Contents  on 2 June '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 2 June '09

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of five 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 2 June '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.

<< DOU on 2 June '09 >>  MPEC 2009-L06 - "06:10 UT" - Daily Orbit Update

MPEC 2009-L05 - "01:41 UT" - 2009 KJ22

Observers  on 2 June '09

Seventeen observing facilities appear in today's MPECs.

CodeObserver / observatory
I08Alianza S4 Obs. in Argentina, 1 in MPEC 2009-L05 -- 2009 KJ22
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2009-L06 -- 2009 KY1, 2009 KM, 2009 KK, 2009 KE5, 2009 KD5, 2009 KC7, 2009 JL1
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2009-L06 -- 212546, 194386, 162181
703Catalina Sky Survey in Arizona, 1 in MPEC 2009-L06 -- 2006 SU19
B84Cyclops Obs. in The Netherlands, 1 in MPEC 2009-L06 -- 3103
448Desert Moon Obs. in New Mexico, 6 in MPEC 2009-L06 -- 2009 KV2, 2009 KJ, 2009 KC7, 2009 JL1, 2009 JG1, 2009 HB82
I21El Condor Obs. in Argentina, 3 in MPEC 2009-L06 -- 194386, 143651, 136617
J95Great Shefford Obs. in England, 2 in MPECs 2009-L05 & 2009-L06 -- 2009 LA, 2009 KJ22
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-L06 -- 2009 JM2
704LINEAR in New Mexico, 1 in MPEC 2009-L06 -- 184990
J75La Sagra Obs. in Spain, 2 in MPEC 2009-L06 -- 2009 KJ22, 2009 KD5
900Moriyama Obs. in Japan, 1 in MPEC 2009-L06 -- 2009 JM2
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-L06 -- 2009 JM2
A13Naef Obs. in Switzerland, 4 in MPEC 2009-L06 -- 2009 KL2, 2002 LV, 2000 OB22, 15745
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2009-L06 -- 2009 KL2, 2009 HV44, 2005 MO13, 2002 LV, 2000 OB22, 2000 KN44, 1998 SC15
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-L06 -- 2009 JR
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2009-L06 -- 194386
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 June '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 KT21NEODyS13272016-2090821.73e-08-4.32-5.000NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/05/29.309 to 2009/06/01.352."
2009 KMJPL Sentry1327R E M O V E DJPL: Risk listing removed at 0852 UTC.
2009 KKNEODyS1327202218.85e-05-1.21-1.211NEODyS: "Based on 89 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/06/01.147. NOTE: The Virtual Impactor in 2022/05/29.761 ... is rated as Torino Scale 1."

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 2 June '09

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

1327Noted that NEODyS has updated its 2009 KK risk assessment - see above
Noted that JPL Sentry has removed 2009 KM as an impact risk - see above
Noted that NEODyS has posted 2009 KT21 as an impact risk - see above
Grabbed MPEC 2009-L06 - Daily Orbit Update - see above
Noted that the NEOCP has become active
0235Grabbed MPEC 2009-L05 - 2009 KJ22 - see above
Noted that the NEOCP has become empty