Contents  on 25 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 25 November '12

Three objects reported inside ten LD

Three visitors are reported to be inside ten lunar distances (LD) of our planet today. Risk-listed 2012 WR10 is outbound from 5.94 to 6.58 LD, radar target 2010 JK1 comes its closest to Earth this time around, reaching 9.24 LD at 1615 UTC, and 2012 WH1 comes within, moving from 11.06 to 9.81 LD.

Next known to be approaching ten LD, 2009 BS5 arrives inside on December 7th.

This report was generated at 1939 UTC with today's DOU MPEC carrying the recovery of 2010 JK1 and first follow-up for 2012 WR10 as well as observations of 2012 WH1 and five departed objects: 2012 WS3, 2012 WR3, 2012 WQ3, 2012 WF, 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 25 November '12

The MPC's NEO Confirmation Page has 4 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four objects listed. Of these, three were "one nighters." So far The Tracking News has counted a total of ten 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 25 November '12

Minor Planet Electronic Circulars

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


MPEC 2012-W49 - "21:13 UT" - 2012 WC25


MPEC 2012-W48 - "21:11 UT" - 2012 WB25


MPEC 2012-W47 - "18:13 UT" - Comet P/2012 US27 (Siding Spring)


MPEC 2012-W46 - "16:53 UT" - 2010 XC15


MPEC 2012-W45 - "16:35 UT" - 2009 YO


<< DOU on 25 Nov. '12 >>  MPEC 2012-W44 - "06:08 UT" - Daily Orbit Update

Observers  on 25 November '12

A total of 20 observers appear in today's MPECs.

CodeObserver / observatory
E23Arcadia Obs. in New South Wales, 1 in MPEC 2012-W47 -- P/2012 US27
H21Astronomical Research Obs. Westfield in Illinois, 35 in MPECs 2012-W44, 2012-W45, 2012-W48 & 2012-W49 -- 2012 WS3, 2012 WS10, 2012 WR3, 2012 WR10, 2012 WQ3, 2012 WP3, 2012 WH, 2012 WF, 2012 WC25, 2012 WB25, 2012 VZ25, 2012 VP76, 2012 VO76, 2012 VM76, 2012 VK82, 2012 VK77, 2012 VJ77, 2012 VH46, 2012 VF82, 2012 VF37, 2012 VF26, 2012 UZ33, 2012 US136, 2012 TY79, 2012 TX284, 2012 TQ139, 2012 TD53, 2012 QR50, 2012 PS17, 2012 KU42, 2009 YO, 2008 VU4, 329614, 262623, 159533
703Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2012-W44 -- 2010 LR33, 2008 UL90, 68548, 66146, 33342, 162011, 141079, 5836, 1620, 887
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 15 in MPECs 2012-W44 & 2012-W47 -- 2012 WP3, 2012 WL4, P/2012 US27, 2012 TK123, 2012 SA22, 2009 SC15, 331769, 329614, 313809, 277127, 232368, 199145, 173561, 159635, 13553
821Cordoba Obs. Bosque Alegre Station in Argentina, 1 in MPEC 2012-W47 -- P/2012 US27
448Desert Moon Obs. in New Mexico, 8 in MPEC 2012-W44 -- 2012 VM82, 2012 VJ82, 2012 TA219, 2006 YT13, 2005 QX151, 68548, 285540, 277127
844Los Molinos Obs. in Uruguay, 2 in MPEC 2012-W44 -- 2012 WH1, 3360
C41MASTER-II Obs. Kislovodsk in Russia, 1 in MPEC 2012-W44 -- 154555
711McDonald Obs. in Texas, 1 in MPEC 2012-W49 -- 2012 WC25
474Mt. John Obs. in New Zealand, 1 in MPEC 2012-W47 -- P/2012 US27
G84Mt. Lemmon SkyCenter in Arizona, 4 in MPEC 2012-W44 -- 2012 WP3, 2012 VF37, 2012 TQ139, 68548
J43Oukaimeden Obs. in Morocco, 1 in MPEC 2012-W44 -- 8034
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2012-W44 -- 2012 US136, 2012 SQ56, 2012 HJ1, 2003 UC20
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-W48 -- 2012 WB25
E12Siding Spring Survey (SSS) in New South Wales, 20 in MPECs 2012-W44 & 2012-W47 -- P/2012 US27, 2012 PQ28, 2012 PG5, 2010 JK1, 2009 BD2, 2004 TL19, 2001 YM2, 1999 HA2, 88710, 87684, 68267, 343166, 335746, 333578, 285540, 159635, 136773, 4957, 2062, 1036
G68Sierra Stars Obs. in northern California, 1 in MPEC 2012-W44 -- 277127
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2012-W44, 2012-W48 & 2012-W49 -- 2012 WC25, 2012 WB25, 2012 TQ139
291Spacewatch 1.8m telescope in Arizona, 27 in MPECs 2012-W44, 2012-W46, 2012-W48 & 2012-W49 -- 2012 WS3, 2012 WS10, 2012 WG, 2012 WC25, 2012 WB25, 2012 VZ4, 2012 VY4, 2012 VV76, 2012 VN82, 2012 VL6, 2012 VK77, 2012 VJ82, 2012 VH6, 2012 VG26, 2012 VF5, 2012 VE46, 2012 VE37, 2012 VC82, 2012 VC6, 2012 VA5, 2012 TX284, 2010 XC15, 2010 SO16, 2010 LR33, 2010 JK1, 2001 QJ142, 2000 GD147
926Tenagra II Obs. in Arizona, 1 in MPEC 2012-W44 -- 2012 SA59
718Wiggins Obs. in Utah, 1 in MPEC 2012-W44 -- 2012 WH1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 WS10NEODyS1800R E M O V E D-
2012 WR10JPL Sentry18002083-209335.1e-07-8.34-8.620JPL: "Analysis based on 23 observations spanning 2.0432 days (2012-Nov-22.21759 to 2012-Nov-24.260794)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
NEODyS18002081-209942.25e-07-8.66-8.780NEODyS: "Based on 23 optical observations (of which 1 are rejected as outliers) from 2012-11-22.218 to 2012-11-24.262."
2012 WS3JPL Sentry18002065-2112568.4e-05-4.85-5.550JPL: "Analysis based on 42 observations spanning 3.9475 days (2012-Nov-20.32726 to 2012-Nov-24.27475)." Diameter approximately 0.022 km. from mean, weighted H=25.9.
NEODyS18002082-2100151.59e-06-6.50-6.970NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2012-11-20.328 to 2012-11-24.276."
2012 WQ3JPL Sentry1800204011.1e-08-7.58-7.580JPL: "Analysis based on 29 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.
2012 VV76JPL Sentry18002074-209423.8e-08-7.80-7.860JPL: "Analysis based on 44 observations spanning 11.027 days (2012-Nov-13.43413 to 2012-Nov-24.46094)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS18002094-209426.5e-08-7.58-7.830NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2012-11-13.435 to 2012-11-24.462."

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 25 November '12

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

2117Grabbed MPEC 2012-W48 - 2012 WB25 - see above
Grabbed MPEC 2012-W49 - 2012 WC25 - see above
1939Generated Traffic Report
1938Grabbed MPEC 2012-W47 - Comet P/2012 US27 (Siding Spring) - see above
1808Grabbed MPEC 2012-W44 - Daily Orbit Update - see above
1800Noted that JPL Sentry has updated its 2012 VV76 risk assessment - see above
Noted that NEODyS has reposted 2012 VV76 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 WQ3 risk assessment - see above
Noted 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 NEODyS has removed 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-W45 - 2009 YO - see above
Grabbed MPEC 2012-W46 - 2010 XC15 - see above