Contents  on 5 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 5 May '12

Two objects reported inside ten LD

Two asteroids are reported traveling inside ten lunar distances (LD) of our planet today. 2012 HA34 is outbound from 7.35 to 9.85 LD and radar target 2012 HM exits ten LD, moving from 9.55 to 10.98 LD. Next up, 2010 KK37 arrives inside ten LD on May 15th.

This report was generated at 1609 UTC with follow-up in today's DOU MPEC for 2012 HG2.

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 5 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 2359 UTC). It was last noted active yesterday.

New MPECs  on 5 May '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 5 May '12 >>  MPEC 2012-J17 - "06:04 UT" - Daily Orbit Update

Observers  on 5 May '12

Eight observers appear in today's MPEC.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2012-J17 -- 2008 CC119, 1998 HJ3
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 10 in MPEC 2012-J17 -- 2012 JA, 2012 HR2, 2012 HN13, 2012 HH31, 2012 HG31, 2012 HG2, 2012 HD20, 2012 HC34, 2012 HB2, 2012 FL35
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-J17 -- 317643
704LINEAR in New Mexico, 1 in MPEC 2012-J17 -- 7889
844Los Molinos Obs. in Uruguay, 1 in MPEC 2012-J17 -- 2004 RQ252
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2012-J17 -- 2012 FN62, 2012 FD1, 2012 EZ11
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-J17 -- 2012 FN62
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-J17 -- 2010 LJ14, 2006 VY13
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 May '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 HG2JPL Sentry16052053-2072941.3e-03-4.10-4.510JPL: "Analysis based on 152 observations spanning 13.906 days (2012-Apr-20.37147 to 2012-May-04.27795)." Diameter approximately 0.014 km. from mean, weighted H=27.0.
NEODyS16052053-20912471.12e-03-4.16-4.890NEODyS: "Based on 149 optical observations (of which 9 are rejected as outliers) from 2012-04-20.372 to 2012-05-04.279."

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 5 May '12

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

1609Generated Traffic Report
1605Noted that JPL Sentry has updated its 2012 HG2 risk assessment - see above
Noted that NEODyS has updated its 2012 HG2 risk assessment - see above
Grabbed MPEC 2012-J17 - Daily Orbit Update - see above