2020-01-31 Tracking News

Contents on 31 January '20

Traffic Report -- thirteen objects
IAU Minor Planet Center
- NEOCP Activity -- 94 listings
- New MPECs -- 23 MPECs
Observers -- 37 observers
Impact Risk Monitoring -- eight objects
Chronology

Asteroid/Comet Connection (A/CC) Resources:

Consolidated Risk Tables - the CRT page
Of 1092 risk-listed objects, 58 have had news in the last 31 days. Updated at 1651 UTC on 31 Jan.
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.

Traffic Report on 31 January '20

Thirteen objects reported inside ten LD

Thirteen asteroids are reported flying within ten lunar distances (LD) of our planet today. All of them are now and will remain outside three LD on their current passages.

Neighborhood Traffic - sorted by Earth passage distance, grouped by 1.0, 2.41, 5.0 & 10.0 LD boundaries
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
0.51 LD Jan. 27	2020 BA13	6 m	7.54 to 9.82 LD	Jan. 23 - Feb. 1	intruder, risk

1.51 LD Jan. 28	2020 BK13	7 m	6.56 to 8.73 LD	Jan. 23 - Feb. 1	NEW, NHATS target - MPEC
2.00 LD Jan. 21	2020 BB	7 m	7.79 to 8.57 LD	Jan. 9 - Feb. 2	NHATS target, risk
2.15 LD Jan. 28	2020 BG13	9 m	5.23 to 7.01 LD	Jan. 23 - Feb. 2	NEW - MPEC

3.43 LD Feb. 1	2020 BN12	23 m	3.60 from 4.33 LD	Jan. 26 - Feb. 7	NHATS target - DOU
3.69 LD Feb. 4	2013 BA74	27 m	6.40 from 7.82 LD	Jan. 29 - Feb. 9
4.50 LD yesterday	2020 BL11	10 m	4.53 to 4.65 LD	Jan. 17 - Feb. 11	NHATS target
4.78 LD Jan. 29	2020 BL13	17 m	5.32 to 5.97 LD	Jan. 21 - Feb. 5	NEW, NHATS target - MPEC

5.09 LD Jan. 26	2020 BH3	21 m	8.59 to 9.87 LD	Jan. 20 - Feb. 1	NHATS target, risk
5.65 LD today	2020 BZ4	9 m	5.65 LD	Jan. 27 - Feb. 4	NHATS target, Earth closest at 1647 UTC
5.89 LD yesterday	2020 BV7	9 m	5.94 to 6.44 LD	Jan. 26 - Feb. 3	NHATS target
6.58 LD Feb. 8	2020 BL8	24 m	8.34 from 8.79 LD	Jan. 28 - Feb. 18	NHATS target - DOU
9.62 LD today	2020 BR8	26 m	9.62 LD	yesterday - today	Earth closest at 0111 UTC

This report was generated at 2010 UTC with six new discoveries: approaching risk-listed 2020 BW13 (MPEC), three outbound objects: 2020 BL13 (MPEC), 2020 BK13 (MPEC), and 2020 BG13 (MPEC), and two already departed: 2020 BM13 (MPEC), which went by at about 6.8 LD on January 22nd (uncertainty +/- 1.35 hours), and 2020 BJ13 (MPEC), which slipped past at about 5.6 LD the same day (uncertainty +/- 19 minutes). Today's DOU MPEC has follow-up for approaching objects 2020 BK10 and risk-listed 2020 BW5, inbound 2020 BN12 and 2020 BL8, and six departed close-passers: 2020 BW10, 2020 BW8, 2020 BS, 2020 BD, and including risk-listed 2020 BP12 and 2020 AY1.

Approaching - sorted by 10-LD bubble entry date
Earth passage	I D	~Size	Distance today	Inside ten LD	Notes
2.8 LD Feb. 6*	2020 BF10	12 m	11.3 from 13.2 LD	Feb. 1 - 11	EPU +/- 8 mins.*, NHATS target
5.15 LD Feb. 9	2020 BW5	17 m	18.77 from 20.77 LD	Feb. 5 - 14	NHATS target, risk - DOU
1.9 LD Feb. 10*	2020 BK10	19 m	23.4 from 26.0 LD	Feb. 6 - 13	EPU +/- 40 mins.* - DOU
9.1 LD Feb. 24*	2020 BW13	13 m	17.2 from 17.8 LD	Feb. 17 - March 3	NEW, EPU +/- 32 mins.*, risk - MPEC
* EPU = Earth passage uncertainty

Notes: Ten times the distance to the Moon (ten LD) has no astronomical importance but is a useful boundary for reporting about transient natural objects that approach our planet's gravitational sphere of influence (SOI), which has a radius of about 2.41 LD from Earth's center. This puts a focus on some of the most important and very best NEO observation work, representative of the much larger NEO discovery and tracking effort. Object temporal distances are derived by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity on 31 January '20

The MPC's NEO Confirmation Page has 94 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 94 objects listed. Of these, 44 were "one nighters." So far The Tracking News has counted a total of 129 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 31 January '20

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 23 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2020-B291 time-stamped "00:00 UT" - 2020 BG13 - see below
MPEC 2020-B292 time-stamped "00:03 UT" - 2020 BH13 - see below
MPEC 2020-B293 time-stamped "00:04 UT" - 2020 BJ13 - see below
MPEC 2020-B294 time-stamped "00:07 UT" - 2020 BK13 - see below
MPEC 2020-B295 time-stamped "00:09 UT" - 2020 BL13 - see below
MPEC 2020-B296 time-stamped "00:14 UT" - 2020 BM13 - see below
MPEC 2020-B297 time-stamped "00:15 UT" - 2020 BN13 - see below
MPEC 2020-B298 time-stamped "00:44 UT" - 2020 BO13 - see below
MPEC 2020-B299 time-stamped "00:45 UT" - 2020 BP13 - see below
MPEC 2020-B300 time-stamped "00:46 UT" - 2020 BQ13 - see below
MPEC 2020-B301 time-stamped "00:48 UT" - 2020 BR13 - see below
MPEC 2020-B302 time-stamped "00:55 UT" - 2020 BT13 - see below
MPEC 2020-B303 time-stamped "01:11 UT" - 2020 BU13 - see below
MPEC 2020-B304 time-stamped "01:25 UT" - 2020 BV13 - see below
MPEC 2020-B305 time-stamped "11:39 UT" - 2020 BW13 - see below
MPEC 2020-B306 time-stamped "11:43 UT" - 2020 BX13 - see below
MPEC 2020-B307 time-stamped "12:36 UT" - Daily Orbit Update - see below
MPEC 2020-B308 time-stamped "14:36 UT" - 2020 BY13 - see below
MPEC 2020-B309 time-stamped "14:47 UT" - 2018 MF13 - see below
MPEC 2020-B310 time-stamped "15:02 UT" - 2016 CW137 - see below
MPEC 2020-B311 time-stamped "16:31 UT" - 2020 BA14 - see below
MPEC 2020-B312 time-stamped "18:42 UT" - 2017 DU15 - see below
MPEC 2020-B313 time-stamped "21:28 UT" - 2020 BZ13

MPEC 2020-B313 - "21:28 UT" - 2020 BZ13

K20B13Z 2020 BZ13 (Earth MOID=0.1 LD, H=29.9 ~4m) was picked up at 0748 UT on 28 Jan. by the Mt. Lemmon Survey (MLS), observing it at Jan. 28.33-34p3, 28.40-41p4, and 28.46p4. This detection was confirmed by Steward Obs. Mt. Lemmon Station (Jan. 28.37-38p3), Xingming Obs. (Jan. 28.72p3), Great Shefford Obs. (Jan. 28.86-99p18), Calar Alto Schmidt (Jan. 28.89p3 & 28.94p3), and Northolt Branch Obs. (Jan. 28.93p2).

MPEC 2020-B312 - "18:42 UT" - 2017 DU15

K17D15U 2017 DU15 (i=48.0°, H=20.8 ~234m) from Pan-STARRS 1 (PS1) (2011 Feb. 16.49-51p2, 2017 Feb. 1.60-61p2, Jan. 21.64p2 & 31.46-47p2), MLS (Jan. 31.39-41p3), and Steward Mt. Lemmon Sta. (Jan. 31.50-51p4)

MPEC 2020-B311 - "16:31 UT" - 2020 BA14

K20B14A 2020 BA14 (small asteroid, Earth MOID=0.2 LD, H=22.8 ~93m) was picked up at 1010 UT on 29 Jan. by MLS, observing it at Jan. 29.42-44p4 at G=21.5-22.2 and 30.46p3 at G=22.1-2. This detection was confirmed by Pan-STARRS 2 (PS2) (Jan. 26.55-57p3 at G=21.3-22.2 & 29.53-56p4 at G=21.4-22.0) and Magdalena Ridge Obs. (MRO) (Jan. 29.46-49p4).

MPEC 2020-B310 - "15:02 UT" - 2016 CW137

K16CD7W 2016 CW137 (i=37.7°, H=19.4 ~446m) from UH/Tholen NEO Follow-Up CFH Telescope (Jan. 29.65p2 at G=24.36-49 & 30.66p3 at G=24.27-46)

MPEC 2020-B309 - "14:47 UT" - 2018 MF13

K18M13F 2018 MF13 (KBO, q=31.300 AU, Q=51.605 AU, H=8.7 ~61.6 km) was picked up at 0715 UT on 16 June 2018 by DECam, observing it at 2015 June 21.28-34p3, 2015 June 24.29-36p3, 2018 June 16.30p1 at V=25.6, 2018 June 16.39p1 at V=25.3, 2018 June 17.15p1 at V=25.2, 2018 June 17.25p1, 2018 June 17.34p1 at V=26.1, 2018 June 18.18p1 at V=24.9, 2018 June 18.28p1 at V=25.0, and 2018 June 18.37p1. This detection was confirmed by Las Campanas Obs. (2019 July 27.01p1, 2019 July 27.06-13p3, 2019 July 27.21-27p3, 2019 July 27.99p1, 2019 July 28.05-09p2, 2019 July 28.15p1 & 2019 July 28.23p1).

MPEC 2020-B308 - "14:36 UT" - 2020 BY13

K20B13Y 2020 BY13 (small asteroid, Earth MOID=9.0 LD, H=25.4 ~28m) was picked up at 0545 UT on 29 Jan. by PS1, observing it at Jan. 29.24-28p3. This detection was confirmed by Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Jan. 30.08-09p3), Steward Mt. Lemmon Sta. (Jan. 30.17p3 & 31.09-10p4), and the Spacewatch 1.8m telescope (Jan. 30.19p3).

<< DOU on 31 January '20 >> MPEC 2020-B307 - "12:36 UT" - Daily Orbit Update

Observations of risk-listed objects
K20B12Q 2020 BQ12 (small asteroid, arc=3 days, H=24.5 ~43m, NHATS target) from Spacewatch 1.8m (Jan. 31.19-20p3)
K20B12P 2020 BP12 (small asteroid, arc=2 days, H=25.7 ~25m, close passer, NHATS target) from ATLAS Mauna Loa (Jan. 30.48-51p8)
K20B05W 2020 BW5 (small asteroid, arc=9 days, H=26.2 ~19m, close passer, NHATS target) from PS1 (Jan. 30.38-42p3) and the Spacewatch 0.9m telescope (Jan. 31.39-42p3)
K20A01Y 2020 AY1 (small asteroid, arc=25 days, H=25.2 ~31m, close passer, NHATS target) from UH/Tholen NEO Follow-Up 2.24m Telescope (Jan. 30.35p2 at G=22.26-37)
Observations of recently (no longer) risk-listed objects
K20B11N 2020 BN11 (small asteroid, arc=12 days, H=22.6 ~102m) from Tholen 2.24m (Jan. 30.33p1 at G=23.75)
Observations of close-passing objects
K20B12N 2020 BN12 (arc=2 days, H=25.8 ~23m, NHATS target) from ATLAS Mauna Loa (Jan. 30.45-47p3)
K20B10W 2020 BW10 (arc=4 days, H=25.5 ~27m) from ATLAS Mauna Loa (Jan. 30.48-50p4)
K20B10K 2020 BK10 (arc=5 days, H=26.2 ~19m) from Spacewatch 0.9m (Jan. 31.29-32p3)
K20B08W 2020 BW8 (arc=9 days, H=25.9 ~22m, NHATS target) from iTelescope Obs. Siding Spring (Jan. 30.59p1, 30.63p1 & 30.68p1) and Steward Mt. Lemmon Sta. (Jan. 31.28-29p2)
K20B08L 2020 BL8 (arc=7 days, H=25.7 ~25m, NHATS target) from the Catalina Sky Survey (CSS) (Jan. 30.24-25p3) and Spacewatch 1.8m (Jan. 31.22p3)
K20B00S 2020 BS (arc=14 days, H=27.9 ~9m, NHATS target) from Spacewatch 0.9m (Jan. 30.44-49p3)
K20B00D 2020 BD (arc=12 days, H=26.3 ~19m) from Spacewatch 1.8m (Jan. 30.49-50p3 at R=22.3)
Observation campaigns (NHATS targets, radar support)
K20B07N 2020 BN7 (arc=6 days, H=23.6 ~65m, NHATS) from Tholen 2.24m (Jan. 29.67p2)
K20B07K 2020 BK7 (arc=7 days, H=25.8 ~23m, NHATS) from Spacewatch 0.9m (Jan. 30.51-54p3)
K20B05R 2020 BR5 (arc=7 days, H=25.5 ~27m, NHATS) from Steward Mt. Lemmon Sta. (Jan. 30.54p4)
K20B03S 2020 BS3 (arc=12 days, H=26.3 ~19m, NHATS) from Spacewatch 1.8m (Jan. 31.43-44p2 at R=22.7)
K20A00U 2020 AU (arc=31 days, H=25.7 ~25m, NHATS) from Spacewatch 0.9m (Jan. 31.40-43p3 at R=22.3-23.1)
K19P00Y 2019 PY (arc=189 days, H=25.3 ~29m, NHATS) from Spacewatch 0.9m (Jan. 31.21-26p3)
K17A05E 2017 AE5 (arc=5 opp, H=22.3 ~117m, NHATS) from ATLAS Mauna Loa (Jan. 30.56-58p6)
K16AJ3F 2016 AF193 (arc=2 opp, H=21.9 ~141m, NHATS) from Spacewatch 1.8m (Jan. 31.13-15p3)
K11UT2C 2011 UC292 (arc=2 opp, H=22.8 ~93m, NHATS) from Spacewatch 0.9m (Jan. 31.28-31p3)
-- NHATS target table
Observations of small (H>22.0) & smallish (21.7<H<=22.0) asteroids
K20B13D 2020 BD13 (arc=3 days, H=23.3 ~74m) from MLS (Jan. 31.30-31p4)
K20B13B 2020 BB13 (arc=5 days, H=22.7 ~98m) from MLS (Jan. 31.25-27p4)
K20B10X 2020 BX10 (arc=5 days, H=22.6 ~102m) from Steward Mt. Lemmon Sta. (Jan. 31.15p7)
K20B09Y 2020 BY9 (arc=6 days, H=24.7 ~39m) from Steward Mt. Lemmon Sta. (Jan. 31.25p4)
K20B09E 2020 BE9 (arc=8 days, H=23.2 ~78m) from ATLAS Mauna Loa (Jan. 30.30-32p4)
K20B09D 2020 BD9 (arc=5 days, H=24.9 ~35m) from CSS (Jan. 30.35-36p4)
K20B06A 2020 BA6 (arc=8 days, H=24.1 ~51m) from MLS (Jan. 30.36-37p4)
K20B02X 2020 BX2 (arc=10 days, H=25.2 ~31m) from Spacewatch 0.9m (Jan. 30.45-50p3 at R=21.2-22.1)
K20B02T 2020 BT2 (arc=11 days, H=23.6 ~65m) from Spacewatch 1.8m (Jan. 31.17-18p3)
K20B00U 2020 BU (arc=11 days, H=26.0 ~21m) from Steward Mt. Lemmon Sta. (Jan. 30.54p3)
K19Q02F 2019 QF2 (arc=2 opp, H=22.6 ~102m) from PS1 (Jan. 30.38-42p3)
K20B02N 2020 BN2 (arc=12 days, H=21.8 ~148m) from Steward Mt. Lemmon Sta. (Jan. 31.15-17p3)
K19X01N 2019 XN1 (arc=4 opp, H=22.0 ~135m) from PS1 (Jan. 31.39-43p4)
K19X01L 2019 XL1 (arc=58 days, H=22.0 ~135m) from PS1 (Jan. 30.57-60p4)
K03H00M 2003 HM (arc=3 opp, H=21.8 ~148m) from Tholen 2.24m (Jan. 30.66p1 at G=24.51)
Observations of other objects
K20B12X 2020 BX12 (i=40.1°, arc=3 days, H=20.6 ~257m) from LCO Sutherland A (Jan. 30.82p4)
K20B11H 2020 BH11 (Q=4.051 AU, arc=51 days, H=21.4 ~178m) from the Zwicky Transient Facility (ZTF) (Jan. 27.26p1, 27.42-43p2 & 28.33p2)
K20B07Q 2020 BQ7 (arc=9 days, H=19.7 ~389m) from Holmes/CTIO (Jan. 31.11-12p3)
K20B06C 2020 BC6 (arc=13 days, H=20.5 ~269m) from Tholen 2.24m (Jan. 30.47p1 at G=22.76)
K20B05L 2020 BL5 (Q=4.214 AU, arc=10 days, H=20.6 ~257m) from MLS (Jan. 30.44-46p4)
K20B04F 2020 BF4 (arc=11 days, H=20.1 ~323m) from Holmes/CTIO (Jan. 31.09-10p3)
K20B04A 2020 BA4 (arc=9 days, H=20.2 ~309m) from MLS (Jan. 30.29-31p4)
K20B03G 2020 BG3 (Q=4.025 AU, arc=12 days, H=19.2 ~490m) from Steward Mt. Lemmon Sta. (Jan. 31.12-13p4)
K20B02E 2020 BE2 (arc=11 days, H=20.1 ~323m) from CSS (Jan. 30.37-38p4)
K20A02Z 2020 AZ2 (arc=24 days, H=21.2 ~195m) from CSS (Jan. 30.39-41p4)
K19Y04S 2019 YS4 (arc=35 days, H=19.8 ~371m) from PS2 (Jan. 31.38-41p4)
K19X03A 2019 XA3 (Q=4.506 AU, arc=55 days, H=19.0 ~537m) from Steward Mt. Lemmon Sta. (Jan. 30.16-17p3)
K19X02Y 2019 XY2 from Spacewatch 1.8m (Jan. 31.36-41p3)
K19X01G 2019 XG1 (Q=4.163 AU, arc=2 opp, H=19.1 ~513m) from ATLAS Mauna Loa (Jan. 30.45-48p4)
K19W06B 2019 WB6 (arc=66 days, H=20.5 ~269m) from ZTF (Jan. 30.30-31p2 & 30.38p2), CSS (Jan. 30.33-34p4), and PS2 (Jan. 30.39-42p4)
K19W03P 2019 WP3 (Q=4.375 AU, arc=95 days, H=19.6 ~407m) from Spacewatch 0.9m (Jan. 31.15-18p3 at R=22.7-23.0)
K19W03F 2019 WF3 (arc=67 days, H=20.8 ~234m) from Spacewatch 0.9m (Jan. 31.09-13p3)
K19T33V 2019 TV33 (arc=2 opp, H=21.5 ~170m) from PS1 (Jan. 30.28-29p2)
K19T04Z 2019 TZ4 (Q=4.126 AU, arc=114 days, H=19.5 ~426m) from ZTF (Jan. 28.28-30p2, 28.35p1 & 28.41p1)
K19S07C 2019 SC7 (arc=125 days, H=21.5 ~170m) from Spacewatch 1.8m (Jan. 31.22-25p3)
K19Q06R 2019 QR6 (Q=10.376 AU, arc=154 days, H=19.9 ~355m) from PS2 (Jan. 31.38-41p3)
K18P20A 2018 PA20 (arc=2 opp, H=20.0 ~339m) from Spacewatch 0.9m (Jan. 30.52-55p3)
K18B07A 2018 BA7 (arc=3 opp, H=18.7 ~616m) from MLS (Jan. 30.44-46p4)
K18B00P 2018 BP (arc=3 opp, H=20.7 ~245m) from Oukaimeden Obs. (Jan. 30.97-99p4)
K17W28P 2017 WP28 (q=0.234 AU, arc=2 opp, H=20.8 ~234m) from Spacewatch 0.9m (Jan. 31.20-25p3)
K17B31P 2017 BP31 (arc=3 opp, H=19.7 ~389m) from PS1 (Jan. 30.51-55p4)
K16X01H 2016 XH1 (arc=3 opp, H=20.3 ~295m) from Spacewatch 0.9m (Jan. 31.09-13p3 at R=21.8-22.7)
K16AE7X 2016 AX147 (arc=4 opp, H=17.7 ~977m) from CSS (Jan. 30.32-34p3), PS1 (Jan. 30.38-42p4), and Oukaimeden Obs. (Jan. 31.04-06p4)
K15VE2U 2015 VU142 (arc=2 opp, H=19.6 ~407m) from MLS (Jan. 30.49-51p4)
K15HB6U 2015 HU116 (arc=3 opp, H=19.9 ~355m) from PS1 (Jan. 31.28-29p2)
K15DK0E 2015 DE200 (arc=4 opp, H=20.2 ~309m) from SATINO-1 (Jan. 27.01p3) and ATLAS Mauna Loa (Jan. 30.43-45p3)
K14Y43U 2014 YU43 (arc=3 opp, H=19.6 ~407m) from PS1 (Jan. 30.43-47p3)
K14Y34W 2014 YW34 (arc=3 opp, H=21.7 ~155m) from PS1 (Jan. 30.29-32p3)
K14HJ2H 2014 HH192 (arc=3 opp, H=19.1 ~513m) from MLS (Jan. 30.15-16p4)
K14B03G 2014 BG3 (arc=4 opp, H=21.1 ~204m) from Steward Mt. Lemmon Sta. (Jan. 30.50-51p4 at G=21.8-23.2)
K13C89K 2013 CK89 (arc=4 opp, H=18.1 ~812m) from PS1 (Jan. 31.24-26p3)
K12BC4E 2012 BE124 (q=0.229 AU, Q=4.847 AU, arc=3 opp, H=19.4 ~446m) from ATLAS Mauna Loa (Jan. 30.42-44p4)
K12BC4D 2012 BD124 (arc=4 opp, H=19.1 ~513m) from PS1 (Jan. 31.34-37p3)
K11C04T 2011 CT4 (arc=3 opp, H=20.5 ~269m) from ATLAS Haleakala (Jan. 30.36-39p4), Spacewatch 0.9m (Jan. 30.40-44p3), and Foxfire Village Obs. (Jan. 31.08-10p3)
K09A16H 2009 AH16 (arc=8 opp, H=17.6 ~1.02 km) from ATLAS Mauna Loa (Jan. 30.64-65p3)
K08O01X 2008 OX1 (arc=4 opp, H=21.5 ~170m) from CSS (Jan. 30.33-34p3)
K07B29J 2007 BJ29 (q=0.381 AU, arc=3 opp, H=18.8 ~589m) from CSS (Jan. 30.33-34p3)
K06Y01U 2006 YU1 (Q=4.110 AU, arc=2 opp, H=21.0 ~214m) from MLS (Jan. 30.40-42p4)
K06K86Y 2006 KY86 (arc=4 opp, H=19.7 ~389m) from WISE (Jan. 25.33p1, 25.46p2, 25.52p1, 25.59p1, 25.65p1 & 25.78p1) and MLS (Jan. 30.17-18p4)
K05S00Q 2005 SQ (arc=4 opp, H=20.0 ~339m) from PS1 (Jan. 30.40-42p3)
K04X29K 2004 XK29 (arc=3 opp, H=19.7 ~389m) from PS1 (Jan. 31.39-42p4)
K04M00D 2004 MD (arc=5 opp, H=20.1 ~323m) from ATLAS Mauna Loa (Jan. 30.50-51p4)
K04C52H 2004 CH52 (arc=4 opp, H=19.8 ~371m) from ZTF (Jan. 28.30p1, 28.37-44p4, 30.35-36p2, 30.44p1 & 30.49p1), CSS (Jan. 30.41-42p3), and Oukaimeden Obs. (Jan. 31.14-16p4)
K02E02Y 2002 EY2 (arc=5 opp, H=19.4 ~446m) from ATLAS Mauna Loa (Jan. 30.47-49p4)
K00WE8O 2000 WO148 (arc=4 opp, H=20.6 ~257m) from MLS (Jan. 30.49-51p4)
J96A02E 1996 AE2 (i=37.4°, arc=4 opp, H=20.3 ~295m) from ATLAS Mauna Loa (Jan. 30.47-51p8)
p2245 512245 2016 AU8 from ZTF (Jan. 30.30-31p2 & 30.38p2), CSS (Jan. 30.35-36p4), and ATLAS Haleakala (Jan. 30.38-40p4)
p1684 511684 2015 BN509 from PS1 (Jan. 30.29-33p3)
o6459 506459 2002 AL14 from CSS (Jan. 30.54-55p4)
o0094 500094 2012 BC20 from CSS (Jan. 30.39-41p4)
n2143 492143 2013 OE from ATLAS Haleakala (Jan. 30.23-24p3)
m9486 489486 2007 GS3 from MLS (Jan. 30.17-19p4)
m8490 488490 2000 AF205 from ZTF (Jan. 27.25-27p2 & 27.32p2) and CSS (Jan. 30.30-32p2)
m3878 483878 2005 YS165 from WISE (Jan. 24.57p1, 24.90p1, 25.22p1, 25.29p1, 25.48p1, 25.62p1 & 25.88p1) and ATLAS Mauna Loa (Jan. 30.54-58p6)
m0936 480936 2003 QH5 from MLS (Jan. 30.38-40p4)
l4223 474223 2001 CC32 from CSS (Jan. 30.39-40p4)
k7475 467475 2006 RG7 from MLS (Jan. 30.19-21p4)
j8732 458732 2011 MD5 from CSS (Jan. 30.24-25p4) and ATLAS Haleakala (Jan. 30.25-29p4)
j5322 455322 2002 NX18 from PS1 (Jan. 30.34-37p3) and ATLAS Haleakala (Jan. 30.36-39p4)
h9908 439908 2000 XH47 from MLS (Jan. 30.36-37p4)
h8452 438452 2007 AS12 from ZTF (Jan. 28.25-26p2 & 29.23-27p4)
h7316 437316 2013 OS3 from Foxfire Village Obs. (Jan. 31.05-08p3)
g5450 425450 2010 EV45 from PS2 (Jan. 30.54-58p3)
f6591 416591 2004 LC2 from ATLAS Mauna Loa (Jan. 30.48-51p4)
f6231 416231 2003 AJ73 from ATLAS Mauna Loa (Jan. 30.33-36p4)
f5267 415267 2013 BQ45 from PS1 (Jan. 30.44-47p4)
f5027 415027 2011 SG5 from MLS (Jan. 30.23-24p4)
c6298 386298 2008 SR7 from PS1 (Jan. 31.39-42p4)
b4188 374188 2005 AD3 from ZTF (Jan. 27.27p1, 27.32p1 & 28.23-27p2) and CSS (Jan. 30.30-32p4)
a3814 363814 2005 ND7 from PS2 (Jan. 31.38-41p4)
X8347 338347 2002 XG4 from CSS (Jan. 30.21-23p4) and ATLAS Haleakala (Jan. 30.23-26p4)
V1044 311044 2004 BB103 from CSS (Jan. 30.24-25p4)
V0442 310442 2000 CH59 from CSS (Jan. 30.26-28p4)
P7744 257744 2000 AD205 from PS1 (Jan. 30.33-36p3)
O8926 248926 2006 WZ2 from ZTF (Jan. 27.18p1, 27.26p1, 28.22p1 & 28.26p1) and ATLAS Mauna Loa (Jan. 30.41-44p4)
N7805 237805 2002 CF26 from ATLAS Mauna Loa (Jan. 30.24-26p7)
L4088 214088 2004 JN13 from PS2 (Jan. 30.34-38p4 & 31.37-40p4) and ATLAS Mauna Loa (Jan. 30.38-40p4)
K5378 205378 2001 BJ16 from PS1 (Jan. 31.28-32p3)
K3015 203015 1999 YF3 from CSS (Jan. 30.33-34p4) and ATLAS Haleakala (Jan. 30.36-38p4)
I3548 183548 2003 HU42 from CSS (Jan. 30.39-41p4)
G3696 163696 2003 EB50 from ATLAS Mauna Loa (Jan. 30.26-29p6)
G3694 163694 2003 DP13 from Spacewatch 0.9m (Jan. 30.45-51p3)
G2038 162038 1996 DH from ZTF (Jan. 28.32p1, 28.38p1, 30.32p1 & 30.38p1), CSS (Jan. 30.37-38p4), and PS2 (Jan. 30.39-40p2)
F9928 159928 2005 CV69 from CSS (Jan. 30.49p1)
F9533 159533 2001 HH31 from PS1 (Jan. 30.57-61p4)
F9454 159454 2000 DJ8 from ATLAS Haleakala (Jan. 30.28-29p3 & 30.35p1)
F4029 154029 2002 CY46 from ZTF (Jan. 27.52-54p2 & 28.37-38p2)
F3842 153842 2001 XT30 from ZTF (Jan. 28.15-16p2, 29.14p1 & 29.19p1) and CSS (Jan. 30.19-21p4)
E4411 144411 2004 EW9 from MLS (Jan. 30.47-48p4)
E3947 143947 2003 YQ117 from MLS (Jan. 30.29-31p4)
E1498 141498 2002 EZ16 from MLS (Jan. 30.25-27p4)
D8911 138911 2001 AE2 from MLS (Jan. 30.52-53p4)
D8013 138013 2000 CN101 from ZTF (Jan. 30.25-29p4)
D7925 137925 2000 BJ19 from CSS (Jan. 30.24-25p4) and ATLAS Haleakala (Jan. 30.25-28p4)
D7199 137199 1999 KX4 from ATLAS Mauna Loa (Jan. 30.35-37p4) and Foxfire Village Obs. (Jan. 31.05-07p3)
D7170 137170 1999 HF1 from ATLAS Haleakala (Jan. 30.60-62p4)
D7120 137120 1999 BJ8 from CSS (Jan. 30.54-55p3)
D7099 137099 1998 YW3 from ATLAS Mauna Loa (Jan. 30.55-57p4)
D6993 136993 1998 ST49 from ATLAS Mauna Loa (Jan. 30.60-62p4)
D6795 136795 1997 BQ from ATLAS Mauna Loa (Jan. 30.32-34p4)
D6582 136582 1992 BA from CSS (Jan. 30.32-34p4) and PS1 (Jan. 30.38-42p4)
A6589 106589 2000 WN107 from CSS (Jan. 30.18-19p3)
A6538 106538 2000 WK63 from CSS (Jan. 30.19-21p4) and Geyserland Obs. (Jan. 30.39-43p4)
A3067 103067 1999 XA143 from ATLAS Mauna Loa (Jan. 30.42-44p3)
99248 99248 2001 KY66 from ZTF (Jan. 29.15p1, 29.20p1, 30.15p1 & 30.22p1)
96315 96315 1997 AP10 from MLS (Jan. 30.47-48p4)
90075 90075 2002 VU94 from CSS (Jan. 30.30-32p4) and ATLAS Haleakala (Jan. 30.36-38p4)
89830 89830 2002 CE from ATLAS Mauna Loa (Jan. 30.62-64p4)
86450 86450 2000 CK33 from ATLAS Haleakala (Jan. 30.27-30p3)
85628 85628 1998 KV2 from WISE (Jan. 25.95p1, 26.21p1, 26.34p1, 26.47p1, 26.60p1, 26.73p1, 26.86p1, 26.93p1, 26.99p1, 27.06p1, 27.12p1, 27.19p1, 27.32p1, 27.39p1, 27.45p2, 27.52p1, 27.58p1, 27.65p1, 27.71p1, 27.91p1, 27.97p1, 28.11p1, 28.24p1, 28.37p1, 28.50p1 & 28.89p1)
66251 66251 1999 GJ2 from MLS (Jan. 30.49-51p4)
65690 65690 1991 DG from MLS (Jan. 30.35-37p4)
54686 54686 2001 DU8 from CSS (Jan. 30.45-47p4) and ATLAS Haleakala (Jan. 30.46-48p4)
54071 54071 2000 GQ146 from ATLAS Haleakala (Jan. 30.60-62p4)
52768 52768 1998 OR2 from ATLAS Mauna Loa (Jan. 30.44-46p4)
35107 35107 1991 VH from CSS (Jan. 30.39-40p4) and ATLAS Haleakala (Jan. 30.42-45p4)
34613 34613 2000 UR13 from ZTF (Jan. 30.28-35p4)
20255 20255 1998 FX2 from PS1 (Jan. 31.29-32p3)
18172 18172 2000 QL7 from ATLAS Mauna Loa (Jan. 30.39-41p4)
15745 15745 Yuliya (1991 PM5) from PS2 (Jan. 30.43-47p4)
11405 11405 1999 CV3 from CSS (Jan. 30.26-28p4)
11066 11066 Sigurd (1992 CC1) from CSS (Jan. 30.45-47p4) and PS2 (Jan. 30.55p1 & 30.59p1)
10115 10115 1992 SK from WISE (Jan. 26.15p1, 26.28p1, 26.41p2, 26.54p1, 26.67p1, 26.93p1, 27.06p1, 27.32p1, 27.45p1, 27.85p1, 27.98p1, 28.11p1, 28.24p1, 28.30p1, 28.37p1, 28.43p1, 28.50p1, 28.57p1, 28.63p1, 28.70p1, 28.76p1, 28.83p1, 28.89p1, 28.96p1, 29.02p2, 29.09p1, 29.15p1, 29.22p1 & 29.28p1), CSS (Jan. 30.54-55p4), and ATLAS Haleakala (Jan. 30.59-61p4)
08566 8566 1996 EN from MLS (Jan. 30.36-37p4)
07088 7088 Ishtar (1992 AA) from CSS (Jan. 30.47-49p4) and ATLAS Haleakala (Jan. 30.56-58p4)
06455 6455 1992 HE from ATLAS Mauna Loa (Jan. 30.22-24p4)
05693 5693 1993 EA from CSS (Jan. 30.41-42p4)
05646 5646 1990 TR from PS2 (Jan. 30.44-48p3)
05626 5626 1991 FE from ATLAS Haleakala (Jan. 30.36-38p4) and PS1 (Jan. 30.38-42p4)
04954 4954 Eric (1990 SQ) from MLS (Jan. 30.51-53p4)
04055 4055 Magellan (1985 DO2) from ATLAS Haleakala (Jan. 30.59-61p4)
02329 2329 Orthos (1976 WA) from PS2 (Jan. 30.50-53p3)
02059 2059 Baboquivari (1963 UA) from CSS (Jan. 30.19-21p4)
01981 1981 Midas (1973 EA) from ATLAS Mauna Loa (Jan. 30.40-47p6)
01866 1866 Sisyphus (1972 XA) from ATLAS Mauna Loa (Jan. 30.24-26p4)
01627 1627 Ivar (1929 SH) from ZTF (Jan. 28.32-36p2), ATLAS Haleakala (Jan. 30.36-39p4), and PS1 (Jan. 30.38-42p3)

MPEC 2020-B306 - "11:43 UT" - 2020 BX13

K20B13X 2020 BX13 (small asteroid, H=23.1 ~81m) was picked up at 0717 UT on 26 Jan. by PS1, observing it at Jan. 2.45-49p4 and 26.30-33p3. This detection was confirmed by PS2 (Dec. 8.60-61p2 & 30.45-50p3), Spacewatch 1.8m (Jan. 27.16-18p3), and R. Wainscoat on Mauna Kea (Jan. 31.30p3).

MPEC 2020-B305 - "11:39 UT" - 2020 BW13

K20B13W 2020 BW13 (risk listed, Earth MOID=2.3 LD, H=27.3 ~12m, close passer) was picked up at 1131 UT on 29 Jan. by PS2, observing it at Jan. 23.54-57p4 at G=21.0-22.6 and 29.48-50p3 at w=21.52-83. This detection was confirmed by R. Wainscoat/Mauna Kea (Jan. 30.50-51p3) and Holmes/CTIO (Jan. 31.27-28p2).

MPEC 2020-B304 - "01:25 UT" - 2020 BV13

K20B13V 2020 BV13 (Q=4.864 AU, H=21.4 ~178m) was picked up at 0720 UT on 27 Jan. by PS1, observing it at Jan. 27.31-35p4. This detection was confirmed by MRO (Jan. 27.46-48p4) and R. Wainscoat/Mauna Kea (Jan. 30.32p3).

MPEC 2020-B303 - "01:11 UT" - 2020 BU13

K20B13U 2020 BU13 (risk listed, q=0.073 AU, Q=4.862 AU, H=21.1 ~204m) was picked up at 0718 UT on 25 Jan. by PS1, observing it at Jan. 25.30-34p4. This detection was confirmed by Spacewatch 1.8m (Jan. 26.12-14p3 at R=21.1-6, 28.18-20p2 & 29.21-23p3 at R=21.9-22.3), Steward Mt. Lemmon Sta. (Jan. 26.13-14p4 at G=21.8-22.3), R. Wainscoat/Mauna Kea (Jan. 26.25-30p5 at G=20.76-21.72 & 29.26-27p7 at G=21.63-22.07), PS2 (Jan. 26.34-36p3), LCO Sutherland B (Jan. 26.85-86p3), and Astronomical Research Obs. Westfield (Jan. 27.09-11p4 at V=21.8-22.1).

MPEC 2020-B302 - "00:55 UT" - 2020 BT13

K20B13T 2020 BT13 (Q=4.438 AU, H=21.1 ~204m) was picked up at 0921 UT on 29 Jan. by PS2, observing it at Jan. 29.39-42p3. This detection was confirmed by PS1 (Jan. 18.44-47p4), Steward Mt. Lemmon Sta. (Jan. 30.24-28p4), and MLS (Jan. 30.30-31p4).

MPEC 2020-B301 - "00:48 UT" - 2020 BR13

K20B13R 2020 BR13 (H=20.7 ~245m) was picked up at 0943 UT on 25 Jan. by PS1, observing it at Jan. 25.40-44p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Jan. 26.26p4 at G=21.0 & 30.27-28p4 at G=20.9-22.9) and PS2 (Jan. 29.40-43p3).

MPEC 2020-B300 - "00:46 UT" - 2020 BQ13

K20B13Q 2020 BQ13 (i=43.7°, H=20.1 ~323m) was picked up at 1248 UT on 25 Jan. by MLS, observing it at Jan. 25.53-56p6 at G=20.9-22.2, 26.49-51p4 at G=21.3-9, 28.51p4 at G=21.9-22.4, and 30.49p3 at G=21.8-22.0.

MPEC 2020-B299 - "00:45 UT" - 2020 BP13

K20B13P 2020 BP13 (Earth MOID=5.6 LD, H=21.2 ~195m) was picked up at 0532 UT on 28 Jan. by MLS, observing it at Jan. 28.23-25p4. This detection was confirmed by Steward Mt. Lemmon Sta. (Jan. 28.31-32p4, 29.14-15p3 & 30.20-21p4) and Holmes/CTIO (Jan. 30.12-13p3).

MPEC 2020-B298 - "00:44 UT" - 2020 BO13

K20B13O 2020 BO13 (H=21.7 ~155m) was picked up at 1124 UT on 26 Jan. by PS1, observing it at Jan. 26.48-50p3 at w=22.34-60, 27.35-37p2 at G=22.0-22.2, and 28.39-42p8 at w=22.4-8. This detection was confirmed by ARO Westfield (Jan. 27.17-18p4 at V=22.0-22.1) and Spacewatch 1.8m (Jan. 27.19-23p3 at R=22.4-9).

MPEC 2020-B297 - "00:15 UT" - 2020 BN13

K20B13N 2020 BN13 (H=26.1 ~20m, NHATS) was picked up at 0447 UT on 29 Jan. by MLS, observing it at Jan. 29.20-22p4. This detection was confirmed by MRO (Jan. 29.25-28p4), Steward Mt. Lemmon Sta. (Jan. 29.28-29p2), Holmes/CTIO (Jan. 30.08-10p3), and Spacewatch 1.8m (Jan. 30.20-22p3).

MPEC 2020-B296 - "00:14 UT" - 2020 BM13

K20B13M 2020 BM13 (Earth MOID=4.7 LD, H=26.4 ~18m) was picked up at 0940 UT on 29 Jan. by MLS, observing it at Jan. 29.40-41p3. This detection was confirmed by MRO (Jan. 29.44-46p4 at G=21.2-22.1), Steward Mt. Lemmon Sta. (Jan. 29.47-48p4), PS1 (Jan. 29.62p1), and Visnjan Obs. (Jan. 30.06p2).

MPEC 2020-B295 - "00:09 UT" - 2020 BL13

K20B13L 2020 BL13 (Earth MOID=4.7 LD, H=26.3 ~19m, NHATS target) was picked up at 1106 UT on 30 Jan. by ATLAS Mauna Loa, observing it at Jan. 30.46-49p4. This detection was confirmed by PS1 (Jan. 29.48-52p4), Schwarzschild Obs. (Jan. 30.73p3), and Visnjan Obs. (Jan. 30.81p6).

MPEC 2020-B294 - "00:07 UT" - 2020 BK13

K20B13K 2020 BK13 (Earth MOID=0.3 LD, H=28.5 ~7m, NHATS target) was picked up at 0836 UT on 29 Jan. by MLS, observing it at Jan. 29.36-37p4. This detection was confirmed by MRO (Jan. 29.39-41p4), Steward Mt. Lemmon Sta. (Jan. 29.41p4 & 30.29-30p3), Visnjan Obs. (Jan. 29.98p3), and San Marcello Pistoiese Obs. (Jan. 29.99-01p2).

MPEC 2020-B293 - "00:04 UT" - 2020 BJ13

K20B13J 2020 BJ13 (Earth MOID=4.7 LD, H=26.7 ~15m, NHATS target) was picked up at 0834 UT on 29 Jan. by MLS, observing it at Jan. 29.36-37p4. This detection was confirmed by MRO (Jan. 29.38-40p4), Steward Mt. Lemmon Sta. (Jan. 29.41-42p4 & 30.39p4), San Marcello Pistoiese Obs. (Jan. 29.97-98p2), Visnjan Obs. (Jan. 30.01-02p3), and PS2 (Jan. 30.50-52p2).

MPEC 2020-B292 - "00:03 UT" - 2020 BH13

K20B13H 2020 BH13 (Q=4.124 AU, H=19.9 ~355m) was picked up at 0927 UT on 28 Jan. by PS1, observing it at Jan. 26.42-46p4 at G=22.1-23.3, 26.51p1 at G=22.6, and 28.39-43p3 at w=22.28-51. This detection was confirmed by R. Wainscoat/Mauna Kea (Jan. 30.33p3 at G=22.48-66).

MPEC 2020-B291 - "00:00 UT" - 2020 BG13

K20B13G 2020 BG13 (Earth MOID=1.9 LD, H=27.8 ~9m) was picked up at 0706 UT on 29 Jan. by CSS, observing it at Jan. 29.30-31p3. This detection was confirmed by MRO (Jan. 29.35-37p4), Steward Mt. Lemmon Sta. (Jan. 29.36p4), Sormano Obs. (Jan. 29.87p3), GiaGa Obs. (Jan. 29.87-89p3), Schwarzschild Obs. (Jan. 29.87p3), San Marcello Pistoiese Obs. (Jan. 29.88-89p5), Pascoli Obs. (Jan. 29.91-92p3), SATINO-1 (Jan. 29.97-99p3), Visnjan Obs. (Jan. 29.99p4), and M57 Obs. (Jan. 30.04-06p3).

Observers on 31 January '20

A total of 37 observers appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2020-B298 & 2020-B303 -- 2020 BU13, 2020 BO13
`T05`	ATLAS Haleakala in Hawaii, 20 in MPEC 2020-B307 -- 2011 CT4, 90075, 86450, 54686, 54071, 512245, 492143, 458732, 455322, 35107, 338347, 203015, 159454, 137925, 137170, 10115, 7088, 5626, 4055, 1627
`T08`	ATLAS Mauna Loa in Hawaii, 31 in MPECs 2020-B295 & 2020-B307 -- 2020 BW10, 2020 BP12, 2020 BN12, 2020 BL13, 2020 BE9, 2019 XG1, 2017 AE5, 2015 DE200, 2012 BE124, 2009 AH16, 2004 MD, 2002 EY2, 1996 AE2, 89830, 52768, 483878, 416591, 416231, 248926, 237805, 214088, 18172, 163696, 137199, 137099, 136993, 136795, 103067, 6455, 1981, 1866
`Z84`	Calar Alto Schmidt in Spain, 1 in MPEC 2020-B313 -- 2020 BZ13
`703`	Catalina Sky Survey (CSS) in Arizona, 39 in MPECs 2020-B291 & 2020-B307 -- 2020 BL8, 2020 BG13, 2020 BE2, 2020 BD9, 2020 AZ2, 2019 WB6, 2016 AX147, 2008 OX1, 2007 BJ29, 2004 CH52, 90075, 54686, 512245, 506459, 500094, 488490, 474223, 458732, 374188, 35107, 338347, 311044, 310442, 203015, 183548, 162038, 159928, 153842, 137925, 137120, 136582, 11405, 11066, 106589, 106538, 10115, 7088, 5693, 2059
`807\|`	Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPECs 2020-B297, 2020-B299, 2020-B305, 2020-B307 & 2020-B308 -- 2020 BY13, 2020 BW13, 2020 BQ7, 2020 BP13, 2020 BN13, 2020 BF4
`W84`	DECam in Chile, 1 in MPEC 2020-B309 -- 2018 MF13
`W46`	Foxfire Village Obs., 3 in MPEC 2020-B307 -- 2011 CT4, 437316, 137199
`E89`	Geyserland Obs. in New Zealand, 1 in MPEC 2020-B307 -- 106538
`203`	GiaGa Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
`J95`	Great Shefford Obs. in England, 1 in MPEC 2020-B313 -- 2020 BZ13
`Q62`	iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2020-B307 -- 2020 BW8
`304`	Las Campanas Obs. in Chile, 1 in MPEC 2020-B309 -- 2018 MF13
`K91`	LCO Sutherland A in South Africa, 1 in MPEC 2020-B307 -- 2020 BX12
`K92`	LCO Sutherland B in South Africa, 1 in MPEC 2020-B303 -- 2020 BU13
`K38`	M57 Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2020-B291, 2020-B293, 2020-B294, 2020-B296, 2020-B297, 2020-B304 & 2020-B311 -- 2020 BV13, 2020 BN13, 2020 BM13, 2020 BK13, 2020 BJ13, 2020 BG13, 2020 BA14
`568^`	R. Wainscoat on Mauna Kea in Hawaii, 5 in MPECs 2020-B292, 2020-B303, 2020-B304, 2020-B305 & 2020-B306 -- 2020 BX13, 2020 BW13, 2020 BV13, 2020 BU13, 2020 BH13
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 35 in MPECs 2020-B293, 2020-B294, 2020-B296, 2020-B297, 2020-B299, 2020-B300, 2020-B302, 2020-B307, 2020-B311, 2020-B312 & 2020-B313 -- 2020 BZ13, 2020 BT13, 2020 BQ13, 2020 BP13, 2020 BN13, 2020 BM13, 2020 BL5, 2020 BK13, 2020 BJ13, 2020 BD13, 2020 BB13, 2020 BA6, 2020 BA4, 2020 BA14, 2018 BA7, 2017 DU15, 2015 VU142, 2014 HH192, 2006 YU1, 2006 KY86, 2000 WO148, 96315, 66251, 65690, 489486, 480936, 467475, 439908, 415027, 144411, 143947, 141498, 138911, 8566, 4954
`Z80`	Northolt Branch Obs. in England, 1 in MPEC 2020-B313 -- 2020 BZ13
`J43`	Oukaimeden Obs. in Morocco, 3 in MPEC 2020-B307 -- 2018 BP, 2016 AX147, 2004 CH52
`F51`	Pan-STARRS 1 (PS1) in Hawaii, 36 in MPECs 2020-B292, 2020-B295, 2020-B296, 2020-B298, 2020-B301, 2020-B302, 2020-B303, 2020-B304, 2020-B306, 2020-B307, 2020-B308 & 2020-B312 -- 2020 BY13, 2020 BX13, 2020 BW5, 2020 BV13, 2020 BU13, 2020 BT13, 2020 BR13, 2020 BO13, 2020 BM13, 2020 BL13, 2020 BH13, 2019 XN1, 2019 XL1, 2019 TV33, 2019 QF2, 2017 DU15, 2017 BP31, 2016 AX147, 2015 HU116, 2014 YW34, 2014 YU43, 2013 CK89, 2012 BD124, 2005 SQ, 2004 XK29, 511684, 455322, 415267, 386298, 257744, 205378, 20255, 159533, 136582, 5626, 1627
`F52`	Pan-STARRS 2 (PS2) in Hawaii, 18 in MPECs 2020-B293, 2020-B301, 2020-B302, 2020-B303, 2020-B305, 2020-B306, 2020-B307 & 2020-B311 -- 2020 BX13, 2020 BW13, 2020 BU13, 2020 BT13, 2020 BR13, 2020 BJ13, 2020 BA14, 2019 YS4, 2019 WB6, 2019 QR6, 425450, 363814, 214088, 162038, 15745, 11066, 5646, 2329
`K63`	Pascoli Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
`104`	San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2020-B291, 2020-B293 & 2020-B294 -- 2020 BK13, 2020 BJ13, 2020 BG13
`C95`	SATINO-1 in France, 2 in MPECs 2020-B291 & 2020-B307 -- 2020 BG13, 2015 DE200
`033`	Schwarzschild Obs. in Germany, 2 in MPECs 2020-B291 & 2020-B295 -- 2020 BL13, 2020 BG13
`587`	Sormano Obs. in Italy, 1 in MPEC 2020-B291 -- 2020 BG13
`691`	Spacewatch 0.9m telescope in Arizona, 15 in MPEC 2020-B307 -- 2020 BX2, 2020 BW5, 2020 BS, 2020 BK7, 2020 BK10, 2020 AU, 2019 WP3, 2019 WF3, 2019 PY, 2018 PA20, 2017 WP28, 2016 XH1, 2011 UC292, 2011 CT4, 163694
`291`	Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2020-B297, 2020-B298, 2020-B303, 2020-B306, 2020-B307 & 2020-B308 -- 2020 BY13, 2020 BX13, 2020 BU13, 2020 BT2, 2020 BS3, 2020 BQ12, 2020 BO13, 2020 BN13, 2020 BL8, 2020 BD, 2019 XY2, 2019 SC7, 2016 AF193
`I52`	Steward Obs. Mt. Lemmon Station in Arizona, 21 in MPECs 2020-B291, 2020-B293, 2020-B294, 2020-B296, 2020-B297, 2020-B299, 2020-B301, 2020-B302, 2020-B303, 2020-B307, 2020-B308, 2020-B312 & 2020-B313 -- 2020 BZ13, 2020 BY9, 2020 BY13, 2020 BX10, 2020 BW8, 2020 BU13, 2020 BU, 2020 BT13, 2020 BR5, 2020 BR13, 2020 BP13, 2020 BN2, 2020 BN13, 2020 BM13, 2020 BK13, 2020 BJ13, 2020 BG3, 2020 BG13, 2019 XA3, 2017 DU15, 2014 BG3
`T12`	UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 5 in MPEC 2020-B307 -- 2020 BN7, 2020 BN11, 2020 BC6, 2020 AY1, 2003 HM
`T14`	UH/Tholen NEO Follow-Up CFH Telescope in Hawaii, 1 in MPEC 2020-B310 -- 2016 CW137
`L01`	Visnjan Obs., 5 in MPECs 2020-B291, 2020-B293, 2020-B294, 2020-B295 & 2020-B296 -- 2020 BM13, 2020 BL13, 2020 BK13, 2020 BJ13, 2020 BG13
`C51`	WISE in Earth polar orbit, 4 in MPEC 2020-B307 -- 2006 KY86, 85628, 483878, 10115
`C42`	Xingming Obs. in China, 1 in MPEC 2020-B313 -- 2020 BZ13
`I41`	Zwicky Transient Facility (ZTF) in southern California, 16 in MPEC 2020-B307 -- 2020 BH11, 2019 WB6, 2019 TZ4, 2004 CH52, 99248, 512245, 488490, 438452, 374188, 34613, 248926, 162038, 154029, 153842, 138013, 1627

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

Impact Risk Monitoring on 31 January '20

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2358 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 BW13	JPL Sentry	1650	2084-2090	2	3.9764e-07	-7.78	-7.85	0	JPL: Computed at 05:03 today Pacific time based on 12 observations spanning 7.7390 days (2020-Jan-23.537363 to 2020-Jan-31.27633). Diameter approximately 0.013 km. from weighted mean H=27.13.
2020 BW13	NEODyS	1650	2068-2101	5	1.81e-07	-8.14	-8.19	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2020-01-23.538 to 2020-01-31.277."

2020 BU13	NEODyS	1650	2049-2100	2	5.23e-10	-7.03	-7.06	0	NEODyS: "Based on 38 optical observations (of which 1 are rejected as outliers) from 2020-01-25.305 to 2020-01-29.268."
2020 BU13	JPL Sentry	0255	2087-2118	5	6.57057e-08	-4.98	-5.12	0	JPL: Computed at 18:33 Jan. 30th Pacific time based on 37 observations spanning 3.9629 days (2020-Jan-25.304418 to 2020-Jan-29.267323). Diameter approximately 0.190 km. from weighted mean H=21.27.

2020 BA13	NEODyS	1650	2068-2105	18	3.15e-06	-7.51	-8.06	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2020-01-28.326 to 2020-01-30.028."

2020 BQ12	JPL Sentry	1650	2093-2093	2	5.9414e-08	-7.16	-7.18	0	JPL: Computed at 08:07 today Pacific time based on 32 observations spanning 2.9688 days (2020-Jan-28.235094 to 2020-Jan-31.20387). Diameter approximately 0.048 km. from weighted mean H=24.25.

2020 BP12	JPL Sentry	1650	R E M O V E D						JPL: Risk listing removed at 1608 UTC today

2020 BW5	JPL Sentry	1650	2046-2110	10	2.030802e-05	-5.28	-5.34	0	JPL: Computed at 07:48 today Pacific time based on 41 observations spanning 8.9004 days (2020-Jan-22.516545 to 2020-Jan-31.41698). Diameter approximately 0.017 km. from weighted mean H=26.46.

2020 AY1	JPL Sentry	1650	R E M O V E D						JPL: Risk listing removed at 1551 UTC today

2019 BE5	NEODyS	1650	R E M O V E D						-

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 31 January '20

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

2130	Grabbed MPEC 2020-B313 - 2020 BZ13 - see above
2010	Generated Traffic Report
1914	Grabbed MPEC 2020-B312 - 2017 DU15 - see above
1650	Noted that NEODyS has removed 2019 BE5 as an impact risk - see above Noted that JPL Sentry has removed 2020 AY1 as an impact risk - see above Noted that NEODyS has posted 2020 BA13 as an impact risk - see above Noted that JPL Sentry has removed 2020 BP12 as an impact risk - see above Noted that JPL Sentry has updated its 2020 BQ12 risk assessment - see above Noted that NEODyS has posted 2020 BU13 as an impact risk - see above Noted that JPL Sentry has posted 2020 BW13 as an impact risk - see above Noted that NEODyS has posted 2020 BW13 as an impact risk - see above Noted that JPL Sentry has updated its 2020 BW5 risk assessment - see above Grabbed MPEC 2020-B305 - 2020 BW13 - see above Grabbed MPEC 2020-B306 - 2020 BX13 - see above Grabbed MPEC 2020-B307 - Daily Orbit Update - see above Grabbed MPEC 2020-B308 - 2020 BY13 - see above Grabbed MPEC 2020-B309 - 2018 MF13 - see above Grabbed MPEC 2020-B310 - 2016 CW137 - see above Grabbed MPEC 2020-B311 - 2020 BA14 - see above
0255	Noted that JPL Sentry has posted 2020 BU13 as an impact risk - see above
0130	Grabbed MPEC 2020-B304 - 2020 BV13 - see above
0115	Grabbed MPEC 2020-B303 - 2020 BU13 - see above
0101	Grabbed MPEC 2020-B300 - 2020 BQ13 - see above Grabbed MPEC 2020-B301 - 2020 BR13 - see above Grabbed MPEC 2020-B302 - 2020 BT13 - see above
0046	Grabbed MPEC 2020-B298 - 2020 BO13 - see above Grabbed MPEC 2020-B299 - 2020 BP13 - see above
0030	Grabbed MPEC 2020-B294 - 2020 BK13 - see above Grabbed MPEC 2020-B295 - 2020 BL13 - see above Grabbed MPEC 2020-B296 - 2020 BM13 - see above Grabbed MPEC 2020-B297 - 2020 BN13 - see above
0008	Grabbed MPEC 2020-B291 - 2020 BG13 - see above Grabbed MPEC 2020-B292 - 2020 BH13 - see above Grabbed MPEC 2020-B293 - 2020 BJ13 - see above

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