Contents  on 14 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 14 July '13

One object reported inside ten LD

One asteroid is reported to be within ten lunar distances (LD) of our planet today. 2013 NJ4 is moving away, from 8.59 to 9.69 LD.

Both of the next objects known to be approaching have huge uncertainties. JPL's best calculation has 2006 BL8 arriving inside ten LD on July 24th (+/- two days) and 2003 DZ15 on July 29th (+/- 26.5 hours). Given that the Earth moves through its own radius in about seven minutes, there's a good chance we won't be there when either object approaches our orbit, and the nature of these apparitions is that both objects could escape detection on this passage.

This report was updated at 1917 UTC with newly discovered and already departed 2013 NR13 (MPEC). Today's first traffic report was generated at 1251 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 14 July '13

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, 23 were "one nighters." So far The Tracking News has counted a total of 38 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 14 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-N54 - "16:02 UT" - 2013 NS13

MPEC 2013-N53 - "15:58 UT" - 2013 NR13

<< DOU on 14 July '13 >>  MPEC 2013-N52 - "06:03 UT" - Daily Orbit Update

Observers  on 14 July '13

Eleven observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 18 in MPECs 2013-N52 & 2013-N54 -- 2013 NW, 2013 NV, 2013 NS13, 2013 MY6, 2013 MR6, 2013 LW28, 2013 LK31, 2013 GZ79, 2012 AN23, 2011 PW6, 2011 KE3, 359592, 354952, 350964, 190135, 162269, 153002, 11405
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 5 in MPECs 2013-N52 & 2013-N53 -- 2013 NR13, 2013 NP11, 2013 LE16, 2012 US9, 2008 VN
J95Great Shefford Obs. in England, 1 in MPEC 2013-N54 -- 2013 NS13
D35Lulin Minor Bodies Tracking (LIMIT) in Taiwan, 2 in MPEC 2013-N52 -- 2013 NV, 2013 LM31
568_Marco Micheli on Mauna Kea in Hawaii, 2 in MPECs 2013-N53 & 2013-N54 -- 2013 NS13, 2013 NR13
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2013-N52 -- 2013 GY68
G34Oberfrauendorf Obs., 1 in MPEC 2013-N52 -- 285263
C23Olmen Obs. in Belgium, 1 in MPEC 2013-N52 -- 2007 XY9
F51Pan-STARRS 1 (PS1) in Hawaii, 10 in MPECs 2013-N52, 2013-N53 & 2013-N54 -- 2013 NX, 2013 NS13, 2013 NR13, 2008 DK5, 2005 MC, 2002 FD, 363075, 302800, 220839, 189973
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2013-N52 -- 2013 MX5, 2013 GZ79, 2011 DL19, 2007 XY9, 294739, 285263
204Schiaparelli Obs. in Italy, 8 in MPEC 2013-N52 -- 2013 MY6, 2013 EW128, 2012 VN82, 2010 TN54, 2010 LG14, 2009 WR6, 2008 JR26, 2003 OV
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 NJ10NEODyS1918R E M O V E D-

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 14 July '13

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

1918Noted that NEODyS has removed 2013 NJ10 as an impact risk - see above
1917Updated Traffic Report
1631Grabbed MPEC 2013-N53 - 2013 NR13 - see above
Grabbed MPEC 2013-N54 - 2013 NS13 - see above
1248Grabbed MPEC 2013-N52 - Daily Orbit Update - see above