Contents  on 30 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 30 June '09

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of four 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 30 June '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-M56 - "17:12 UT" - 2009 MB9

MPEC 2009-M55 - "16:55 UT" - Comets C/2009 D4, 2009 D5, 2009 D6 (SOHO)

MPEC 2009-M54 - "16:45 UT" - Comets C/2009 C4, 2009 C5, 2009 D2, 2009 D3 (SOHO)

<< DOU on 30 June '09 >>  MPEC 2009-M53 - "06:07 UT" - Daily Orbit Update

Observers  on 30 June '09

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

CodeObserver / observatory
A81Balzaretto Obs. in Italy, 3 in MPEC 2009-M53 -- 2009 MA, 2002 LV, 2001 FE90
G58Chabot Obs. in northern California, 1 in MPEC 2009-M53 -- 2009 MZ6
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-M53 -- 2009 MX6
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-M53 -- 2009 MA
734Farpoint Obs. in Kansas, 1 in MPEC 2009-M53 -- 2009 MN8
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-M53 -- 2001 FE90
J95Great Shefford Obs. in England, 3 in MPEC 2009-M53 -- 2009 MZ6, 2009 MA, 2001 FE90
682Kanab Obs. in Utah, 1 in MPEC 2009-M53 -- 2009 MN8
J75La Sagra Obs. in Spain, 1 in MPEC 2009-M53 -- 194386
B67Mirasteilas Obs. in Switzerland, 3 in MPEC 2009-M53 -- 2001 FE90, 215442, 214088
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2009-M53 -- 2009 KL2
A13Naef Obs. in Switzerland, 2 in MPEC 2009-M53 -- 54401, 15745
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2009-M53 -- 2009 MA, 2002 LV, 2001 FE90
D90*Rolando Ligustri in Italy via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-M56 -- 2009 MB9
C495COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2009-M55 -- C/2009 D4
C505COR2-B instrument (5) aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2009-M55 -- C/2009 D4
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-M53 & 2009-M56 -- 2009 MN8, 2009 MB9
B40Skylive Obs. in Italy, 1 in MPEC 2009-M53 -- 2002 LV
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPEC 2009-M55 -- C/2009 D6, C/2009 D4
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 6 in MPECs 2009-M54 & 2009-M55 -- C/2009 D5, C/2009 D4, C/2009 D3, C/2009 D2, C/2009 C5, C/2009 C4
A16Tentlingen Obs. in Switzerland, 1 in MPEC 2009-M53 -- 3103
198Wildberg Obs. in Germany, 3 in MPEC 2009-M53 -- 2009 KC7, 2009 CC3, 2000 OB22
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 June '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 MB9JPL Sentry18562056-210585.8e-09-5.33-5.890JPL: "Analysis based on 10 observations spanning 1.1849 days (2009-Jun-29.47208 to 2009-Jun-30.65694)." Diameter approximately 0.658 km. from mean, weighted H=18.6.
2009 MN8JPL Sentry1344R E M O V E DJPL: Risk listing removed at 0849 UTC.
2009 LU2JPL Sentry20092012-2108304.8e-06-3.31-3.470JPL: "Analysis based on 14 observations spanning 12.058 days (2009-Jun-14.20491 to 2009-Jun-26.262609)." Diameter approximately 0.110 km. from mean, weighted H=22.5.

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 30 June '09

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

2009Noted that JPL Sentry has updated its 2009 LU2 risk assessment - see above
1856Noted that JPL Sentry has posted 2009 MB9 as an impact risk - see above
1739Grabbed MPEC 2009-M56 - 2009 MB9 - see above
1710Grabbed MPEC 2009-M54 - Comets C/2009 C4, 2009 C5, 2009 D2, 2009 D3 (SOHO) - see above
Grabbed MPEC 2009-M55 - Comets C/2009 D4, 2009 D5, 2009 D6 (SOHO) - see above
1344Noted that JPL Sentry has removed 2009 MN8 as an impact risk - see above
1343Grabbed MPEC 2009-M53 - Daily Orbit Update - see above