Contents  on 12 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 12 July '13

One object reported inside ten LD

One object is reported to be within ten lunar distances (LD) of our planet today. 2013 NJ4 is outbound from 6.52 to 7.52 LD.

This report was generated at 1325 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 12 July '13

The MPC's NEO Confirmation Page has 7 listings

When last checked at 2313 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of twelve 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 12 July '13

Minor Planet Electronic Circulars

As of last check at 2313 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-N44 - "09:59 UT" - 2013 NT11

MPEC 2013-N43 - "09:55 UT" - 2013 NS11

<< DOU on 12 July '13 >>  MPEC 2013-N42 - "06:02 UT" - Daily Orbit Update

Observers  on 12 July '13

Seventeen observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2013-N44 -- 2013 NT11
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2013-N42 & 2013-N43 -- 2013 NX, 2013 NS11, 2013 NK, 2013 MY6, 2013 MY5, 2013 MX5, 2013 MR6, 2013 MP11, 2013 LW28, 2013 LF16, 2013 LB1, 2013 JQ22, 2013 GZ79, 2013 GC34, 2011 DL19, 2004 FE5, 350964, 101873
I74Baxter Garden Obs. in England, 1 in MPEC 2013-N42 -- 340666
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2013-N44 -- 2013 NT11
J95Great Shefford Obs. in England, 3 in MPECs 2013-N42, 2013-N43 & 2013-N44 -- 2013 NT11, 2013 NS11, 2013 ML3
W85LCOGT Cerro Tololo A in Chile, 1 in MPEC 2013-N42 -- 2013 LF7
K91LCOGT Sutherland A in South Africa, 2 in MPECs 2013-N42 & 2013-N44 -- 2013 NT11, 52760
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N43 -- 2013 NS11
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2013-N42 -- 2013 MY6
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2013-N42 -- 2003 HG2
C23Olmen Obs. in Belgium, 1 in MPEC 2013-N42 -- 285263
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPECs 2013-N42 & 2013-N43 -- 2013 NS11, 101873
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-N44 -- 2013 NT11
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-N44 -- 2013 NT11
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-N44 -- 2013 NT11
E12Siding Spring Survey in New South Wales, 1 in MPEC 2013-N44 -- 2013 NT11
A92Urseanu Obs. in Romania, 2 in MPEC 2013-N42 -- 243147, 17188
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 July '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2313 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 Sentry1322210947.1e-07-5.21-5.460JPL: "Analysis based on 158 observations spanning 22.727 days (2013-Jun-19.27039 to 2013-Jul-11.99773)." 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 12 July '13

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

1325Generated Traffic Report
1322Noted that JPL Sentry has updated its 2013 ML3 risk assessment - see above
Grabbed MPEC 2013-N42 - Daily Orbit Update - see above
Grabbed MPEC 2013-N43 - 2013 NS11 - see above
Grabbed MPEC 2013-N44 - 2013 NT11 - see above