Contents  on 22 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 22 November '13

Three objects reported inside ten LD

Within ten lunar distances (LD) of Earth there are three objects reported passing today. Radar target 2001 AV43 exits Earth's Hill sphere, traveling from 3.87 to 4.43 LD. More distant, radar target 2013 NJ is inbound from 6.77 to 5.38 LD and 2013 VK13 departs from inside ten LD, moving from 9.87 to 11.35 LD.

This report was generated at 1615 UTC.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 22 November '13

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. So far The Tracking News has counted a total of six 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 22 November '13

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 22 Nov. '13 >>  MPEC 2013-W09 - "17:43 UT" - Daily Orbit Update

Observers  on 22 November '13

Seven observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2013-W09 -- 377732
703Catalina Sky Survey in Arizona, 1 in MPEC 2013-W09 -- 2005 RO33
006Fabra Obs. in Spain, 1 in MPEC 2013-W09 -- 2013 UR3
E108program code 8 via Faulkes Telescope South in New South Wales, 2 in MPEC 2013-W09 -- 2013 UQ4, 2013 UF3
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-W09 -- 2013 NJ15
D29Purple Mtn. Obs. Xuyi Station in China, 5 in MPEC 2013-W09 -- 2013 TH5, 89355, 363790, 8014, 1943
I89"program code '"' (11) via iTelescope Obs. Nerpio in Spain, 1 in MPEC 2013-W09 -- 2013 VO5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 November '13

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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 VC13NEODyS1614R E M O V E D-
2013 UR1NEODyS16142050-206742.03e-06-6.63-6.670NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2013-10-23.381 to 2013-10-30.417."
2011 BA60JPL Sentry02592029-2106171.1e-08-6.24-6.600JPL: "Analysis based on 7 observations spanning 1.9754 days (2011-Jan-29.26046 to 2011-Jan-31.235902)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
2010 XQJPL Sentry00272031-2112492.8e-07-6.57-7.050JPL: "Analysis based on 15 observations spanning .12618 days (2010-Dec-02.30871 to 2010-Dec-02.43489)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
2010 WW8JPL Sentry02592015-2101576.3e-08-7.48-8.230JPL: "Analysis based on 11 observations spanning .06622 days (2010-Nov-30.37333 to 2010-Nov-30.43955)." Diameter approximately 0.020 km. from mean, weighted H=26.1.
2010 VQ139JPL Sentry02592078-208222.6e-10-10.47-10.70JPL: "Analysis based on 11 observations spanning .04669 days (2010-Nov-14.32797 to 2010-Nov-14.37466)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
2010 VO139JPL Sentry02592022-21111192.2e-06-6.10-7.090JPL: "Analysis based on 11 observations spanning .19581 days (2010-Nov-14.22693 to 2010-Nov-14.42274)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
2008 YC29JPL Sentry0534209532.8e-08-7.88-8.110JPL: "Analysis based on 18 observations spanning .13666 days (2008-Dec-30.42237 to 2008-Dec-30.55903)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
2008 VS4JPL Sentry00272015-21102546.9e-07-5.42-6.120JPL: "Analysis based on 10 observations spanning .08330 days (2008-Nov-07.413 to 2008-Nov-07.4963)." Diameter approximately 0.050 km. from mean, weighted H=24.2.
2008 VLJPL Sentry02592021-20933671.1e-05-6.37-7.410JPL: "Analysis based on 7 observations spanning .12404 days (2008-Nov-02.31035 to 2008-Nov-02.43439)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
2008 JD33JPL Sentry00272016-2095289.3e-09-8.44-8.930JPL: "Analysis based on 13 observations spanning .11183 days (2008-May-15.28689 to 2008-May-15.39872)." Diameter approximately 0.016 km. from mean, weighted H=27.0.
2005 GQ33JPL Sentry02592051-211274.7e-09-7.53-7.930JPL: "Analysis based on 16 observations spanning .71055 days (2005-Apr-06.32956 to 2005-Apr-07.04011)." Diameter approximately 0.062 km. from mean, weighted H=23.7.
29075 1950 DAJPL Sentry1614288014.4e-04-0.58-0.58n/aJPL: "Analysis based on 8 radar delay, 5 Doppler, and 454 optical observations spanning 22899.0 days (1950-Feb-22.230140 to 2012-Nov-02.272872)." Diameter approximately 1.300 km. from mean, weighted H=17.6.

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 22 November '13

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

1902Grabbed MPEC 2013-W09 - Daily Orbit Update - see above
1615Generated Traffic Report
1614Noted that JPL Sentry has reposted 29075 1950 DA as an impact risk - see above
Noted that NEODyS has updated its 2013 UR1 risk assessment - see above
Noted that NEODyS has removed 2013 VC13 as an impact risk - see above
0534Noted that JPL Sentry has updated its 2008 YC29 risk assessment - see above
0259Noted that JPL Sentry has updated its 2005 GQ33 risk assessment - see above
Noted that JPL Sentry has updated its 2008 VL risk assessment - see above
Noted that JPL Sentry has updated its 2010 VO139 risk assessment - see above
Noted that JPL Sentry has updated its 2010 VQ139 risk assessment - see above
Noted that JPL Sentry has updated its 2010 WW8 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BA60 risk assessment - see above
0027Noted that JPL Sentry has updated its 2008 JD33 risk assessment - see above
Noted that JPL Sentry has updated its 2008 VS4 risk assessment - see above
Noted that JPL Sentry has updated its 2010 XQ risk assessment - see above