Contents  on 29 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 29 June '13

No objects reported inside ten LD

No natural objects are known to be traveling inside ten lunar distances (LD) of Earth today, and none are known to be this close until late July.

This report was generated at 1224 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 29 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, two 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 29 June '13

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-M49 - "13:59 UT" - 2001 RU17

<< DOU on 29 June '13 >>  MPEC 2013-M48 - "06:02 UT" - Daily Orbit Update

MPEC 2013-M47 - "01:24 UT" - 2011 EG17

Observers  on 29 June '13

Eleven observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPEC 2013-M48 -- 2013 ML3, 2013 LK31, 2013 LK25, 2013 LH16, 2013 LG16, 2013 LB1, 2013 KH6, 2013 GZ79, 2013 GY68, 2010 LG14, 2009 BL2, 363790, 354952, 285263, 271480, 26166, 24445, 17188, 137170
G58Chabot Obs. in northern California, 3 in MPEC 2013-M48 -- 2013 MY6, 2013 MR6, 2013 ML3
Z81Estrella de Mar Obs., 2 in MPEC 2013-M48 -- 2013 ML3, 2013 LK31
C73Galati Obs. in Romania, 3 in MPEC 2013-M48 -- 2013 ML3, 2013 LN31, 2013 LK31
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2013-M47 & 2013-M49 -- 2011 EG17, 2001 RU17
C91Montevenere Obs., 1 in MPEC 2013-M48 -- 354952
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-M48 -- 170013
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPEC 2013-M48 -- 2010 NY65, 2009 WR6, 247156, 159609, 8567
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-M48 -- 163249
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2013-M48 -- 2013 MY6, 2013 MQ, 2013 LK7, 2013 KZ1, 2013 GG69, 2013 GC34, 2004 BG121, 136874
H06Lprogram code "L" via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-M48 -- 2013 LN31
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 ML3NEODyS14462109-210944.3e-06-4.33-4.440NEODyS: "Based on 87 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-06-28.257."
JPL Sentry1222210941.1e-06-4.91-5.260JPL: "Analysis based on 85 observations spanning 8.9856 days (2013-Jun-19.27039 to 2013-Jun-28.25603)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
2013 LG16JPL Sentry1222R E M O V E DJPL: Risk listing removed at 0950 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 29 June '13

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

1446Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
1445Grabbed MPEC 2013-M49 - 2001 RU17 - see above
1224Generated Traffic Report
1222Noted that JPL Sentry has removed 2013 LG16 as an impact risk - see above
Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-M48 - Daily Orbit Update - see above
0124Grabbed MPEC 2013-M47 - 2011 EG17 - see above