Contents  on 25 July '12

Asteroid/Comet Connection (A/CC) 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.

Traffic Report  on 25 July '12

Two objects reported inside ten LD

Two asteroids are reported passing inside ten lunar distances (LD) of Earth today. 2012 OQ is outbound from 7.71 to 8.40 LD and 2012 OU1 comes its closest to Earth on this passage, reaching 8.48 LD at 2332 UTC. No others are known to come within ten LD until November.

This report was updated at 1918 UTC with the recovery of distant 2007 VD12 (MPEC) and, earlier, follow-up in today's DOU MPEC for 2012 OU1 and 2012 OQ as well as the recoveries of distant 2007 XH16 and departed risk-listed intruder 2012 MF7. Today's first traffic report was generated at 1440 UTC.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Object distances are interpreted by A/CC from JPL Horizons data. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 25 July '12

The MPC's NEO Confirmation Page has 1 listing

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one object listed. So far The Tracking News has counted a total of four listings on the NEOCP today.

New MPECs  on 25 July '12

Minor Planet Electronic Circulars

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

MPEC 2012-O33 - "18:36 UT" - 2007 VD12

<< DOU on 25 July '12 >>  MPEC 2012-O32 - "06:02 UT" - Daily Orbit Update

Observers  on 25 July '12

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2012-O32 -- 2012 NQ, 2012 MA7, 2012 HG31, 2012 FE58
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPEC 2012-O32 -- 2012 OZ, 2012 OU1, 2012 OC1, 2012 HY33, 2012 HJ1, 2012 DX75, 2007 YK, 2007 XH16, 2005 VY17, 54690, 5011, 4197
719Etscorn Obs. in New Mexico, 4 in MPEC 2012-O32 -- 2011 WV134, 329614, 153958, 5587
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-O32 -- 2006 CF
J95Great Shefford Obs. in England, 3 in MPEC 2012-O32 -- 2012 OQ, 2012 OD1, 2012 MM11
A17Guidestar Obs. in Germany, 6 in MPEC 2012-O32 -- 2012 OO, 2012 OA1, 2012 NP, 2006 DQ62, 2005 YN3, 2000 RN77
240Herrenberg Obs. in Germany, 1 in MPEC 2012-O32 -- 1221
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-O32 & 2012-O33 -- 2012 MF7, 2007 VD12
C47Nonndorf Obs. in Austria, 2 in MPEC 2012-O32 -- 2012 OQ, 2012 OO
I61Ourense Obs., 1 in MPEC 2012-O32 -- 4179
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 14 in MPEC 2012-O32 -- 2012 OQ, 2012 OO, 2012 OD1, 2012 OA1, 2012 NP, 2012 LE11, 2012 BZ76, 2012 BC20, 2011 UL21, 2010 OS22, 2009 AV, 2008 YT30, 2003 DE6, 2001 QG142
H36Sandlot Obs. in Kansas, 2 in MPEC 2012-O32 -- 2012 LK11, 2006 DQ62
204Schiaparelli Obs. in Italy, 8 in MPEC 2012-O32 -- 2012 NQ, 2012 NP, 2012 NO, 2012 NN, 2012 MP, 2006 DQ62, 2002 PO6, 1998 ST27
E12Siding Spring Survey in New South Wales, 1 in MPEC 2012-O32 -- 433
J84South Obs. in England, 2 in MPEC 2012-O32 -- 2012 OQ, 2012 NQ
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-O32 -- 2000 RN77
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 July '12

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. Both also post impact solutions beyond 100 years for a few special objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON2 risk pages.





Notes for Today's Latest Risk Assessments
2012 MF7JPL Sentry14342046-2092111.4e-04-4.68-4.740JPL: "Analysis based on 26 observations spanning 29.055 days (2012-Jun-23.37429 to 2012-Jul-22.429464)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
NEODyS14342042-2086161.96e-04-4.53-4.570NEODyS: "Based on 27 optical observations (of which 1 are rejected as outliers) from 2012-06-23.375 to 2012-07-22.430."

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 25 July '12

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

1918Updated Traffic Report
1912Grabbed MPEC 2012-O33 - 2007 VD12 - see above
1434Noted that JPL Sentry has updated its 2012 MF7 risk assessment - see above
Noted that NEODyS has updated its 2012 MF7 risk assessment - see above
Grabbed MPEC 2012-O32 - Daily Orbit Update - see above