Contents  on 7 May '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 7 May '12

No objects reported inside ten LD

No asteroids are reported traveling within ten lunar distances (LD) of our planet today. Next up, 2010 KK37 arrives inside ten LD on May 15th.

This report was generated at 1558 UTC with follow-up in today's DOU MPEC for 2012 HD25.

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 7 May '12

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2322 UTC). It was last noted active on May 4th.

New MPECs  on 7 May '12

Minor Planet Electronic Circulars

As of last check at 2322 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 7 May '12 >>  MPEC 2012-J20 - "06:04 UT" - Daily Orbit Update

Observers  on 7 May '12

Three observers appear in today's MPEC.

CodeObserver / observatory
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-J20 -- 35670
A24New Millennium Obs. in Italy, 7 in MPEC 2012-J20 -- 2012 FY23, 2011 WV134, 2010 KX7, 66272, 53110, 322966, 186823
204Schiaparelli Obs. in Italy, 13 in MPEC 2012-J20 -- 2012 HN2, 2012 HM8, 2012 HG8, 2012 HG31, 2012 HD25, 2012 GX11, 2011 WV134, 2009 HU58, 2004 VB, 2003 WH166, 2002 JC9, 2000 JB6, 163000
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 May '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2322 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 HP13NEODyS15552077-209061.18e-07-6.69-7.20NEODyS: "Based on 195 optical observations (of which 17 are rejected as outliers) from 2012-04-22.461 to 2012-04-27.837."
2012 HG2NEODyS15552053-20902621.3e-03-4.08-4.880NEODyS: "Based on 152 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-04.279."
2009 VZ39JPL Sentry05122012-21107927.0e-06-6.11-6.900JPL: "Analysis based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546)." Diameter approximately 0.009 km. from mean, weighted H=27.9.

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 7 May '12

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

1558Generated Traffic Report
1555Noted that NEODyS has updated its 2012 HG2 risk assessment - see above
Noted that NEODyS has reposted 2012 HP13 as an impact risk - see above
Grabbed MPEC 2012-J20 - Daily Orbit Update - see above
0512Noted that JPL Sentry has updated its 2009 VZ39 risk assessment - see above