Contents  on 24 June '13

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 24 June '13

No objects reported inside ten LD

No natural objects are reported to be passing within ten lunar distances (LD) of Earth today, and none are known to be coming inside ten LD until late July.

This report was generated at 1436 UTC.

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 24 June '13

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. So far The Tracking News has counted a total of twelve listings on the NEOCP today.

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 24 June '13

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 24 June '13 >>  MPEC 2013-M37 - "06:06 UT" - Daily Orbit Update

Observers  on 24 June '13

Seven observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPEC 2013-M37 -- 2013 ML3, 2013 LK31
448Desert Moon Obs. in New Mexico, 2 in MPEC 2013-M37 -- 2013 LK31, 2013 LB1
Z81Estrella de Mar Obs., 2 in MPEC 2013-M37 -- 170013, 163249
213Montcabre Obs. in Spain, 1 in MPEC 2013-M37 -- 285263
C95SATINO-1 in France, 1 in MPEC 2013-M37 -- 2013 LN31
C35Terrassa Obs., 1 in MPEC 2013-M37 -- 285263
Z92West Park Obs., 1 in MPEC 2013-M37 -- 285263
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 June '13

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
2013 ML3JPL Sentry1431210943.9e-07-5.36-5.770JPL: "Analysis based on 48 observations spanning 1.8534 days (2013-Jun-19.27039 to 2013-Jun-21.12379)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS14312076-210942.56e-07-5.55-5.850NEODyS: "Based on 51 optical observations (of which 3 are rejected as outliers) from 2013-06-19.271 to 2013-06-21.125."

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 24 June '13

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

1436Generated Traffic Report
1431Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-M37 - Daily Orbit Update - see above