Contents  on 12 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 12 November '12

Six objects reported inside ten LD

Six asteroids are reported passing within ten lunar distances (LD) of our planet today. Inside Earth's Hill sphere, 2012 VC26 is headed out from 2.31 to 2.64 LD. Further away, risk-listed 2012 UY68 is inbound from 7.14 to 6.82 LD, and 2012 VQ6 is outbound from 4.75 to 7.52 LD, 2012 UV136 from 6.00 to 6.31 LD, and 2012 VA26 from 7.27 to 9.03 LD, while 2012 UX136 leaves ten LD, moving from 8.94 to 10.09 LD.

Coming toward Earth next, 2012 VB26 arrives inside ten LD on November 16th and radar target 2010 JK1 arrives on November 22nd.

This report was generated at 1609 UTC with follow-up in today's DOU MPEC for 2012 UV136.


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. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 12 November '12

The MPC's NEO Confirmation Page has 34 listings

When last checked at 2108 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 34 objects listed. Of these, 20 were "one nighters." So far The Tracking News has counted a total of 35 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 12 November '12

Minor Planet Electronic Circulars

As of last check at 2108 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 12 Nov. '12 >>  MPEC 2012-V71 - "06:05 UT" - Daily Orbit Update

Observers  on 12 November '12

Eight observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 4 in MPEC 2012-V71 -- 2012 UV136, 2012 UR158, 2012 TY79, 2012 TP274
300Bisei Spaceguard Center in Japan, 1 in MPEC 2012-V71 -- 2012 TA219
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2012-V71 -- 2008 XE2, 2008 HV4, 329338
A24New Millennium Obs. in Italy, 1 in MPEC 2012-V71 -- 3360
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-V71 -- 2012 OO
H36Sandlot Obs. in Kansas, 1 in MPEC 2012-V71 -- 2012 VY4
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2012-V71 -- 2012 TP274
I76Tesla Obs. in Spain, 2 in MPEC 2012-V71 -- 2012 US136, 2012 HJ1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 November '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2108 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
2009 VZ39JPL Sentry04052012-21107907.0e-06-6.14-6.900JPL: "Analysis based on 8 observations spanning .04342 days (2009-Nov-10.27204 to 2009-Nov-10.31546)." Diameter approximately 0.009 km. from mean, weighted H=27.9.

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 12 November '12

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

1609Generated Traffic Report
1607Grabbed MPEC 2012-V71 - Daily Orbit Update - see above
0405Noted that JPL Sentry has updated its 2009 VZ39 risk assessment - see above