Contents  on 26 November '12

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 26 November '12

Three objects reported inside ten LD

Three asteroids are reported to be inside ten lunar distances (LD) of Earth today. Risk-listed 2012 WR10 is outbound from 6.58 to 7.24 LD and radar target 2010 JK1 from 9.25 to 9.38 LD, and 2012 WH1 is inbound from 9.81 to 8.77 LD.

Next up, 2009 BS5 arrives inside ten LD on December 7th.

This report was updated at 2014 UTC with radar observation of 2010 JK1. Today's first traffic report was generated at 1603 UTC with follow-up in today's DOU MPEC for 2012 WR10, 2012 WH1, 2010 JK1, and departed risk-listed 2012 WS3.

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 26 November '12

Radar observation of one object

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

Data update noted at 2011 UTC when the database was dated 26 Nov.

NEOCP Activity  on 26 November '12

The MPC's NEO Confirmation Page has 6 listings

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

New MPECs  on 26 November '12

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 2012-W52 - "15:54 UT" - 2012 WM28

<< DOU on 26 Nov. '12 >>  MPEC 2012-W51 - "06:07 UT" - Daily Orbit Update

MPEC 2012-W50 - "00:11 UT" - 2012 PG5

Observers  on 26 November '12

A total of 21 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2012-W51 & 2012-W52 -- 2012 WQ10, 2012 WM28
I47Auger Obs. in Argentina, 1 in MPEC 2012-W51 -- 4179
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2012-W51 & 2012-W52 -- 2012 WM28, 1998 XX2, 329275, 220839, 219071, 5587, 3908
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2012-W50 & 2012-W51 -- 2012 WS10, 2012 WL4, 2012 VM82, 2012 TZ52, 2012 SD22, 2012 QO10, 2012 PG5, 2012 KL45, 2012 KK18, 330233, 285540, 277127, 162082, 141874, 7888
448Desert Moon Obs. in New Mexico, 4 in MPEC 2012-W51 -- 2012 TJ146, 330825, 276397, 162082
F658David Tholen's team in Hawaii via Faulkes Telescope North in Hawaii, 2 in MPEC 2012-W51 -- 2012 VJ82, 2012 UA34
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2010 JK1
D00ISON-Kislovodsk Obs., 1 in MPEC 2012-W51 -- 1864
C10Maisoncelles Obs. in France, 1 in MPEC 2012-W51 -- 3200
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-W51 -- 2012 MB7
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-W52 -- 2012 WM28
566NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2012-W50 -- 2012 PG5
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-W51 -- 2012 PG5, 66146, 162011, 153958, 141354, 887
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-W51 -- 2012 WH1, 2012 US136, 2012 TA79, 2012 QF49, 2012 HJ1, 192563
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-W51 & 2012-W52 -- 2012 WM28, 2010 VW98
260&Rob Matson in southern California using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2012-W50 -- 2012 PG5
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2012-W51 -- 2012 WL4, 2010 JK1, 330233
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2012-W51 -- 2012 VF37, 2012 TA79
291Spacewatch 1.8m telescope in Arizona, 16 in MPEC 2012-W51 -- 2012 WS3, 2012 WR10, 2012 VZ25, 2012 VN82, 2012 VL94, 2012 VJ82, 2012 VJ6, 2012 VG6, 2012 VF37, 2012 VF26, 2012 VE37, 2012 VC6, 2010 VW98, 2009 SC15, 2005 CR37, 2001 QJ142
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-W51 -- 192563
718Wiggins Obs. in Utah, 1 in MPEC 2012-W51 -- 2012 WH1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 November '12

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
2012 WR10JPL Sentry16012087-210839.4e-07-8.11-8.550JPL: "Analysis based on 26 observations spanning 3.0073 days (2012-Nov-22.21759 to 2012-Nov-25.22489)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
NEODyS16012096-209941.12e-07-9.05-9.330NEODyS: "Based on 26 optical observations (of which 1 are rejected as outliers) from 2012-11-22.218 to 2012-11-25.226."
2012 WS3JPL Sentry16012065-2112487.2e-05-4.92-5.670JPL: "Analysis based on 45 observations spanning 4.9324 days (2012-Nov-20.32726 to 2012-Nov-25.25969)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
NEODyS16012080-2100162.06e-06-6.40-6.960NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2012-11-20.328 to 2012-11-25.260."

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 26 November '12

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

2014Updated Traffic Report
2011Noted Radar Astrometry database update - see above
1601Noted that JPL Sentry has updated its 2012 WR10 risk assessment - see above
Noted that NEODyS has updated its 2012 WR10 risk assessment - see above
Noted that JPL Sentry has updated its 2012 WS3 risk assessment - see above
Noted that NEODyS has updated its 2012 WS3 risk assessment - see above
Grabbed MPEC 2012-W51 - Daily Orbit Update - see above
Grabbed MPEC 2012-W52 - 2012 WM28 - see above
0018Grabbed MPEC 2012-W50 - 2012 PG5 - see above