Contents  on 20 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 20 November '12

Seven objects reported inside ten LD

Seven visitors are reported traveling within ten lunar distances (LD) of our planet today. 2012 VN76 may or may not be coming its closest to Earth on this passage, reaching perhaps 7.3 LD at around 0033 UTC (uncertainty: +/- 2.4500 hours, not reported observed since its discovery announcement). Risk-listed intruder 2012 VJ38 is outbound from 6.13 to 7.15 LD and risk-listed 2012 VU76 from 8.99 to 9.57 LD. And four objects exit from being inside ten LD: risk-listed 2012 VE77 travels from 8.08 to 11.05 LD, risk-listed 2012 VS76 from 8.84 to 11.31 LD, 2012 UY68 from 9.85 to 10.78 LD, and 2012 VC26 9.90 to 11.07 LD.

On approach next, radar target 2010 JK1 arrives inside ten LD on November 22nd and newly announced 2012 WH1 arrives on November 25th.

This report was generated at 1921 UTC with new discovery 2012 WH1 (MPEC) and today's DOU MPEC with first follow-up for departed 2012 WF and observation of 2012 VU76 plus five departed objects: intruder 2012 VH77, 2012 VV76, 2012 VB37, 2012 VB20, and 2012 UK171.


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 20 November '12

The MPC's NEO Confirmation Page has 17 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 20 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 20 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-W26 - "20:30 UT" - 2011 JW31


MPEC 2012-W25 - "20:24 UT" - 2011 HZ102


MPEC 2012-W24 - "16:34 UT" - 2012 WH1


MPEC 2012-W23 - "16:27 UT" - 2012 VL94


<< DOU on 20 Nov. '12 >>  MPEC 2012-W22 - "06:06 UT" - Daily Orbit Update

Observers  on 20 November '12

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

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPECs 2012-W22 & 2012-W23 -- 2012 WF, 2012 VZ25, 2012 VV76, 2012 VU76, 2012 VP76, 2012 VO76, 2012 VM82, 2012 VL94, 2012 VK82, 2012 VK5, 2012 VH77, 2012 VG77, 2012 VG6, 2012 VG26, 2012 VF82, 2012 VF46, 2012 VE82, 2012 VD77, 2012 VB20, 2012 UK171, 2012 TY79, 2012 TO231, 2012 TA219
C77Bernezzo Obs. in Italy, 1 in MPEC 2012-W22 -- 2012 QF49
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2012-W22 & 2012-W23 -- 2012 VL94, 277830
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2012-W22 -- 2012 VH6, 2012 TQ256, 2012 QJ45, 310560, 159635, 153219, 4957
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2012-W23 -- 2012 VL94
C73Galati Obs. in Romania, 1 in MPEC 2012-W22 -- 152942
D00ISON-Kislovodsk Obs., 2 in MPEC 2012-W22 -- 329275, 162004
704LINEAR in New Mexico, 9 in MPECs 2012-W22 & 2012-W24 -- 2012 WH1, 2008 XE2, 2005 UC, 1998 VE31, 276397, 162911, 153306, 137032, 5731
B10Mas des Gres Obs., 2 in MPEC 2012-W22 -- 2007 BG29, 330825
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-W22 -- 2012 VL6, 2012 VE46
118Modra Obs. in Slovakia, 1 in MPEC 2012-W23 -- 2012 VL94
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-W22 -- 155334
2691program code 1 via New Horizons KBO Search, Magellan Baade Telescope (NHKS-MBT) in Chile, 2 in MPECs 2012-W25 & 2012-W26 -- 2011 JW31, 2011 HZ102
2692program code 2 via New Horizons KBO Search, Magellan Baade Telescope (NHKS-MBT) in Chile, 2 in MPECs 2012-W25 & 2012-W26 -- 2011 JW31, 2011 HZ102
2681program code 1 via New Horizons KBO Search, Magellan Clay Telescope (NHKS-MCT) in Chile, 2 in MPECs 2012-W25 & 2012-W26 -- 2011 JW31, 2011 HZ102
2682program code 2 via New Horizons KBO Search, Magellan Clay Telescope (NHKS-MCT) in Chile, 2 in MPECs 2012-W25 & 2012-W26 -- 2011 JW31, 2011 HZ102
2661program code 1 via New Horizons KBO Search, Subaru Telescope in Hawaii, 1 in MPEC 2012-W25 -- 2011 HZ102
E09Oakley Southern Sky Obs. in New South Wales, 1 in MPEC 2012-W22 -- 24475
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2012-W24 -- 2012 WH1
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-W23 & 2012-W24 -- 2012 WH1, 2012 VL94
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2012-W22 -- 2012 TA79
291Spacewatch 1.8m telescope in Arizona, 18 in MPEC 2012-W22 -- 2012 VZ4, 2012 VZ25, 2012 VV76, 2012 VO76, 2012 VO6, 2012 VN6, 2012 VJ46, 2012 VH5, 2012 VG6, 2012 VF77, 2012 VF26, 2012 VE82, 2012 VB37, 2012 UX68, 2012 UQ18, 2012 UD34, 2012 RP15, 2012 RO1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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 VE82JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1031 UTC.
2012 VV76JPL Sentry1800207418.9e-09-8.28-8.280JPL: "Analysis based on 34 observations spanning 6.0434 days (2012-Nov-13.43413 to 2012-Nov-19.47752)." Diameter approximately 0.027 km. from mean, weighted H=25.5.
NEODyS18002094-209416.67e-08-7.53-7.530NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2012-11-13.435 to 2012-11-19.478."
2012 VU76JPL Sentry18002074-210927.2e-06-5.92-5.930JPL: "Analysis based on 40 observations spanning 5.0298 days (2012-Nov-13.43639 to 2012-Nov-18.466226)." Diameter approximately 0.025 km. from mean, weighted H=25.6.
NEODyS18002095-210022.2e-08-8.38-8.50NEODyS: "Based on 40 optical observations (of which 0 are rejected as outliers) from 2012-11-13.437 to 2012-11-18.467."
2012 VO76JPL Sentry1800R E M O V E DJPL: Risk listing removed at 0951 UTC.

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 20 November '12

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

2100Grabbed MPEC 2012-W25 - 2011 HZ102 - see above
Grabbed MPEC 2012-W26 - 2011 JW31 - see above
1921Generated Traffic Report
1800Noted that JPL Sentry has removed 2012 VE82 as an impact risk - see above
Noted that JPL Sentry has removed 2012 VO76 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 VU76 risk assessment - see above
Noted that NEODyS has updated its 2012 VU76 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-W22 - Daily Orbit Update - see above
Grabbed MPEC 2012-W23 - 2012 VL94 - see above
Grabbed MPEC 2012-W24 - 2012 WH1 - see above