Contents on 2 April '18
- Traffic Report -- five objects
- IAU Minor Planet Center
- Observers -- 24 observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 929 risk-listed objects, 43 have had news in the last 31 days. Updated at 1549 UTC on 2 April.
- 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)
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 2 April '18
Five objects reported inside ten LD
Five asteroidal objects are reported within ten lunar distances (LD) of our home world today. Nearest may be 2004 FG29, which is calculated to come its closest to Earth on this passage -- 4.0 LD at 1344 UTC, but with an uncertainty of plus-or-minus 1.03 hours.
|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|
|0.39 LD March 30||2018 FK5||7 m||6.21 to 8.75 LD||March 26 - tomorrow||intruder, risk|
|4.0 LD today*||2004 FG29||21 m||4.0 LD||March 30 - April 5||EPU +/- 1.03 hours*, Earth closest at 1344 UTC|
|4.88 LD March 29||2018 FB||54 m||7.65 to 9.18 LD||March 25 - tomorrow||DOU|
|6.23 LD yesterday||2018 EM4||30 m||6.32 to 6.69 LD||March 26 - April 6||NHATS target|
|7.69 LD March 28||2018 FO4||11 m||9.64 to 10.54 LD||March 24 - today||NHATS target, exits ten LD|
This report was updated at 2122 UTC with new discovery 2018 FP5 (MPEC), which flew past us at 3.03 LD on March 24th. Your first neighborhood flying rocks traffic report was generated at 1922 UTC with follow-up in today's DOU MPEC for outbound 2018 FB and approaching 2018 EJ4.
|Approaching Traffic - sorted by 10-LD bubble entry date|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|9.73 LD April 5||2018 FW4||33 m||11.17 from 12.67 LD||April 4 - 5|
|9.24 LD April 14||2014 UR||16 m||14.51 from 15.27 LD||April 10 - 18||NHATS target|
|6.2 LD May 8*||2016 JQ5||8 m||91.2 from 94.2 LD||May 4 - 11||EPU +/- 14.00 hours*|
|9.65 LD May 7||1999 FN19||112 m||43.29 from 44.45 LD||May 5 - 9||radar/NHATS target|
|6.48 LD May 9||388945 2008 TZ3||282 m||80.44 from 82.97 LD||May 5 - 13|
|9.50 LD May 29||68347 2001 KB67||371 m||206.95 from 212.04 LD||May 28 - 30||radar target|
|5.6 LD June 10*||2018 EJ4||181 m||89.8 from 91.1 LD||June 4 - 16||EPU +/- 45 mins.*, radar/NHATS target - DOU|
|8.96 LD June 11||2015 DP155||162 m||57.36 from 58.06 LD||June 6 - 15||NHATS target|
|* 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 2 April '18
The MPC's NEO Confirmation Page has 9 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nine objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of fourteen 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 2 April '18
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been fourteen MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2018-G02 time-stamped "12:01 UT" - Daily Orbit Update - see below
- MPEC 2018-G03 time-stamped "17:08 UT" - 2014 FO69 - see below
- MPEC 2018-G04 time-stamped "17:09 UT" - 2014 FD70 - see below
- MPEC 2018-G05 time-stamped "17:42 UT" - 2016 TS97 - see below
- MPEC 2018-G06 time-stamped "17:45 UT" - 2017 DM121 - see below
- MPEC 2018-G07 time-stamped "17:47 UT" - 2017 DN121 - see below
- MPEC 2018-G08 time-stamped "17:50 UT" - 2017 DO121 - see below
- MPEC 2018-G09 time-stamped "17:52 UT" - 2017 DP121 - see below
- MPEC 2018-G10 time-stamped "17:55 UT" - 2017 FO161 - see below
- MPEC 2018-G11 time-stamped "17:57 UT" - 2017 FP161 - see below
- MPEC 2018-G12 time-stamped "17:59 UT" - 2017 FQ161 - see below
- MPEC 2018-G13 time-stamped "19:21 UT" - 2018 FO5 - see below
- MPEC 2018-G14 time-stamped "19:24 UT" - 2018 FP5 - see below
- MPEC 2018-G15 time-stamped "19:27 UT" - 2018 FQ5
MPEC 2018-G15 - "19:27 UT" - 2018 FQ5
- K18F05Q 2018 FQ5 (H=18.4 ~708m) was picked up at 0823 UT on 28 March by the Mt. Lemmon Survey (MLS), observing it at March 28.35-37p8. This detection was confirmed by Steward Obs. Mt. Lemmon Station (March 28.50p4, 29.33-35p4 & 29.49-51p4), JAXA Space Tracking & Communications Center (JAXA STCC) (March 28.65-66p4), Muensterschwarzach Obs. (March 29.93-94p3), Steven M. Tilley via iTelescope Obs. Siding Spring (March 30.64-66p3 & 31.67-69p3), and Astronomical Research Obs. Westfield (March 31.30p3).
MPEC 2018-G14 - "19:24 UT" - 2018 FP5
- K18F05P 2018 FP5 (Earth MOID=2.8 LD, H=25.7 ~25m) was picked up at 0651 UT on 27 March by the Catalina Sky Survey (CSS), observing it at March 27.29-30p3. This detection was confirmed by Steward Mt. Lemmon Sta. (March 27.42p4 & 28.26p4), Arcadia Obs. (March 27.57-59p3), Moriyama Obs. (March 27.57-59p3), and Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (March 28.21-23p3 & April 1.02-03p3).
MPEC 2018-G13 - "19:21 UT" - 2018 FO5
- K18F05O 2018 FO5 (Earth MOID=0.9 LD, H=20.5 ~269m) was picked up at 0526 UT on 21 March by MLS, observing it at March 21.23-24p4. This detection was confirmed by Magdalena Ridge Obs. (MRO) (March 21.29-31p4), Steward Mt. Lemmon Sta. (March 21.32-33p4 at G=21.0-22.1), ARO Westfield (March 22.17-18p2), the Catalina Sky Survey Kuiper Telescope (CSS-Kuiper) (March 22.18p4), and Holmes/CTIO (March 25.99-01p3 & 31.99-01p3).
MPEC 2018-G12 - "17:59 UT" - 2017 FQ161
- K17FG1Q 2017 FQ161 (KBO, q=35.882 AU, Q=57.689 AU, H=6.2 ~195 km) was picked up at 0342 UT on 26 March 2017 by Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO), observing it at 2017 March 26.15p1 at r=23.7 and 2017 March 26.26p1 at r=23.7. This detection was confirmed by Discovery Channel Telescope (DCT) (2017 April 20.19p1 & 2017 April 20.27p1) and Las Campanas Obs. (2017 April 24.05p1 at r=23.5, 2017 April 25.09p1, March 11.22p1 at r=23.6, 11.29p1, 12.20p1 & 12.28p1).
MPEC 2018-G11 - "17:57 UT" - 2017 FP161
- K17FG1P 2017 FP161 (q=40.883 AU, Q=55.100 AU, H=7.1 ~129 km) was picked up at 0617 UT on 23 March 2017 by Sheppard/CTIO, observing it at 2017 March 23.26p1 at r=24.3 and 2017 March 23.32p1 at r=24.2. This detection was confirmed by DCT (2017 April 20.21p1 & 2017 April 20.29p1) and Las Campanas Obs. (2017 April 24.29p1, 2017 April 25.28p1, March 11.37-40p2 at r=24.2 & 12.37-39p2).
MPEC 2018-G10 - "17:55 UT" - 2017 FO161
- K17FG1O 2017 FO161 (i=54.1°, q=33.136 AU, Q=93.899 AU, H=5.2 ~309 km) was picked up at 0317 UT on 23 March 2017 by Sheppard/CTIO, observing it at 2017 March 23.14p1 at r=24.1, 2017 March 23.20p1, and 2017 March 24.14p1. This detection was confirmed by DCT (2017 May 20.18-20p2, 2017 May 20.24-27p2, March 7.25p1 & 7.30p1) and Las Campanas Obs. (March 12.23p1 at r=24.0 & 12.30p1).
MPEC 2018-G09 - "17:52 UT" - 2017 DP121
- K17DC1P 2017 DP121 (q=40.520 AU, Q=60.447 AU, H=7.2 ~123 km) was picked up at 0908 UT on 24 Feb. 2017 by Scott Sheppard on Mauna Kea, observing it at 2017 Feb. 24.38p1 at r=24.9 and 2017 Feb. 24.58p1 at r=24.9. This detection was confirmed by Las Campanas Obs. (2017 March 24.13p1, 2017 March 24.20p1, March 11.20p1 at r=24.8, 11.27p1, 12.18p1 & 12.26p1) and DCT (2017 April 20.20p1 & 2017 April 20.28p1).
MPEC 2018-G08 - "17:50 UT" - 2017 DO121
- K17DC1O 2017 DO121 (q=26.696 AU, Q=344.408 AU, H=7.6 ~102 km) was picked up at 0753 UT on 24 Feb. 2017 by Sheppard/Mauna Kea, observing it at 2017 Feb. 24.33p1 at r=25.5 and 2017 Feb. 24.50p1 at r=25.5. This detection was confirmed by Las Campanas Obs. (2017 April 22.04p1, 2017 April 23.04p1, 2017 April 24.03p1 at r=25.6, March 11.09-10p2, 11.15-16p2 at r=25.5, 12.07p2 & 12.13-14p2).
MPEC 2018-G07 - "17:47 UT" - 2017 DN121
- K17DC1N 2017 DN121 (q=37.086 AU, Q=58.505 AU, H=7.4 ~112 km) was picked up at 0725 UT on 24 Feb. 2017 by Sheppard/Mauna Kea, observing it at 2017 Feb. 24.31p1 at r=23.0 and 2017 Feb. 24.48p1 at r=23.0. This detection was confirmed by DCT (2017 April 20.17p1, 2017 April 20.23p1, Feb. 6.24-29p3, March 7.16p1 & 7.29p1).
MPEC 2018-G06 - "17:45 UT" - 2017 DM121
- K17DC1M 2017 DM121 (KBO, q=40.950 AU, Q=47.852 AU, H=7.6 ~102 km) was picked up at 0719 UT on 24 Feb. 2017 by Sheppard/Mauna Kea, observing it at 2017 Feb. 24.31p1 at r=23.6 and 2017 Feb. 24.47p1. This detection was confirmed by DCT (2017 April 20.18p1 at R=23.6, 2017 April 20.26p1, Feb. 6.30-31p3, March 7.17-18p2 & 7.30p1).
MPEC 2018-G05 - "17:42 UT" - 2016 TS97
- K16T97S 2016 TS97 (q=36.236 AU, Q=71.562 AU, H=6.1 ~204 km) was picked up at 0512 UT on 6 Oct. 2016 by Sheppard/CTIO, observing it at 2016 Oct. 6.22p1 at r=24.7, 2016 Oct. 6.35p1 at r=24.5, and 2016 Oct. 7.30p1 at r=24.5. This detection was confirmed by Las Campanas Obs. (2016 Nov. 2.14p1, 2016 Nov. 3.08p1, 2016 Dec. 30.08p1, 2016 Dec. 30.16p1, 2017 Dec. 13.08p1 at r=24.6 & 2017 Dec. 14.07p1).
MPEC 2018-G04 - "17:09 UT" - 2014 FD70
- K14F70D 2014 FD70 (q=38.588 AU, Q=69.348 AU, H=6.9 ~141 km) from Las Campanas Obs. (2015 April 19.02p1, 2015 April 19.12p1 at r=24.7, 2015 April 20.11p1, 2015 Nov. 14.34p1 & 2015 Nov. 15.34p1)
MPEC 2018-G03 - "17:08 UT" - 2014 FO69
- K14F69O 2014 FO69 (q=38.900 AU, Q=71.053 AU, H=7.1 ~129 km) from Las Campanas Obs. (2015 April 20.24p1, 2016 May 3.06p1, 2016 May 3.28p1, March 11.35-39p2 at r=24.5 & 12.36-39p2)
- Observations of close-passing objects
- K18F00B 2018 FB (arc=14 days, H=24.1 ~51m) from Castelmartini Obs. (March 24.87p2)
- K18E04J 2018 EJ4 (arc=17 days, H=21.3 ~186m, NHATS target, radar support) from UH/Tholen NEO Follow-Up 2.24m Telescope (March 30.65p3)
- Observation campaigns (NHATS targets, radar support)
- K15XZ2E 2015 XE352 (arc=2 opp, H=20.8 ~234m, NHATS) from Povegliano Veronese Obs. (April 1.84-85p4) and Peschiera del Garda Obs. (April 1.87-90p4)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K18F04Y 2018 FY4 (arc=8 days, H=23.5 ~68m) from Tholen 2.24m (March 30.53p2)
- K18F04P 2018 FP4 (arc=9 days, H=25.3 ~29m) from Tholen 2.24m (March 30.48p3)
- K18F02J 2018 FJ2 (arc=12 days, H=24.5 ~43m) from Tholen 2.24m (March 30.48-50p6 at G=22.10-59)
- K18F01D 2018 FD1 (arc=10 days, H=25.9 ~22m) from the Spacewatch 1.8m telescope (March 20.43p3)
- Observations of other objects
- K18D03X 2018 DX3 (arc=2 opp, H=19.9 ~355m) from Peschiera del Garda Obs. (April 1.93-96p4)
- K18D02F 2018 DF2 (arc=33 days, H=20.8 ~234m) from Tholen 2.24m (March 30.64p2)
- K18C14K 2018 CK14 (arc=75 days, H=19.3 ~467m) from Tholen 2.24m (March 30.64p2)
- K18B02Y 2018 BY2 (arc=88 days, H=20.5 ~269m) from Povegliano Veronese Obs. (April 1.86-87p4)
- K18A13L 2018 AL13 (arc=75 days, H=20.6 ~257m) from Tholen 2.24m (March 30.63p2)
- K17X62J 2017 XJ62 (Q=4.429 AU, arc=105 days, H=21.1 ~204m) from Tholen 2.24m (March 30.57-58p3 at G=22.03-20)
- p5049 515049 2010 FL from CSS (March 28.25-26p4)
- p5010 515010 2009 SK2 from MLS (March 29.50p4)
- p4568 514568 1994 RC from CSS (March 29.33-35p3) and ATLAS Mauna Loa (March 30.40-42p4)
- p3497 513497 2009 HB82 from ATLAS Haleakala (April 1.44-46p4)
- g7684 427684 2004 DH2 from NEAT's USAF Haleakala telescope (2004 Feb. 17.52-54p3)
- c7733 387733 2003 GS from NEAT/Hawaii (2003 April 15.29-32p3)
- X8292 338292 2002 UA31 from NEAT/Hawaii (2002 Nov. 3.34-36p3)
- X3888 333888 1998 ST4 from Castelmartini Obs. (March 24.84-85p3)
- W9437 329437 2002 OA22 from NEAT/Hawaii (2003 Aug. 8.38p1 & 2003 Aug. 8.47p1)
- H2034 172034 2001 WR1 from Castelmartini Obs. (March 24.95p3)
- G3243 163243 2002 FB3 from ATLAS Haleakala (April 1.31-33p4)
- 36284 36284 2000 DM8 from Castelmartini Obs. (March 24.84p2)
- 09856 9856 1991 EE from Castelmartini Obs. (March 24.98-99p3) and Cavezzo Obs. (April 1.81-82p3)
- 03122 3122 Florence (1981 ET3) from Castelmartini Obs. (March 24.83p3)
- 01981 1981 Midas (1973 EA) from Castelmartini Obs. (March 24.82p3)
- 01036 1036 Ganymed (1924 TD) from ATLAS Haleakala (April 1.44-48p8)
Observers on 2 April '18
A total of 24 observers appear in today's MPECs.
|Code||Observer / observatory|
|E23||Arcadia Obs. in New South Wales, 1 in MPEC 2018-G14 -- 2018 FP5|
|H21||Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2018-G13 & 2018-G15 -- 2018 FQ5, 2018 FO5|
|T05||ATLAS Haleakala in Hawaii, 3 in MPEC 2018-G02 -- 513497, 163243, 1036|
|T08||ATLAS Mauna Loa in Hawaii, 1 in MPEC 2018-G02 -- 514568|
|160||Castelmartini Obs. in Italy, 7 in MPEC 2018-G02 -- 2018 FB, 36284, 333888, 172034, 9856, 3122, 1981|
|703||Catalina Sky Survey (CSS) in Arizona, 3 in MPECs 2018-G02 & 2018-G14 -- 2018 FP5, 515049, 514568|
|V06||Catalina Sky Survey Kuiper Telescope in Arizona, 1 in MPEC 2018-G13 -- 2018 FO5|
|107||Cavezzo Obs. in Italy, 1 in MPEC 2018-G02 -- 9856|
|807.||Scott Sheppard via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPECs 2018-G05, 2018-G10, 2018-G11 & 2018-G12 -- 2017 FQ161, 2017 FP161, 2017 FO161, 2016 TS97|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2018-G13 & 2018-G14 -- 2018 FP5, 2018 FO5|
|G37||Discovery Channel Telescope (DCT) in Arizona, 6 in MPECs 2018-G06, 2018-G07, 2018-G09, 2018-G10, 2018-G11 & 2018-G12 -- 2017 FQ161, 2017 FP161, 2017 FO161, 2017 DP121, 2017 DN121, 2017 DM121|
|Q62`||Steven M. Tilley in Louisiana via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2018-G15 -- 2018 FQ5|
|P93||JAXA Space Tracking & Communications Center in Japan, 1 in MPEC 2018-G15 -- 2018 FQ5|
|304||Las Campanas Obs. in Chile, 8 in MPECs 2018-G03, 2018-G04, 2018-G05, 2018-G08, 2018-G09, 2018-G10, 2018-G11 & 2018-G12 -- 2017 FQ161, 2017 FP161, 2017 FO161, 2017 DP121, 2017 DO121, 2016 TS97, 2014 FO69, 2014 FD70|
|H01||Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2018-G13 -- 2018 FO5|
|5685||Scott Sheppard on Mauna Kea in Hawaii, 4 in MPECs 2018-G06, 2018-G07, 2018-G08 & 2018-G09 -- 2017 DP121, 2017 DO121, 2017 DN121, 2017 DM121|
|900||Moriyama Obs. in Japan, 1 in MPEC 2018-G14 -- 2018 FP5|
|G96||Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2018-G02, 2018-G13 & 2018-G15 -- 2018 FQ5, 2018 FO5, 515010|
|K74||Muensterschwarzach Obs. in Germany, 1 in MPEC 2018-G15 -- 2018 FQ5|
|608||NEAT's USAF Haleakala telescope in Hawaii, 4 in MPEC 2018-G02 -- 427684, 387733, 338292, 329437|
|A53||Peschiera del Garda Obs. in Italy, 2 in MPEC 2018-G02 -- 2018 DX3, 2015 XE352|
|A48||Povegliano Veronese Obs. in Italy, 2 in MPEC 2018-G02 -- 2018 BY2, 2015 XE352|
|291||Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2018-G02 -- 2018 FD1|
|I52||Steward Obs. Mt. Lemmon Station in Arizona, 3 in MPECs 2018-G13, 2018-G14 & 2018-G15 -- 2018 FQ5, 2018 FP5, 2018 FO5|
|T12||UH/Tholen NEO Follow-Up 2.24m Telescope in Hawaii, 8 in MPEC 2018-G02 -- 2018 FY4, 2018 FP4, 2018 FJ2, 2018 EJ4, 2018 DF2, 2018 CK14, 2018 AL13, 2017 XJ62|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 2 April '18
Notes for Today's Latest Risk Assessments
|2018 EL4||JPL Sentry||1549||2110-2110||2||7.114e-07||-6.66||-6.76||0||JPL: Computed at 08:35 today Pacific time based on 68 observations spanning 16.182 days (2018-Mar-14.20994 to 2018-Mar-30.392206). Diameter approximately 0.032 km. from weighted mean H=25.14.|
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 2 April '18
Times are UTC for when items were noted or added by The Tracking News.
|2122||Updated Traffic Report|
|1942||Grabbed MPEC 2018-G13 - 2018 FO5 - see above|
Grabbed MPEC 2018-G14 - 2018 FP5 - see above
Grabbed MPEC 2018-G15 - 2018 FQ5 - see above
|1910||Grabbed MPEC 2018-G03 - 2014 FO69 - see above|
Grabbed MPEC 2018-G04 - 2014 FD70 - see above
Grabbed MPEC 2018-G05 - 2016 TS97 - see above
Grabbed MPEC 2018-G06 - 2017 DM121 - see above
Grabbed MPEC 2018-G07 - 2017 DN121 - see above
Grabbed MPEC 2018-G08 - 2017 DO121 - see above
Grabbed MPEC 2018-G09 - 2017 DP121 - see above
Grabbed MPEC 2018-G10 - 2017 FO161 - see above
Grabbed MPEC 2018-G11 - 2017 FP161 - see above
Grabbed MPEC 2018-G12 - 2017 FQ161 - see above
|1549||Noted that JPL Sentry has updated its 2018 EL4 risk assessment - see above|
Grabbed MPEC 2018-G02 - Daily Orbit Update - see above