Contents on 20 February '18
- Traffic Report -- nine objects
- IAU Minor Planet Center
- Observers -- eighteen observers
- Impact Risk Monitoring -- one object
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 914 risk-listed objects, 51 have had news in the last 31 days. Updated at 1630 UTC on 20 Feb.
- 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 20 February '18
Nine objects reported inside ten LD
Nine visitors are reported within ten lunar distances (LD) of our planet today. Nearest of these is risk-listed 2018 DB, which is inside Earth's SOI and comes its closest to us on this passage, reaching 2.25 LD at 2050 UTC.
|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|
|0.92 LD Feb. 15||2018 CD3||6 m||7.06 to 8.72 LD||Feb. 9 - 21||intruder, NHATS target|
|2.23 LD Feb. 15||2018 CU2||9 m||9.81 to 11.75 LD||Feb. 10 - 20||exits ten LD|
|2.25 LD today||2018 DB||10 m||2.25 LD||Feb. 18 - 23|| Earth closest at 2050 UTC, Moon |
closest 2.94 LD at 2316 UTC, risk
|3.7 LD Feb. 24*||2017 DR109||10 m||6.5 from 7.9 LD||Feb. 18 - March 1||EPU +/- 30 mins.*, NHATS target|
|5.17 LD Feb. 24||2018 CE14||25 m||9.83 from 11.84 LD||today - Feb. 28||NHATS target, enters ten LD|
|5.36 LD Feb. 27||2018 CU14||9 m||8.27 from 9.05 LD||Feb. 18 - March 8|
|6.08 LD yesterday||2018 CP2||48 m||6.11 to 6.83 LD||Feb. 16 - 22|
|6.66 LD Jan. 15||2018 AV2||6 m||8.61 to 8.72 LD||Nov. 10 - March 2||NHATS target, natural?|
|9.26 LD today||2018 CJ||64 m||9.26 LD||yesterday - tomorrow||Earth closest at 0725 UTC|
This report was generated at 1720 UTC with follow-up in today's DOU MPEC for departed intruder 2018 CB.
|Approaching Traffic - sorted by 10-LD bubble entry date|
|Earth passage||I D||~Size||Distance today||Inside ten LD||Notes|
|3.76 LD March 7||2017 VR12||273 m||20.42 from 21.78 LD||Feb. 28 - March 13||radar/NHATS target|
|9.3 LD March 3*||2018 DC||40 m||21.9 from 23.6 LD||March 1 - 5||EPU +/- 32 mins.*|
|6.9 LD March 10*||2015 DK200||26 m||32.2 from 34.1 LD||March 6 - 14||EPU +/- 23.45 hours*, 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. "LD*" indicates some uncertainty in object passage time and distance. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.
NEOCP Activity on 20 February '18
The MPC's NEO Confirmation Page has 19 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, nine were "one nighters." So far The Tracking News has counted a total of 24 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 20 February '18
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- MPEC 2018-D27 time-stamped "12:30 UT" - 2018 DG - see below
- MPEC 2018-D28 time-stamped "13:04 UT" - Daily Orbit Update - see below
- MPEC 2018-D29 time-stamped "17:17 UT" - 2007 TC434 - see below
- MPEC 2018-D30 time-stamped "18:02 UT" - 2013 UW18 - see below
- MPEC 2018-D31 time-stamped "18:05 UT" - 2013 UX18 - see below
- MPEC 2018-D32 time-stamped "18:08 UT" - 2014 UO231
MPEC 2018-D32 - "18:08 UT" - 2014 UO231
- K14UN1O 2014 UO231 (q=42.243 AU, Q=67.995 AU, H=8.3 ~74.1 km) was picked up at 1011 UT on 22 Oct. 2014 by Jean-Marc Petit on Mauna Kea, observing it at 2013 Sept. 1.52p1 at r=25.4, 2013 Sept. 2.51p1 at r=24.5, 2013 Sept. 2.56p1 at r=24.7, 2013 Oct. 31.36p1 at r=25.2, 2013 Nov. 1.35p1 at r=25.2, 2013 Nov. 1.44p1 at r=24.2, 2013 Dec. 4.35p1 at r=24.7, 2014 July 25.52p1 at r=24.3, 2014 Aug. 23.61p1 at r=25.3, 2014 Aug. 27.45p1 at r=25.4, 2014 Aug. 27.55p1 at r=25.0, 2014 Sept. 18.38p1 at r=24.7, 2014 Sept. 23.46p1 at r=25.0, 2014 Oct. 22.42-50p3 at r=24.4-9, 2014 Nov. 19.23p1 at r=24.7, 2015 Sept. 15.52p1 at w=25.2, 2015 Sept. 15.57p1 at w=25.5, 2015 Oct. 13.48p1, 2015 Oct. 13.55p1, 2015 Dec. 7.46p1 at w=25.1, 2017 Jan. 31.22p1 at w=26.1, 2017 Aug. 25.62p1 at w=25.6, and 2017 Aug. 31.60p1 at w=25.3.
MPEC 2018-D31 - "18:05 UT" - 2013 UX18
- K13U18X 2013 UX18 (KBO, q=40.774 AU, Q=46.118 AU, H=7.1 ~129 km) was picked up at 0555 UT on 31 Oct. 2013 by Petit/Mauna Kea, observing it at 2013 Aug. 2.52p1 at r=23.5, 2013 Aug. 2.57p1 at r=23.4, 2013 Aug. 30.44p1, 2013 Aug. 31.44p1 at r=23.5, 2013 Aug. 31.49-50p4 at r=23.5-7, 2013 Sept. 4.42p1 at r=23.4, 2013 Sept. 4.47p1 at r=23.4, 2013 Oct. 6.41p1 at r=23.5, 2013 Oct. 6.49p1 at r=23.8, 2013 Oct. 9.53p2 at r=23.4-24.1, 2013 Oct. 31.25p1 at r=23.5, 2013 Oct. 31.29p1 at r=23.5, 2013 Oct. 31.33p1 at r=23.2, 2013 Nov. 1.27p1 at r=23.4, 2013 Nov. 1.40p1 at r=22.7, 2013 Nov. 5.45p1 at r=23.6, 2013 Nov. 29.31p1 at r=24.0, 2013 Dec. 4.26p1 at r=24.0, 2013 Dec. 4.32p1 at r=24.2, 2014 June 27.59p1 at r=23.8, 2014 June 28.60p1 at r=23.9, 2014 July 24.55p1 at r=23.9, 2014 July 27.58p1 at r=23.8, 2014 Aug. 22.55p1 at r=23.3, 2014 Aug. 28.41p1 at r=23.5, 2014 Oct. 23.37p1 at r=23.5, 2014 Oct. 25.28-29p2 at u=23.7-25.4, 2014 Oct. 25.34p1 at r=23.6, 2014 Oct. 27.31-36p4 at r=23.4-25.3, 2014 Oct. 27.41p1 at r=23.5, 2014 Nov. 24.24p1 at r=23.3, 2014 Nov. 25.23p1 at r=23.4, and 2015 Jan. 18.22p1 at r=23.7.
MPEC 2018-D30 - "18:02 UT" - 2013 UW18
- K13U18W 2013 UW18 (KBO, q=31.314 AU, Q=47.051 AU, H=8.5 ~67.6 km) was picked up at 0526 UT on 31 Oct. 2013 by Petit/Mauna Kea, observing it at 2013 Aug. 2.50p1 at r=24.4, 2013 Aug. 2.55p1 at r=24.6, 2013 Aug. 11.50p1 at r=24.3, 2013 Aug. 31.42p1 at r=23.9, 2013 Aug. 31.47p1 at r=24.1, 2013 Sept. 4.40p1 at r=24.0, 2013 Sept. 4.45p1 at r=24.2, 2013 Oct. 5.38p1 at r=23.7, 2013 Oct. 6.38p1 at r=23.9, 2013 Oct. 6.44p1 at r=24.0, 2013 Oct. 9.51p1 at r=23.7, 2013 Oct. 31.23p1 at r=24.0, 2013 Oct. 31.27p1 at r=24.3, 2013 Oct. 31.31p1 at r=24.2, 2013 Nov. 1.25p1 at r=23.9, 2013 Nov. 5.38p1 at r=24.3, 2013 Nov. 6.35p1, 2013 Nov. 6.40p1 at r=24.5, 2013 Nov. 7.44p1 at r=24.0, 2013 Dec. 5.32p1 at r=24.4, 2014 July 24.54p1 at r=24.3, 2014 July 27.57p1 at r=24.4, 2014 Aug. 22.61p1 at r=23.7, 2014 Aug. 28.45p1 at r=24.3, 2014 Oct. 23.29p1 at r=23.8, 2014 Oct. 27.25p1 at r=24.2, 2014 Nov. 19.21p1 at r=24.2, 2014 Nov. 19.27p1 at r=24.0, 2014 Nov. 25.22p1 at r=24.6, 2014 Dec. 17.32p1 at r=24.4, and 2015 Jan. 17.26p1 at r=24.4.
MPEC 2018-D29 - "17:17 UT" - 2007 TC434
- K07Th4C 2007 TC434 (q=39.577 AU, Q=217.220 AU, H=7.2 ~123 km) from Petit/Mauna Kea (2013 Aug. 8.56p1 at r=23.4, 2013 Aug. 8.60-61p2 at r=23.2-4, 2013 Aug. 9.49p1 at r=22.6, 2013 Aug. 9.58p1 at r=23.1, 2013 Sept. 1.53-57p2 at r=22.9-23.3, 2013 Sept. 2.52p1 at r=23.3, 2013 Sept. 2.57p1 at r=23.3, 2013 Oct. 9.40p1 at r=23.2, 2013 Oct. 30.38p1 at r=23.2, 2013 Oct. 31.37-38p2 at r=23.3, 2013 Nov. 1.32-36p2 at r=23.2-3, 2013 Nov. 1.45p1 at r=23.3, 2013 Nov. 27.37p1 at r=23.2, 2013 Dec. 4.35p1 at r=22.8, 2014 July 25.52-56p2 at r=23.3-4, 2014 July 25.60p1 at r=23.3, 2014 Aug. 23.56p1 at r=23.4, 2014 Aug. 23.61p1 at r=23.2, 2014 Aug. 27.45p1 at r=23.2, 2014 Aug. 27.55p1 at r=23.3, 2014 Sept. 18.38-43p3 at r=23.1-2, 2014 Sept. 23.47p1 at r=23.2, 2014 Oct. 22.43-51p3 at r=23.2-3, 2014 Oct. 23.43p1 at r=23.2, 2014 Oct. 25.43p1 at r=23.0, 2014 Nov. 19.24p1 at r=23.2, 2014 Nov. 19.37p1 at r=23.1, 2014 Nov. 21.22p1 at r=22.9, 2015 Feb. 19.23-25p2 at r=23.1-2, 2017 Jan. 31.22p1 at w=23.2, 2017 Aug. 25.58p1 at w=23.5, 2017 Aug. 30.60p1 at w=23.6 & 2017 Aug. 31.57p1 at w=23.5)
- Observations of recently (no longer) risk-listed objects
- K18C00B 2018 CB (small asteroid, arc=6 days, H=25.9 ~22m, close passer, NHATS target) from Northolt Branch Obs. (Feb. 9.89p7)
- Observation campaigns (NHATS targets, radar support)
- K18C14A 2018 CA14 (arc=8 days, H=24.3 ~47m, NHATS) from Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) (Feb. 19.13-14p3)
- h8017 438017 2003 YO3 (radar) from WISE (Feb. 18.29p1, 18.56p1, 18.69p1, 18.82p1, 19.08p1 & 19.34p1)
-- NHATS target table -- Planetary radar schedules: Arecibo & Goldstone
- Observations of small asteroids (H>22.0)
- K18C14P 2018 CP14 (arc=3 days, H=22.6 ~102m) from ATLAS Haleakala (Feb. 18.51-54p4)
- K18C14C 2018 CC14 (arc=7 days, H=22.5 ~107m) from Holmes/CTIO (Feb. 19.05p3)
- K18C13Z 2018 CZ13 (arc=8 days, H=23.7 ~62m) from Holmes/CTIO (Feb. 19.11-12p3)
- Observations of other objects
- K18C14B 2018 CB14 (Q=4.199 AU, arc=7 days, H=21.3 ~186m) from Holmes/CTIO (Feb. 19.10p2)
- K18B02Z 2018 BZ2 (arc=32 days, H=20.4 ~282m) from Holmes/CTIO (Feb. 19.06-08p3)
- K18A12M 2018 AM12 (arc=35 days, H=21.2 ~195m) from Holmes/CTIO (Feb. 19.04-05p3)
- K17Y07U 2017 YU7 (i=49.7°, arc=56 days, H=20.9 ~224m) from Holmes/CTIO (Feb. 19.06-09p3 at G=23.0)
- K15C62N 2015 CN62 (arc=4 opp, H=20.0 ~339m) from Oukaimeden Obs. (2015 Feb. 27.05-08p4)
- o5657 505657 2014 SR339 from Al-Fulaij Obs. (Feb. 19.64-65p5)
- i9074 449074 2012 FR62 from the Catalina Sky Survey (CSS) (2015 Oct. 10.28-29p2)
- V1554 311554 2006 BQ147 from Al-Fulaij Obs. (Feb. 19.72p4)
- G2882 162882 2001 FD58 from Olmen Obs. (Feb. 17.74-75p3) and Al-Fulaij Obs. (Feb. 19.63p1)
- D7925 137925 2000 BJ19 from NEAT's Mt. Palomar telescope (2003 Jan. 17.49-51p2) and GINOP-KHK (Feb. 19.16-18p8)
- D7062 137062 1998 WM from NEAT/Palomar (2002 Nov. 14.30p1, 2002 Nov. 14.37p1 & 2002 Nov. 14.43p1)
- D6839 136839 1997 WT22 from WISE (Feb. 16.51p1, 16.57p1, 16.64p1, 16.70p1, 16.77p1, 16.83p1, 16.90p1, 17.03p1, 17.16p1, 17.36p1, 17.49p1, 17.55p1, 17.62p2, 17.75p1, 17.81p1, 17.88p2, 18.14p2, 18.27p2, 18.53p2, 18.67p1, 18.80p2, 18.93p2, 19.06p2, 19.19p2 & 19.32p1)
- 96590 96590 1998 XB from Muensterschwarzach Obs. (Feb. 20.22p4)
- 85990 85990 1999 JV6 from WISE (Feb. 16.94p1, 17.07p1, 17.20p1, 17.33p1, 17.46p1, 17.59p1, 17.72p1, 17.85p1, 18.11p1, 18.25p1, 18.51p1, 18.57p1, 18.64p1, 18.70p1, 18.83p1, 18.97p1, 19.29p1, 19.36p1 & 19.49p1)
- 06053 6053 1993 BW3 from Al-Fulaij Obs. (Feb. 19.71p5)
MPEC 2018-D27 - "12:30 UT" - 2018 DG
- K18D00G 2018 DG (small asteroid, H=23.9 ~56m) was picked up at 0700 UT on 18 Feb. by Pan-STARRS 1 (PS1), observing it at Feb. 18.29-32p3. This detection was confirmed by GINOP-KHK (Feb. 18.93-94p3), Holmes/CTIO (Feb. 19.03-04p5), McCarthy Obs. (Feb. 19.23-25p3), Pascoli Obs. (Feb. 19.80-81p3), San Marcello Pistoiese Obs. (Feb. 19.83-84p3), Farra d'Isonzo Obs. (Feb. 19.93-94p4), and Visnjan Obs. (Feb. 19.97p7).
Observers on 20 February '18
Eighteen observers appear in today's MPECs.
|Code||Observer / observatory|
|C97||Al-Fulaij Obs., 4 in MPEC 2018-D28 -- 505657, 311554, 162882, 6053|
|T05||ATLAS Haleakala in Hawaii, 1 in MPEC 2018-D28 -- 2018 CP14|
|703||Catalina Sky Survey in Arizona, 1 in MPEC 2018-D28 -- 449074|
|807|||Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2018-D27 & 2018-D28 -- 2018 DG, 2018 CZ13, 2018 CC14, 2018 CB14, 2018 CA14, 2018 BZ2, 2018 AM12, 2017 YU7|
|595||Farra d'Isonzo Obs. in Italy, 1 in MPEC 2018-D27 -- 2018 DG|
|K88||GINOP-KHK in Hungary, 2 in MPECs 2018-D27 & 2018-D28 -- 2018 DG, 137925|
|568@||Jean-Marc Petit on Mauna Kea in Hawaii, 4 in MPECs 2018-D29, 2018-D30, 2018-D31 & 2018-D32 -- 2014 UO231, 2013 UX18, 2013 UW18, 2007 TC434|
|932||McCarthy Obs. in Connecticut, 1 in MPEC 2018-D27 -- 2018 DG|
|K74||Muensterschwarzach Obs. in Germany, 1 in MPEC 2018-D28 -- 96590|
|644||NEAT's Mt. Palomar telescope in southern California, 2 in MPEC 2018-D28 -- 137925, 137062|
|Z80||Northolt Branch Obs. in England, 1 in MPEC 2018-D28 -- 2018 CB|
|C23||Olmen Obs. in Belgium, 1 in MPEC 2018-D28 -- 162882|
|J43||Oukaimeden Obs. in Morocco, 1 in MPEC 2018-D28 -- 2015 CN62|
|F51||Pan-STARRS 1 in Hawaii, 1 in MPEC 2018-D27 -- 2018 DG|
|K63||Pascoli Obs. in Italy, 1 in MPEC 2018-D27 -- 2018 DG|
|104||San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2018-D27 -- 2018 DG|
|L01||Visnjan Obs., 1 in MPEC 2018-D27 -- 2018 DG|
|C51||WISE in Earth polar orbit, 3 in MPEC 2018-D28 -- 85990, 438017, 136839|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 20 February '18
Notes for Today's Latest Risk Assessments
|2018 DB||NEODyS||1630||2068-2088||2||4.84e-08||-8.46||-8.5||0||NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2018-02-17.410 to 2018-02-19.218."|
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 20 February '18
Times are UTC for when items were noted or added by The Tracking News.
|1838||Grabbed MPEC 2018-D30 - 2013 UW18 - see above|
Grabbed MPEC 2018-D31 - 2013 UX18 - see above
Grabbed MPEC 2018-D32 - 2014 UO231 - see above
|1731||Grabbed MPEC 2018-D29 - 2007 TC434 - see above|
|1720||Generated Traffic Report|
|1630||Noted that NEODyS has posted 2018 DB as an impact risk - see above|
Grabbed MPEC 2018-D27 - 2018 DG - see above
Grabbed MPEC 2018-D28 - Daily Orbit Update - see above