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Contents  on 23 June '09

Resources:

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.

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Radar Astrometry  on 23 June '09

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 0527 UTC when the database was dated 22 June

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NEOCP Activity  on 23 June '09

The MPC's NEO Confirmation Page has 4 listings: 1 new, 3 updated

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

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New MPECs  on 23 June '09

Minor Planet Electronic Circulars

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


MPEC 2009-M30 - "18:01 UT" - 2009 MH1


MPEC 2009-M29 - "17:57 UT" - 2009 MG1


MPEC 2009-M28 - "16:19 UT" - Observations of Comets


MPEC 2009-M27 - "16:02 UT" - Comet P/2009 L2 (Yang-Gao)


MPEC 2009-M26 - "15:47 UT" - Comet C/2009 K5 (McNaught)


MPEC 2009-M25 - "15:42 UT" - Comet C/2009 K4 (Gibbs)


MPEC 2009-M24 - "15:34 UT" - Comet C/2009 K2 (Catalina)


MPEC 2009-M23 - "14:41 UT" - 2008 QD4


<< DOU on 23 June '09 >>  MPEC 2009-M22 - "06:06 UT" - Daily Orbit Update

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Observers  on 23 June '09

A total of 61 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2009-M27 -- P/2009 L2
J24Altamira Obs. in Spain, 18 in MPECs 2009-M24, 2009-M25, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 K4, C/2009 K2, C/2009 F2, C/2009 E1, C/2008 Q3, C/2008 Q1, C/2008 P1, C/2008 N1, C/2008 A1, C/2006 W3, 217P, 143P, 116P, 88P, 67P, 65P, 22P
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2009-M27 -- P/2009 L2
H55Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2009-M22 -- 2009 MA, 2009 LW2, 2009 KJ22, 2002 AD2
J51Atlante Obs. in the Canary Islands, 8 in MPECs 2009-M22, 2009-M27 & 2009-M28 -- P/2009 L2, C/2008 Q3, C/2008 P1, C/2008 N1, C/2006 W3, 2001 FE90, 154244, 22P
467Auckland Obs. in New Zealand, 1 in MPEC 2009-M26 -- C/2009 K5
B96Brixiis Obs. in Belgium, 2 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2006 W3
235CAST Obs. in Italy, 9 in MPECs 2009-M25, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 K4, C/2009 E1, C/2008 FK75, C/2006 W3, C/2006 Q1, C/2005 L3, 88P, 65P
B66Casasco Obs. in Italy, 1 in MPEC 2009-M28 -- C/2006 W3
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2009-M22 & 2009-M28 -- C/2008 FK75, C/2007 M1, 152637, 5332
B11Cima Rest Obs. in Italy, 4 in MPEC 2009-M28 -- C/2007 M1, C/2006 W3, C/2006 Q1, C/2005 S4
850Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2009-M24 & 2009-M27 -- P/2009 L2, C/2009 K2
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2009-M28 -- 217P
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2009-M28 -- 127P
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 136617
651Grasslands Obs. in Arizona, 1 in MPEC 2009-M29 -- 2009 MG1
J95Great Shefford Obs. in England, 1 in MPEC 2009-M22 -- 2009 MU
E16Grove Creek Obs. in New South Wales, 3 in MPEC 2009-M28 -- C/2008 N1, C/2006 W3, C/2006 Q1
A21Irmtraut Obs. in Germany, 1 in MPEC 2009-M27 -- P/2009 L2
987Isle of Man Obs. on the Isle of Man, 3 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2006 W3, 22P
J28Jaen Obs. in Spain, 1 in MPEC 2009-M27 -- P/2009 L2
D32JiangNanTianChi Obs. in China, 1 in MPEC 2009-M27 -- P/2009 L2
704LINEAR in New Mexico, 7 in MPECs 2009-M22 & 2009-M27 -- 2009 MW, P/2009 L2, 2009 KJ22, 212546, 16960, 9162, 1943
J75La Sagra Obs. in Spain, 1 in MPEC 2009-M23 -- 2008 QD4
B33Libbiano Obs. in Italy, 1 in MPEC 2009-M27 -- P/2009 L2
J59Linceo Obs. in Spain, 1 in MPEC 2009-M27 -- P/2009 L2
B82Maidbronn Obs. in Germany, 1 in MPEC 2009-M28 -- C/2005 S4
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2009-M22 -- 2004 RH340, 2001 XV266
J45Montana Cabreja Obs. in the Canary Islands, 6 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2008 Q3, C/2006 W3, 116P, 88P, 65P
213Montcabre Obs. in Spain, 3 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2008 Q3, C/2006 W3
945Monte Deva Obs. in Spain, 9 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2008 Q3, C/2006 W3, C/2006 Q1, C/2005 L3, 217P, 116P, 65P, 22P
900Moriyama Obs. in Japan, 5 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 E1, C/2008 N1, C/2006 Q1, 22P
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-M22, 2009-M29 & 2009-M30 -- 2009 MH1, 2009 MG1, 2009 KJ22, 2002 HF8, 1998 HN3, 24761, 16960
J47Nazaret Obs. in Spain, 9 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2008 Q3, C/2008 FK75, C/2006 W3, C/2005 L3, 116P, 67P, 65P, 22P
583Odessa-Mayaki Obs., 3 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2006 W3, 22P
D92Osaki Obs. in Japan, 1 in MPEC 2009-M28 -- C/2008 Q3
A32Panker Obs. in Germany, 5 in MPEC 2009-M28 -- C/2008 Q1, C/2008 FK75, C/2006 Q1, C/2005 L3, 65P
B49Paus Obs. in Spain, 1 in MPEC 2009-M27 -- P/2009 L2
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPECs 2009-M22, 2009-M24, 2009-M27 & 2009-M28 -- 2009 MU, P/2009 L2, C/2009 K2, C/2009 F5, C/2008 Q1, C/2008 FK75, C/2006 Q1, C/2005 S4, C/2005 L3, 2001 FE90, 143P, 116P, 88P, 65P
561Piszkesteto Sta. in Hungary, 6 in MPECs 2009-M24 & 2009-M28 -- C/2009 K2, C/2009 F5, C/2009 E1, C/2008 Q1, C/2008 N1, C/2008 A1
J53Posadas Obs. in Spain, 8 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2008 Q1, C/2008 N1, C/2008 FK75, C/2008 A1, C/2006 W3, C/2005 L3, 88P
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-M27 -- P/2009 L2
D90RAS Obs. Moorook in South Australia, 4 in MPECs 2009-M26, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 K5, C/2008 Q3, C/2007 B2
B56Sant Pere Obs. in Spain, 1 in MPEC 2009-M28 -- C/2006 W3
B74Santa Maria de Montmagastrell Obs. in Spain, 5 in MPECs 2009-M25 & 2009-M28 -- C/2009 K4, C/2008 Q3, C/2008 N1, C/2006 W3, C/2005 L3
204Schiaparelli Obs. in Italy, 4 in MPECs 2009-M25 & 2009-M28 -- C/2009 K4, C/2009 E1, C/2008 N1, C/2006 W3
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-M22 & 2009-M26 -- C/2009 K5, 52768, 4957
B40Skylive Obs. in Italy, 7 in MPECs 2009-M22, 2009-M27 & 2009-M28 -- 2009 MA, P/2009 L2, C/2009 E1, C/2008 N1, C/2006 W3, C/2005 L3, 217P
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-M22 -- 24761, 216115
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-M22 -- 2009 MD, 2009 LW2, 2009 LS, 2009 KO4, 2004 LC2
A71Stixendorf Obs. in Austria, 4 in MPECs 2009-M25, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 K4, 88P, 65P
I19Tanti Obs. in Argentina, 2 in MPECs 2009-M26 & 2009-M28 -- C/2009 K5, C/2009 F2
H53Thompsonville Obs. in Illinois, 2 in MPEC 2009-M28 -- C/2008 Q3, C/2005 L3
H10Tzec Maun Obs. Mayhill in New Mexico, 7 in MPECs 2009-M22, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 E1, C/2008 Q3, C/2008 FK75, C/2007 M1, C/2005 L3, 65733
D25Tzec Maun Obs. Pingelly in Western Australia, 5 in MPECs 2009-M26, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 K5, C/2007 B2, 217P, 22P
H78Univ. of Narino Obs. in Colombia, 1 in MPEC 2009-M22 -- 143651
A92Urseanu Obs. in Romania, 2 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2006 W3
H47Vicksburg Obs. in Mississippi, 3 in MPECs 2009-M27 & 2009-M28 -- P/2009 L2, C/2006 W3, C/2006 Q1
B42Vitebsk Obs. in Belarus, 3 in MPECs 2009-M24, 2009-M27 & 2009-M28 -- P/2009 L2, C/2009 K2, C/2006 Q1
367Yatsuka Obs. in Japan, 1 in MPEC 2009-M28 -- C/2006 Q1
J08Zonalunar Obs. in Spain, 3 in MPEC 2009-M28 -- C/2008 Q3, 65P, 22P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 23 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.
0000NNN000

Object
Risk
Monitor		When
Noted
UTC		0000T0000
Year
Range
VI
#		000NN00
Prob
Cum		T0000
PS
Cum		T0000
PS
Max
T
S

Notes for Today's Latest Risk Assessments
2009 MG1JPL Sentry20002057-2107151.7e-07-6.17-6.850JPL: "Analysis based on 13 observations spanning 1.9956 days (2009-Jun-21.27223 to 2009-Jun-23.26784)." Diameter approximately 0.060 km. from mean, weighted H=23.8.
2009 MUJPL Sentry13272096-209924.0e-07-6.44-6.440JPL: "Analysis based on 82 observations spanning 3.9055 days (2009-Jun-19.30659 to 2009-Jun-23.21214)." Diameter approximately 0.040 km. from mean, weighted H=24.6.
2009 MSJPL Sentry20002010-2107791.0e-07-1.47-1.890JPL: "Analysis based on 17 observations spanning 3.1329 days (2009-Jun-19.22249 to 2009-Jun-22.35544)." Diameter approximately 2.137 km. from mean, weighted H=16.0.
NEODyS13272010-2089897.74e-08-1.56-2.000NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/06/19.223 to 2009/06/22.356."

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.

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Chronology  on 23 June '09

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

2000Noted that JPL Sentry has posted 2009 MG1 as an impact risk - see above
Noted that JPL Sentry has posted 2009 MS as an impact risk - see above
1812Grabbed MPEC 2009-M29 - 2009 MG1 - see above
Grabbed MPEC 2009-M30 - 2009 MH1 - see above
1638Grabbed MPEC 2009-M27 - Comet P/2009 L2 (Yang-Gao) - see above
Grabbed MPEC 2009-M28 - Observations of Comets - see above
1609Grabbed MPEC 2009-M25 - Comet C/2009 K4 (Gibbs) - see above
Grabbed MPEC 2009-M26 - Comet C/2009 K5 (McNaught) - see above
1540Grabbed MPEC 2009-M24 - Comet C/2009 K2 (Catalina) - see above
1511Grabbed MPEC 2009-M23 - 2008 QD4 - see above
1327Noted that NEODyS has posted 2009 MS as an impact risk - see above
Noted that JPL Sentry has updated its 2009 MU risk assessment - see above
Grabbed MPEC 2009-M22 - Daily Orbit Update - see above
0527Noted Radar Astrometry database update - see above