Contents  on 22 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 22 November '12

Three objects reported inside ten LD

There are three objects reported to be within ten lunar distances (LD) of Earth today. Lost 2012 VN76 may be outbound from 8.0 to 8.8 LD*, risk-listed intruder 2012 VJ38 is heading out from 8.16 to 9.18 LD, and radar target 2010 JK1 comes inside ten LD, moving from 10.29 to 9.82 LD.

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

This report was generated at 1820 UTC with today's DOU MPEC carrying a single astrometric position for risk-listed intruder 2012 VJ38, extending its observation arc from 0.98 to 4.38 days, as well as follow-up for 2012 WH1 and departed 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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 22 November '12

The MPC's NEO Confirmation Page has 21 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 21 objects listed. Of these, twelve were "one nighters." So far The Tracking News has counted a total of 23 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 '12

Minor Planet Electronic Circulars

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


MPEC 2012-W33 - "15:10 UT" - 2007 TR24


<< DOU on 22 Nov. '12 >>  MPEC 2012-W32 - "06:06 UT" - Daily Orbit Update

Observers  on 22 November '12

Ten observers appear in today's MPECs.

CodeObserver / observatory
I74Baxter Garden Obs. in England, 1 in MPEC 2012-W32 -- 162679
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2012-W32 -- 2008 SX7
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2012-W32 -- 2012 VC5, 2012 ST9, 2012 KL45, 313809, 232368, 159635, 6569
A77Chante-Perdrix Obs. in France, 1 in MPEC 2012-W32 -- 3360
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPECs 2012-W32 & 2012-W33 -- 2012 VJ38, 2007 TR24
A24New Millennium Obs. in Italy, 5 in MPEC 2012-W32 -- 2012 TA79, 2012 HJ1, 5646, 3838, 2212
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPEC 2012-W32 -- 2012 WH1, 2012 VZ25, 2012 VJ82, 2012 VF37, 2012 TA79, 2012 SQ56, 2012 SA59, 2012 QF49, 2008 XE2, 2006 VB14, 2003 UC20, 2001 YM2
204Schiaparelli Obs. in Italy, 6 in MPEC 2012-W32 -- 2012 VZ4, 2012 VC5, 2010 WB3, 2007 UQ13, 2005 WD, 1998 WL4
033Schwarzschild Obs. in Germany, 4 in MPEC 2012-W32 -- 2012 VV76, 2012 VO76, 2012 VJ82, 2012 VF37
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2012-W32 -- 2012 VY4, 2012 VN7, 2012 VL6, 2012 VF6, 2012 VF5, 2012 VE46, 2012 VC82, 2012 TP139
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 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.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2012 WS3NEODyS18182059-2100481.68e-05-5.40-5.860NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2012-11-20.328 to 2012-11-21.262."
2012 WQ3NEODyS18182036-208134.42e-06-4.96-4.990NEODyS: "Based on 20 optical observations (of which 1 are rejected as outliers) from 2012-11-20.302 to 2012-11-21.244."
2012 VV76JPL Sentry18182074-209431.2e-07-7.31-7.600JPL: "Analysis based on 39 observations spanning 7.0217 days (2012-Nov-13.43413 to 2012-Nov-20.45588)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS18182094-209421.16e-07-7.34-7.590NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2012-11-13.435 to 2012-11-20.457."
2012 VJ38JPL Sentry18182031-2111249.8e-05-5.77-6.000JPL: "Analysis based on 44 observations spanning 4.3819 days (2012-Nov-12.23058 to 2012-Nov-16.612447)." Diameter approximately 0.007 km. from mean, weighted H=28.5.
NEODyS18182073-209974.65e-05-6.32-6.350NEODyS: "Based on 44 optical observations (of which 1 are rejected as outliers) from 2012-11-12.231 to 2012-11-16.613."

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 '12

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

1820Generated Traffic Report
1818Noted that JPL Sentry has updated its 2012 VJ38 risk assessment - see above
Noted that NEODyS has updated its 2012 VJ38 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
Noted that NEODyS has posted 2012 WQ3 as an impact risk - see above
Noted that NEODyS has posted 2012 WS3 as an impact risk - see above
Grabbed MPEC 2012-W32 - Daily Orbit Update - see above
Grabbed MPEC 2012-W33 - 2007 TR24 - see above