Contents  on 16 January '09


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 16 January '09

The MPC's NEO Confirmation Page has 19 listings: 5 new, 14 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five new and fourteen updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of 20 objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 16 January '09

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 2009-B02 - "17:10 UT" - 2007 RT9

<< DOU on 16 Jan. '09 >>  MPEC 2009-B01 - "07:05 UT" - Daily Orbit Update

Observers  on 16 January '09

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
432Boambee Obs. in New South Wales, 4 in MPEC 2009-B01 -- 2006 SZ217, 2006 BQ147, 8035, 4257
493Calar Alto Obs. in Spain, 2 in MPEC 2009-B01 -- 2008 WL60, 2008 QT3
B84Cyclops Obs. in The Netherlands, 3 in MPEC 2009-B01 -- 2008 YK2, 2008 YF, 2008 EV5
448Desert Moon Obs. in New Mexico, 6 in MPEC 2009-B01 -- 2008 YZ32, 2008 YX32, 2008 YU30, 2008 YR27, 2008 XE2, 2008 SV11
J27El Guijo Obs. in Spain, 1 in MPEC 2009-B01 -- 142348
704LINEAR in New Mexico, 11 in MPEC 2009-B01 -- 2008 YG3, 2007 UY1, 2007 MK13, 2003 YO1, 2001 OE84, 31221, 198856, 162900, 141765, 1916, 1863
560Madonna di Dossobuono Obs. in Italy, 5 in MPEC 2009-B01 -- 2008 YG26, 2008 SQ1, 2008 SH82, 2008 EV5, 2003 XB22
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2009-B01 -- 22753, 162900, 162361, 142348
D29Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-B01 -- 154715
H06\B. Conklin via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-B01 -- 22099
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2009-B01 & 2009-B02 -- 2009 AM15, 2009 AK15, 2008 VF, 2008 SO1, 2008 OB9, 2007 RT9
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2009-B01 -- 2006 AS2, 22753, 204131, 175114, 159923, 8013, 4179
291Spacewatch 1.8m telescope in Arizona, 18 in MPEC 2009-B01 -- 2009 AL15, 2009 AL, 2008 YW32, 2008 YU32, 2008 YT30, 2008 YS27, 2008 YM27, 2008 YM2, 2008 YJ3, 2008 YG29, 2008 YD29, 2008 XM, 2008 AV28, 2006 TN, 2006 SO19, 2001 XF1, 2001 FA1, 2000 DV110
H53Thompsonville Obs. in Illinois, 9 in MPEC 2009-B01 -- 2008 QT3, 2006 AS2, 89355, 194386, 162900, 141052, 4179, 1980, 1627
A92Urseanu Obs. in Romania, 1 in MPEC 2009-B01 -- 136849
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2009-B01 -- 89355
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 16 January '09

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.





Notes for Today's Latest Risk Assessments
2009 ALJPL Sentry14282057-210633.1e-07-5.16-5.360JPL: "Analysis based on 38 observations spanning 14.886 days (2009-Jan-01.29931 to 2009-Jan-16.18568)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
NEODyS14282057-209028.73e-08-5.45-5.580NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/16.186."
2008 YU32JPL Sentry1428R E M O V E DJPL: Risk listing removed at 0954 UTC.
NEODyS1428R E M O V E D-
2007 RT9JPL Sentry1858R E M O V E DJPL: Risk listing removed at 1853 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 16 January '09

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

1858Noted that JPL Sentry has removed 2007 RT9 as an impact risk - see above
1810Grabbed MPEC 2009-B02 - 2007 RT9 - see above
1428Noted that JPL Sentry has removed 2008 YU32 as an impact risk - see above
Noted that NEODyS has removed 2008 YU32 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
Noted that NEODyS has updated its 2009 AL risk assessment - see above
Grabbed MPEC 2009-B01 - Daily Orbit Update - see above