Contents  on 3 July '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 3 July '13

No objects reported inside ten LD

There are no objects reported inside a radius of ten lunar distances (LD) from our world today, and none are known to be coming in until late this month.

This report was generated at 1446 UTC with today's DOU MPEC carrying observation of intruder 2012 DA14 from February.

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 3 July '13

The MPC's NEO Confirmation Page has 39 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 39 objects listed. Of these, 26 were "one nighters." So far The Tracking News has counted a total of 53 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 3 July '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-N05 - "18:52 UT" - 2013 NK

MPEC 2013-N04 - "18:48 UT" - 2013 NJ

<< DOU on 3 July '13 >>  MPEC 2013-N03 - "06:02 UT" - Daily Orbit Update

Observers  on 3 July '13

Sixteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-N03 -- 2013 FY13
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2013-N03, 2013-N04 & 2013-N05 -- 2013 NK, 2013 NJ, 2013 MZ5, 2013 MY5, 2013 MX5, 2013 MW6, 2013 MQ, 2013 LV28
B92Chinon Obs. in France, 1 in MPEC 2013-N03 -- 17188
Z81Estrella de Mar Obs., 1 in MPEC 2013-N03 -- 2013 MX5
F655David Asher in Northern Ireland via Faulkes Telescope North in Hawaii, 1 in MPEC 2013-N03 -- 2010 TN54
157Frasso Sabino Obs. in Italy, 1 in MPEC 2013-N03 -- 2013 GZ79
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-N04 -- 2013 NJ
Q64LCOGT Siding Spring B in New South Wales, 1 in MPEC 2013-N05 -- 2013 NK
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-N03 -- 2013 LH29
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N04 -- 2013 NJ
C91Montevenere Obs., 2 in MPEC 2013-N03 -- 285263, 7888
C23Olmen Obs. in Belgium, 1 in MPEC 2013-N03 -- 7753
F51Pan-STARRS 1 (PS1) in Hawaii, 16 in MPECs 2013-N03, 2013-N04 & 2013-N05 -- 2013 NK, 2013 NJ, 2013 LV28, 2013 EU9, 2010 TN54, 2002 QD7, 90373, 86039, 306367, 220839, 19356, 193178, 189630, 138155, 7350, 7341
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2013-N03 -- 2013 ML3, 2007 XY9, 2002 LT24, 285263
C95SATINO-1 in France, 1 in MPEC 2013-N03 -- 2012 DA14
B38Santa Mama Obs. in Italy, 2 in MPEC 2013-N03 -- 137170, 11405
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-N03 -- 3691
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 July '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 ML3NEODyS18022103-210952.02e-05-3.75-3.820NEODyS: "Based on 122 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-07-02.318."
JPL Sentry1703210943.9e-06-4.47-4.840JPL: "Analysis based on 120 observations spanning 13.047 days (2013-Jun-19.27039 to 2013-Jul-02.31703)." Diameter approximately 0.120 km. from mean, weighted H=22.3.

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 3 July '13

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

1906Grabbed MPEC 2013-N04 - 2013 NJ - see above
Grabbed MPEC 2013-N05 - 2013 NK - see above
1802Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
1703Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
1446Generated Traffic Report
1440Grabbed MPEC 2013-N03 - Daily Orbit Update - see above