Contents on 10 January '18
- Traffic Report -- no objects
- IAU Minor Planet Center
- Observers -- four observers
- Impact Risk Monitoring -- four objects
Asteroid/Comet Connection (A/CC) Resources:
- Consolidated Risk Tables - the CRT page
Of 905 risk-listed objects, 55 have had news in the last 31 days. Updated at 1901 UTC on 10 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)
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 10 January '18
No objects reported inside ten LD
Although some tentative possibilities appear on NASA/JPL's Scout NEOCP Hazard Assessment page, there currently are no formally announced transient natural objects within ten lunar distances (LD) of our home world today. What we do know is that 2018 AJ will come inside ten LD on or about January 16th.
This report was generated at 1822 UTC with follow-up in today's DOU MPEC for departed 2006 XY.
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 10 January '18
The MPC's NEO Confirmation Page has 50 listings
When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 50 objects listed. Of these, 31 were "one nighters." So far The Tracking News has counted a total of 51 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 10 January '18
Minor Planet Electronic Circulars
As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of close-passing objects
- K06X00Y 2006 XY (arc=2 opp, H=24.2 ~49m, NHATS target) from Pan-STARRS 1 (PS1) (Jan. 9.56-59p4)
- Observations of small asteroids (H>22.0)
- K17X60R 2017 XR60 (arc=26 days, H=24.6 ~41m) from PS1 (Jan. 9.51-54p3)
- Observations of other objects
- K17Y04P 2017 YP4 (Q=4.433 AU, arc=17 days, H=19.1 ~513m) from Transit Dreams Obs. (Jan. 7.11-13p2)
- K15Bp0W 2015 BW510 (q=0.356 AU, arc=2 opp, H=20.7 ~245m) from PS1 (Jan. 9.38-41p7)
- K14J57N 2014 JN57 (arc=2 opp, H=20.5 ~269m) from PS1 (Jan. 9.29-33p4)
- J99A04F 1999 AF4 (Q=4.570 AU, arc=2 opp, H=18.5 ~676m) from Transit Dreams Obs. (Jan. 7.10-13p3) and Olmen Obs. (Jan. 7.76-77p4)
- n5960 495960 2007 MT20 from PS1 (Jan. 9.57-60p3)
- d9611 399611 2004 BE11 from ATLAS Mauna Loa (Jan. 9.33-35p4)
- X1792 331792 2003 MT2 from PS1 (Jan. 9.22-26p4 at w=22.0-22.2)
- W9520 329520 2002 SV from PS1 (Jan. 9.22-25p3)
- V1554 311554 2006 BQ147 from ATLAS Mauna Loa (Jan. 9.54-57p7)
- T4739 294739 2008 CM from ATLAS Mauna Loa (Jan. 9.52-54p3)
- O1370 241370 2008 LW8 from PS1 (Jan. 9.56-58p3)
- K9924 209924 2005 WS55 from ATLAS Mauna Loa (Jan. 9.63-65p4)
- J0208 190208 2006 AQ from Transit Dreams Obs. (Jan. 7.19-23p3)
- F3349 153349 2001 PJ9 from Transit Dreams Obs. (Jan. 7.11-14p3)
- D7052 137052 Tjelvar (1998 VO33) from PS1 (Jan. 9.62-64p3)
- 96590 96590 1998 XB from Transit Dreams Obs. (Jan. 7.19-22p3) and PS1 (Jan. 9.61-64p3)
- 88188 88188 2000 XH44 from PS1 (Jan. 9.30-34p4)
- 68950 68950 2002 QF15 from ATLAS Mauna Loa (Jan. 9.21-23p3)
- 16834 16834 1997 WU22 from ATLAS Mauna Loa (Jan. 9.59-62p4)
- 11405 11405 1999 CV3 from ATLAS Mauna Loa (Jan. 9.33-35p3)
- 07977 7977 1977 QQ5 from Transit Dreams Obs. (Jan. 7.11-14p3)
- 06053 6053 1993 BW3 from PS1 (Jan. 9.52-54p2)
- 02329 2329 Orthos (1976 WA) from ATLAS Mauna Loa (Jan. 9.30-33p8)
- 01036 1036 Ganymed (1924 TD) from ATLAS Mauna Loa (Jan. 9.57-59p4)
Observers on 10 January '18
Four observers appear in today's MPEC.
|Code||Observer / observatory|
|T08||ATLAS Mauna Loa in Hawaii, 9 in MPEC 2018-A38 -- 68950, 399611, 311554, 294739, 209924, 16834, 11405, 2329, 1036|
|C23||Olmen Obs. in Belgium, 1 in MPEC 2018-A38 -- 1999 AF4|
|F51||Pan-STARRS 1 (PS1) in Hawaii, 12 in MPEC 2018-A38 -- 2017 XR60, 2015 BW510, 2014 JN57, 2006 XY, 96590, 88188, 495960, 331792, 329520, 241370, 137052, 6053|
|W33||Transit Dreams Obs., 6 in MPEC 2018-A38 -- 2017 YP4, 1999 AF4, 96590, 190208, 153349, 7977|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 10 January '18
Notes for Today's Latest Risk Assessments
|2017 YO6||NEODyS||1646||R E M O V E D||-|
|2017 FD3||NEODyS||1646||2053-2063||2||3.59e-08||-8.65||-8.68||0||NEODyS: "Based on 37 optical observations (of which 1 are rejected as outliers) from 2017-03-19.440 to 2017-04-01.417."|
|2010 DG77||JPL Sentry||1900||2018-2117||574||7.3890985e-06||-4.78||-5.93||0||JPL: Computed at 09:40 April 7th of 2017 Pacific time based on 10 observations spanning .59543 days (2010-Feb-19.17573 to 2010-Feb-19.77116). Diameter approximately 0.044 km. from weighted mean H=24.47.|
|2005 NX55||NEODyS||1646||2019-2108||187||3.52e-08||-5.36||-6.45||0||NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2005-07-11.164 to 2005-07-12.298."|
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 10 January '18
Times are UTC for when items were noted or added by The Tracking News.
|1900||Noted that JPL Sentry has updated its 2010 DG77 risk assessment - see above|
|1822||Generated Traffic Report|
|1646||Noted that NEODyS has updated its 2005 NX55 risk assessment - see above|
Noted that NEODyS has updated its 2017 FD3 risk assessment - see above
Noted that NEODyS has removed 2017 YO6 as an impact risk - see above
Grabbed MPEC 2018-A38 - Daily Orbit Update - see above