Contents  on 5 January '10


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.

NEOCP Activity  on 5 January '10

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. 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.

New MPECs  on 5 January '10

Minor Planet Electronic Circulars

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

MPEC 2010-A15 - "17:46 UT" - 2007 FL1

<< DOU on 5 Jan. '10 >>  MPEC 2010-A14 - "07:09 UT" - Daily Orbit Update

Observers  on 5 January '10

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 22 in MPEC 2010-A14 -- 2009 YG, 2009 XR2, 2009 XO2, 2009 XO, 2009 XF2, 2009 XC2, 2009 WZ104, 2009 WM139, 2009 WL6, 2009 WF, 2009 WD106, 2009 VO24, 2009 UK, 2009 SO103, 2009 SC229, 2009 NH, 2009 ML1, 2008 YZ32, 2007 UR3, 2004 XM35, 2002 WP, 1993 RA
215Buchloe Obs. in Germany, 1 in MPEC 2010-A14 -- 2009 WZ104
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-A14 -- 2005 YU3
448Desert Moon Obs. in New Mexico, 3 in MPEC 2010-A14 -- 2009 XR2, 2009 WF, 2009 VO24
F651UKAPP in Northern Ireland via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-A14 -- 2009 YS6
704LINEAR in New Mexico, 6 in MPEC 2010-A14 -- 2005 YU3, 2002 XN14, 2002 NW16, 2001 BP61, 5646, 2212
H12LightBuckets Obs. Mayhill in New Mexico, 1 in MPEC 2010-A14 -- 25143
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-A15 -- 2007 FL1
J93Mt. Tuffley Obs. in England, 4 in MPEC 2010-A14 -- 2007 MK13, 2005 MC, 159402, 433
H23Pear Tree Obs. in Florida, 1 in MPEC 2010-A14 -- 2007 MK13
E12Siding Spring Survey in New South Wales, 1 in MPEC 2010-A14 -- 2009 UN3
G68Sierra Stars Obs. in northern California, 1 in MPEC 2010-A14 -- 2009 KL2
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2010-A14 -- 2009 YV6, 2009 XP7, 2009 WT25, 2009 WK6, 2009 US87, 2009 UK, 2009 UD2, 2009 SN98
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 January '10

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.
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.





Notes for Today's Latest Risk Assessments
2009 YS6JPL Sentry1544R E M O V E DJPL: Risk listing removed at 0938 UTC.
NEODyS1544R E M O V E D-
2009 YGJPL Sentry1544R E M O V E DJPL: Risk listing removed at 0951 UTC.
NEODyS1544R E M O V E D-
2009 XOJPL Sentry1544203811.2e-07-4.38-4.380JPL: "Analysis based on 137 observations spanning 26.210 days (2009-Dec-09.152 to 2010-Jan-04.362462)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
NEODyS15442038-207321.25e-07-4.38-4.380NEODyS: "Based on 137 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/04.363."

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 5 January '10

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

1805Grabbed MPEC 2010-A15 - 2007 FL1 - see above
1544Noted that JPL Sentry has updated its 2009 XO risk assessment - see above
Noted that NEODyS has updated its 2009 XO risk assessment - see above
Noted that JPL Sentry has removed 2009 YG as an impact risk - see above
Noted that NEODyS has removed 2009 YG as an impact risk - see above
Noted that JPL Sentry has removed 2009 YS6 as an impact risk - see above
Noted that NEODyS has removed 2009 YS6 as an impact risk - see above
Grabbed MPEC 2010-A14 - Daily Orbit Update - see above
Noted that the NEOCP has become active