Contents  on 23 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 23 November '12

Four objects reported inside ten LD

Four objects are reported inside ten lunar distances (LD) of our planet today. Newly announced risk-listed 2012 WR10 is preliminarily calculated to be outbound from 4.7 to 5.3 LD, lost 2012 VN76 is estimated to be headed away from 8.8 to 9.8 LD, risk-listed intruder 2012 VJ38 leaves ten LD, moving from 9.18 to 10.19 LD, and radar target 2010 JK1 is inbound from 9.82 to 9.48 LD.

Coming our direction next, 2012 WH1 arrives inside ten LD on November 25th and 2009 BS5 arrives on December 7th.

This report was updated at 2317 UTC with new discovery 2012 WR10 (MPEC), and modifed two minutes later with this object's addition to JPL's risk list. Today's first traffic report was posted at 1713 UTC with follow-up in today's DOU MPEC for 2012 WH1 as well as departed 2012 WF (adding four days to a two-day observing arc) and 2012 VR76 (adding five days to a four-day arc).

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 23 November '12

The MPC's NEO Confirmation Page has 13 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had thirteen objects listed. Of these, seven were "one nighters." So far The Tracking News has counted a total of 26 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 23 November '12

Minor Planet Electronic Circulars

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

MPEC 2012-W42 - "21:07 UT" - 2012 WS10

MPEC 2012-W41 - "21:05 UT" - 2012 WR10

MPEC 2012-W40 - "21:01 UT" - 2012 WQ10

MPEC 2012-W39 - "19:27 UT" - 2010 VW98

<< DOU on 23 Nov. '12 >>  MPEC 2012-W38 - "06:06 UT" - Daily Orbit Update

MPEC 2012-W37 - "02:16 UT" - 2012 WL4

MPEC 2012-W36 - "02:13 UT" - 2012 WK4

MPEC 2012-W35 - "02:11 UT" - 2012 WJ4

MPEC 2012-W34 - "02:08 UT" - 2012 WH4

Observers  on 23 November '12

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2012-W34, 2012-W35, 2012-W36, 2012-W38, 2012-W39, 2012-W40 & 2012-W41 -- 2012 WR10, 2012 WQ10, 2012 WK4, 2012 WJ4, 2012 WH4, 2012 VF46, 2012 TQ78, 2012 TO231, 2012 TJ146, 2012 QB17, 2012 HY33, 2010 VW98
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2012-W38, 2012-W39, 2012-W40, 2012-W41 & 2012-W42 -- 2012 WS10, 2012 WR10, 2012 WQ10, 2012 JR17, 2010 VW98, 2005 UC, 340048, 329275, 237442, 162004, 138852, 137044
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 3 in MPECs 2012-W34, 2012-W36 & 2012-W37 -- 2012 WL4, 2012 WK4, 2012 WH4
I39Cruz del Sur Obs. in Argentina, 1 in MPEC 2012-W36 -- 2012 WK4
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2012-W36 -- 2012 WK4
B86Hagen Obs. in Germany, 2 in MPECs 2012-W35 & 2012-W36 -- 2012 WK4, 2012 WJ4
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-W38 -- 2012 WH1
704LINEAR in New Mexico, 1 in MPEC 2012-W35 -- 2012 WJ4
B28Mandi Obs. in Italy, 1 in MPEC 2012-W35 -- 2012 WJ4
932McCarthy Obs. in Connecticut, 1 in MPEC 2012-W35 -- 2012 WJ4
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2012-W38 -- 2012 TA79
474Mt. John Obs. in New Zealand, 1 in MPEC 2012-W34 -- 2012 WH4
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-W34 -- 2012 WH4
A24New Millennium Obs. in Italy, 1 in MPEC 2012-W35 -- 2012 WJ4
H23Pear Tree Obs. in Florida, 1 in MPEC 2012-W38 -- 333358
H36Sandlot Obs. in Kansas, 5 in MPECs 2012-W35, 2012-W36, 2012-W37, 2012-W39 & 2012-W41 -- 2012 WR10, 2012 WL4, 2012 WK4, 2012 WJ4, 2010 VW98
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2012-W35 -- 2012 WJ4
204Schiaparelli Obs. in Italy, 2 in MPECs 2012-W35 & 2012-W36 -- 2012 WK4, 2012 WJ4
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2012-W36 & 2012-W37 -- 2012 WL4, 2012 WK4
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2012-W38 -- 2006 WN1, 141079, 136795, 8034
291Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2012-W34, 2012-W38, 2012-W39, 2012-W40, 2012-W41 & 2012-W42 -- 2012 WS10, 2012 WR10, 2012 WQ10, 2012 WH4, 2012 WF, 2012 VZ36, 2012 VR76, 2012 VM76, 2012 VL6, 2012 VG6, 2012 VF26, 2012 VE82, 2012 UR138, 2012 TB259, 2010 VW98, 1999 UR
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 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 WS10JPL Sentry23192069-2111142.0e-07-6.82-7.100JPL: "Analysis based on 16 observations spanning .90475 days (2012-Nov-22.3853 to 2012-Nov-23.29005)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
2012 WR10JPL Sentry23192098-210421.0e-07-9.14-9.170JPL: "Analysis based on 20 observations spanning 1.0790 days (2012-Nov-22.21759 to 2012-Nov-23.2966)." Diameter approximately 0.007 km. from mean, weighted H=28.4.

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 23 November '12

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

2319Noted that JPL Sentry has posted 2012 WR10 as an impact risk - see above
Noted that JPL Sentry has posted 2012 WS10 as an impact risk - see above
2317Updated Traffic Report
2135Grabbed MPEC 2012-W42 - 2012 WS10 - see above
2106Grabbed MPEC 2012-W40 - 2012 WQ10 - see above
Grabbed MPEC 2012-W41 - 2012 WR10 - see above
1936Grabbed MPEC 2012-W39 - 2010 VW98 - see above
1710Grabbed MPEC 2012-W38 - Daily Orbit Update - see above
0304Grabbed MPEC 2012-W34 - 2012 WH4 - see above
Grabbed MPEC 2012-W35 - 2012 WJ4 - see above
Grabbed MPEC 2012-W36 - 2012 WK4 - see above
Grabbed MPEC 2012-W37 - 2012 WL4 - see above