Contents  on 24 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 24 May '09

The MPC's NEO Confirmation Page has 6 listings: 2 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and four updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of ten 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 24 May '09

Minor Planet Electronic Circulars

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

MPEC 2009-K42 - "23:04 UT" - 2009 KG3

MPEC 2009-K41 - "23:01 UT" - 2009 KE3

MPEC 2009-K40 - "22:58 UT" - 2009 KD3

MPEC 2009-K39 - "22:54 UT" - 2009 KC3

MPEC 2009-K38 - "22:51 UT" - 2008 KP

MPEC 2009-K37 - "21:16 UT" - Comet C/2009 F1 (Larson)

<< DOU on 24 May '09 >>  MPEC 2009-K36 - "06:07 UT" - Daily Orbit Update

Observers  on 24 May '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2009-K36 -- 2009 KN, 2009 KM, 2009 KK, 2009 KJ, 2009 HV58, 2009 HF88, 2009 HC82, 2009 HC, 2009 CA2, 2008 YE29, 2002 AD2, 211871
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-K36 -- 2002 MQ3
I77CEAMIG-REA in Brazil, 2 in MPECs 2009-K39 & 2009-K40 -- 2009 KD3, 2009 KC3
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-K36 -- 2009 JM2, 86666
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2009-K36 -- 2008 JV19
J95Great Shefford Obs. in England, 1 in MPEC 2009-K36 -- 2009 KY1
E16Grove Creek Obs. in New South Wales, 2 in MPECs 2009-K39 & 2009-K40 -- 2009 KD3, 2009 KC3
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-K38 -- 2008 KP
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-K42 -- 2009 KG3
J47Nazaret Obs. in Spain, 1 in MPEC 2009-K37 -- C/2009 F1
473Remanzacco Obs. in Italy, 1 in MPEC 2009-K37 -- C/2009 F1
I20Rio Cuarto Obs. in Argentina, 3 in MPEC 2009-K36 -- 2009 KY1, 2009 DL1, 2005 HN3
145S-Gravenwezel Obs. in Belgium, 1 in MPEC 2009-K36 -- 2009 JM2
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-K42 -- 2009 KG3
204Schiaparelli Obs. in Italy, 7 in MPECs 2009-K36 & 2009-K37 -- 2009 KY1, 2009 KL, 2009 KJ, 2009 JM2, 2009 JG2, C/2009 F1, 138883
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPECs 2009-K36, 2009-K39, 2009-K40 & 2009-K41 -- 2009 KW2, 2009 KE3, 2009 KD3, 2009 KC3, 4957
587Sormano Obs. in Italy, 4 in MPEC 2009-K36 -- 2009 KY1, 2009 KV2, 2009 KJ, 2009 HD21
611Starkenburg Obs. in Germany, 1 in MPEC 2009-K42 -- 2009 KG3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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 Sentry1510209112.7e-07-4.05-4.050JPL: "Analysis based on 51 observations spanning 5.8826 days (2009-May-17.26047 to 2009-May-23.14307)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2009 KKJPL Sentry15102022-203963.3e-05-1.64-1.661JPL: "Analysis based on 65 observations spanning 5.8695 days (2009-May-17.25987 to 2009-May-23.12933)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS15102022-203863.27e-05-1.64-1.661NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/23.130. NOTE: The Virtual Impactor in 2022/05/29.768 ... is rated as Torino Scale 1."
2009 HCJPL Sentry15102095-209851.0e-06-6.35-6.490JPL: "Analysis based on 143 observations spanning 35.932 days (2009-Apr-17.23164 to 2009-May-23.16322)." 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 24 May '09

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

2358Grabbed MPEC 2009-K38 - 2008 KP - see above
Grabbed MPEC 2009-K39 - 2009 KC3 - see above
Grabbed MPEC 2009-K40 - 2009 KD3 - see above
Grabbed MPEC 2009-K41 - 2009 KE3 - see above
Grabbed MPEC 2009-K42 - 2009 KG3 - see above
2150Grabbed MPEC 2009-K37 - Comet C/2009 F1 (Larson) - see above
1510Noted that JPL Sentry has updated its 2009 HC risk assessment - see above
Noted that JPL Sentry has updated its 2009 KK 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
Grabbed MPEC 2009-K36 - Daily Orbit Update - see above