Contents  on 9 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 9 November '12

Eleven objects reported inside ten LD

Eleven asteroids are reported passing within ten lunar distances (LD) of our planet today. Two of them are entering Earth's Hill sphere. 2012 VQ6 comes in from 4.66 to 2.26 LD and 2012 VC26 from 4.19 to 3.26 LD.

Out further, 2012 VB5 comes its closest to Earth on this passage, reaching 4.65 LD at 1105 UTC, as does 2012 VA26, coming to 5.12 LD at 1728 UTC. 2012 UV136 is inbound from 5.92 to 5.80 LD and risk-listed 2012 UY68 from 9.02 to 8.27 LD. And five are outbound. 2012 VE26 travels from 4.38 to 8.47 LD, 2012 UX136 from 5.61 to 6.68 LD, 2012 VD5 from 6.72 to 9.23 LD, 2012 UL171 from 9.0 to 9.5 LD*, and 2012 VL5 leaves ten LD, passing from 9.58 to 10.71 LD.

Approaching our neighborhood next, 2012 VB26 arrives inside ten LD on November 16th and radar target 2010 JK1 arrives on November 22nd.

This report was generated at 1636 UTC with follow-up in today's DOU MPEC for 2012 VQ6 and 2012 UY68 plus the recovery of departed risk-listed 2012 UU158, adding 12 days to an observing arc of less than two days.

Notes: Ten times the distance to the Moon (ten LD) has no astronomical significance but is a useful reporting boundary. Earth's Hill sphere (of gravitational influence) is estimated to extend out to around 3.89 LD. 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 9 November '12

The MPC's NEO Confirmation Page has 36 listings

When last checked at 2341 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 36 objects listed. Of these, 20 were "one nighters."

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 9 November '12

Minor Planet Electronic Circulars

As of last check at 2341 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 9 Nov. '12 >>  MPEC 2012-V59 - "06:05 UT" - Daily Orbit Update

Observers  on 9 November '12

Ten observers appear in today's MPEC.

CodeObserver / observatory
703Catalina Sky Survey in Arizona, 1 in MPEC 2012-V59 -- 1620
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPEC 2012-V59 -- 2012 VZ4, 2012 VH6, 2012 VF5, 2012 TH79, 331509, 310560, 192563, 138925
704LINEAR in New Mexico, 3 in MPEC 2012-V59 -- 2005 WD, 333358, 330825
5682David Tholen's team on Mauna Kea in Hawaii, 4 in MPEC 2012-V59 -- 2012 UY68, 2012 UU158, 2012 UR158, 2012 TF79
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2012-V59 -- 2012 US9
A24New Millennium Obs. in Italy, 9 in MPEC 2012-V59 -- 2012 SA59, 2004 UB, 2002 TY68, 333358, 330825, 163364, 162679, 136993, 5646
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2012-V59 -- 2010 XT45, 2005 UC, 2005 QX151, 338176, 17188, 141079, 8034, 2212
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2012-V59 -- 2012 US136, 2002 TR190
C63Piazzi Obs., 2 in MPEC 2012-V59 -- 2012 KK18, 2002 TY68
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2012-V59 -- 2012 VQ6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 November '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2343 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 VQ6NEODyS1630R E M O V E D-
2012 UU158JPL Sentry16302042-207044.4e-06-6.28-6.380JPL: "Analysis based on 11 observations spanning 13.951 days (2012-Oct-23.50549 to 2012-Nov-06.456322)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
NEODyS16302041-207863.39e-06-6.43-6.490NEODyS: "Based on 11 optical observations (of which 1 are rejected as outliers) from 2012-10-23.506 to 2012-11-06.457."
2012 UY68JPL Sentry1630211211.1e-10-10.43-10.40JPL: "Analysis based on 39 observations spanning 17.932 days (2012-Oct-20.30946 to 2012-Nov-07.24123)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
NEODyS16302081-208118.55e-10-9.38-9.380NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2012-10-20.310 to 2012-11-07.242."

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 9 November '12

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

1636Generated Traffic Report
1630Noted that JPL Sentry has updated its 2012 UU158 risk assessment - see above
Noted that NEODyS has updated its 2012 UU158 risk assessment - see above
Noted that JPL Sentry has updated its 2012 UY68 risk assessment - see above
Noted that NEODyS has updated its 2012 UY68 risk assessment - see above
Noted that NEODyS has removed 2012 VQ6 as an impact risk - see above
Grabbed MPEC 2012-V59 - Daily Orbit Update - see above