Contents  on 3 June '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 3 June '12

Three objects reported inside ten LD

Three visitors are reported traveling within ten lunar distances (LD) of our planet today, all of them outbound. 2012 LA moves from 7.9 to 8.0 LD*, 2012 KC45 from 8.49 to 9.84 LD, and 2012 KT12 from 8.51 to 9.31 LD.

No other objects are known to approach ten LD until November.

This report was generated at 1557 UTC with follow-up in today's DOU MPEC for 2012 LA, 2012 KT42, and 2012 KZ41.

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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 3 June '12

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, three were "one nighters."

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 3 June '12

Minor Planet Electronic Circulars

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

<< DOU on 3 June '12 >>  MPEC 2012-L09 - "06:03 UT" - Daily Orbit Update

Observers  on 3 June '12

Five observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPEC 2012-L09 -- 2012 LA, 2012 KZ41, 2012 KX, 2012 KU42, 2012 KN18, 2012 KK11, 2012 KF47, 2012 KC6, 2012 JR17, 2012 JB16, 2011 YU62, 2006 VY13, 2001 WN1, 142781, 138937
704LINEAR in New Mexico, 1 in MPEC 2012-L09 -- 8035
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-L09 -- 2012 KC6
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-L09 -- 2012 KC6
204Schiaparelli Obs. in Italy, 6 in MPEC 2012-L09 -- 2012 KZ41, 2012 KU42, 2012 KT42, 2012 KO18, 2009 KJ22, 162173
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 June '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 KU42JPL Sentry15522035-207832.0e-08-3.40-3.410JPL: "Analysis based on 51 observations spanning 7.8850 days (2012-May-25.44054 to 2012-Jun-02.32556)." Diameter approximately 1.400 km. from mean, weighted H=16.9.
NEODyS15522035-207821.7e-08-3.58-3.580NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2012-05-25.441 to 2012-06-02.326."

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 3 June '12

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

1557Generated Traffic Report
1552Noted that JPL Sentry has updated its 2012 KU42 risk assessment - see above
Noted that NEODyS has updated its 2012 KU42 risk assessment - see above
Grabbed MPEC 2012-L09 - Daily Orbit Update - see above