Contents  on 28 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 28 May '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 six 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 28 May '09

Minor Planet Electronic Circulars

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

MPEC 2009-K65 - "18:33 UT" - Comet 126P/IRAS

MPEC 2009-K64 - "17:27 UT" - 2009 KM7

MPEC 2009-K63 - "15:21 UT" - Comet C/2009 K4 (Gibbs)

MPEC 2009-K62 - "14:44 UT" - Comet C/2009 K3 (Beshore)

<< DOU on 28 May '09 >>  MPEC 2009-K61 - "06:08 UT" - Daily Orbit Update

MPEC 2009-K60 - "01:32 UT" - 2009 KC7

Observers  on 28 May '09

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2009-K63 -- C/2009 K4
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2009-K61 -- 2009 JM2
A81Balzaretto Obs. in Italy, 2 in MPEC 2009-K61 -- 2009 JM2, 143651
I32Beta Orionis Obs. in Argentina, 2 in MPEC 2009-K61 -- 2002 LT38, 136617
B88Bigmuskie Obs. in Italy, 1 in MPEC 2009-K61 -- 85867
B09Capannoli Obs. in Italy, 2 in MPEC 2009-K61 -- 85989, 213869
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2009-K61 & 2009-K63 -- C/2009 K4, 2006 KZ37, 85989, 27346
693Catalina Station in Arizona, 2 in MPECs 2009-K63 & 2009-K64 -- 2009 KM7, C/2009 K4
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-K60 -- 2009 KC7
J75La Sagra Obs. in Spain, 1 in MPEC 2009-K61 -- 2009 KD5
540Linz Obs. in Austria, 1 in MPEC 2009-K61 -- 2009 KK
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2009-K62 & 2009-K64 -- 2009 KM7, C/2009 K3
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-K61 -- 7088
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2009-K60, 2009-K62 & 2009-K63 -- 2009 KC7, C/2009 K4, C/2009 K3
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-K63 -- C/2009 K4
D21Shenton Park Obs. in Western Australia, 2 in MPEC 2009-K61 -- 2009 KD5, 2008 CM
E12Siding Spring Survey in New South Wales, 1 in MPEC 2009-K61 -- 2005 LY19
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2009-K61 & 2009-K64 -- 2009 KM7, 142781
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-K64 -- 2009 KM7
A71Stixendorf Obs. in Austria, 1 in MPEC 2009-K63 -- C/2009 K4
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-K63 -- C/2009 K4
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-K65 -- 126P
J08Zonalunar Obs. in Spain, 1 in MPEC 2009-K61 -- 89355
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 KD5JPL Sentry1319R E M O V E DJPL: Risk listing removed at 0853 UTC.
2009 KKJPL Sentry19122022-203843.8e-05-1.56-1.561JPL: "Analysis based on 75 observations spanning 8.9603 days (2009-May-17.25987 to 2009-May-26.22015)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS13192022-203823.85e-05-1.56-1.561NEODyS: "Based on 75 optical observations (of which 0 are rejected as outliers) from 2009/05/17.261 to 2009/05/26.221. NOTE: The Virtual Impactor in 2022/05/29.763 ... 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 28 May '09

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

1912Noted that JPL Sentry has updated its 2009 KK risk assessment - see above
Grabbed MPEC 2009-K65 - Comet 126P/IRAS - see above
1801Grabbed MPEC 2009-K64 - 2009 KM7 - see above
1548Grabbed MPEC 2009-K63 - Comet C/2009 K4 (Gibbs) - see above
1519Grabbed MPEC 2009-K62 - Comet C/2009 K3 (Beshore) - see above
1319Noted that JPL Sentry has removed 2009 KD5 as an impact risk - see above
Noted that NEODyS has updated its 2009 KK risk assessment - see above
Grabbed MPEC 2009-K61 - Daily Orbit Update - see above
0200Grabbed MPEC 2009-K60 - 2009 KC7 - see above