Contents  on 21 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 21 November '12

Three objects reported inside ten LD

Three asteroids are reported passing inside ten lunar distances (LD) of Earth today. Risk-listed intruder 2012 VJ38 is outbound from 7.15 to 8.16 LD, 2012 VN76 is calculated with some uncertainty to be outbound from 7.5 to 8.0 LD, and risk-listed 2012 VU76 exits ten LD, traveling from 9.57 to 10.26 LD.

Coming to the neighborhood next, radar target 2010 JK1 arrives inside ten LD tomorrow, 2012 WH1 arrives on November 25th, and 2009 BS5 on December 7th.

This report was updated at 2322 UTC with the discovery of three objects caught after passing within ten LD: risk-listed 2012 WS3 (MPEC), 2012 WR3 (MPEC), and risk-listed 2012 WQ3 (MPEC). Today's first traffic report was generated at 1617 UTC with follow-up in today's DOU MPEC for 2012 WH1 and for departed 2012 VE77 and 2012 VV76.

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 21 November '12

The MPC's NEO Confirmation Page has 12 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve objects listed. Of these, four were "one nighters." So far The Tracking News has counted a total of seventeen 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 21 November '12

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.

MPEC 2012-W31 - "18:36 UT" - 2012 WS3

MPEC 2012-W30 - "18:33 UT" - 2012 WR3

MPEC 2012-W29 - "18:28 UT" - 2012 WQ3

MPEC 2012-W28 - "18:19 UT" - 2012 WP3

<< DOU on 21 Nov. '12 >>  MPEC 2012-W27 - "06:05 UT" - Daily Orbit Update

Observers  on 21 November '12

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2012-W27 & 2012-W28 -- 2012 WP3, 2012 VG6, 2012 VF37, 2012 VE77, 2012 VA5
B88Bigmuskie Obs. in Italy, 2 in MPEC 2012-W27 -- 2012 US136, 2005 SH19
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-W28 -- 2012 WP3
726Brainerd Obs. in Minnesota, 3 in MPEC 2012-W27 -- 333358, 138852, 5646
703Catalina Sky Survey (CSS) in Arizona, 18 in MPECs 2012-W27, 2012-W30 & 2012-W31 -- 2012 WS3, 2012 WR3, 2012 VP76, 2012 VF37, 2012 VE37, 2012 TJ146, 2012 QB17, 2008 XE2, 2003 SL215, 333358, 329338, 163364, 144411, 12538, 11284, 5646, 3360, 3199
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPECs 2012-W27, 2012-W28, 2012-W30 & 2012-W31 -- 2012 WS3, 2012 WR3, 2012 WP3, 2012 VG46, 2012 VE82, 2012 VD77, 2012 UA174, 2012 TW78, 2012 TT256, 2012 TO20, 2012 SK8, 2010 TS149, 2010 GZ6, 2009 SN98, 2006 DY, 2005 HC3, 313809, 252373, 232368
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-W28 -- 2012 WP3
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2012-W28 -- 2012 WP3
203GiaGa Obs. in Italy, 2 in MPECs 2012-W29 & 2012-W31 -- 2012 WS3, 2012 WQ3
J95Great Shefford Obs. in England, 1 in MPEC 2012-W28 -- 2012 WP3
C32Ka-Dar Obs. TAU Station in Russia, 1 in MPEC 2012-W28 -- 2012 WP3
168Kourovskaya Obs. in Russia, 3 in MPEC 2012-W27 -- 276397, 105140, 5587
704LINEAR in New Mexico, 10 in MPECs 2012-W27 & 2012-W28 -- 2012 WP3, 2012 WH1, 2006 WN1, 1998 VE31, 192563, 17182, 163364, 137052, 11284, 8034
B10Mas des Gres Obs., 1 in MPEC 2012-W28 -- 2012 WP3
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-W27 -- 2012 VZ36
B67Mirasteilas Obs. in Switzerland, 3 in MPECs 2012-W27, 2012-W29 & 2012-W31 -- 2012 WS3, 2012 WQ3, 2012 UX27
118Modra Obs. in Slovakia, 1 in MPEC 2012-W28 -- 2012 WP3
474Mt. John Obs. in New Zealand, 1 in MPEC 2012-W28 -- 2012 WP3
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2012-W27, 2012-W29 & 2012-W31 -- 2012 WS3, 2012 WQ3, 2012 TJ146, 2012 QY14, 10165, 3360
A24New Millennium Obs. in Italy, 1 in MPEC 2012-W30 -- 2012 WR3
0891program code 1 via Nikolaev Obs. in the Ukraine, 3 in MPEC 2012-W27 -- 4179, 3103, 2201
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2012-W27 -- 162004
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-W27 -- 2012 VZ25, 2012 VF37, 2012 TA79, 2012 SQ56, 2012 HJ1, 2006 VB14
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-W28 -- 2012 WP3
H36Sandlot Obs. in Kansas, 4 in MPECs 2012-W28, 2012-W29, 2012-W30 & 2012-W31 -- 2012 WS3, 2012 WR3, 2012 WQ3, 2012 WP3
204Schiaparelli Obs. in Italy, 2 in MPECs 2012-W30 & 2012-W31 -- 2012 WS3, 2012 WR3
033Schwarzschild Obs. in Germany, 1 in MPEC 2012-W28 -- 2012 WP3
291Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2012-W27 & 2012-W28 -- 2012 WP3, 2012 VV76, 2012 VH5, 2012 VF37, 2012 VF26, 2012 UW68, 2012 TR146, 2012 RP15, 2012 RL2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 21 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 WS3JPL Sentry22002033-21121313.3e-05-5.15-5.750JPL: "Analysis based on 29 observations spanning .93420 days (2012-Nov-20.32726 to 2012-Nov-21.26146)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2012 WQ3JPL Sentry20062036-206734.4e-06-4.91-5.190JPL: "Analysis based on 20 observations spanning .94138 days (2012-Nov-20.30163 to 2012-Nov-21.24301)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
2012 VE77JPL Sentry16162033-203529.0e-06-5.20-5.200JPL: "Analysis based on 30 observations spanning 2.9426 days (2012-Nov-14.17815 to 2012-Nov-17.120718)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
NEODyS16162033-203313.91e-05-4.57-4.570NEODyS: "Based on 32 optical observations (of which 4 are rejected as outliers) from 2012-11-14.178 to 2012-11-17.121."
2012 VV76JPL Sentry16162074-209427.7e-08-7.45-7.530JPL: "Analysis based on 37 observations spanning 7.0217 days (2012-Nov-13.43413 to 2012-Nov-20.45588)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
NEODyS16162094-209415.27e-08-7.64-7.640NEODyS: "Based on 37 optical observations (of which 0 are rejected as outliers) from 2012-11-13.435 to 2012-11-20.457."

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 21 November '12

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

2322Updated Traffic Report
2200Noted that JPL Sentry has posted 2012 WS3 as an impact risk - see above
2006Noted that JPL Sentry has posted 2012 WQ3 as an impact risk - see above
1934Grabbed MPEC 2012-W30 - 2012 WR3 - see above
Grabbed MPEC 2012-W31 - 2012 WS3 - see above
1833Grabbed MPEC 2012-W28 - 2012 WP3 - see above
Grabbed MPEC 2012-W29 - 2012 WQ3 - see above
1616Noted that JPL Sentry has updated its 2012 VE77 risk assessment - see above
Noted that NEODyS has updated its 2012 VE77 risk assessment - see above
Noted that JPL Sentry has updated its 2012 VV76 risk assessment - see above
Noted that NEODyS has updated its 2012 VV76 risk assessment - see above
Grabbed MPEC 2012-W27 - Daily Orbit Update - see above