Contents  on 13 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 13 July '13

One object reported inside ten LD

One object is reported to be moving within ten lunar distances (LD) of Earth today. 2013 NJ4 is outbound from 7.52 to 8.59 LD.

This report was generated at 1412 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 13 July '13

The MPC's NEO Confirmation Page has 19 listings

When last checked at 2337 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 24 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 13 July '13

Minor Planet Electronic Circulars

As of last check at 2346 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2013-N51 - "18:29 UT" - Comet C/2013 N4 (Borisov)

MPEC 2013-N50 - "18:14 UT" - Comet P/2013 N3 (Panstarrs)

MPEC 2013-N49 - "18:13 UT" - 2008 NO3

MPEC 2013-N48 - "18:00 UT" - Comet P/2003 S1 = 2013 N2 (NEAT)

MPEC 2013-N47 - "14:06 UT" - 2008 GA4

MPEC 2013-N46 - "12:36 UT" - Comet P/1998 U3 = 2013 N1 (Jager)

<< DOU on 13 July '13 >>  MPEC 2013-N45 - "06:02 UT" - Daily Orbit Update

Observers  on 13 July '13

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2013-N51 -- C/2013 N4
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2013-N45 -- 2013 NV, 2013 NL10, 2013 NH10, 2013 MY6, 2013 MR6, 2013 MP11, 2013 GZ79, 2006 WJ3, 162269
I74Baxter Garden Obs. in England, 1 in MPEC 2013-N45 -- 162269
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPEC 2013-N45 -- 2013 NV6, 2013 NV, 2013 NP11, 2013 NO11, 2013 NJ10, 2013 MW6, 2013 MH7, 2013 LF1, 2013 LD1, 2013 KR1, 2013 JX2, 2013 ES89
0954program code 4 via Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2013-N51 -- C/2013 N4
0955program code 5 via Crimean Astrophysical Obs. in the Ukraine, 1 in MPEC 2013-N51 -- C/2013 N4
151Eschenberg Obs. in Switzerland, 1 in MPEC 2013-N45 -- 2007 XY9
J95Great Shefford Obs. in England, 1 in MPEC 2013-N51 -- C/2013 N4
D00ISON-Kislovodsk Obs., 1 in MPEC 2013-N51 -- C/2013 N4
K91LCOGT Sutherland A in South Africa, 2 in MPECs 2013-N45 & 2013-N50 -- 2013 NJ10, P/2013 N3
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2013-N47 & 2013-N49 -- 2008 NO3, 2008 GA4
568_Marco Micheli on Mauna Kea in Hawaii, 1 in MPEC 2013-N50 -- P/2013 N3
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2013-N45 -- 2013 MX5, 2009 DM1
0892Oleksandr V. Shulga via Nikolaev Obs. in the Ukraine, 7 in MPEC 2013-N45 -- 2006 NL, 363790, 361071, 340666, 243147, 163249, 137199
C23Olmen Obs. in Belgium, 1 in MPEC 2013-N45 -- 285263
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPECs 2013-N45 & 2013-N50 -- 2013 NK, P/2013 N3, 2013 MP11, 2010 TN54, 2004 TB18, 189973, 189865, 7341
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2013-N45 -- 2013 GZ79, 2013 EW128, 2010 TN54, 2006 NL, 285263
461SZTE Asteroid Program in Hungary, 1 in MPEC 2013-N46 -- P/2013 N1
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2013-N51 -- C/2013 N4
H36Sandlot Obs. in Kansas, 1 in MPEC 2013-N48 -- P/2013 N2
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2013-N45 -- 2010 LG14
510Siegen Obs. in Germany, 1 in MPEC 2013-N51 -- C/2013 N4
H06|Hidetaka Sato in Japan via iTelescope Obs. Mayhill in New Mexico, 1 in MPEC 2013-N51 -- C/2013 N4
Q621Hidetaka Sato in Japan via iTelescope Obs. Siding Spring in New South Wales, 1 in MPEC 2013-N50 -- P/2013 N3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 July '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2346 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 Sentry1407203016.6e-10-5.78-5.780JPL: "Analysis based on 19 observations spanning 8.7069 days (2013-Jul-04.44266 to 2013-Jul-13.14953)." Diameter approximately 0.630 km. from mean, weighted H=18.6.

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 13 July '13

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

1902Grabbed MPEC 2013-N48 - Comet P/2003 S1 = 2013 N2 (NEAT) - see above
Grabbed MPEC 2013-N49 - 2008 NO3 - see above
Grabbed MPEC 2013-N50 - Comet P/2013 N3 (Panstarrs) - see above
Grabbed MPEC 2013-N51 - Comet C/2013 N4 (Borisov) - see above
1412Generated Traffic Report
1407Noted that JPL Sentry has updated its 2013 NJ10 risk assessment - see above
Grabbed MPEC 2013-N45 - Daily Orbit Update - see above
Grabbed MPEC 2013-N46 - Comet P/1998 U3 = 2013 N1 (Jager) - see above
Grabbed MPEC 2013-N47 - 2008 GA4 - see above