Contents  on 13 November '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 November '13

Four objects reported inside ten LD

There are four asteroids reported flying within ten lunar distances (LD) of Earth today. Radar target 2001 AV43 is inbound from 5.54 to 4.90 LD and 2011 JY1 from 7.37 to 6.70 LD, while the other two depart from inside ten LD: 2013 VK11 passes from 8.68 to 10.35 LD and intruder 2013 VJ11 from 8.97 to 11.03 LD.

Headed our way next, 2013 VK13 arrives inside ten LD on November 17th and radar target 2013 NJ arrives on November 19th.

This report was updated at 1940 UTC with the discovery of already departed risk-listed 2013 VW13 (MPEC). Today's first traffic report was generated at 1622 UTC, noting that additional radar astrometry was posted late yesterday for 2011 JY1 (not announced or listed as a radar target). No DOU MPEC has been issued yet today.

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 November '13

The MPC's NEO Confirmation Page has 15 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had fifteen objects listed. Of these, five were "one nighters." So far The Tracking News has counted a total of 23 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 November '13

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts. No Daily Orbit Update DOU MPEC has been posted yet, so visit the MPC Status Page for possible explanation.

MPEC 2013-V88 - "17:17 UT" - 2013 VY13

MPEC 2013-V87 - "17:12 UT" - 2013 VX13

MPEC 2013-V86 - "17:07 UT" - 2013 VW13

MPEC 2013-V85 - "16:59 UT" - 2013 VV13

MPEC 2013-V84 - "04:33 UT" - 2003 ME7

Observers  on 13 November '13

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 3 in MPECs 2013-V85, 2013-V86 & 2013-V87 -- 2013 VX13, 2013 VW13, 2013 VV13
300Bisei Spaceguard Center in Japan, 1 in MPEC 2013-V88 -- 2013 VY13
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-V88 -- 2013 VY13
970Chelmsford Obs. in England, 1 in MPEC 2013-V88 -- 2013 VY13
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2013-V88 -- 2013 VY13
J95Great Shefford Obs. in England, 3 in MPECs 2013-V85, 2013-V86 & 2013-V87 -- 2013 VX13, 2013 VW13, 2013 VV13
K38M57 Obs., 1 in MPEC 2013-V88 -- 2013 VY13
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-V84 -- 2003 ME7
711McDonald Obs. in Texas, 1 in MPEC 2013-V88 -- 2013 VY13
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2013-V85, 2013-V86 & 2013-V87 -- 2013 VX13, 2013 VW13, 2013 VV13
A24New Millennium Obs. in Italy, 1 in MPEC 2013-V88 -- 2013 VY13
J41Raheny Obs. in Ireland, 1 in MPEC 2013-V88 -- 2013 VY13
H36Sandlot Obs. in Kansas, 2 in MPECs 2013-V87 & 2013-V88 -- 2013 VY13, 2013 VX13
204Schiaparelli Obs. in Italy, 3 in MPECs 2013-V86, 2013-V87 & 2013-V88 -- 2013 VY13, 2013 VX13, 2013 VW13
291Spacewatch 1.8m telescope in Arizona, 2 in MPECs 2013-V85 & 2013-V86 -- 2013 VW13, 2013 VV13
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 13 November '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 VW13JPL Sentry19192074-2097168.5e-05-4.65-4.850JPL: "Analysis based on 23 observations spanning 1.0080 days (2013-Nov-12.17353 to 2013-Nov-13.181509)." Diameter approximately 0.019 km. from mean, weighted H=26.2.
2010 VP139JPL Sentry05032014-21091162.1e-06-7.63-8.500JPL: "Analysis based on 12 observations spanning .04588 days (2010-Nov-14.27911 to 2010-Nov-14.32499)." Diameter approximately 0.006 km. from mean, weighted H=28.7.
2009 VZ39JPL Sentry05032013-21107866.9e-06-6.26-7.480JPL: "Analysis based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546)." Diameter approximately 0.009 km. from mean, weighted H=27.9.

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 November '13

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

1940Updated Traffic Report
1919Noted that JPL Sentry has posted 2013 VW13 as an impact risk - see above
1801Grabbed MPEC 2013-V86 - 2013 VW13 - see above
Grabbed MPEC 2013-V87 - 2013 VX13 - see above
Grabbed MPEC 2013-V88 - 2013 VY13 - see above
1708Grabbed MPEC 2013-V85 - 2013 VV13 - see above
0503Noted that JPL Sentry has updated its 2009 VZ39 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VP139 risk assessment - see above
Grabbed MPEC 2013-V84 - 2003 ME7 - see above