2008-12-13 Tracking News

Contents on 13 December '08

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- one MPEC
Observers -- eight observing facilities
Impact Risk Monitoring -- two objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate RSS news feed.

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 13 December '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active on December 9th.

New MPECs on 13 December '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 13 Dec. '08 >> MPEC 2008-X82 - "07:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K08X01C 2008 XC1 (small asteroid, arc=8 days, H=23.7 ~62m) from Golden Hill Obs. (Dec. 6.91-14p14) and Astronomical Research Obs. (ARO) (Dec. 11.25-26p7)
K08W96K 2008 WK96 (small asteroid, arc=11 days, H=23.0 ~85m) from ARO (Dec. 11.27-28p3)
Observations of recently (no longer) risk-listed objects
K08X02P 2008 XP2 (arc=6 days, H=18.5 ~676m) from ARO (Dec. 11.36-37p3)
K08X02B 2008 XB2 (small asteroid, arc=7 days, H=25.1 ~32m) from ARO (Dec. 11.08-09p7)
K08X01M 2008 XM1 (almost small, Q=4.219 AU, arc=7 days, H=22.0 ~135m) from Schiaparelli Obs. (Dec. 6.88-89p4)
K08X00O 2008 XO (small asteroid, arc=9 days, H=24.2 ~49m) from ARO (Dec. 11.14-16p3)
K08W59B 2008 WB59 (arc=18 days, H=19.4 ~446m) from ARO (Dec. 11.15-16p3)
K08W14D 2008 WD14 (small asteroid, arc=20 days, H=22.9 ~89m) from ARO (Dec. 11.16-17p5)
K08W00L 2008 WL (almost small, Q=4.483 AU, arc=23 days, H=21.8 ~148m) from ARO (Dec. 11.26-27p3)
K08V14H 2008 VH14 (small asteroid, Q=4.704 AU, arc=33 days, H=23.5 ~68m) from ARO (Dec. 11.29p3)
Observations of small asteroids (H>22.0)
K08X00S 2008 XS (arc=5 days, H=27.1 ~13m) from Schiaparelli Obs. (Dec. 6.93-94p2)
K08W96E 2008 WE96 (arc=7 days, H=23.7 ~62m) from Schiaparelli Obs. (Dec. 6.83-84p3)
K08W60K 2008 WK60 (arc=17 days, H=22.4 ~112m) from ARO (Dec. 11.03-04p3)
K08W00K 2008 WK (arc=23 days, H=23.2 ~78m) from ARO (Dec. 11.33-34p3)
Observations of other objects
K08X03E 2008 XE3 (Q=4.045 AU, arc=2 opp, H=16.2 ~1.95 km) from the Spacewatch 0.9m telescope (2005 Jan. 16.42-47p3) and the Mt. Lemmon Survey (MLS) (2005 March 8.18-20p4)
K08X02W 2008 XW2 (arc=5 days, H=20.7 ~245m) from Schiaparelli Obs. (Dec. 8.18-19p5)
K08X02E 2008 XE2 (arc=7 days, H=19.1 ~513m) from ARO (Dec. 11.32p3)
K08X02A 2008 XA2 (arc=7 days, H=21.4 ~178m) from Schiaparelli Obs. (Dec. 7.80-81p3) and ARO (Dec. 11.09-10p5)
K08X01B 2008 XB1 (arc=8 days, H=21.0 ~214m) from ARO (Dec. 11.07p5)
K08X00P 2008 XP (arc=10 days, H=21.5 ~170m) from ARO (Dec. 11.20-21p3)
K08W94Z 2008 WZ94 (q=0.346 AU, arc=11 days, H=20.2 ~309m) from ARO (Dec. 11.11-12p2)
K08W60L 2008 WL60 (arc=18 days, H=18.2 ~776m) from ARO (Dec. 11.22-23p3)
K08W60H 2008 WH60 (arc=18 days, H=20.8 ~234m) from ARO (Dec. 11.06p3)
K08V14K 2008 VK14 (arc=33 days, H=19.3 ~467m) from ARO (Dec. 11.18p2)
K08V00N 2008 VN (Q=5.011 AU, arc=2 opp, H=16.9 ~1.41 km) from ARO (Dec. 11.20p3)
K08U95C 2008 UC95 (arc=44 days, H=18.5 ~676m) from ARO (Dec. 11.36-37p6) and Petit Jean Mtn. South Obs. (PJMSO) (Dec. 12.40-41p5)
K08U07E 2008 UE7 (arc=47 days, H=20.4 ~282m) from ARO (Dec. 11.32-33p6) and PJMSO (Dec. 12.38p8)
K08S07V 2008 SV7 (arc=78 days, H=21.6 ~162m) from ARO (Dec. 11.26-27p4)
K08S07P 2008 SP7 (Q=4.200 AU, arc=79 days, H=18.9 ~562m) from ARO (Dec. 11.11p3)
K08R26T 2008 RT26 (arc=95 days, H=19.4 ~446m) from ARO (Dec. 11.28p3)
K08N00B 2008 NB (arc=163 days, H=19.3 ~467m) from ARO (Dec. 11.21-22p3)
K08M00Z 2008 MZ (Q=4.207 AU, arc=179 days, H=18.6 ~645m) from ARO (Dec. 11.21-22p5)
K08L08W 2008 LW8 (arc=3 opp, H=17.4 ~1.12 km) from Schiaparelli Obs. (Dec. 8.03p2 & 8.11p1) and ARO (Dec. 11.28-29p3)
K07Y00Z 2007 YZ (arc=2 opp, H=19.6 ~407m) from ARO (Dec. 11.13-14p3)
K07U03W 2007 UW3 (arc=65 days, H=19.3 ~467m) from Tiki Obs. (2007 Nov. 2.56-61p3)
K06V14B 2006 VB14 (arc=2 opp, H=18.5 ~676m) from Schiaparelli Obs. (Dec. 8.08-13p3) and ARO (Dec. 11.35-36p4)
K06SL7Z 2006 SZ217 (arc=3 opp, H=17.4 ~1.12 km) from ARO (Dec. 11.24p6)
K05X04M 2005 XM4 (arc=2 opp, H=19.6 ~407m) from ARO (Dec. 11.12-13p6)
K05B00C 2005 BC (arc=2 opp, H=17.9 ~891m) from PJMSO (Dec. 12.43-44p5)
K04X14L 2004 XL14 (arc=3 opp, H=21.2 ~195m) from ARO (Dec. 11.34-35p3)
K03U34X 2003 UX34 (arc=4 opp, H=20.2 ~309m) from ARO (Dec. 11.35-36p3)
K01F09X 2001 FX9 (arc=4 opp, H=18.6 ~645m) from ARO (Dec. 11.34p6) and PJMSO (Dec. 12.35-36p5)
K00O00M 2000 OM (arc=3 opp, H=18.7 ~616m) from ARO (Dec. 11.23p3)
J94A01W 1994 AW1 (arc=3 opp, H=17.6 ~1.02 km) from El Guijo Obs. (Dec. 12.75-78p3)
04179 4179 Toutatis (1989 AC) from PJMSO (Dec. 12.41-42p5)

Observers on 13 December '08

Eight observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 36 in MPEC 2008-X82 -- 2008 XP2, 2008 XP, 2008 XO, 2008 XE2, 2008 XC1, 2008 XB2, 2008 XB1, 2008 XA2, 2008 WZ94, 2008 WL60, 2008 WL, 2008 WK96, 2008 WK60, 2008 WK, 2008 WH60, 2008 WD14, 2008 WB59, 2008 VN, 2008 VK14, 2008 VH14, 2008 UE7, 2008 UC95, 2008 SV7, 2008 SP7, 2008 RT26, 2008 NB, 2008 MZ, 2008 LW8, 2007 YZ, 2006 VB14, 2006 SZ217, 2005 XM4, 2004 XL14, 2003 UX34, 2001 FX9, 2000 OM
`J27`	El Guijo Obs. in Spain, 1 in MPEC 2008-X82 -- 1994 AW1
`J77`	Golden Hill Obs. in England, 1 in MPEC 2008-X82 -- 2008 XC1
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-X82 -- 2008 XE3
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2008-X82 -- 2008 UE7, 2008 UC95, 2005 BC, 2001 FX9, 4179
`204`	Schiaparelli Obs. in Italy, 7 in MPEC 2008-X82 -- 2008 XW2, 2008 XS, 2008 XM1, 2008 XA2, 2008 WE96, 2008 LW8, 2006 VB14
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-X82 -- 2008 XE3
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-X82 -- 2007 UW3

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

Impact Risk Monitoring on 13 December '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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

2008 XC1	NEODyS	2305	2085	1	1.22e-07	-6.46	-6.46	0	NEODyS: "Based on 139 optical observations (of which 1 are rejected as outliers) from 2008/12/03.369 to 2008/12/11.334."
2008 XC1	JPL Sentry	1456	2085-2088	2	1.3e-07	-6.44	-6.50	0	JPL: "Analysis based on 138 observations spanning 7.9652 days (2008-Dec-03.36799 to 2008-Dec-11.3332)." Diameter approximately 0.063 km. from mean, weighted H=23.7.

2008 WK96	JPL Sentry	1456	2024-2031	2	6.4e-05	-2.74	-2.74	0	JPL: "Analysis based on 34 observations spanning 10.892 days (2008-Nov-30.38762 to 2008-Dec-11.27913)." Diameter approximately 0.085 km. from mean, weighted H=23.0.
2008 WK96	NEODyS	1456	2024-2031	2	6.26e-05	-2.75	-2.75	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/11/30.388 to 2008/12/11.280."

Legend: VI# = VI count, Prob Cum = cumulative probability, PS Cum/Max = cumulative/maximum Palermo Scale, TS = Torino Scale

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 13 December '08

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

2305	Noted that NEODyS has reposted 2008 XC1 as an impact risk - see above
1456	Noted that JPL Sentry has updated its 2008 WK96 risk assessment - see above Noted that NEODyS has updated its 2008 WK96 risk assessment - see above Noted that JPL Sentry has updated its 2008 XC1 risk assessment - see above Grabbed MPEC 2008-X82 - Daily Orbit Update - see above

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