Contents  on 22 May '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 22 May '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of two listings on the NEOCP at some point today.

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 22 May '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-K28 - "16:06 UT" - 2009 KV2

<< DOU on 22 May '09 >>  MPEC 2009-K27 - "06:08 UT" - Daily Orbit Update

Observers  on 22 May '09

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 24 in MPECs 2009-K27 & 2009-K28 -- 2009 KY1, 2009 KV2, 2009 KN, 2009 KM, 2009 KL, 2009 KK, 2009 KJ, 2009 JR5, 2009 JM2, 2009 HK73, 2009 HG60, 2009 HG, 2009 HC21, 2009 HC, 2009 BJ81, 2008 OS9, 2007 LL, 2006 YN, 2006 HR29, 2001 YP2, 2001 SG286, 24761, 162854, 154244
I32Beta Orionis Obs. in Argentina, 1 in MPEC 2009-K27 -- 207945
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-K27 -- 7977
I21El Condor Obs. in Argentina, 4 in MPEC 2009-K27 -- 2002 LT38, 207945, 143651, 136617
J95Great Shefford Obs. in England, 1 in MPEC 2009-K28 -- 2009 KV2
704LINEAR in New Mexico, 3 in MPECs 2009-K27 & 2009-K28 -- 2009 KV2, 2009 HV77, 3988
J75La Sagra Obs. in Spain, 2 in MPEC 2009-K27 -- 2009 KY1, 2008 WN2
932McCarthy Obs. in Connecticut, 3 in MPECs 2009-K27 & 2009-K28 -- 2009 KV2, 2009 KM, 2009 KK
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPEC 2009-K27 -- 2009 JR, 2009 JM2, 2009 JK1, 2009 JG1, 2009 HD21, 2009 BL2, 2008 JV19, 2000 FL1
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2009-K28 -- 2009 KV2
D29Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 2 in MPEC 2009-K27 -- 214088, 138911
434San Benedetto Po Obs. in Italy, 2 in MPEC 2009-K27 -- 2009 JM2, 3103
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-K28 -- 2009 KV2
B76Schonfeld Obs. in Germany, 1 in MPEC 2009-K27 -- 2009 JM2
G68Sierra Stars Obs. in northern California, 1 in MPEC 2009-K27 -- 4015
B40Skylive Obs. in Italy, 3 in MPEC 2009-K27 -- 159399, 14402, 138883
587Sormano Obs. in Italy, 3 in MPEC 2009-K27 -- 2009 KK, 2009 JR, 2009 JG2
A97Stammersdorf Obs. in Austria, 1 in MPEC 2009-K27 -- 143651
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-K28 -- 2009 KV2
G56Walnut Creek Obs. in northern California, 2 in MPEC 2009-K27 -- 2009 JM2, 1998 SC15
J08Zonalunar Obs. in Spain, 2 in MPEC 2009-K27 -- 5693, 5620
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 May '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.
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 KMJPL Sentry1314209112.9e-07-4.01-4.010JPL: "Analysis based on 44 observations spanning 4.9258 days (2009-May-17.26047 to 2009-May-22.18624)." Diameter approximately 0.320 km. from mean, weighted H=20.1.
NEODyS1314R E M O V E D-
2009 KKJPL Sentry14062022-204993.7e-05-1.58-1.651JPL: "Analysis based on 59 observations spanning 4.8387 days (2009-May-17.25987 to 2009-May-22.09862)." Diameter approximately 0.271 km. from mean, weighted H=20.5.
NEODyS13142022-203983.67e-05-1.58-1.660NEODyS: "Based on 59 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/22.099."
2009 HCJPL Sentry13142095-209961.0e-06-6.37-6.560JPL: "Analysis based on 139 observations spanning 33.959 days (2009-Apr-17.23164 to 2009-May-21.19052)." Diameter approximately 0.037 km. from mean, weighted H=24.8.

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 22 May '09

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

1619Grabbed MPEC 2009-K28 - 2009 KV2 - see above
1406Noted that JPL Sentry has updated its 2009 KK risk assessment - see above
1314Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that NEODyS has updated its 2009 KK risk assessment - see above
Noted that JPL Sentry has updated its 2009 KM risk assessment - see above
Noted that NEODyS has removed 2009 KM as an impact risk - see above
Grabbed MPEC 2009-K27 - Daily Orbit Update - see above