Contents  on 30 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 30 June '13

No objects reported inside ten LD

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

This report was generated at 1424 UTC with today's DOU MPEC reporting observations from March of 2013 ES11 and of distant 2003 FY6 and 68216 2001 CV26.

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 30 June '13

The MPC's NEO Confirmation Page has 13 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 20 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 30 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.

<< DOU on 30 June '13 >>  MPEC 2013-M51 - "06:02 UT" - Daily Orbit Update

MPEC 2013-M50 - "01:29 UT" - 2013 MH7

Observers  on 30 June '13

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 11 in MPECs 2013-M50 & 2013-M51 -- 2013 MY6, 2013 MX5, 2013 MR6, 2013 MQ, 2013 ML3, 2013 MH7, 2013 LK31, 2013 LB2, 2013 LB1, 2013 GY68, 2013 EW128
C77Bernezzo Obs. in Italy, 1 in MPEC 2013-M51 -- 2013 ML3
300Bisei Spaceguard Center in Japan, 13 in MPEC 2013-M51 -- 2013 FC8, 2013 ES11, 2013 EO126, 2013 EA, 2008 SE85, 2003 FY6, 99942, 68216, 362310, 214869, 3752, 1627, 1036
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-M50 -- 2013 MH7
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-M51 -- 2013 MW6
J19El Maestrat Obs. in Spain, 1 in MPEC 2013-M51 -- 105140
Z81Estrella de Mar Obs., 2 in MPEC 2013-M51 -- 2013 ML3, 2006 NL
585Kiev Comet Station in the Ukraine, 1 in MPEC 2013-M51 -- 163249
K93LCOGT Sutherland C in South Africa, 1 in MPEC 2013-M50 -- 2013 MH7
C91Montevenere Obs., 2 in MPEC 2013-M51 -- 354952, 159609
C23Olmen Obs. in Belgium, 2 in MPEC 2013-M51 -- 2013 LN31, 7753
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2013-M51 -- 2013 ML3, 2013 LN31, 285263, 163249
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-M50 -- 2013 MH7
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-M50 -- 2013 MH7
204Schiaparelli Obs. in Italy, 1 in MPEC 2013-M50 -- 2013 MH7
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2013-M50 & 2013-M51 -- 2013 MH7, 2013 MD6, 2013 LK7, 2013 LH16, 2004 LJ
H06iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-M50 -- 2013 MH7
I89iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-M50 -- 2013 MH7
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 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 Sentry1419210942.8e-06-4.58-4.960JPL: "Analysis based on 104 observations spanning 10.607 days (2013-Jun-19.27039 to 2013-Jun-29.87716)." Diameter approximately 0.120 km. from mean, weighted H=22.2.
NEODyS14192085-210951.25e-05-3.93-4.070NEODyS: "Based on 106 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-06-29.878."

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 30 June '13

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

1424Generated Traffic Report
1419Noted 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-M51 - Daily Orbit Update - see above
0457Grabbed MPEC 2013-M50 - 2013 MH7 - see above