Contents  on 1 July '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 1 July '09

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and one updated listings. Of these, two were "one nighters." 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 1 July '09

Minor Planet Electronic Circulars

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

MPEC 2009-N03 - "15:02 UT" - 2009 MC9

<< DOU on 1 July '09 >>  MPEC 2009-N02 - "06:07 UT" - Daily Orbit Update

MPEC 2009-N01 - "01:01 UT" - Comets C/2009 D7, 2009 D8, 2009 E2, 2009 E3, 2009 E4 (SOHO)

Observers  on 1 July '09

Fourteen observing facilities appear in today's MPECs.

CodeObserver / observatory
I77CEAMIG-REA in Brazil, 1 in MPEC 2009-N03 -- 2009 MC9
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-N02 -- 154244, 11500
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2009-N03 -- 2009 MC9
704LINEAR in New Mexico, 1 in MPEC 2009-N02 -- 105140
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2009-N02 -- 2009 MX, 2009 ML1, 2009 MD
A13Naef Obs. in Switzerland, 4 in MPEC 2009-N02 -- 2009 LW2, 2009 KJ22, 16960, 5626
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-N02 -- 2007 LL, 2005 MR5, 2002 LV, 2001 FE90, 2000 OB22
D90*Rolando Ligustri in Italy via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-N03 -- 2009 MC9
C495COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2009-N01 -- C/2009 D7
C505COR2-B instrument (5) aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2009-N01 -- C/2009 D7
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-N02 & 2009-N03 -- 2009 MC9, 67367, 1863
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPEC 2009-N01 -- C/2009 E4, C/2009 E3, C/2009 D8, C/2009 D7
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 3 in MPEC 2009-N01 -- C/2009 E4, C/2009 E2, C/2009 D7
H53Thompsonville Obs. in Illinois, 4 in MPEC 2009-N02 -- 2002 LV, 85989, 212546, 5620
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-N03 -- 2009 MC9
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 July '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 MB9NEODyS13382031-205631.57e-09-5.24-5.350NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2009/06/29.473 to 2009/06/30.658."
2009 LU2NEODyS13382012-2089304.63e-06-3.28-3.410NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2009/06/14.206 to 2009/06/26.263."

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 1 July '09

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

1608Grabbed MPEC 2009-N03 - 2009 MC9 - see above
1338Noted that NEODyS has updated its 2009 LU2 risk assessment - see above
Noted that NEODyS has posted 2009 MB9 as an impact risk - see above
Grabbed MPEC 2009-N02 - Daily Orbit Update - see above
0403Grabbed MPEC 2009-N01 - Comets C/2009 D7, 2009 D8, 2009 E2, 2009 E3, 2009 E4 (SOHO) - see above