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Contents  on 22 December '09

Resources:

The latest A/CC news is available via framed access, RSS news feed 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.

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NEOCP Activity  on 22 December '09

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new listings. Both of these 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.

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New MPECs  on 22 December '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-Y43 - "21:50 UT" - Observations of Comets


MPEC 2009-Y42 - "21:20 UT" - Comet C/2009 U5 (Grauer)


<< DOU on 22 Dec. '09 >>  MPEC 2009-Y41 - "07:11 UT" - Daily Orbit Update

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Observers  on 22 December '09

A total of 52 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 12 in MPECs 2009-Y42 & 2009-Y43 -- C/2009 U5, P/2009 Q4, C/2008 S3, C/2008 Q3, C/2008 P1, C/2008 N1, C/2008 E1, C/2007 Q3, 222P, 203P, 43P, 30P
J10Alicante Obs. in Spain, 5 in MPEC 2009-Y43 -- 217P, 203P, 157P, 118P, 30P
J24Altamira Obs. in Spain, 5 in MPEC 2009-Y43 -- C/2007 Q3, C/2007 N3, 217P, 81P, 30P
A81Balzaretto Obs. in Italy, 2 in MPEC 2009-Y41 -- 2009 XD, 2002 WP
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-Y41 -- 2009 XT6
I32Beta Orionis Obs. in Argentina, 2 in MPEC 2009-Y43 -- 217P, 30P
B59Borken Obs. in Germany, 2 in MPEC 2009-Y43 -- C/2007 Q3, 29P
B96Brixiis Obs. in Belgium, 1 in MPEC 2009-Y43 -- C/2009 U3
215Buchloe Obs. in Germany, 1 in MPEC 2009-Y43 -- P/2009 W1
J02Busot Obs. in Spain, 4 in MPEC 2009-Y43 -- C/2007 N3, 217P, 118P, 31P
235CAST Obs. in Italy, 9 in MPEC 2009-Y43 -- C/2009 U3, P/2009 T2, C/2008 P1, C/2007 N3, 217P, 157P, 118P, 30P, 22P
B20Carmelita Obs. in Spain, 6 in MPEC 2009-Y43 -- P/2009 T2, C/2007 N3, 217P, 203P, 118P, 30P
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-Y43 -- C/2009 U3, 157P
A77Chante-Perdrix Obs. in France, 8 in MPEC 2009-Y43 -- C/2009 U3, C/2009 T3, C/2008 S3, C/2007 Q3, 228P, 157P, 47P, 29P
J01Cielo Profundo Obs. in Spain, 3 in MPEC 2009-Y43 -- C/2009 U3, C/2009 T3, 229P
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-Y43 -- P/2009 Q5
442Gualba Obs. in Spain, 1 in MPEC 2009-Y43 -- 29P
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-Y43 -- 217P
G92Jarnac Obs. in Arizona, 2 in MPEC 2009-Y43 -- C/2009 U3, 157P
415Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2009-Y43 -- C/2009 T1
585Kiev Comet Station in the Ukraine, 1 in MPEC 2009-Y43 -- C/2009 U3
352Konan Obs. in Japan, 2 in MPEC 2009-Y43 -- C/2007 N3, 30P
D95Kurihara Obs., 3 in MPEC 2009-Y43 -- 217P, 118P, 30P
704LINEAR in New Mexico, 14 in MPECs 2009-Y41 & 2009-Y43 -- C/2009 T3, P/2009 T2, P/2009 Q4, C/2008 S3, C/2007 N3, 2006 KZ37, 2002 XN14, 20790, 222P, 203P, 137P, 81P, 31P, 30P
J38La Vara Obs. in Spain, 12 in MPEC 2009-Y43 -- P/2009 T2, C/2008 P1, C/2007 Q3, C/2006 OF2, 217P, 157P, 118P, 88P, 81P, 30P, 29P, 22P
130Lumezzane Obs. in Italy, 1 in MPEC 2009-Y43 -- P/2008 J3
B82Maidbronn Obs. in Germany, 6 in MPEC 2009-Y43 -- C/2009 U3, C/2008 S3, C/2008 P1, P/2008 J3, C/2007 N3, 217P
C10Maisoncelles Obs. in France, 5 in MPEC 2009-Y43 -- C/2008 S3, C/2008 P1, C/2007 N3, 157P, 30P
232Masquefa Obs. in Spain, 7 in MPEC 2009-Y43 -- P/2009 W1, C/2007 Q3, 217P, 203P, 118P, 30P, 29P
A06Mataro Obs. in Spain, 6 in MPECs 2009-Y41 & 2009-Y43 -- P/2009 T2, 4015, 118P, 88P, 30P, 22P
932McCarthy Obs. in Connecticut, 1 in MPEC 2009-Y41 -- 2009 XR2
213Montcabre Obs. in Spain, 5 in MPEC 2009-Y43 -- P/2009 W1, P/2009 Q4, 217P, 118P, 81P
900Moriyama Obs. in Japan, 29 in MPECs 2009-Y41, 2009-Y42 & 2009-Y43 -- 2009 XR2, 2009 XD, P/2009 W1, P/2009 U6, C/2009 U5, C/2009 U3, C/2009 T3, P/2009 T2, P/2009 Q5, P/2009 Q4, C/2008 S3, C/2008 Q3, C/2007 VO53, C/2007 Q3, C/2007 N3, C/2007 G1, C/2006 OF2, 229P, 217P, 203P, 137P, 118P, 81P, 47P, 43P, 31P, 30P, 29P, 22P
J93Mt. Tuffley Obs. in England, 2 in MPEC 2009-Y43 -- 217P, 30P
J47Nazaret Obs. in Spain, 5 in MPEC 2009-Y43 -- P/2009 Q4, C/2007 N3, 118P, 81P, 30P
423North Ryde Obs. in New South Wales, 2 in MPEC 2009-Y43 -- C/2009 T1, C/2007 G1
D92Osaki Obs. in Japan, 1 in MPEC 2009-Y43 -- C/2007 VO53
H23Pear Tree Obs. in Florida, 1 in MPEC 2009-Y43 -- 229P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2009-Y43 -- P/2009 U6, C/2009 U3, P/2009 T2, P/2009 Q4, C/2008 S3, C/2008 Q3, C/2007 Q3, C/2006 OF2, C/2005 L3
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-Y43 -- 217P
473Remanzacco Obs. in Italy, 2 in MPEC 2009-Y43 -- C/2009 U3, 217P
939Rodeno Obs. in Spain, 14 in MPEC 2009-Y43 -- P/2009 T2, P/2009 Q4, C/2008 Q3, C/2007 Q3, C/2006 OF2, 217P, 203P, 157P, 118P, 88P, 81P, 43P, 30P, 22P
C09Rouet Obs. in France, 6 in MPEC 2009-Y43 -- C/2007 Q3, C/2006 OF2, 217P, 118P, 81P, 29P
619Sabadell Obs. in Spain, 3 in MPEC 2009-Y43 -- 217P, 157P, 30P
H36Sandlot Obs. in Kansas, 2 in MPEC 2009-Y41 -- 2009 YS, 2009 XK8
B74Santa Maria de Montmagastrell Obs. in Spain, 4 in MPEC 2009-Y43 -- C/2007 Q3, 88P, 81P, 43P
204Schiaparelli Obs. in Italy, 14 in MPECs 2009-Y41, 2009-Y42 & 2009-Y43 -- P/2009 W1, P/2009 U6, C/2009 U5, C/2009 U3, C/2009 T3, C/2008 Q3, C/2008 N1, C/2007 VO53, C/2007 Q3, C/2007 N3, 2007 HX4, 217P, 118P, 31P
691Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2009-Y41 & 2009-Y43 -- 2006 UR, 2004 KD1, 5693, 137P
H10Tzec Maun Obs. Mayhill in New Mexico, 5 in MPEC 2009-Y43 -- C/2008 E1, C/2005 L3, 217P, 203P, 81P
D25Tzec Maun Obs. Pingelly in Western Australia, 2 in MPEC 2009-Y43 -- C/2007 G1, 217P
H47Vicksburg Obs. in Mississippi, 11 in MPEC 2009-Y43 -- P/2009 T2, P/2009 Q4, C/2007 Q3, C/2006 OF2, 217P, 118P, 88P, 81P, 30P, 29P, 22P
B42Vitebsk Obs. in Belarus, 1 in MPEC 2009-Y43 -- 137P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 22 December '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: JPL at 2319 and NEODyS 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.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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
2009 YV6NEODyS1558203912.17e-09-6.37-6.370NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2009/12/20.384 to 2009/12/20.975."
2009 XT6JPL Sentry1558207119.2e-09-5.48-5.480JPL: "Analysis based on 80 observations spanning 7.6262 days (2009-Dec-13.4056 to 2009-Dec-21.03176)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
NEODyS1558R E M O V E D-

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.

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Chronology  on 22 December '09

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

2319Grabbed MPEC 2009-Y42 - Comet C/2009 U5 (Grauer) - see above
Grabbed MPEC 2009-Y43 - Observations of Comets - see above
1558Noted that JPL Sentry has reposted 2009 XT6 as an impact risk - see above
Noted that NEODyS has removed 2009 XT6 as an impact risk - see above
Noted that NEODyS has posted 2009 YV6 as an impact risk - see above
Grabbed MPEC 2009-Y41 - Daily Orbit Update - see above
0215Noted that the NEOCP has become active