2008-12-27 Tracking News

Contents on 27 December '08

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- three MPECs
Observers -- 26 observing facilities
Impact Risk Monitoring -- three 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 27 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 2359 UTC). It was last noted active yesterday.

New MPECs on 27 December '08

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-Y55 time-stamped "05:28 UT" - Comet C/2008 X3 (LINEAR) - see below
MPEC 2008-Y56 time-stamped "07:06 UT" - Daily Orbit Update - see below
MPEC 2008-Y57 time-stamped "23:46 UT" - Comet P/2008 X1 (Hill)

MPEC 2008-Y57 - "23:46 UT" - Comet P/2008 X1 (Hill)

PK08X010 P/2008 X1 (Hill) (q=2.362 AU, Q=4.773 AU, TP=2009 May 7.973 TT) from Kitami Obs. (Dec. 6.54-58p3), Hadano Obs. (Dec. 6.61-62p3), Table Mtn. Obs. (Dec. 21.19-21p4), Vega del Thader Obs. (Dec. 21.94-95p3), Remanzacco Obs. (Dec. 21.97p2), Craigie Obs. (Dec. 22.66p1 & 23.64-65p4), Montcabre Obs. (Dec. 23.82p2), Schiaparelli Obs. (Dec. 24.00p1), and Farm Cove Obs. (Dec. 26.58-59p3)

<< DOU on 27 Dec. '08 >> MPEC 2008-Y56 - "07:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08Y03J 2008 YJ3 (arc=4 days, H=20.1 ~323m) from Schiaparelli Obs. (Dec. 23.98p1 & 24.04p1), Astronomical Research Obs. (ARO) (Dec. 25.08-10p3), and Mt. John Obs. (Dec. 26.44-45p5)
K08Y03C 2008 YC3 (small asteroid, arc=5 days, H=25.5 ~27m) from Schiaparelli Obs. (Dec. 23.96p2) and Great Shefford Obs. (Dec. 26.77-80p4)
K08Y02N 2008 YN2 (small asteroid, arc=6 days, H=26.2 ~19m) from Great Shefford Obs. (Dec. 26.86-92p3)
Observations of recently (no longer) risk-listed objects
K08X02P 2008 XP2 (arc=20 days, H=18.6 ~645m) from ARO (Dec. 25.36-37p4)
K08X00N 2008 XN (arc=24 days, H=21.3 ~186m) from Desert Moon Obs. (Dec. 26.07-14p3)
K08W63Q 2008 WQ63 (arc=32 days, H=20.0 ~339m) from Hamamatsu-Yuto Obs. (Dec. 23.75-80p7)
Observations of small asteroids (H>22.0)
K08Y02Q 2008 YQ2 (arc=5 days, H=24.8 ~37m) from ARO (Dec. 25.34-35p6) and Great Shefford Obs. (Dec. 26.74-76p3)
K08Y02M 2008 YM2 (arc=6 days, H=23.9 ~56m) from Great Shefford Obs. (Dec. 26.98-99p2)
K07U01Y 2007 UY1 (arc=2 opp, H=22.8 ~93m) from ARO (Dec. 25.31-32p5) and Naef Obs. (Dec. 26.95-97p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K08Y03G 2008 YG3 (arc=4 days, H=21.9 ~141m) from Schiaparelli Obs. (Dec. 23.99p2 & 24.06-07p2)
Observations of other objects
K08Y03F 2008 YF3 (arc=3 days, H=21.1 ~204m) from Schiaparelli Obs. (Dec. 24.01-02p2 & 24.13-14p2)
K08Y03E 2008 YE3 (arc=3 days, H=20.7 ~245m) from Schiaparelli Obs. (Dec. 24.17-18p3) and ARO (Dec. 25.32-33p7)
K08Y02K 2008 YK2 (arc=7 days, H=19.5 ~426m) from Hamamatsu-Yuto Obs. (Dec. 23.70-75p6 & 26.63-66p3), ARO (Dec. 25.26-31p12), Verona Obs. (Dec. 26.91-92p4), and Peschiera del Garda Obs. (Dec. 27.00-01p4)
K08Y00F 2008 YF (arc=7 days, H=21.0 ~214m) from ARO (Dec. 25.35p6)
K08X03E 2008 XE3 (Q=4.045 AU, arc=2 opp, H=16.2 ~1.95 km) from ARO (Dec. 25.30p5) and Naef Obs. (Dec. 26.94-97p2)
K08X02V 2008 XV2 (arc=19 days, H=20.3 ~295m) from Stia Obs. (Dec. 24.83-85p3)
K08W60L 2008 WL60 (arc=30 days, H=18.1 ~812m) from Hamamatsu-Yuto Obs. (Dec. 23.63-68p6)
K08W59B 2008 WB59 (arc=33 days, H=19.4 ~446m) from Guidestar Obs. (Dec. 26.80-83p3)
K08W02N 2008 WN2 (arc=63 days, H=20.8 ~234m) from Eschenberg Obs. (Dec. 26.80p3)
K08V14K 2008 VK14 (arc=49 days, H=19.3 ~467m) from Verona Obs. (Dec. 19.90-91p4 & 26.93-95p4)
K08V04U 2008 VU4 (Q=4.210 AU, arc=49 days, H=17.6 ~1.02 km) from Guidestar Obs. (Dec. 26.75-78p3)
K08U07E 2008 UE7 (arc=60 days, H=20.4 ~282m) from ARO (Dec. 25.44-45p6)
K08S82H 2008 SH82 (arc=92 days, H=21.3 ~186m) from Schiaparelli Obs. (Dec. 25.82p4), Hamamatsu-Yuto Obs. (Dec. 26.50-56p3), Eschenberg Obs. (Dec. 26.77p7), Peschiera del Garda Obs. (Dec. 26.82-84p5), and Verona Obs. (Dec. 26.86-87p4)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from Hamamatsu-Yuto Obs. (Dec. 23.58-60p5), Fiamene Obs. (Dec. 26.85p2), Verona Obs. (Dec. 26.87-88p4), Peschiera del Garda Obs. (Dec. 26.90-97p4), and Mirasteilas Obs. (Dec. 26.95-96p3)
K08R26T 2008 RT26 (arc=109 days, H=19.4 ~446m) from ARO (Dec. 25.28p3)
K08M00Z 2008 MZ (Q=4.207 AU, arc=194 days, H=18.6 ~645m) from Eschenberg Obs. (Dec. 26.83-84p3) and Fiamene Obs. (Dec. 26.86-87p2)
K08E05V 2008 EV5 (arc=2 opp, H=20.2 ~309m) from ARO (Dec. 25.33p6) and Naef Obs. (Dec. 26.98-01p9)
K07V08L 2007 VL8 (arc=2 opp, H=21.3 ~186m) from Bergen-Enkheim Obs. (Dec. 25.88p1 & 25.93-94p2)
K07M13K 2007 MK13 (arc=3 opp, H=20.0 ~339m) from ARO (Dec. 25.38-39p5)
K06W04E 2006 WE4 (IEO, Q=0.928 AU, arc=2 opp, H=18.8 ~589m) from ARO (Dec. 25.49-50p6)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from ARO (Dec. 25.47-48p4)
K06W02Y 2006 WY2 (arc=3 opp, H=18.5 ~676m) from ARO (Dec. 26.13-14p3)
K06SL7X 2006 SX217 (arc=3 opp, H=18.8 ~589m) from ARO (Dec. 25.39-40p4)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from Fiamene Obs. (Dec. 26.88-89p4)
K05S71B 2005 SB71 (arc=2 opp, H=21.1 ~204m) from David Tholen's team on Mauna Kea (Nov. 20.53-54p3 at R=22.5)
K05N01J 2005 NJ1 (arc=4 opp, H=18.7 ~616m) from ARO (Dec. 25.40-41p4)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from ARO (Dec. 25.37-38p6)
K04Q16V 2004 QV16 (arc=3 opp, H=18.1 ~812m) from Mt. John Obs. (Dec. 26.63-64p4)
K04L03V 2004 LV3 (arc=2 opp, H=18.8 ~589m) from Hamamatsu-Yuto Obs. (Dec. 26.41-45p5) and Eschenberg Obs. (Dec. 26.79p7)
K03X22B 2003 XB22 (arc=3 opp, H=19.2 ~490m) from ARO (Dec. 25.29p2)
K02X90P 2002 XP90 (arc=3 opp, H=18.4 ~708m) from ARO (Dec. 25.43-44p4)
K02V94Y 2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.8 ~1.48 km) from Eschenberg Obs. (Dec. 26.78p3) and Fiamene Obs. (Dec. 26.85-86p4)
K02N16W 2002 NW16 (arc=2 opp, H=18.0 ~851m) from ARO (Dec. 25.42-43p4)
K01W01T 2001 WT1 (arc=3 opp, H=19.8 ~371m) from Naef Obs. (Dec. 26.98p1)
K01V05K 2001 VK5 (arc=5 opp, H=17.8 ~933m) from Schiaparelli Obs. (Dec. 25.80-81p2)
K01F09X 2001 FX9 (arc=4 opp, H=18.6 ~645m) from ARO (Dec. 25.31-32p6)
K00F01L 2000 FL1 (i=43.6°, Q=4.178 AU, arc=2 opp, H=15.4 ~2.82 km, q=1.291 AU) from Hamamatsu-Yuto Obs. (Dec. 23.81-86p7) and ARO (Dec. 25.48-49p6)
K00E14D 2000 ED14 (q=0.362 AU, arc=2 opp, H=20.8 ~234m) from Bergen-Enkheim Obs. (Dec. 26.08-16p3)
K0840 200840 2001 XN254 from Mirasteilas Obs. (Dec. 26.96-97p3)
G2361 162361 2000 AF6 from Fiamene Obs. (Dec. 26.91p6)
89355 89355 2001 VS78 from Fiamene Obs. (Dec. 26.92p4)
02368 2368 Beltrovata (1977 RA) from Mirasteilas Obs. (Dec. 26.98-99p3)

MPEC 2008-Y55 - "05:28 UT" - Comet C/2008 X3 (LINEAR)

CK08X030 C/2008 X3 (LINEAR) (i=66.5°, q=1.902 AU, Q=82.384 AU, TP=2008 Oct. 10.586 TT) from Hadano Obs. (Dec. 6.79-81p4), Schiaparelli Obs. (Dec. 8.16p1, 8.22p1, 22.14p1 & 22.23p1), Ageo Obs. (Dec. 23.79p3), and Petit Jean Mtn. South Obs. (PJMSO) (Dec. 25.47-48p7)

Observers on 27 December '08

A total of 26 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 1 in MPEC 2008-Y55 -- C/2008 X3
`H55`	Astronomical Research Obs. (ARO) in Illinois, 23 in MPEC 2008-Y56 -- 2008 YQ2, 2008 YK2, 2008 YJ3, 2008 YF, 2008 YE3, 2008 XP2, 2008 XE3, 2008 UE7, 2008 RT26, 2008 EV5, 2007 UY1, 2007 MK13, 2006 WZ2, 2006 WY2, 2006 WE4, 2006 SX217, 2005 NJ1, 2005 BC, 2003 XB22, 2002 XP90, 2002 NW16, 2001 FX9, 2000 FL1
`A74`	Bergen-Enkheim Obs. in Germany, 2 in MPEC 2008-Y56 -- 2007 VL8, 2000 ED14
`321`	Craigie Obs., 1 in MPEC 2008-Y57 -- P/2008 X1
`448`	Desert Moon Obs. in New Mexico, 1 in MPEC 2008-Y56 -- 2008 XN
`151`	Eschenberg Obs. in Switzerland, 5 in MPEC 2008-Y56 -- 2008 WN2, 2008 SH82, 2008 MZ, 2004 LV3, 2002 VY94
`E85`	Farm Cove Obs. in New Zealand, 1 in MPEC 2008-Y57 -- P/2008 X1
`B23`	Fiamene Obs. in Italy, 6 in MPEC 2008-Y56 -- 2008 SQ1, 2008 MZ, 2005 TZ51, 2002 VY94, 89355, 162361
`J95`	Great Shefford Obs. in England, 4 in MPEC 2008-Y56 -- 2008 YQ2, 2008 YN2, 2008 YM2, 2008 YC3
`A17`	Guidestar Obs. in Germany, 2 in MPEC 2008-Y56 -- 2008 WB59, 2008 VU4
`355`	Hadano Obs. in Japan, 2 in MPECs 2008-Y55 & 2008-Y57 -- C/2008 X3, P/2008 X1
`379`	Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2008-Y56 -- 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SQ1, 2008 SH82, 2004 LV3, 2000 FL1
`400`	Kitami Obs. in Japan, 1 in MPEC 2008-Y57 -- P/2008 X1
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-Y56 -- 2005 SB71
`B67`	Mirasteilas Obs. in Switzerland, 3 in MPEC 2008-Y56 -- 2008 SQ1, 200840, 2368
`213`	Montcabre Obs. in Spain, 1 in MPEC 2008-Y57 -- P/2008 X1
`474`	Mt. John Obs. in New Zealand, 2 in MPEC 2008-Y56 -- 2008 YJ3, 2004 QV16
`A13`	Naef Obs. in Switzerland, 4 in MPEC 2008-Y56 -- 2008 XE3, 2008 EV5, 2007 UY1, 2001 WT1
`A53`	Peschiera del Garda Obs. in Italy, 3 in MPEC 2008-Y56 -- 2008 YK2, 2008 SQ1, 2008 SH82
`H45`	Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2008-Y55 -- C/2008 X3
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-Y57 -- P/2008 X1
`204`	Schiaparelli Obs. in Italy, 9 in MPECs 2008-Y55, 2008-Y56 & 2008-Y57 -- 2008 YJ3, 2008 YG3, 2008 YF3, 2008 YE3, 2008 YC3, C/2008 X3, P/2008 X1, 2008 SH82, 2001 VK5
`A78`	Stia Obs. in Italy, 1 in MPEC 2008-Y56 -- 2008 XV2
`673`	Table Mtn. Obs. in southern California, 1 in MPEC 2008-Y57 -- P/2008 X1
`J70`	Vega del Thader Obs. in Spain, 1 in MPEC 2008-Y57 -- P/2008 X1
`A48`	Verona Obs. in Italy, 4 in MPEC 2008-Y56 -- 2008 YK2, 2008 VK14, 2008 SQ1, 2008 SH82

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

Impact Risk Monitoring on 27 December '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 YJ3	NEODyS	1536	R E M O V E D						-
2008 YJ3	JPL Sentry	1536	R E M O V E D						JPL: Risk listing removed at 0951 UTC.

2008 YC3	JPL Sentry	1536	2090-2100	3	7.2e-09	-8.78	-8.90	0	JPL: "Analysis based on 18 observations spanning 4.5467 days (2008-Dec-22.25277 to 2008-Dec-26.79945)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
2008 YC3	NEODyS	1536	R E M O V E D						-

2008 YN2	JPL Sentry	1536	R E M O V E D						JPL: Risk listing removed at 0955 UTC.

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 27 December '08

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

2359	Grabbed MPEC 2008-Y57 - Comet P/2008 X1 (Hill) - see above
1536	Noted that JPL Sentry has updated its 2008 YC3 risk assessment - see above Noted that NEODyS has removed 2008 YC3 as an impact risk - see above Noted that JPL Sentry has removed 2008 YJ3 as an impact risk - see above Noted that NEODyS has removed 2008 YJ3 as an impact risk - see above Noted that JPL Sentry has removed 2008 YN2 as an impact risk - see above Grabbed MPEC 2008-Y56 - Daily Orbit Update - see above
0535	Grabbed MPEC 2008-Y55 - Comet C/2008 X3 (LINEAR) - see above

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