See 2010 in images, a simple collection from the closing year of pictorial news for small Solar-System bodies. A few examples, clockwise from upper left: A dustup on 596 Scheila, a flyby of 21 Lutetia, the passing of an original, Brian Marsden, the disruption of P/2010 A2 (LINEAR), finding bits of 2008 TC3, and bringing DSS-14 back into service. Credits and copyrights for one or more: Great Shefford, ESA, H-S CfA, NASA, SETI, and JPL (see the respective links for details).
Contents on 31 December '10
- IAU Minor Planet Center
- Observers -- five observers
- Impact Risk Monitoring -- one object
- Consolidated Risk Tables - the CRT page
Of 388 risk-listed objects, 350 have had news in the last 31 days. Updated at 2359 UTC on 31 Dec.
- Earth's Busy Neighborhood Traffic Report
Two objects are known to be within ten LD of Earth today. Updated at 1815 UTC on 31 Dec.
- Ephemerides for risk-rated and nearby objects
- News image catalog
- Old & new CRT Archive
- Old News Archive & Small Objects Archive
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. And use the all-up news archive to access news from any time since A/CC began in early 2002. To keep track of what's new each day, watch the Chronology section.
NEOCP Activity on 31 December '10
The MPC's NEO Confirmation Page has 7 listings: 6 new, 1 updated
When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and one updated listings. Of these, five were "one nighters."
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 December '10
Minor Planet Electronic Circulars
As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.
- Observations of risk-listed objects
- K10X25C 2010 XC25 (arc=21 days, H=20.7 ~245m) from Schiaparelli Obs. (Dec. 29.18-19p3)
- Observations of recently (no longer) risk-listed objects
- K10Y00D 2010 YD (small asteroid, arc=4 days, H=26.6 ~16m) from Schiaparelli Obs. (Dec. 29.07-08p2)
- Observations of small asteroids (H>22.0)
- K10Y00S 2010 YS (arc=2 days, H=22.1 ~129m) from Verona Obs. (Dec. 30.99p4)
- K10Y00O 2010 YO (arc=3 days, H=24.6 ~41m) from Schiaparelli Obs. (Dec. 29.03-04p3)
- Observations of other objects
- K10RH9R 2010 RR179 (Q=4.254 AU, arc=118 days, H=21.2 ~195m) from Schiaparelli Obs. (Dec. 29.04-05p3)
- K10OA1C 2010 OC101 (arc=159 days, H=20.8 ~234m) from Schiaparelli Obs. (Dec. 29.11-13p3)
- K10J33L 2010 JL33 (Q=4.634 AU, arc=4 opp, H=17.6 ~1.02 km) from Verona Obs. (Dec. 27.86-87p4 & 30.99-00p4)
- K10B02L 2010 BL2 (i=60.1°, arc=2 opp, H=16.4 ~1.78 km) from WISE (Jan. 8.97p1, 9.23p1 & 9.36p1)
- K09WA6O 2009 WO106 (arc=54 days, H=19.2 ~490m) from WISE (Jan. 17.88p1, 18.01p1, 18.14p1, 18.47p1, 18.54p1, 18.61p1, 19.00p1 & 19.14p1)
- K08X00M 2008 XM (q=0.111 AU, arc=2 opp, H=19.9 ~355m) from WISE (Jan. 18.62p2)
- K06V14B 2006 VB14 (arc=3 opp, H=18.5 ~676m) from Tzec Maun Obs. Moorook (Dec. 30.55-57p2)
- K05C41F 2005 CF41 (arc=5 opp, H=18.5 ~676m) from Schiaparelli Obs. (Dec. 29.09-10p2)
- K00CA1R 2000 CR101 (arc=2 opp, H=20.1 ~323m) from Schiaparelli Obs. (Dec. 29.10-11p3)
- K00CA1O 2000 CO101 (arc=2 opp, H=19.1 ~513m) from WISE (Jan. 11.37p1)
- K00A06C 2000 AC6 (arc=4 opp, H=21.5 ~170m) from Wishing Star Obs. (Dec. 30.99-01p3)
- J99L07S 1999 LS7 (arc=6 opp, H=20.7 ~245m) from WISE (Jan. 15.77p1, 15.83p1, 15.90p1, 15.96p1, 16.03p1, 16.10p1 & 16.23p2)
- J98Y05W 1998 YW5 (arc=3 opp, H=19.9 ~355m) from WISE (Jan. 18.57p1, 18.63p1, 18.76p1, 18.83p1 & 18.90p1)
- J97X02S 1997 XS2 (Q=4.046 AU, arc=2 opp, H=19.4 ~446m) from Schiaparelli Obs. (Dec. 29.06-07p3)
- N0549 230549 2003 BH from WISE (Jan. 17.44p1, 17.51p1, 17.57p1, 17.64p1 & 17.77p1)
- N0420 230420 2002 PP6 from WISE (Jan. 16.64p1, 16.71p1 & 16.77p1)
- J8856 198856 2005 LR3 from Wishing Star Obs. (Dec. 30.96-97p3)
- G3023 163023 2001 XU1 from WISE (Jan. 10.19p1, 10.25p1, 10.32p1, 10.38p1 & 11.38p1)
- 96744 96744 1999 OW3 from Tzec Maun Obs. Moorook (Dec. 30.67p3)
- 20790 20790 2000 SE45 from WISE (Jan. 10.50p1)
- 03200 3200 Phaethon (1983 TB) from WISE (Jan. 7.26p1 & 7.39p1)
Observers on 31 December '10
Five observers appear in today's MPEC.
|Code||Observer / observatory|
|204||Schiaparelli Obs. in Italy, 8 in MPEC 2010-Y39 -- 2010 YO, 2010 YD, 2010 XC25, 2010 RR179, 2010 OC101, 2005 CF41, 2000 CR101, 1997 XS2|
|D96||Tzec Maun Obs. Moorook in South Australia, 2 in MPEC 2010-Y39 -- 2006 VB14, 96744|
|A48||Verona Obs. in Italy, 2 in MPEC 2010-Y39 -- 2010 YS, 2010 JL33|
|C51||WISE in Earth polar orbit, 11 in MPEC 2010-Y39 -- 2010 BL2, 2009 WO106, 2008 XM, 2000 CO101, 1999 LS7, 1998 YW5, 230549, 230420, 20790, 163023, 3200|
|I15||Wishing Star Obs. in Rhode Island, 2 in MPEC 2010-Y39 -- 2000 AC6, 198856|
|For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.|
Impact Risk Monitoring on 31 December '10
Notes for Today's Latest Risk Assessments
|2010 XC25||NEODyS||1646||2048-2063||6||2.43e-05||-2.43||-2.48||0||NEODyS: "Based on 56 optical observations (of which 1 are rejected as outliers) from 2010-12-08.378 to 2010-12-29.195."|
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.