Contents  on 6 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 6 July '12

One object reported inside ten LD

There is one object reported flying within ten lunar distances (LD) of Earth today. Radar target 2012 MY2 is outbound from 5.15 to 5.94 LD. No other objects are known to come inside ten LD until November.

This report was generated at 1539 UTC. Observation of intruder 2011 PU1 from last August is reported in today's DOU MPEC.

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 6 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 6 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 6 July '12 >>  MPEC 2012-N07 - "06:01 UT" - Daily Orbit Update

Observers  on 6 July '12

Fifteen observers appear in today's MPEC.

CodeObserver / observatory
I99Blanquita Obs. in Spain, 1 in MPEC 2012-N07 -- 331471
160Castelmartini Obs. in Italy, 3 in MPEC 2012-N07 -- 2012 LE11, 2012 HG31, 317685
703Catalina Sky Survey in Arizona, 1 in MPEC 2012-N07 -- 173561
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPEC 2012-N07 -- 2012 MS4, 2012 LU7, 2012 JR17
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-N07 -- 2012 KM45
I70Edney House Obs., 1 in MPEC 2012-N07 -- 68348
560Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2012-N07 -- 2012 LU7
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-N07 -- 2012 EC
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2012-N07 -- 159504, 152941
B38Santa Mama Obs. in Italy, 4 in MPEC 2012-N07 -- 2012 HG31, 331471, 162980, 5587
033Schwarzschild Obs. in Germany, 4 in MPEC 2012-N07 -- 2011 PX, 2011 PU1, 2011 OV4, 2011 OQ5
645Sloan Digital Sky Survey (SDSS) in New Mexico, 2 in MPEC 2012-N07 -- 55408, 277810
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-N07 -- 2012 LG11
I76Tesla Obs., 1 in MPEC 2012-N07 -- 2012 LU7
G56Walnut Creek Obs. in northern California, 1 in MPEC 2012-N07 -- 153958
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 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.





Notes for Today's Latest Risk Assessments
2011 PU1JPL Sentry15372063-2106161.7e-04-4.13-4.470JPL: "Analysis based on 57 observations spanning 45.352 days (2011-Aug-06.9677 to 2011-Sep-21.319885)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
NEODyS15372081-209041.71e-04-4.16-4.290NEODyS: "Based on 57 optical observations (of which 1 are rejected as outliers) from 2011-08-06.968 to 2011-09-21.321."

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 6 July '12

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

1539Generated Traffic Report
1537Noted that JPL Sentry has updated its 2011 PU1 risk assessment - see above
Noted that NEODyS has updated its 2011 PU1 risk assessment - see above
Grabbed MPEC 2012-N07 - Daily Orbit Update - see above