comet C/2020 H3 (Wierzchos)

MPEC 2020-H221 - "22:27 UT" - Comet C/2020 H3 (Wierzchos)

CK20H030 C/2020 H3 (Wierzchos) (i=62.5°, q=2.300 AU, TP=2020 June 5.71616 TT) was picked up at 1046 UT on 25 April by the Mt. Lemmon Survey (MLS), observing it at April 25.45-49p6. This detection was confirmed by Steward Obs. Mt. Lemmon Station (April 25.48-49p4, 26.42-43p4, 27.39p3 & 28.40-41p4), B. Lutkenhoner via Slooh.com Canary Islands Obs. (April 26.19-20p2), ESA Optical Ground Station (ESA OGS) (April 26.21p2), Visnjan Obs. (April 27.09p3), Hidetaka Sato via iTelescope Obs. Mayhill (April 27.45p2), KLENOT (April 28.06-07p8), and Lothar Kurtze via Faulkes Telescope North (April 28.55p3).

MPEC 2020-H220 - "18:57 UT" - Comet C/2020 H2 (Pruyne)

CK20H020 C/2020 H2 (Pruyne) (i=125.0°, q=0.834 AU, TP=2020 Apr. 27.62059 TT) was picked up at 1118 UT on 26 April by the Catalina Sky Survey (CSS), observing it at April 26.47-48p3. This detection was confirmed by ATLAS Mauna Loa (April 26.60-62p4), Stixendorf Obs. (April 27.07-10p5), Visnjan Obs. (April 27.10p5), program code "*" (19) via Slooh.com Canary Islands Obs. (April 27.19-21p2), Cordell-Lorenz Obs. (April 27.40-41p4), Telescope Live (April 27.41p2), Sato/iTelObs-Mayhill (April 27.46-47p4), iTelescope Obs. Mayhill (April 27.46-47p2 & 28.44-45p3), program code "#" (12) via iTelescope Obs. Auberry (April 27.48-49p3), Swan Hill Obs. (April 27.79p4), Galati Obs. (April 28.05-06p6), Lutkenhoner/Slooh.com CIO (April 28.21-22p3), and Steward Mt. Lemmon Sta. (April 28.47p2).

MPEC 2020-H219 - "14:32 UT" - 2020 HB8

K20H08B 2020 HB8 (small asteroid, H=24.9 ~35m) was picked up at 0948 UT on 26 April by MLS, observing it at April 26.41-42p4. This detection was confirmed by the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (April 26.46-47p4 at G=21.7-22.4, 27.34-35p4 at G=21.8-22.3 & 28.36-38p4 at G=21.6-22.2).

MPEC 2020-H218 - "14:31 UT" - 2020 HA8

K20H08A 2020 HA8 (small asteroid, H=22.2 ~123m) was picked up at 0616 UT on 27 April by MLS, observing it at April 27.26-28p4. This detection was confirmed by Pan-STARRS 2 (PS2) (April 26.36-39p3), Steward Mt. Lemmon Sta. (April 27.31-32p4 & 28.21-22p4), Pan-STARRS 1 (PS1) (April 27.32-35p3), KLENOT (April 27.88p2), Visnjan Obs. (April 27.92-93p3), and Mt. John Obs. (April 28.42p4).

MPEC 2020-H217 - "13:18 UT" - 2020 HX7

K20H07X 2020 HX7 (small asteroid, H=25.2 ~31m) was picked up at 0642 UT on 27 April by MLS, observing it at April 27.28-30p4. This detection was confirmed by PS2 (April 26.37-38p2), PS1 (April 27.32-35p3), Steward Mt. Lemmon Sta. (April 27.32-33p4 & 28.14-15p3), KLENOT (April 27.88-89p3), Schwarzschild Obs. (April 27.90-91p3), and Mt. John Obs. (April 28.45-46p4).

MPEC 2020-H216 - "13:15 UT" - 2020 HW7

K20H07W 2020 HW7 (risk listed, Earth MOID=1.2 LD, H=27.1 ~13m, close passer) was picked up at 0845 UT on 26 April by PS1, observing it at April 26.36-40p3. This detection was confirmed by Visnjan Obs. (April 26.86p3), Schwarzschild Obs. (April 26.89-90p4), CSS-Kuiper (April 28.21-22p4), and Mt. John Obs. (April 28.48-49p3).

MPEC 2020-H215 - "13:14 UT" - 2020 HV7

K20H07V 2020 HV7 (Earth MOID=1.8 LD, H=27.1 ~13m) was picked up at 1323 UT on 26 April by PS1, observing it at April 26.56-59p3. This detection was confirmed by KLENOT (April 26.93p3), Schwarzschild Obs. (April 26.93p3 & 27.94-95p3), Visnjan Obs. (April 26.95-96p5), Steward Mt. Lemmon Sta. (April 27.36p2 at G=20.9-22.1 & 28.28-29p4 at G=20.9-22.3), and Astronomical Research Obs. Westfield (April 28.32-34p3).

MPEC 2020-H214 - "13:12 UT" - 2020 HU7

K20H07U 2020 HU7 (Earth MOID=0.3 LD, H=29.7 ~4m) was picked up at 1035 UT on 23 April by MLS, observing it at April 23.44-49p5 and 24.43-44p2. This detection was confirmed by Visnjan Obs. (April 24.04-05p4).

MPEC 2020-H213 - "13:09 UT" - 2020 HT7

K20H07T 2020 HT7 (Earth MOID=1.8 LD, H=26.8 ~15m) was picked up at 1328 UT on 27 April by Kiso Obs., observing it at April 27.56p6 and 27.62-68p6. This detection was confirmed by JAXA Space Tracking & Communications Center (JAXA STCC) (April 27.68-69p3), ROASTERR-1 (April 27.80-81p4), Pascoli Obs. (April 27.82p3), Oberfrauendorf Obs. (April 27.83-84p11), QOS Obs. (April 27.83-84p3), Visnjan Obs. (April 27.84p7), KLENOT (April 27.85-86p12), Andrushivka Obs. (April 27.85-86p5), Schwarzschild Obs. (April 27.87p3), Platanus Obs. (April 28.08-09p8), Steward Mt. Lemmon Sta. (April 28.28p4), ARO Westfield (April 28.31p5), and Sato/iTelObs-Mayhill (April 28.43p3).

MPEC 2020-H212 - "12:47 UT" - 2020 HS7

K20H07S 2020 HS7 (Earth MOID=0.0 LD, H=29.16 ~5m) was picked up at 0946 UT on 27 April by PS2, observing it at April 27.41-44p4. This detection was confirmed by Xingming Obs. #3 (April 27.83-84p4), Schwarzschild Obs. (April 27.88p3 & 27.95p3), Visnjan Obs. (April 27.90-91p3), KLENOT (April 28.02-05p26), Squirrel Valley Obs. (April 28.09-12p4), Farpoint Obs. (April 28.19-20p3), and ARO Westfield (April 28.25-26p5).

<< DOU on 28 April '20 >> MPEC 2020-H211 - "12:13 UT" - Daily Orbit Update

Observations of risk-listed objects
K20H07M 2020 HM7 (small asteroid, arc=3 days, H=25.9 ~22m, close passer, NHATS target) from ATLAS Mauna Loa (April 28.41-43p4)
K20H06U 2020 HU6 (Q=5.085 AU, arc=6 days, H=19.4 ~446m) from CSS-Kuiper (April 28.45-46p4)
K20H06M 2020 HM6 (small asteroid, arc=4 days, H=26.7 ~15m, close passer) from Steward Mt. Lemmon Sta. (April 28.23-24p4)
K20H06L 2020 HL6 (small asteroid, arc=9 days, H=28.1 ~8m, close passer, NHATS target) from Steward Mt. Lemmon Sta. (April 28.41-42p4)
K20H06J 2020 HJ6 (small asteroid, Q=4.254 AU, arc=8 days, H=26.7 ~15m, close passer) from KLENOT (April 27.87p6)
K20H05V 2020 HV5 (small asteroid, Q=4.669 AU, arc=6 days, H=25.5 ~27m) from MLS (April 27.30-32p4)
K20H04Q 2020 HQ4 (small asteroid, arc=6 days, H=26.8 ~15m, close passer, NHATS target) from KLENOT (April 27.87p6) and Steward Mt. Lemmon Sta. (April 28.15p3)
K20H04M 2020 HM4 (small asteroid, arc=8 days, H=24.5 ~43m) from MLS (April 27.30-32p4) and Steward Mt. Lemmon Sta. (April 28.33-34p3)
K20H03K 2020 HK3 (small asteroid, arc=9 days, H=24.2 ~49m, close passer) from KLENOT (April 27.84p9) and Steward Mt. Lemmon Sta. (April 28.42-43p4)
K20H01L 2020 HL1 (small asteroid, arc=12 days, H=25.3 ~29m) from iTelescope Obs. Siding Spring (April 27.51-53p2) and Steward Mt. Lemmon Sta. (April 28.31p4)
Observations of close-passing objects
K20H06Y 2020 HY6 (arc=2 days, H=26.9 ~14m) from Steward Mt. Lemmon Sta. (April 28.14p4)
K20H06W 2020 HW6 (arc=3 days, H=26.0 ~21m, NHATS target) from Northolt Branch Obs. (April 26.90-91p6) and Steward Mt. Lemmon Sta. (April 28.32p3)
K20H06P 2020 HP6 (arc=6 days, H=28.0 ~9m) from Northolt Branch Obs. (April 26.92-93p4)
K20H06K 2020 HK6 (arc=9 days, H=27.6 ~10m) from Steward Mt. Lemmon Sta. (April 28.15p4)
K20H06E 2020 HE6 (arc=4 days, H=25.6 ~26m) from Steward Mt. Lemmon Sta. (April 28.24p2)
K20H06C 2020 HC6 (arc=4 days, H=25.1 ~32m, NHATS target) from Steward Mt. Lemmon Sta. (April 28.15p3)
K20H06B 2020 HB6 (arc=4 days, H=24.1 ~51m, NHATS target) from MLS (April 27.30-32p4), CSS (April 27.34-36p4), ATLAS Haleakala (April 27.41-45p4), and Steward Mt. Lemmon Sta. (April 28.36p4)
K20H05N 2020 HN5 (arc=4 days, H=25.0 ~34m) from KLENOT (April 26.85p3)
K20H05A 2020 HA5 (arc=6 days, H=26.7 ~15m, NHATS target) from Steward Mt. Lemmon Sta. (April 28.27-28p4)
K20H04F 2020 HF4 (arc=9 days, H=27.4 ~11m, NHATS target) from PS1 (April 27.48-50p3)
K20H03T 2020 HT3 (arc=7 days, H=25.3 ~29m, NHATS target) from LCO McDonald Obs. (April 24.14-17p7), Pomona College Table Mtn. Obs. (PCTMO) (April 25.36-41p3), the Zwicky Transient Facility (ZTF) (April 27.34-37p4), ATLAS Mauna Loa (April 27.41-42p4), and Steward Mt. Lemmon Sta. (April 28.36-37p4)
K20H02U 2020 HU2 (arc=11 days, H=26.5 ~17m, NHATS target) from CSS (April 27.34-36p3) and Steward Mt. Lemmon Sta. (April 28.42p4)
c8945 388945 2008 TZ3 from Pin Oak Obs. (April 27.09-14p3) and AHS Obs. (April 28.19-20p3)
Observation campaigns (NHATS targets, radar support)
K20H06T 2020 HT6 (arc=6 days, H=24.5 ~43m, NHATS) from CSS-Kuiper (April 28.39-43p3 at G=22.0-22.1)
K20H05G 2020 HG5 (arc=6 days, H=25.7 ~25m, NHATS) from Steward Mt. Lemmon Sta. (April 28.29-30p4 at G=21.3-22.4)
K20H03Q 2020 HQ3 (arc=9 days, H=25.4 ~28m, NHATS) from CSS (April 27.34-36p2), ATLAS Haleakala (April 27.40-42p4), and Steward Mt. Lemmon Sta. (April 28.18p4)
K20H01Y 2020 HY1 (arc=11 days, H=24.3 ~47m, NHATS) from Steward Mt. Lemmon Sta. (April 28.18-19p4 at G=21.3-22.8)
K20H01S 2020 HS1 (arc=11 days, H=25.8 ~23m, NHATS) from Steward Mt. Lemmon Sta. (April 28.37p3 at G=21.7-22.3)
K20F06X 2020 FX6 (arc=30 days, H=22.5 ~107m, NHATS) from CSS-Kuiper (April 28.22-23p4)
K19Y03W 2019 YW3 (arc=125 days, H=22.8 ~93m, NHATS) from PS1 (April 27.47-51p4)
K19T02F 2019 TF2 (NHATS) from PS1 (April 27.59-61p3)
K18E00B 2018 EB (arc=2 opp, H=21.8 ~148m, radar) from CSS-Kuiper (April 28.14-16p4 at G=22.1-23.8)
K09O05S 2009 OS5 (arc=3 opp, H=24.4 ~45m, NHATS) from PS1 (March 23.53-56p4 & 25.46-50p4)
K06F36H 2006 FH36 (arc=3 opp, H=23.1 ~81m, NHATS) from CSS (April 27.26-27p3), Purple Mtn. Obs. Xuyi Station (April 27.60-63p3), and Farpoint Obs. (April 28.16-17p3)
J0166 190166 2005 UP156 (radar) from CSS (April 27.28-30p4), PS2 (April 27.35-39p4), and ATLAS Haleakala (April 27.38-40p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20H07D 2020 HD7 (arc=6 days, H=25.6 ~26m) from PS1 (April 27.41-43p3 at w=22.31-43)
K20H07A 2020 HA7 (arc=9 days, H=22.6 ~102m) from PS1 (April 27.53-57p3)
K20H06S 2020 HS6 (arc=4 days, H=22.3 ~117m) from Steward Mt. Lemmon Sta. (April 28.24-27p4)
K20H06N 2020 HN6 (arc=4 days, H=22.7 ~98m) from PS1 (April 27.37-40p3) and Steward Mt. Lemmon Sta. (April 28.17p4)
K20H06G 2020 HG6 (arc=34 days, H=23.0 ~85m) from PS1 (April 27.37-40p4)
K20H05X 2020 HX5 (arc=6 days, H=22.4 ~112m) from PS1 (April 27.37-41p4)
K20H05U 2020 HU5 (arc=6 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (April 28.24p3)
K20H05T 2020 HT5 (arc=6 days, H=22.9 ~89m) from MLS (April 27.33-34p3) and PS1 (April 27.42-44p3)
K20H05M 2020 HM5 (q=0.329 AU, arc=5 days, H=23.6 ~65m) from Steward Mt. Lemmon Sta. (April 28.16p4)
K20H05B 2020 HB5 (arc=6 days, H=24.0 ~54m) from Steward Mt. Lemmon Sta. (April 28.17-18p4)
K20H04L 2020 HL4 (arc=8 days, H=24.6 ~41m) from Steward Mt. Lemmon Sta. (April 28.24-25p4)
K20H04D 2020 HD4 (arc=12 days, H=24.8 ~37m) from MLS (April 27.33-34p4) and PS1 (April 27.41-44p4)
K20H03Y 2020 HY3 (arc=11 days, H=23.1 ~81m) from Steward Mt. Lemmon Sta. (April 28.22p2)
K20H03W 2020 HW3 (i=45.8°, arc=7 days, H=22.1 ~129m) from Mountainville Obs. (April 27.36-45p4)
K20H03P 2020 HP3 (arc=9 days, H=22.2 ~123m) from CSS-Kuiper (April 28.28-29p4 at G=21.8-22.8)
K20H03L 2020 HL3 (arc=8 days, H=24.0 ~54m) from Steward Mt. Lemmon Sta. (April 28.16p4)
K20H03H 2020 HH3 (arc=8 days, H=23.7 ~62m) from PS1 (April 27.53-55p3)
K20H03E 2020 HE3 (arc=10 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (April 28.32-33p3)
K20H02T 2020 HT2 (arc=37 days, H=22.3 ~117m) from PS2 (April 27.41-44p4)
K20H02M 2020 HM2 (arc=25 days, H=25.6 ~26m) from PS1 (April 27.48-51p3)
K20H02J 2020 HJ2 (arc=9 days, H=24.8 ~37m) from CSS-Kuiper (April 28.43-44p2 at G=21.2-22.4)
K20H02D 2020 HD2 (arc=11 days, H=23.0 ~85m) from CSS-Kuiper (April 28.47p4)
K20H01O 2020 HO1 (arc=10 days, H=27.0 ~13m) from Steward Mt. Lemmon Sta. (April 28.37-39p4)
K20H01C 2020 HC1 (arc=25 days, H=23.2 ~78m) from Steward Mt. Lemmon Sta. (April 28.48p4)
K20H00Y 2020 HY (arc=11 days, H=22.9 ~89m) from Steward Mt. Lemmon Sta. (April 28.19p4)
K20F07A 2020 FA7 (arc=42 days, H=22.3 ~117m) from ATLAS Mauna Loa (April 27.35-40p4)
K20D01N 2020 DN1 (arc=28 days, H=22.7 ~98m) from Steward Mt. Lemmon Sta. (Feb. 19.17p2)
K20B10R 2020 BR10 (arc=39 days, H=22.8 ~93m) from SATINO-1 (Feb. 12.95-98p2)
K19W04V 2019 WV4 (arc=151 days, H=23.4 ~71m) from PS1 (April 27.42-45p3 at w=22.21-23.10)
K19U09C 2019 UC9 (arc=99 days, H=23.7 ~62m) from MLS (2019 Oct. 20.08-09p4)
K17F90Q 2017 FQ90 (arc=2 opp, H=22.2 ~123m) from PS1 (March 19.60-63p4 at G=22.7-23.2 & April 23.48-52p4 at G=22.0-22.9) and PS2 (April 27.45-48p3)
K20H05D 2020 HD5 (arc=6 days, H=21.8 ~148m) from PS2 (April 27.47-49p3) and Steward Mt. Lemmon Sta. (April 28.35p4)
K19W00X 2019 WX (arc=61 days, H=22.0 ~135m) from MLS (2019 Dec. 17.27-29p4)
K18K00P 2018 KP (arc=2 opp, H=22.0 ~135m) from MLS (2018 May 12.30-32p4 & Feb. 2.37-38p4), PS1 (Jan. 23.59-63p4), and the Bok Telescope (Feb. 21.27-31p7)
K17R00V 2017 RV (arc=3 opp, H=21.9 ~141m) from MLS (2019 Dec. 2.35-36p2)
K15Xb7W 2015 XW377 (Q=4.019 AU, arc=2 opp, H=21.8 ~148m) from UH/Tholen NEO Follow-Up 2.24m Telescope (2019 Nov. 28.40-44p4 at G=22.66-96)
Observations of other objects
K20H06V 2020 HV6 (arc=5 days, H=21.6 ~162m) from PS1 (April 27.58-60p3)
K20H05L 2020 HL5 (arc=6 days, H=20.6 ~257m) from PS1 (April 27.53-56p3)
K20H02V 2020 HV2 (Q=4.757 AU, arc=11 days, H=18.9 ~562m) from Steward Mt. Lemmon Sta. (April 28.35-36p4 at G=20.7-22.1)
K20H01W 2020 HW1 (arc=12 days, H=19.2 ~490m) from Steward Mt. Lemmon Sta. (April 28.47-48p4)
K20G03F 2020 GF3 (arc=24 days, H=19.8 ~371m) from ZTF (April 25.29-34p4)
K20G02D 2020 GD2 (arc=177 days, H=20.5 ~269m) from MLS (2019 Nov. 5.32-33p4 & April 27.30-32p4), CSS (April 27.34-36p4), and ATLAS Haleakala (April 27.41-45p4)
K20F06B 2020 FB6 (arc=34 days, H=20.7 ~245m) from Steward Mt. Lemmon Sta. (April 28.47-48p4)
K20D05B 2020 DB5 (arc=59 days, H=19.3 ~467m) from Steward Mt. Lemmon Sta. (April 28.46-47p4)
K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.2 ~490m) from MLS (2007 April 22.44-46p4), PS1 (Jan. 1.51-54p4), ATLAS Haleakala (April 27.39-41p4), and ROASTERR-1 (April 27.82-83p2)
K19V06N 2019 VN6 (arc=110 days, H=18.0 ~851m) from PS2 (Jan. 21.40-42p2)
K19U13X 2019 UX13 (arc=80 days, H=21.3 ~186m) from PS1 (2019 Nov. 9.54-57p3)
K19U11B 2019 UB11 (Q=4.595 AU, arc=172 days, H=20.6 ~257m) from MLS (2019 Sept. 30.19-21p4) and ZTF (2019 Oct. 1.17p1 & 2019 Oct. 1.23-27p3)
K19U10F 2019 UF10 (arc=31 days, H=19.1 ~513m) from PS1 (2019 Oct. 5.52-55p4 at w=22.0-22.3)
K19U02J 2019 UJ2 (arc=146 days, H=19.5 ~426m) from ZTF (2019 Oct. 1.33-43p5)
K19U00O 2019 UO (Q=4.343 AU, arc=2 opp, H=20.0 ~339m) from MLS (2019 Sept. 28.29-31p4), ZTF (2019 Oct. 7.11p1 & 2019 Oct. 7.35-39p3), and CSS (2019 Oct. 9.28-30p4)
K19T04J 2019 TJ4 (arc=44 days, H=20.5 ~269m) from MLS (2019 Oct. 20.46-48p4), Steward Mt. Lemmon Sta. (2019 Oct. 25.46p3), and PS1 (2019 Nov. 5.56-60p4)
K19R00D 2019 RD (Q=4.241 AU, arc=236 days, H=19.4 ~446m) from PS1 (2019 July 29.42-43p2)
K19O02P 2019 OP2 (arc=203 days, H=20.8 ~234m) from MLS (2019 Sept. 2.31-32p4)
K19N02X 2019 NX2 (arc=38 days, H=21.1 ~204m) from PS1 (2019 June 12.55-56p2)
K19L05K 2019 LK5 (arc=2 opp, H=18.9 ~562m) from PS2 (2019 Nov. 30.37-41p4) and PS1 (2019 Dec. 20.36-38p3)
K18X05V 2018 XV5 (Q=4.228 AU, arc=6 opp, H=17.8 ~933m) from the Sloan Digital Sky Survey (SDSS) (2001 March 19.34p2 at V=21.53-22.53) and MLS (2018 Sept. 10.47-48p4)
K18G04X 2018 GX4 (arc=3 opp, H=19.2 ~490m) from MLS (2018 May 21.19-21p4) and Xuyi Sta. (April 27.64-67p3)
K18A02G 2018 AG2 (arc=4 opp, H=19.8 ~371m) from PS1 (Jan. 29.61-63p3)
K17O18S 2017 OS18 (arc=3 opp, H=20.2 ~309m) from PS2 (April 27.36-40p3)
K17M04X 2017 MX4 (arc=4 opp, H=20.8 ~234m) from PS1 (2014 Aug. 31.52-54p3)
K17F90E 2017 FE90 (arc=3 opp, H=19.7 ~389m) from Farpoint Obs. (April 28.12-14p4)
K16L51F 2016 LF51 (arc=4 opp, H=18.7 ~616m) from PS2 (April 27.35-39p4)
K16AE7X 2016 AX147 (arc=4 opp, H=17.8 ~933m) from ATLAS Haleakala (April 27.26-28p4)
K15FB8T 2015 FT118 (arc=3 opp, H=20.5 ~269m) from Farpoint Obs. (April 28.21-23p3) and Chabot Obs. (April 28.23-25p3)
K15F36C 2015 FC36 (arc=3 opp, H=18.7 ~616m) from program code "!" (10) via DECam (2015 March 19.01-03p4 at g=22.4)
K15Bo9L 2015 BL509 (i=50.2°, arc=3 opp, H=20.0 ~339m) from DECam/code "!" (10) (2015 March 12.01-02p4 at g=22.7)
K13P21D 2013 PD21 (arc=3 opp, H=19.4 ~446m) from ARO Westfield (April 22.32-35p3 at V=24.0-4 & 27.31-34p4 at V=23.9-24.3)
K13G07Y 2013 GY7 (arc=3 opp, H=20.4 ~282m) from Chabot Obs. (April 28.21-22p3)
K10X11D 2010 XD11 (q=0.326 AU, Q=4.098 AU, arc=4 opp, H=17.9 ~891m) from Mirasteilas Obs. (April 27.81-82p3)
K10ED5C 2010 EC135 (arc=3 opp, H=20.2 ~309m) from ATLAS Haleakala (April 27.46-50p4)
K09Q34D 2009 QD34 (arc=4 opp, H=18.0 ~851m) from PS1 (April 27.47-51p4 at w=21.6-22.1)
K09F25L 2009 FL25 (arc=3 opp, H=19.3 ~467m) from PS1 (2018 July 10.52-55p4 at w=21.9-22.1 & 2019 Feb. 5.64-66p3 at w=21.7-22.0)
K07H82X 2007 HX82 (Q=4.101 AU, arc=3 opp, H=20.4 ~282m) from PS2 (April 25.46-50p3)
K06U63D 2006 UD63 (arc=4 opp, H=18.8 ~589m) from ATLAS Haleakala (April 27.53-55p4)
K06P17Y 2006 PY17 (arc=6 opp, H=19.2 ~490m) from MLS (April 27.28-30p4)
K06K21Q 2006 KQ21 (arc=4 opp, H=18.5 ~676m) from PS1 (April 27.47-49p3)
K06G02X 2006 GX2 (arc=4 opp, H=20.6 ~257m) from PS1 (April 27.52-56p2)
K04F29F 2004 FF29 (arc=6 opp, H=18.1 ~812m) from MLS (April 27.38-40p4), CSS (April 27.43-44p4), PS1 (April 27.47-51p4), and ATLAS Haleakala (April 27.51-60p4)
K00WE8O 2000 WO148 (arc=4 opp, H=20.5 ~269m) from PS2 (April 27.41-43p3)
r9940 539940 2017 HW1 from QOS Obs. (April 27.84p15), Foxfire Village Obs. (April 28.05-10p3), and AHS Obs. (April 28.17p1)
q3670 523670 2013 EP41 from Xuyi Sta. (April 27.73-75p3)
p9354 519354 2011 KR12 from MLS (April 27.30-32p4)
p5446 515446 2013 UG5 from MLS (April 27.35-36p4)
p0262 510262 2011 HJ61 from MLS (April 27.32-34p4)
p0073 510073 2010 JF88 from Xuyi Sta. (April 27.73-75p2)
o0094 500094 2012 BC20 from ZTF (April 25.19-24p4)
n5323 495323 2014 JG78 from PS1 (April 27.58-60p3)
n4706 494706 2005 GL9 from MLS (April 27.39-40p3)
n2143 492143 2013 OE from ZTF (April 24.19p1, 24.25p1 & 25.19-23p2)
m4725 484725 2008 XP2 from PS1 (April 27.47-51p4 at w=21.7-22.2)
k8448 468448 2003 LS3 from Xuyi Sta. (April 27.66-67p2)
i8818 448818 2011 UU20 from CSS (April 27.19-21p4)
h3992 433992 2000 HD74 from ATLAS Haleakala (April 27.42-45p4)
h0802 430802 2004 XK4 from PS1 (April 27.47-49p3 at w=21.9-22.1)
c8838 388838 2008 EZ5 from CSS (April 27.19-21p4) and ATLAS Haleakala (April 27.31-34p4)
b4188 374188 2005 AD3 from ATLAS Haleakala (April 27.24-27p4)
Y9928 349928 2009 WD106 from CSS (April 27.13-15p3), MLS (April 27.13-15p4), and ATLAS Haleakala (April 27.26-28p4)
X3555 333555 2005 VY17 from ATLAS Mauna Loa (April 27.44-51p4)
W9340 329340 2001 LM5 from MLS (April 27.16-17p4)
V5098 315098 2007 EX from MLS (April 27.13-15p4) and ATLAS Haleakala (April 27.26-28p4)
R7142 277142 2005 LG8 from MLS (April 27.28-30p4)
R5714 275714 2000 YH4 from PS1 (April 27.52-55p3)
Q7494 267494 2002 JB9 from ATLAS Haleakala (April 27.57-59p4)
O2450 242450 2004 QY2 from WISE (April 26.78p1, 26.91p1, 27.04p1, 27.18p1 & 27.31p1)
O1662 241662 2000 KO44 from MLS (April 27.45-47p4)
L9527 219527 2001 QK142 from MLS (April 27.35-36p4)
L0012 210012 2006 KT1 from Xuyi Sta. (April 27.64-66p3)
K3217 203217 2001 FX9 from MLS (April 27.39-40p3) and PS1 (April 27.47-51p4)
J3178 193178 2000 PK5 from MLS (April 27.30-32p4)
J2563 192563 1998 WZ6 from CSS (April 27.47-48p4) and ATLAS Haleakala (April 27.60-62p4)
I9263 189263 2005 CA from PS1 (April 27.42-45p4)
I6822 186822 2004 FE31 from CSS (April 27.41-42p3)
H5189 175189 2005 EC224 from Foxfire Village Obs. (April 28.07-10p3)
G9675 169675 2002 JM97 from ATLAS Haleakala (April 27.51-53p4)
G4400 164400 2005 GN59 from MLS (April 27.34-36p4) and PS1 (April 27.42-44p3)
G3243 163243 2002 FB3 from ATLAS Haleakala (April 27.25-28p4)
G2039 162039 1996 JG from PS2 (April 27.35-39p3)
F9533 159533 2001 HH31 from ZTF (April 26.25-29p2)
F4589 154589 2003 MX2 from MLS (April 27.34-36p4) and PS1 (April 27.41-45p4)
F4229 154229 2002 JN97 from PS2 (April 27.40-43p4)
F2564 152564 1992 HF from MLS (April 27.46-47p3)
F2561 152561 1991 RB from MLS (April 27.24-26p4) and Xuyi Sta. (April 27.60-61p2)
E4861 144861 2004 LA12 from ZTF (April 26.26p2, 26.30p1 & 26.39-41p2)
E2555 142555 2002 TB58 from CSS (April 27.28-29p4) and ATLAS Haleakala (April 27.37-39p4)
E1495 141495 2002 EZ11 from CSS (April 27.30-32p3)
D8847 138847 2000 VE62 from Pin Oak Obs. (April 27.08-13p3), CSS (April 27.15-17p4), and ATLAS Haleakala (April 27.27-29p4)
D7064 137064 1998 WP5 from CSS (April 27.34-36p4), ATLAS Haleakala (April 27.41-45p4), and Foxfire Village Obs. (April 28.08-10p3)
D6923 136923 1998 JH2 from CSS (April 27.36-38p4), PS1 (April 27.42-45p4), and ATLAS Haleakala (April 27.46-50p4)
D6618 136618 1994 CN2 from PS2 (April 27.35-39p4)
99935 99935 2002 AV4 from CSS (April 27.34-36p4) and Foxfire Village Obs. (April 28.07-09p3)
89958 89958 2002 LY45 from PS1 (April 27.47-50p4)
88264 88264 2001 KN20 from Xuyi Sta. (April 27.82-83p3)
86667 86667 2000 FO10 from CSS (April 27.39-40p4), ATLAS Haleakala (April 27.46-50p4), Xuyi Sta. (April 27.65-67p3), and QOS Obs. (April 27.86p8)
85628 85628 1998 KV2 from ATLAS Haleakala (April 27.46-51p4), Xuyi Sta. (April 27.64-67p3), and AHS Obs. (April 28.21-22p3)
85275 85275 1994 LY from ATLAS Haleakala (April 27.52-53p3)
68278 68278 2001 FC7 from CSS (April 27.34-36p4) and ATLAS Haleakala (April 27.41-45p4)
66251 66251 1999 GJ2 from CSS (April 27.36-38p4), ATLAS Haleakala (April 27.46-50p4), and Xuyi Sta. (April 27.65-68p3)
66008 66008 1998 QH2 from ATLAS Mauna Loa (April 27.60-63p4)
65909 65909 1998 FH12 from MLS (April 27.41-42p4)
52768 52768 1998 OR2 from Pin Oak Obs. (April 27.08-11p2), Dark Sky New Mexico Obs. (April 27.17-18p6), CSS (April 27.19-20p3), San Vito Obs. (April 27.80p2), Saarbruecken Rastpfuhl Obs. (April 27.82p2), Mirasteilas Obs. (April 27.83-87p11), PMPHR Obs. (April 27.83-85p5), Linhaceira Obs. (April 27.85-99p8), Foxfire Village Obs. (April 28.04-07p3), and Wiggins Obs. (April 28.13-14p2)
36183 36183 1999 TX16 from MLS (April 27.41-42p4) and ATLAS Haleakala (April 27.48-49p4)
35107 35107 1991 VH from ATLAS Mauna Loa (April 27.29-31p4)
18172 18172 2000 QL7 from ATLAS Haleakala (April 27.31-34p4)
18109 18109 2000 NG11 from MLS (April 27.32-34p4) and PS1 (April 27.41-44p4)
15817 15817 Lucianotesi (1994 QC) from MLS (April 27.45-47p3)
11066 11066 Sigurd (1992 CC1) from PS2 (April 27.25-29p3) and ATLAS Haleakala (April 27.29-32p4)
09400 9400 1994 TW1 from ATLAS Mauna Loa (April 27.24-26p4)
07753 7753 1988 XB from CSS (April 27.36-38p4) and PS1 (April 27.41-44p4)
06050 6050 Miwablock (1992 AE) from MLS (April 27.40-42p4), PS1 (April 27.47-51p4), and ATLAS Haleakala (April 27.51-60p4)
06047 6047 1991 TB1 from ATLAS Haleakala (April 27.31-34p4)
05751 5751 Zao (1992 AC) from MLS (April 27.43-45p4)
04954 4954 Eric (1990 SQ) from CSS (April 27.32-36p8)
04055 4055 Magellan (1985 DO2) from MLS (April 27.48-49p4)
01981 1981 Midas (1973 EA) from ZTF (April 24.16p2 & 24.21p2)
01917 1917 Cuyo (1968 AA) from CSS (April 27.43-44p4), ATLAS Haleakala (April 27.43-44p4), PS2 (April 27.45-47p3), and Xuyi Sta. (April 27.68-71p3)
01866 1866 Sisyphus (1972 XA) from ATLAS Mauna Loa (April 27.24-26p4)
01685 1685 Toro (1948 OA) from WISE (April 24.23p1, 24.29p1, 24.62p1, 24.88p1, 25.01p1 & 25.14p1) and CSS (April 27.47-48p4)

MPEC 2020-H210 - "02:22 UT" - 2020 HR7

K20H07R 2020 HR7 (Earth MOID=8.4 LD, H=25.3 ~29m) was picked up at 1219 UT on 27 April by PS1, observing it at April 27.51-56p6. This detection was confirmed by PS2 (April 26.45-48p3), Schwarzschild Obs. (April 27.88p5), Visnjan Obs. (April 27.90p2), Pascoli Obs. (April 27.90-91p3), and KLENOT (April 27.92p5).

MPEC 2020-H209 - "02:15 UT" - 2020 HQ7

K20H07Q 2020 HQ7 (H=26.1 ~20m, NHATS) was picked up at 1013 UT on 26 April by PS1, observing it at April 26.43-46p3. This detection was confirmed by Steward Mt. Lemmon Sta. (April 27.19p4), ARO Westfield (April 27.23-24p2), Schwarzschild Obs. (April 27.93p3), and Visnjan Obs. (April 27.94p3).

MPEC 2020-H208 - "02:15 UT" - 2020 HP7

K20H07P 2020 HP7 (small asteroid, H=24.1 ~51m) was picked up at 1020 UT on 26 April by MLS, observing it at April 26.43-45p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 26.47-48p4 & 27.34p4), KLENOT (April 26.96p2), ARO Westfield (April 27.30-31p4), and Visnjan Obs. (April 28.03-04p5).

MPEC 2020-H207 - "02:14 UT" - 2020 HO7

K20H07O 2020 HO7 (small asteroid, H=23.8 ~59m) was picked up at 0723 UT on 26 April by MLS, observing it at April 26.31-32p3. This detection was confirmed by Steward Mt. Lemmon Sta. (April 26.38p3 & 27.18p2), Schwarzschild Obs. (April 26.91p4 & 27.93-94p4), and ARO Westfield (April 27.22-26p8).

MPEC 2020-H206 - "02:14 UT" - 2020 HN7

K20H07N 2020 HN7 (small asteroid, H=24.5 ~43m) was picked up at 0450 UT on 26 April by MLS, observing it at April 26.20-22p4. This detection was confirmed by Steward Mt. Lemmon Sta. (April 26.28-29p4 & 27.13p4), Visnjan Obs. (April 26.83-84p5), Schwarzschild Obs. (April 26.83-84p3 & 27.90p4), KLENOT (April 26.85p2), St. Pardon de Conques Obs. (April 26.94-96p3), and ARO Westfield (April 27.11-12p3).

MPEC 2020-H205 - "02:13 UT" - 2020 HM7

K20H07M 2020 HM7 (risk listed, Earth MOID=0.4 LD, H=25.9 ~22m, close passer, NHATS target) was picked up at 0915 UT on 27 April by CSS, observing it at April 27.39-40p3. This detection was confirmed by PS1 (April 25.56-60p4), PS2 (April 26.44-48p2), ATLAS Haleakala (April 27.43-44p4), Steward Mt. Lemmon Sta. (April 27.44p4), Pascoli Obs. (April 27.86-87p3), ROASTERR-1 (April 27.86-87p2), Oberfrauendorf Obs. (April 27.87-88p6), Visnjan Obs. (April 27.87p4), KLENOT (April 27.91p6), and Schwarzschild Obs. (April 27.93p3).

MPEC 2020-H204 - "02:12 UT" - 2020 HL7

K20H07L 2020 HL7 (small asteroid, H=22.9 ~89m) was picked up at 0549 UT on 25 April by MLS, observing it at April 25.24-26p4. This detection was confirmed by Chabot Obs. (April 25.28-29p4), Steward Mt. Lemmon Sta. (April 25.31-32p4, 26.14p4 & 27.14p4), Aorangi Iti Obs. (April 25.36-37p3), Visnjan Obs. (April 25.83-86p2), Dettelbach Vineyard Obs. (April 25.83-85p3), Guidestar Obs. (April 25.84-86p3), St. Pardon de Conques Obs. (April 25.84-85p3), Schwarzschild Obs. (April 25.94p2, 26.83p3 & 27.88-89p3), Farpoint Obs. (April 26.12-13p5), Jana Pittichova Chesley via Table Mtn. Obs. (April 26.16-17p2), Sandlot Obs. (April 26.18-19p4), KLENOT (April 26.83p10 & 27.83p6), Pascoli Obs. (April 26.88-90p3), and ARO Westfield (April 27.12-13p4).

MPEC 2020-H203 - "02:12 UT" - 2020 HK7

K20H07K 2020 HK7 (borderline-small, q=0.339 AU, H=21.8 ~148m) was picked up at 0751 UT on 26 April by MLS, observing it at April 26.33-34p4. This detection was confirmed by PS1 (April 2.60p1), Steward Mt. Lemmon Sta. (April 26.41-42p4 & 27.19p3), Schwarzschild Obs. (April 26.90-91p3 & 27.92-93p3), Visnjan Obs. (April 26.93-94p4), KLENOT (April 26.94-95p2 & 27.89-90p3), Pascoli Obs. (April 26.97-99p4), St. Pardon de Conques Obs. (April 26.98-99p2), ARO Westfield (April 27.20p3), and Pittichova/Table Mtn. (April 27.35-37p2).

MPEC 2020-H202 - "00:03 UT" - Comet P/2005 JD108 = 2020 H1 (Catalina-NEAT)

PK20H010 P/2020 H1 (q=4.065 AU, Q=9.055 AU, TP=2021 Dec. 30.46223 TT) was picked up at 0201 UT on 26 April by ESA OGS, observing it at April 26.08-11p4. This detection was confirmed by Kurtze/Faulkes North (April 27.42-43p3).
PK05JA8D P/2005 JD108 (Catalina-NEAT) (q=4.029 AU, Q=8.853 AU, TP=2005 Aug. 10.49764 TT)

Observers on 28 April '20

A total of 65 observers appear in today's MPECs.

Code	Observer / observatory
`U71`	AHS Obs., 3 in MPEC 2020-H211 -- 85628, 539940, 388945
`A50`	Andrushivka Obs. in Ukraine, 1 in MPEC 2020-H213 -- 2020 HT7
`R57`	Aorangi Iti Obs. in New Zealand, 1 in MPEC 2020-H204 -- 2020 HL7
`251`	Arecibo in Puerto Rico, 1 in radar -- 2020 HJ6
`H21`	Astronomical Research Obs. Westfield in Illinois, 10 in MPECs 2020-H203, 2020-H204, 2020-H206, 2020-H207, 2020-H208, 2020-H209, 2020-H211, 2020-H212, 2020-H213 & 2020-H215 -- 2020 HV7, 2020 HT7, 2020 HS7, 2020 HQ7, 2020 HP7, 2020 HO7, 2020 HN7, 2020 HL7, 2020 HK7, 2013 PD21
`T05`	ATLAS Haleakala in Hawaii, 34 in MPECs 2020-H205 & 2020-H211 -- 2020 HQ3, 2020 HM7, 2020 HB6, 2020 GD2, 2019 XG1, 2016 AX147, 2010 EC135, 2006 UD63, 2004 FF29, 86667, 85628, 85275, 68278, 66251, 433992, 388838, 374188, 36183, 349928, 315098, 267494, 192563, 190166, 18172, 169675, 163243, 142555, 138847, 137064, 136923, 11066, 6050, 6047, 1917
`T08`	ATLAS Mauna Loa in Hawaii, 9 in MPECs 2020-H211 & 2020-H220 -- 2020 HT3, 2020 HM7, C/2020 H2, 2020 FA7, 66008, 35107, 333555, 9400, 1866
`V00`	Bok Telescope in Arizona, 1 in MPEC 2020-H211 -- 2018 KP
`703`	Catalina Sky Survey (CSS) in Arizona, 29 in MPECs 2020-H205, 2020-H211 & 2020-H220 -- 2020 HU2, 2020 HQ3, 2020 HM7, 2020 HB6, C/2020 H2, 2020 GD2, 2019 UO, 2006 FH36, 2004 FF29, 99935, 86667, 68278, 66251, 52768, 448818, 388838, 349928, 192563, 190166, 186822, 142555, 141495, 138847, 137064, 136923, 7753, 4954, 1917, 1685
`V06`	Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) in Arizona, 9 in MPECs 2020-H211, 2020-H216 & 2020-H219 -- 2020 HW7, 2020 HU6, 2020 HT6, 2020 HP3, 2020 HJ2, 2020 HD2, 2020 HB8, 2020 FX6, 2018 EB
`G58`	Chabot Obs. in northern California, 3 in MPECs 2020-H204 & 2020-H211 -- 2020 HL7, 2015 FT118, 2013 GY7
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2020-H220 -- C/2020 H2
`V16`	Dark Sky New Mexico Obs. in New Mexico, 1 in MPEC 2020-H211 -- 52768
`W84!`	program code "!" (10) via DECam in Chile, 2 in MPEC 2020-H211 -- 2015 FC36, 2015 BL509
`K87`	Dettelbach Vineyard Obs. in Germany, 1 in MPEC 2020-H204 -- 2020 HL7
`J04`	ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2020-H202 & 2020-H221 -- C/2020 H3, P/2020 H1
`734`	Farpoint Obs. in Kansas, 5 in MPECs 2020-H204, 2020-H211 & 2020-H212 -- 2020 HS7, 2020 HL7, 2017 FE90, 2015 FT118, 2006 FH36
`F652`	Lothar Kurtze in Germany via Faulkes Telescope North in Hawaii, 2 in MPECs 2020-H202 & 2020-H221 -- C/2020 H3, P/2020 H1
`W46`	Foxfire Village Obs., 5 in MPEC 2020-H211 -- 99935, 539940, 52768, 175189, 137064
`C73`	Galati Obs. in Romania, 1 in MPEC 2020-H220 -- C/2020 H2
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2020-H204 -- 2020 HL7
`U69#`	program code "#" (12) via iTelescope Obs. Auberry in northern California, 1 in MPEC 2020-H220 -- C/2020 H2
`H06`	iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2020-H220 -- C/2020 H2
`H06\|`	Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 3 in MPECs 2020-H213, 2020-H220 & 2020-H221 -- 2020 HT7, C/2020 H3, C/2020 H2
`Q62`	iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-H211 -- 2020 HL1
`P93`	JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2020-H213 -- 2020 HT7
`381`	Kiso Obs. in Japan, 1 in MPEC 2020-H213 -- 2020 HT7
`246`	KLENOT in the Czech Republic, 16 in MPECs 2020-H203, 2020-H204, 2020-H205, 2020-H206, 2020-H208, 2020-H210, 2020-H211, 2020-H212, 2020-H213, 2020-H215, 2020-H217, 2020-H218 & 2020-H221 -- 2020 HX7, 2020 HV7, 2020 HT7, 2020 HS7, 2020 HR7, 2020 HQ4, 2020 HP7, 2020 HN7, 2020 HN5, 2020 HM7, 2020 HL7, 2020 HK7, 2020 HK3, 2020 HJ6, 2020 HA8, C/2020 H3
`V37`	LCO McDonald Obs. in Texas, 1 in MPEC 2020-H211 -- 2020 HT3
`938`	Linhaceira Obs. in Portugal, 1 in MPEC 2020-H211 -- 52768
`B67`	Mirasteilas Obs. in Switzerland, 2 in MPEC 2020-H211 -- 2010 XD11, 52768
`V01`	Mountainville Obs. in Utah, 1 in MPEC 2020-H211 -- 2020 HW3
`474`	Mt. John Obs. in New Zealand, 3 in MPECs 2020-H216, 2020-H217 & 2020-H218 -- 2020 HX7, 2020 HW7, 2020 HA8
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 52 in MPECs 2020-H203, 2020-H204, 2020-H206, 2020-H207, 2020-H208, 2020-H211, 2020-H214, 2020-H217, 2020-H218, 2020-H219 & 2020-H221 -- 2020 HX7, 2020 HV5, 2020 HU7, 2020 HT5, 2020 HP7, 2020 HO7, 2020 HN7, 2020 HM4, 2020 HL7, 2020 HK7, 2020 HD4, 2020 HB8, 2020 HB6, 2020 HA8, C/2020 H3, 2020 GD2, 2019 XG1, 2019 WX, 2019 UO, 2019 UC9, 2019 UB11, 2019 TJ4, 2019 OP2, 2018 XV5, 2018 KP, 2018 GX4, 2017 RV, 2006 PY17, 2004 FF29, 65909, 519354, 515446, 510262, 494706, 36183, 349928, 329340, 315098, 277142, 241662, 219527, 203217, 193178, 18109, 164400, 15817, 154589, 152564, 152561, 6050, 5751, 4055
`Z80`	Northolt Branch Obs. in England, 2 in MPEC 2020-H211 -- 2020 HW6, 2020 HP6
`G34`	Oberfrauendorf Obs. in Germany, 2 in MPECs 2020-H205 & 2020-H213 -- 2020 HT7, 2020 HM7
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 53 in MPECs 2020-H203, 2020-H205, 2020-H209, 2020-H210, 2020-H211, 2020-H215, 2020-H216, 2020-H217 & 2020-H218 -- 2020 HX7, 2020 HX5, 2020 HW7, 2020 HV7, 2020 HV6, 2020 HT5, 2020 HR7, 2020 HQ7, 2020 HN6, 2020 HM7, 2020 HM2, 2020 HL5, 2020 HK7, 2020 HH3, 2020 HG6, 2020 HF4, 2020 HD7, 2020 HD4, 2020 HA8, 2020 HA7, 2019 YW3, 2019 XG1, 2019 WV4, 2019 UX13, 2019 UF10, 2019 TJ4, 2019 TF2, 2019 RD, 2019 NX2, 2019 LK5, 2018 KP, 2018 AG2, 2017 MX4, 2017 FQ90, 2009 QD34, 2009 OS5, 2009 FL25, 2006 KQ21, 2006 GX2, 2004 FF29, 89958, 495323, 484725, 430802, 275714, 203217, 189263, 18109, 164400, 154589, 136923, 7753, 6050
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 20 in MPECs 2020-H205, 2020-H210, 2020-H211, 2020-H212, 2020-H217 & 2020-H218 -- 2020 HX7, 2020 HT2, 2020 HS7, 2020 HR7, 2020 HM7, 2020 HD5, 2020 HA8, 2019 VN6, 2019 LK5, 2017 OS18, 2017 FQ90, 2016 LF51, 2007 HX82, 2000 WO148, 190166, 162039, 154229, 136618, 11066, 1917
`K63`	Pascoli Obs. in Italy, 5 in MPECs 2020-H203, 2020-H204, 2020-H205, 2020-H210 & 2020-H213 -- 2020 HT7, 2020 HR7, 2020 HM7, 2020 HL7, 2020 HK7
`V93`	Pin Oak Obs., 3 in MPEC 2020-H211 -- 52768, 388945, 138847
`K80`	Platanus Obs., 1 in MPEC 2020-H213 -- 2020 HT7
`K81`	PMPHR Obs., 1 in MPEC 2020-H211 -- 52768
`654`	Pomona College Table Mtn. Obs. in southern California, 1 in MPEC 2020-H211 -- 2020 HT3
`D29`	Purple Mtn. Obs. Xuyi Station in China, 12 in MPEC 2020-H211 -- 2018 GX4, 2006 FH36, 88264, 86667, 85628, 66251, 523670, 510073, 468448, 210012, 152561, 1917
`L18`	QOS Obs., 3 in MPECs 2020-H211 & 2020-H213 -- 2020 HT7, 86667, 539940
`L04`	ROASTERR-1 in Romania, 3 in MPECs 2020-H205, 2020-H211 & 2020-H213 -- 2020 HT7, 2020 HM7, 2019 XG1
`L40`	Saarbruecken Rastpfuhl Obs., 1 in MPEC 2020-H211 -- 52768
`233`	San Vito Obs. in Italy, 1 in MPEC 2020-H211 -- 52768
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2020-H204 -- 2020 HL7
`C95`	SATINO-1 in France, 1 in MPEC 2020-H211 -- 2020 BR10
`033`	Schwarzschild Obs. in Germany, 12 in MPECs 2020-H203, 2020-H204, 2020-H205, 2020-H206, 2020-H207, 2020-H209, 2020-H210, 2020-H212, 2020-H213, 2020-H215, 2020-H216 & 2020-H217 -- 2020 HX7, 2020 HW7, 2020 HV7, 2020 HT7, 2020 HS7, 2020 HR7, 2020 HQ7, 2020 HO7, 2020 HN7, 2020 HM7, 2020 HL7, 2020 HK7
`645`	Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2020-H211 -- 2018 XV5
`G40*`	program code "*" (19) via Slooh.com Canary Islands Obs. in the Canary Islands, 1 in MPEC 2020-H220 -- C/2020 H2
`G409`	B. Lutkenhoner in Germany via Slooh.com Canary Islands Obs. in the Canary Islands, 2 in MPECs 2020-H220 & 2020-H221 -- C/2020 H3, C/2020 H2
`W34`	Squirrel Valley Obs. in North Carolina, 1 in MPEC 2020-H212 -- 2020 HS7
`I93`	St. Pardon de Conques Obs. in France, 3 in MPECs 2020-H203, 2020-H204 & 2020-H206 -- 2020 HN7, 2020 HL7, 2020 HK7
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 51 in MPECs 2020-H203, 2020-H204, 2020-H205, 2020-H206, 2020-H207, 2020-H208, 2020-H209, 2020-H211, 2020-H213, 2020-H215, 2020-H217, 2020-H218, 2020-H220 & 2020-H221 -- 2020 HY6, 2020 HY3, 2020 HY1, 2020 HY, 2020 HX7, 2020 HW6, 2020 HW1, 2020 HV7, 2020 HV2, 2020 HU5, 2020 HU2, 2020 HT7, 2020 HT3, 2020 HS6, 2020 HS1, 2020 HQ7, 2020 HQ4, 2020 HQ3, 2020 HP7, 2020 HO7, 2020 HO1, 2020 HN7, 2020 HN6, 2020 HM7, 2020 HM6, 2020 HM5, 2020 HM4, 2020 HL7, 2020 HL6, 2020 HL4, 2020 HL3, 2020 HL1, 2020 HK7, 2020 HK6, 2020 HK3, 2020 HG5, 2020 HE6, 2020 HE3, 2020 HD5, 2020 HC6, 2020 HC1, 2020 HB6, 2020 HB5, 2020 HA8, 2020 HA5, C/2020 H3, C/2020 H2, 2020 FB6, 2020 DN1, 2020 DB5, 2019 TJ4
`A71`	Stixendorf Obs. in Austria, 1 in MPEC 2020-H220 -- C/2020 H2
`Q38`	Swan Hill Obs., 1 in MPEC 2020-H220 -- C/2020 H2
`673!`	Jana Pittichova Chesley via Table Mtn. Obs. in southern California, 2 in MPECs 2020-H203 & 2020-H204 -- 2020 HL7, 2020 HK7
`X02`	Telescope Live in Chile, 1 in MPEC 2020-H220 -- C/2020 H2
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 1 in MPEC 2020-H211 -- 2015 XW377
`L01`	Visnjan Obs. in Croatia, 15 in MPECs 2020-H203, 2020-H204, 2020-H205, 2020-H206, 2020-H208, 2020-H209, 2020-H210, 2020-H212, 2020-H213, 2020-H214, 2020-H215, 2020-H216, 2020-H218, 2020-H220 & 2020-H221 -- 2020 HW7, 2020 HV7, 2020 HU7, 2020 HT7, 2020 HS7, 2020 HR7, 2020 HQ7, 2020 HP7, 2020 HN7, 2020 HM7, 2020 HL7, 2020 HK7, 2020 HA8, C/2020 H3, C/2020 H2
`718`	Wiggins Obs. in Utah, 1 in MPEC 2020-H211 -- 52768
`C51`	WISE in Earth polar orbit, 2 in MPEC 2020-H211 -- 242450, 1685
`N88`	Xingming Obs. #3, 1 in MPEC 2020-H212 -- 2020 HS7
`I41`	Zwicky Transient Facility (ZTF) in southern California, 10 in MPEC 2020-H211 -- 2020 HT3, 2020 GF3, 2019 UO, 2019 UJ2, 2019 UB11, 500094, 492143, 159533, 144861, 1981

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 28 April '20

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2314 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL and NEODyS listings is 100 years, and both post impact solutions beyond that for some special objects.
For the latest official risk assessments, and for explanations of the terminology, see the NASA/JPL Sentry and NEODyS CLOMON2 risk pages.
0000NNN000 Object	Risk Monitor	When Noted UTC	0000T0000 Year Range	VI #	000NN00 Prob Cum	T0000 PS Cum	T0000 PS Max	T S	Notes for Today's Latest Risk Assessments

2020 HW7	JPL Sentry	1700	2044-2119	11	6.921382e-07	-7.18	-7.42	0	JPL: Computed at 07:42 today Pacific time based on 17 observations spanning 2.1228 days (2020-Apr-26.364714 to 2020-Apr-28.4875). Diameter approximately 0.013 km. from weighted mean H=27.15.

2020 HM7	NEODyS	1730	2088-2112	2	3.02e-08	-8.14	-8.25	0	NEODyS #2 for the day: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2020-04-25.559 to 2020-04-28.434."

2020 HE7	NEODyS	1700	2092	1	2.08e-09	-10.95	-10.95	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2020-04-26.330 to 2020-04-27.189."

2020 HU6	NEODyS	1730	2063-2106	7	3.99e-08	-4.44	-4.69	0	NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2020-04-22.601 to 2020-04-28.465."
2020 HU6	JPL Sentry	1700	2063-2100	3	2.3485e-08	-4.64	-4.82	0	JPL: Computed at 07:54 today Pacific time based on 27 observations spanning 5.8640 days (2020-Apr-22.600127 to 2020-Apr-28.46408). Diameter approximately 0.440 km. from weighted mean H=19.43.

2020 HM6	NEODyS	1730	2090	1	5.12e-10	-10.12	-10.12	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2020-04-24.351 to 2020-04-28.236."

2020 HL6	NEODyS	1730	2069-2118	17	6.98e-07	-7.99	-8.37	0	NEODyS: "Based on 28 optical observations (of which 1 are rejected as outliers) from 2020-04-19.446 to 2020-04-28.418."
2020 HL6	JPL Sentry	1700	2053-2115	7	6.47027e-07	-7.94	-8.31	0	JPL: Computed at 08:01 today Pacific time based on 27 observations spanning 8.9722 days (2020-Apr-19.44533 to 2020-Apr-28.41753). Diameter approximately 0.008 km. from weighted mean H=28.07.

2020 HJ6	JPL Sentry	2000	R E M O V E D						JPL #2 for the day: Risk listing removed at 1927 UTC today
2020 HJ6	NEODyS	1730	2092	1	1.38e-07	-7.76	-7.76	0	NEODyS: "Based on 41 optical observations (of which 1 are rejected as outliers) from 2020-04-19.454 to 2020-04-27.867."

2020 HV5	JPL Sentry	1700	R E M O V E D						JPL: Risk listing removed at 1452 UTC today
2020 HV5	NEODyS	1730	2037-2105	5	3.62e-08	-8.06	-8.41	0	NEODyS: "Based on 7 optical observations (of which 0 are rejected as outliers) from 2020-04-26.371 to 2020-04-27.319."

2020 HQ4	NEODyS	1730	2058-2118	163	1.74e-04	-4.92	-5.28	0	NEODyS: "Based on 84 optical observations (of which 1 are rejected as outliers) from 2020-04-22.150 to 2020-04-28.152."
2020 HQ4	JPL Sentry	1700	2052-2119	42	0.0001397067396	-4.98	-5.36	0	JPL: Computed at 08:06 today Pacific time based on 81 observations spanning 6.0012 days (2020-Apr-22.14953 to 2020-Apr-28.15077). Diameter approximately 0.015 km. from weighted mean H=26.80.

2020 HM4	NEODyS	1730	2054-2061	3	2.07e-07	-6.22	-6.3	0	NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2020-04-20.377 to 2020-04-28.338."
2020 HM4	JPL Sentry	1700	2061-2061	1	2.017e-07	-6.21	-6.21	0	JPL: Computed at 07:57 today Pacific time based on 31 observations spanning 7.9614 days (2020-Apr-20.3758 to 2020-Apr-28.33716). Diameter approximately 0.040 km. from weighted mean H=24.63.

2020 HK3	NEODyS	1730	2073	1	8.89e-09	-7.39	-7.39	0	NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2020-04-19.547 to 2020-04-28.426."

2020 HL1	NEODyS	1730	2055-2066	3	4.17e-06	-5.47	-5.55	0	NEODyS: "Based on 47 optical observations (of which 1 are rejected as outliers) from 2020-04-16.280 to 2020-04-28.311."
2020 HL1	JPL Sentry	1700	2055-2066	3	1.37851e-05	-4.94	-5.06	0	JPL: Computed at 07:36 today Pacific time based on 47 observations spanning 12.031 days (2020-Apr-16.27939 to 2020-Apr-28.31064). Diameter approximately 0.030 km. from weighted mean H=25.27.

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale (next 100 years)

An impact solution, also known as a "virtual impactor" (VI), is not a prediction but rather a possibility derived from a variant orbit calculation that cannot be eliminated yet based on the existing data. Elimination can come quickly with just a little further observation or may take weeks or months, sometimes years. Once superceded or eliminated, a former impact solution has zero relevance to an object's risk. See Jon Giorgini's "Understanding Risk Pages" to learn more.

Chronology on 28 April '20

Times are UTC for when items were noted or added by The Tracking News.

2314	Grabbed MPEC 2020-H221 - Comet C/2020 H3 (Wierzchos) - see above
2130	Grabbed MPEC 2020-H220 - Comet C/2020 H2 (Pruyne) - see above
2000	Noted that JPL Sentry has removed 2020 HJ6 as an impact risk - see above
1900	Noted Radar Astrometry database update - see above
1730	Noted that NEODyS has updated its 2020 HJ6 risk assessment - see above Noted that NEODyS has updated its 2020 HK3 risk assessment - see above Noted that NEODyS has updated its 2020 HL1 risk assessment - see above Noted that NEODyS has updated its 2020 HL6 risk assessment - see above Noted that NEODyS has updated its 2020 HM4 risk assessment - see above Noted that NEODyS has updated its 2020 HM6 risk assessment - see above Noted that NEODyS has updated its 2020 HM7 risk assessment - see above Noted that NEODyS has updated its 2020 HQ4 risk assessment - see above Noted that NEODyS has posted 2020 HU6 as an impact risk - see above Noted that NEODyS has posted 2020 HV5 as an impact risk - see above
1700	Noted that NEODyS has posted 2020 HE7 as an impact risk - see above Noted that JPL Sentry has updated its 2020 HJ6 risk assessment - see above Noted that JPL Sentry has updated its 2020 HL1 risk assessment - see above Noted that JPL Sentry has updated its 2020 HL6 risk assessment - see above Noted that JPL Sentry has updated its 2020 HM4 risk assessment - see above Noted that NEODyS has posted 2020 HM7 as an impact risk - see above Noted that JPL Sentry has updated its 2020 HQ4 risk assessment - see above Noted that JPL Sentry has updated its 2020 HU6 risk assessment - see above Noted that JPL Sentry has removed 2020 HV5 as an impact risk - see above Noted that JPL Sentry has posted 2020 HW7 as an impact risk - see above Grabbed MPEC 2020-H211 - Daily Orbit Update - see above Grabbed MPEC 2020-H212 - 2020 HS7 - see above Grabbed MPEC 2020-H213 - 2020 HT7 - see above Grabbed MPEC 2020-H214 - 2020 HU7 - see above Grabbed MPEC 2020-H215 - 2020 HV7 - see above Grabbed MPEC 2020-H216 - 2020 HW7 - see above Grabbed MPEC 2020-H217 - 2020 HX7 - see above Grabbed MPEC 2020-H218 - 2020 HA8 - see above Grabbed MPEC 2020-H219 - 2020 HB8 - see above
0432	Grabbed MPEC 2020-H203 - 2020 HK7 - see above Grabbed MPEC 2020-H204 - 2020 HL7 - see above Grabbed MPEC 2020-H205 - 2020 HM7 - see above Grabbed MPEC 2020-H206 - 2020 HN7 - see above Grabbed MPEC 2020-H207 - 2020 HO7 - see above Grabbed MPEC 2020-H208 - 2020 HP7 - see above Grabbed MPEC 2020-H209 - 2020 HQ7 - see above Grabbed MPEC 2020-H210 - 2020 HR7 - see above
0009	Grabbed MPEC 2020-H202 - Comet P/2005 JD108 = 2020 H1 (Catalina-NEAT) - see above

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