Contents  on 28 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 28 June '13

No objects reported inside ten LD

No asteroids are reported to be within ten lunar distances (LD) of our home world today, and none are known to be coming in until late July.

This report was generated at 1421 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 28 June '13

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of fourteen 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 28 June '13

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 2013-M46 - "23:18 UT" - 2010 NY65

<< DOU on 28 June '13 >>  MPEC 2013-M45 - "06:01 UT" - Daily Orbit Update

Observers  on 28 June '13

Ten observers appear in today's MPECs.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2013-M45 -- 2013 EU9, 2006 HB, 21088
448Desert Moon Obs. in New Mexico, 1 in MPEC 2013-M45 -- 2006 HB
K91LCOGT Sutherland A in South Africa, 1 in MPEC 2013-M46 -- 2010 NY65
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-M45 -- 1993 FS
F51Pan-STARRS 1 (PS1) in Hawaii, 4 in MPECs 2013-M45 & 2013-M46 -- 2010 TV149, 2010 NY65, 2005 ES70, 5381
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-M45 -- 2013 LM31
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2013-M45 -- 189630
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2013-M45 & 2013-M46 -- 2013 MY6, 2013 ML3, 2013 MD6, 2013 LZ28, 2013 LL31, 2013 LK7, 2013 LF16, 2013 KF6, 2013 HG20, 2010 NY65, 2007 CN26
718Wiggins Obs. in Utah, 1 in MPEC 2013-M45 -- 2013 LN31
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-M45 -- 2013 LH25
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 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 ML3NEODyS13512076-210957.89e-06-4.06-4.140NEODyS: "Based on 70 optical observations (of which 4 are rejected as outliers) from 2013-06-19.271 to 2013-06-27.407."
2013 LZ28NEODyS14202101-210113.56e-09-7.35-7.350NEODyS: "Based on 66 optical observations (of which 3 are rejected as outliers) from 2013-06-13.254 to 2013-06-27.314."

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 28 June '13

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

2359Grabbed MPEC 2013-M46 - 2010 NY65 - see above
1421Generated Traffic Report
1420Noted that NEODyS has updated its 2013 LZ28 risk assessment - see above
1351Noted that NEODyS has reposted 2013 LZ28 as an impact risk - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-M45 - Daily Orbit Update - see above