Contents  on 2 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 2 July '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 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 2 July '09

Minor Planet Electronic Circulars

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

MPEC 2009-N07 - "16:04 UT" - 2009 ME9

MPEC 2009-N06 - "11:33 UT" - 2009 NA

<< DOU on 2 July '09 >>  MPEC 2009-N05 - "06:07 UT" - Daily Orbit Update

MPEC 2009-N04 - "00:35 UT" - 2005 NJ63

Observers  on 2 July '09

Ten observing facilities appear in today's MPECs.

CodeObserver / observatory
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-N06 -- 2009 NA
J95Great Shefford Obs. in England, 1 in MPEC 2009-N04 -- 2005 NJ63
168Kourovskaya Obs. in Russia, 6 in MPEC 2009-N05 -- 153591, 145656, 143678, 3103, 2212, 1866
J75La Sagra Obs. in Spain, 2 in MPECs 2009-N05 & 2009-N06 -- 2009 NA, 2009 KD5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-N07 -- 2009 ME9
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-N07 -- 2009 ME9
A13Naef Obs. in Switzerland, 2 in MPEC 2009-N05 -- 2005 MC, 154244
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2009-N05 -- 2002 LV
E12Siding Spring Survey (SSS) in New South Wales, 9 in MPEC 2009-N05 -- 2009 MN8, 2009 MM1, 2009 MB9, 2009 CZ, 2009 BJ81, 2008 ER7, 2006 MD12, 52387, 20826
587Sormano Obs. in Italy, 1 in MPEC 2009-N05 -- 2009 LS
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 July '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 NAJPL Sentry14002012-2099421.2e-08-4.32-4.720JPL: "Analysis based on 19 observations spanning 1.2888 days (2009-Jul-01.09164 to 2009-Jul-02.38041)." Diameter approximately 0.707 km. from mean, weighted H=18.4.
2009 MB9NEODyS14012030-2086133.46e-08-3.97-4.120NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2009/06/29.473 to 2009/07/01.441."
JPL Sentry14002030-210571.2e-07-3.91-4.250JPL: "Analysis based on 11 observations spanning 1.9681 days (2009-Jun-29.47208 to 2009-Jul-01.44019)." Diameter approximately 0.668 km. from mean, weighted H=18.5.
2009 LU2JPL Sentry2121R E M O V E DJPL: Risk listing removed at 2052 UTC.
2008 ER7JPL Sentry1400R E M O V E DJPL: Risk listing removed at 0856 UTC.
NEODyS1400R E M O V E D-

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 July '09

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

2121Noted that JPL Sentry has removed 2009 LU2 as an impact risk - see above
1636Grabbed MPEC 2009-N07 - 2009 ME9 - see above
1401Noted that NEODyS has updated its 2009 MB9 risk assessment - see above
1400Noted that JPL Sentry has removed 2008 ER7 as an impact risk - see above
Noted that NEODyS has removed 2008 ER7 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 MB9 risk assessment - see above
Noted that JPL Sentry has posted 2009 NA as an impact risk - see above
Grabbed MPEC 2009-N05 - Daily Orbit Update - see above
Grabbed MPEC 2009-N06 - 2009 NA - see above
0040Grabbed MPEC 2009-N04 - 2005 NJ63 - see above