Contents  on 27 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 27 June '13

No objects reported inside ten LD

There are no objects reported flying within ten lunar distances (LD) of our planet today, and none are known to be coming into our reporting "bubble" until late July.

This report was generated at 1349 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 27 June '13

The MPC's NEO Confirmation Page has 11 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, seven were "one nighters."

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 27 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-M44 - "17:49 UT" - 2011 OR15

<< DOU on 27 June '13 >>  MPEC 2013-M43 - "06:02 UT" - Daily Orbit Update

Observers  on 27 June '13

Eight observers appear in today's MPECs.

CodeObserver / observatory
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 17 in MPEC 2013-M43 -- 2013 MW6, 2013 LM31, 2013 LK7, 2013 LK25, 2013 LH29, 2013 LH16, 2013 LF1, 2013 LC2, 2013 KR1, 2013 AU76, 2012 WB25, 2012 TQ78, 2012 AE1, 2005 HN3, 2005 EJ94, 2003 RM, 361071
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2013-M43 -- 2013 LN31
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-M44 -- 2011 OR15
G96Mt. Lemmon Survey (MLS) in Arizona, 20 in MPEC 2013-M43 -- 2013 MX5, 2013 MR6, 2013 ML3, 2013 LZ28, 2013 LW28, 2013 LN31, 2013 LM31, 2013 LL31, 2013 LK7, 2013 LK31, 2013 LH16, 2013 LF16, 2013 LC2, 2013 LB2, 2013 KN6, 2013 KH6, 2013 KF6, 2008 OC6, 2006 UD63, 1972 RB
C23Olmen Obs. in Belgium, 1 in MPEC 2013-M43 -- 285263
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2013-M43 -- 2008 KZ5, 89959, 189973
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2013-M43 -- 2013 LN31
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-M43 -- 2013 GF69
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 27 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 ML3NEODyS15262109-210942.8e-06-4.50-4.680NEODyS: "Based on 67 optical observations (of which 4 are rejected as outliers) from 2013-06-19.271 to 2013-06-26.354."
JPL Sentry1346210941.8e-06-4.70-5.110JPL: "Analysis based on 64 observations spanning 7.0833 days (2013-Jun-19.27039 to 2013-Jun-26.35365)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
2013 LZ28NEODyS1526R E M O V E D-
2013 GM3JPL Sentry01442028-21131791.5e-04-4.62-5.480JPL: "Analysis based on 60 observations spanning 9.9806 days (2013-Apr-03.32112 to 2013-Apr-13.30177)." Diameter approximately 0.019 km. from mean, weighted H=26.2.

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 27 June '13

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

1806Grabbed MPEC 2013-M44 - 2011 OR15 - see above
1526Noted that NEODyS has removed 2013 LZ28 as an impact risk - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
1349Generated Traffic Report
1346Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-M43 - Daily Orbit Update - see above
0144Noted that JPL Sentry has updated its 2013 GM3 risk assessment - see above