Contents  on 8 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 8 May '12

No objects reported inside ten LD

There are no objects reported passing inside ten lunar distances (LD) of our planet today. Coming toward Earth next, 2010 KK37 arrives inside ten LD on May 15th.

This report was generated at 1712 UTC with today's DOU MPEC reporting observation of 2012 GP1 from mid-April.

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.

Radar Astrometry  on 8 May '12

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 0106 UTC when the database was dated 7 May

NEOCP Activity  on 8 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 on May 4th.

New MPECs  on 8 May '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-J22 - "20:15 UT" - 2012 DK61

<< DOU on 8 May '12 >>  MPEC 2012-J21 - "06:02 UT" - Daily Orbit Update

Observers  on 8 May '12

Eleven observers appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2012 HM8
703Catalina Sky Survey in Arizona, 1 in MPEC 2012-J21 -- 159677
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 4 in MPEC 2012-J21 -- 2012 HN13, 2012 HB25, 2012 DK61, 2012 AA11
C01Lohrmann Obs. in Germany, 2 in MPEC 2012-J21 -- 86667, 141018
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-J21 -- 2012 EC
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-J22 -- 2012 DK61
A24New Millennium Obs. in Italy, 16 in MPEC 2012-J21 -- 2012 HL, 2002 JC9, 85839, 322775, 318050, 317643, 24475, 154555, 143651, 141018, 7889, 6455, 5587, 4055, 3352, 3103
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-J21 -- 2012 GP1, 2012 EH5, 2011 GB55
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-J21 -- 2012 HC20
645Sloan Digital Sky Survey (SDSS) in New Mexico, 12 in MPEC 2012-J21 -- 285638, 219021, 144861, 141079, 138859, 138325, 138205, 137099, 137078, 136874, 106538, 10145
2905Richard P. Boyle via Vatican Advanced Technology Telescope in Arizona, 1 in MPEC 2012-J21 -- 2004 VB
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 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 HB25JPL Sentry17112023-206225.7e-07-6.25-6.260JPL: "Analysis based on 28 observations spanning 12.842 days (2012-Apr-24.35308 to 2012-May-07.19507)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
NEODyS17112054-206229.47e-07-6.03-6.040NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2012-04-24.354 to 2012-05-07.196."
2012 ECJPL Sentry1711R E M O V E DJPL: Risk listing removed at 0951 UTC.

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 8 May '12

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

2018Grabbed MPEC 2012-J22 - 2012 DK61 - see above
1712Generated Traffic Report
1711Noted that JPL Sentry has removed 2012 EC as an impact risk - see above
Noted that JPL Sentry has updated its 2012 HB25 risk assessment - see above
Noted that NEODyS has updated its 2012 HB25 risk assessment - see above
Grabbed MPEC 2012-J21 - Daily Orbit Update - see above
0106Noted Radar Astrometry database update - see above