Contents  on 10 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 10 July '13

One object reported inside ten LD

There is one object reported inside ten lunar distances (LD) from our planet today. 2013 NJ4 is heading out from 4.82 to 5.60 LD.

This report was generated at 1530 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 10 July '13

The MPC's NEO Confirmation Page has 11 listings

When last checked at 1828 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eleven objects listed. Of these, one was a "one nighter." So far The Tracking News has counted a total of seventeen 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 10 July '13

Minor Planet Electronic Circulars

As of last check at 1828 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 10 July '13 >>  MPEC 2013-N37 - "06:02 UT" - Daily Orbit Update

Observers  on 10 July '13

Fourteen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2013-N37 -- 2013 NX, 2013 MY6, 2013 MR6, 2013 MR, 2013 ML3, 2013 LH16, 2013 LB2, 2013 GZ79, 2013 GY68
I74Baxter Garden Obs. in England, 2 in MPEC 2013-N37 -- 340666, 162269
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2013-N37 -- 2003 LO6
K20Danastro Obs., 1 in MPEC 2013-N37 -- 17188
J95Great Shefford Obs. in England, 2 in MPEC 2013-N37 -- 2013 NL10, 2013 ML3
K91LCOGT Sutherland A in South Africa, 2 in MPEC 2013-N37 -- 2013 NJ10, 2013 NH10
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2013-N37 -- 2013 ML3, 2013 LE7
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N37 -- 2013 NM8
900Moriyama Obs. in Japan, 1 in MPEC 2013-N37 -- 2013 NQ8
474Mt. John Obs. in New Zealand, 1 in MPEC 2013-N37 -- 2013 MH7
C23Olmen Obs. in Belgium, 1 in MPEC 2013-N37 -- 285263
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPEC 2013-N37 -- 365449, 363075, 209924, 19356, 137199
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2013-N37 -- 2013 GZ79, 2013 EW128, 2011 DL19, 2007 XY9, 2006 NL
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-N37 -- 5653
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2013-N37 -- 2011 GD3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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 NJ10JPL Sentry15122069-211263.7e-08-4.65-4.730JPL: "Analysis based on 13 observations spanning 5.4208 days (2013-Jul-04.44266 to 2013-Jul-09.863462)." Diameter approximately 0.612 km. from mean, weighted H=18.7.
NEODyS15122028-202811.08e-07-3.47-3.470NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2013-07-04.443 to 2013-07-09.864."
2013 ML3JPL Sentry1512210946.6e-07-5.25-5.510JPL: "Analysis based on 151 observations spanning 19.758 days (2013-Jun-19.27039 to 2013-Jul-09.02803)." Diameter approximately 0.120 km. from mean, weighted H=22.3.
NEODyS15122109-210951.82e-06-4.81-4.910NEODyS: "Based on 153 optical observations (of which 6 are rejected as outliers) from 2013-06-19.271 to 2013-07-09.029."

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 10 July '13

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

1530Generated Traffic Report
1512Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Noted that NEODyS has updated its 2013 ML3 risk assessment - see above
Noted that JPL Sentry has updated its 2013 NJ10 risk assessment - see above
Noted that NEODyS has posted 2013 NJ10 as an impact risk - see above
Grabbed MPEC 2013-N37 - Daily Orbit Update - see above