Contents  on 24 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 24 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 5.3 to 5.9 LD*, 2012 VN76 leaves ten LD, traveling from 9.27 to 10.28 LD, and radar target 2010 JK1 is inbound from 9.48 to 9.29 LD.

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

This report was generated at 1845 UTC with today's DOU MPEC which reports the recovery of 2012 VN76 on November 16th, extending its observing arc from 0.962 to 3.239 days, and first follow-up for departed 2012 WS3, 2012 WR3, and 2012 WQ3, as well as observations of 2012 WH1 and departed intruder 2012 VH77 plus departed 2012 VV76 and 2012 VB37.


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 24 November '12

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2323 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of fifteen 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 24 November '12

Minor Planet Electronic Circulars

As of last check at 2323 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 24 Nov. '12 >>  MPEC 2012-W43 - "06:07 UT" - Daily Orbit Update

Observers  on 24 November '12

Nineteen observers appear in today's MPEC.

CodeObserver / observatory
169Airali Obs. in Italy, 1 in MPEC 2012-W43 -- 6455
G53Alder Springs Obs. in northern California, 1 in MPEC 2012-W43 -- 2012 TO20
H21Astronomical Research Obs. Westfield in Illinois, 8 in MPEC 2012-W43 -- 2012 WS3, 2012 WR3, 2012 WP3, 2012 WH1, 2012 VF37, 2012 VD77, 2012 VB37, 2012 UA34
127Bornheim Obs. in Germany, 3 in MPEC 2012-W43 -- 2012 QF49, 2012 JS11, 333358
703Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2012-W43 -- 2012 WR3, 2012 TA79, 36284, 220839, 217430, 6569
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 12 in MPEC 2012-W43 -- 2012 WS10, 2012 VO76, 2012 VK76, 2012 VD77, 2012 VC5, 2012 UB34, 2012 QP17, 2012 PW, 2006 WQ29, 2003 LS3, 285540, 232368
448Desert Moon Obs. in New Mexico, 6 in MPEC 2012-W43 -- 2010 XT45, 2008 HV4, 2007 LV, 2006 WQ29, 276397, 162082
130Lumezzane Obs. in Italy, 8 in MPEC 2012-W43 -- 2012 QF49, 2012 JS11, 2009 SB15, 2005 SH19, 2005 JU1, 2002 TY68, 18882, 17182
G32MPC code G32, 1 in MPEC 2012-W43 -- 2012 TQ139
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-W43 -- 2012 VN76
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-W43 -- 2012 SB22
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-W43 -- 333358
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2012-W43 -- 2012 WK4
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-W43 -- 330825
B46Sintini Obs. in Italy, 1 in MPEC 2012-W43 -- 4179
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2012-W43 -- 2012 UZ33, 2012 TM139, 185853
291Spacewatch 1.8m telescope in Arizona, 21 in MPEC 2012-W43 -- 2012 WS3, 2012 WQ3, 2012 WG, 2012 VV76, 2012 VQ76, 2012 VM76, 2012 VL6, 2012 VK77, 2012 VJ6, 2012 VJ46, 2012 VH77, 2012 VG26, 2012 VF37, 2012 VF26, 2012 VE82, 2012 VD6, 2012 VC82, 2012 UT169, 2012 UD, 2012 TD53, 1999 UR
926Tenagra II Obs. in Arizona, 2 in MPEC 2012-W43 -- 2012 VZ25, 192563
718Wiggins Obs. in Utah, 1 in MPEC 2012-W43 -- 2012 WH1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 November '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2324 and JPL at 2323 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 WS10NEODyS16342059-2100115.58e-07-6.33-6.440NEODyS: "Based on 16 optical observations (of which 1 are rejected as outliers) from 2012-11-22.386 to 2012-11-23.291."
JPL Sentry1634R E M O V E DJPL: Risk listing removed at 1136 UTC.
2012 WR10NEODyS16342078-209331.65e-07-8.85-8.870NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2012-11-22.218 to 2012-11-23.297."
2012 WS3JPL Sentry16342065-2112531.0e-04-4.73-5.330JPL: "Analysis based on 36 observations spanning 2.9364 days (2012-Nov-20.32726 to 2012-Nov-23.26365)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
NEODyS16342082-2100182.51e-06-6.29-6.980NEODyS: "Based on 36 optical observations (of which 0 are rejected as outliers) from 2012-11-20.328 to 2012-11-23.264."
2012 WQ3JPL Sentry1634204011.1e-08-7.54-7.540JPL: "Analysis based on 26 observations spanning 3.9235 days (2012-Nov-20.30163 to 2012-Nov-24.22515)." Diameter approximately 0.028 km. from mean, weighted H=25.4.
NEODyS1634R E M O V E D-
2012 VV76JPL Sentry16342074-209422.8e-08-7.94-8.020JPL: "Analysis based on 42 observations spanning 10.103 days (2012-Nov-13.43413 to 2012-Nov-23.53749)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS1634R E M O V E D-

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 24 November '12

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

1845Generated Traffic Report
1634Noted that JPL Sentry has updated its 2012 VV76 risk assessment - see above
Noted that NEODyS has removed 2012 VV76 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 WQ3 risk assessment - see above
Noted that NEODyS has removed 2012 WQ3 as an impact risk - see above
Noted that NEODyS has posted 2012 WR10 as an impact risk - see above
Noted that JPL Sentry has removed 2012 WS10 as an impact risk - see above
Noted that NEODyS has posted 2012 WS10 as an impact risk - 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-W43 - Daily Orbit Update - see above