Contents  on 11 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 11 November '13

Six objects reported inside ten LD

Six asteroids are reported passing within ten lunar distances (LD) of Earth today. Risk-listed intruder 2013 VJ11 is outbound from 4.88 to 6.92 LD, 2013 VK11 from 5.95 to 7.17 LD, and 2013 VO11 from 7.38 to 9.64 LD, and 2013 UE1 leaves our ten-LD reporting "bubble," traveling from 9.57 to 10.95 LD. Meanwhile, radar target 2001 AV43 is inbound from 6.92 to 6.22 LD and 2011 JY1 comes inside the bubble, moving from 10.80 to 8.85 LD.

Next up, radar target 2013 NJ arrives inside ten LD on November 19th.

This report was updated at 2259 UTC with first follow-up for (no longer) risk-rated intruder 2013 VJ11 from radar. Today's first traffic report was generated at 1628 UTC with the discovery announced late yesterday of departed 2013 VY11 (MPEC) and with follow-up in today's DOU MPEC for 2013 VK11 and for departed 2013 VP11 as well as risk-listed departed objects 2013 VM5 and 2013 TV132.

Report:  It is rare and possibly unprecedented for the first follow-up observation of a tiny new close-approaching asteroid to come from radar, which is exactly what was reported today. Usually an optical observing campaign is required before radar can be usefully employed. 2013 VJ11 was first spotted from Arizona at 0838 on November 9th UT by the Catalina Sky Survey, which followed it for three hours and reported 15 positions. The intruder had flown through the Earth-Moon system the day before and, at discovery, was outbound at 1.67 LD. Schiaparelli Observatory in Italy picked up the tiny object (perhaps nine meters in diameter) 15 hours later and reported five positions over 20 minutes, with the last at 0234 UT on the 10th. A discovery MPEC was posted by the IAU Minor Planet Center with a time stamp of 0314 and, at 0514 and 0535 UT, Arecibo bounced signals off the escapee when it was at 3.31 and 3.33 LD from Earth. Today the radar data was reported and JPL removed the object's risk rating.

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.

Radar Astrometry  on 11 November '13

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2116 UTC when the database was dated 11 Nov.

Data update noted at 2359 UTC when the database was dated 11 Nov.

NEOCP Activity  on 11 November '13

The MPC's NEO Confirmation Page has 47 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 47 objects listed. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 53 listings on the NEOCP today.

New MPECs  on 11 November '13

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 11 Nov. '13 >>  MPEC 2013-V65 - "06:09 UT" - Daily Orbit Update

Observers  on 11 November '13

Nineteen observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 2013 VJ11, 2011 JY1
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPEC 2013-V65 -- 2013 UR3, 2013 UK, 2013 UH9, 2013 UG5, 2013 TW135, 2013 TS135, 2013 TH135, 2013 SC25, 2013 PH3, 2010 UX95, 2009 CR2, 2008 JR26, 2006 WS1, 85938
U82CS3 Palmer Divide Station in southern California, 1 in MPEC 2013-V65 -- 368664
703Catalina Sky Survey (CSS) in Arizona, 15 in MPEC 2013-V65 -- 2013 VM4, 2013 UR3, 2013 TE, 2008 KZ5, 1998 YB8, 85709, 85628, 53435, 53110, 355046, 249595, 162913, 8176, 5863, 1627
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2013-V65 -- 2013 VK5
448Desert Moon Obs. in New Mexico, 4 in MPEC 2013-V65 -- 2013 VP11, 2013 UB1, 249595, 162581
Z81Estrella de Mar Obs., 4 in MPEC 2013-V65 -- 2013 VO5, 2013 VJ2, 2011 WM2, 18109
006Fabra Obs. in Spain, 2 in MPEC 2013-V65 -- 142781, 9950
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2013-V65 -- 355046
K48Keyhole Obs., 2 in MPEC 2013-V65 -- 251346, 162566
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2013-V65 -- 2013 TV132
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPEC 2013-V65 -- 2013 TE6, 2009 FU4, 2004 XN14, 2004 HX53, 2001 NZ1, 2000 HW23, 68031, 374038
I41Palomar Transient Factory (PTF) in southern California, 4 in MPEC 2013-V65 -- 2013 US3, 2013 ON5, 1990 UP, 39565
C95SATINO-1 in France, 1 in MPEC 2013-V65 -- 2003 UP24
K90Sopot Obs., 1 in MPEC 2013-V65 -- 162566
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2013-V65 -- 2013 UC, 2004 DD
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2013-V65 -- 2013 VZ4, 2013 VW4, 2013 VQ4, 2013 VN4, 2013 VM5, 2013 UU1, 2013 TV144, 2010 JF87
926Tenagra II Obs. in Arizona, 8 in MPEC 2013-V65 -- 2013 VP11, 2013 VM2, 2013 VK11, 2013 VC10, 2013 VA10, 2013 UP1, 2010 SL13, 12923
718Wiggins Obs. in Utah, 1 in MPEC 2013-V65 -- 2013 VO5
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 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 VJ11JPL Sentry2206R E M O V E DJPL: Risk listing removed at 2202 UTC.
2013 VM5JPL Sentry15202036-210445.9e-08-7.47-7.770JPL: "Analysis based on 18 observations spanning 5.9887 days (2013-Nov-04.4356 to 2013-Nov-10.42426)." Diameter approximately 0.032 km. from mean, weighted H=25.2.
NEODyS15202085-210235.86e-08-7.43-7.70NEODyS: "Based on 19 optical observations (of which 1 are rejected as outliers) from 2013-11-04.436 to 2013-11-10.425."
2013 VZ4JPL Sentry15202063-209551.0e-05-4.28-4.590JPL: "Analysis based on 25 observations spanning 5.9763 days (2013-Nov-04.43691 to 2013-Nov-10.41319)." Diameter approximately 0.081 km. from mean, weighted H=23.1.
NEODyS15202063-209531.72e-05-4.06-4.310NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2013-11-04.438 to 2013-11-10.414."
2013 VF2JPL Sentry1912R E M O V E DJPL: Risk listing removed at 1711 UTC.
2013 TV132JPL Sentry15202099-211161.5e-06-6.92-7.420JPL: "Analysis based on 33 observations spanning 20.994 days (2013-Oct-12.39906 to 2013-Nov-02.392943)." Diameter approximately 0.017 km. from mean, weighted H=26.5.
NEODyS15202111-211158.66e-07-7.17-7.490NEODyS: "Based on 34 optical observations (of which 1 are rejected as outliers) from 2013-10-12.400 to 2013-11-02.394."

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 11 November '13

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

2359Noted Radar Astrometry database update - see above
2259Updated Traffic Report
2206Noted that JPL Sentry has removed 2013 VJ11 as an impact risk - see above
2116Noted Radar Astrometry database update - see above
1912Noted that JPL Sentry has removed 2013 VF2 as an impact risk - see above
1520Noted that JPL Sentry has updated its 2013 TV132 risk assessment - see above
Noted that NEODyS has updated its 2013 TV132 risk assessment - see above
Noted that JPL Sentry has updated its 2013 VM5 risk assessment - see above
Noted that NEODyS has updated its 2013 VM5 risk assessment - see above
Noted that JPL Sentry has updated its 2013 VZ4 risk assessment - see above
Noted that NEODyS has updated its 2013 VZ4 risk assessment - see above
Grabbed MPEC 2013-V65 - Daily Orbit Update - see above