Contents  on 2 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 2 July '12

One object reported inside ten LD

There is one object reported to be inside ten lunar distances (LD) of Earth today. Within Earth's Hill sphere, radar target 2012 MY2 is outbound from 2.16 to 2.85 LD. No other objects are known to come to within ten LD of our planet until November.

This report was updated at 2225 UTC with follow-up in radar for 2012 MY2. Today's first traffic report was generated at 1505 UTC.


Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 2 July '12

Radar observation of two objects

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


Data update noted at 2112 UTC when the database was dated 2 July


Data update noted at 2359 UTC when the database was dated 2 July

NEOCP Activity  on 2 July '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 June 30th.

New MPECs  on 2 July '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 2 July '12 >>  MPEC 2012-N03 - "06:02 UT" - Daily Orbit Update

Observers  on 2 July '12

Six observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 308242
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2012-N03 -- 2012 MP, 2012 MN2, 2012 MM11, 2012 ML6, 2012 LW7, 2012 KL18
252Goldstone DSS-13 34m antenna in southern California, 1 in radar -- 2012 MY2
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2012 MY2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-N03 -- 2012 LK9
I93St. Pardon de Conques Obs. in France, 2 in MPEC 2012-N03 -- 2012 MM11, 2012 MC7
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2012 MY2JPL Sentry2209R E M O V E DJPL: Risk listing removed at 2152 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 2 July '12

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

2359Noted Radar Astrometry database update - see above
2225Updated Traffic Report
2209Noted that JPL Sentry has removed 2012 MY2 as an impact risk - see above
2112Noted Radar Astrometry database update - see above
1502Grabbed MPEC 2012-N03 - Daily Orbit Update - see above