Contents  on 2 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 2 November '12

Five objects reported inside ten LD

There are five objects reported moving within ten lunar distances (LD) of Earth today. 2012 UX136 enters Earth's Hill sphere, coming from 4.43 to 3.57 LD. Further away, 2012 UL171 is inbound from 7.7 to 7.6 LD* and 2012 UV136 from 9.80 to 9.04 LD, while 2012 UU169 leaves ten LD, passing from 9.40 to 11.84 LD, as does 2012 UK171, which travels from 9.64 to 10.46 LD.

Up next, risk-listed 2012 UY68 arrives inside ten LD on November 7th and radar target 2010 JK1 arrives on November 22nd.

This report was generated at 1501 UTC with follow-up in today's DOU MPEC for 2012 UK171 and 2012 UY68.

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.

Radar Astrometry  on 2 November '12

Radar observation of two objects

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 1500 UTC when the database was dated 1 Nov.

Data update noted at 2302 UTC when the database was dated 2 Nov.

NEOCP Activity  on 2 November '12

The MPC's NEO Confirmation Page has 26 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 26 objects listed. Of these, fifteen were "one nighters."

New MPECs  on 2 November '12

Minor Planet Electronic Circulars

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

<< DOU on 2 Nov. '12 >>  MPEC 2012-V03 - "06:03 UT" - Daily Orbit Update

Observers  on 2 November '12

Ten observers appear in today's MPEC.

CodeObserver / observatory
251Arecibo in Puerto Rico, 2 in radar -- 2012 RV16, 136993
H21Astronomical Research Obs. Westfield in Illinois, 23 in MPEC 2012-V03 -- 2012 UX27, 2012 US9, 2012 UC69, 2012 TZ52, 2012 TS231, 2012 TQ78, 2012 TO231, 2012 TK123, 2012 TJ146, 2012 TG53, 2012 RX16, 2012 QQ50, 2012 QO10, 2012 QF49, 2012 JS11, 2012 JR17, 2012 GV17, 2007 TR65, 2004 TL19, 326291, 276397, 265962, 162900
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2012-V03 -- 2012 UY68, 2012 UV158, 2012 UB69, 2012 TF53, 2012 SG32, 2008 UL90, 2000 WL63
448Desert Moon Obs. in New Mexico, 4 in MPEC 2012-V03 -- 2012 UA34, 2012 TF53, 68548, 162004
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 2 in MPEC 2012-V03 -- 2012 US136, 2012 UA174
J95Great Shefford Obs. in England, 1 in MPEC 2012-V03 -- 2012 UK171
F51Pan-STARRS 1 (PS1) in Hawaii, 8 in MPEC 2012-V03 -- 2012 TX78, 2012 TK123, 2012 OE1, 2009 TB3, 326732, 192642, 6047, 4486
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-V03 -- 2012 US136, 2012 SA59, 2012 QF49, 2012 QB17, 2008 HV4, 12538
204Schiaparelli Obs. in Italy, 10 in MPEC 2012-V03 -- 2012 UV9, 2012 US9, 2012 UR18, 2012 TY79, 2012 TD53, 2012 TA79, 2009 SB15, 2008 XE2, 2003 UC20, 2001 UF18
J84South Obs. in England, 1 in MPEC 2012-V03 -- 2012 UK171
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 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.





Notes for Today's Latest Risk Assessments
2012 UY68JPL Sentry1500206915.6e-09-8.52-8.520JPL: "Analysis based on 29 observations spanning 11.976 days (2012-Oct-20.30946 to 2012-Nov-01.28501)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
NEODyS15002098-209811.28e-10-10.28-10.280NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2012-10-20.310 to 2012-11-01.286."

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 2 November '12

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

2302Noted Radar Astrometry database update - see above
1501Generated Traffic Report
1500Noted that JPL Sentry has reposted 2012 UY68 as an impact risk - see above
Noted that NEODyS has posted 2012 UY68 as an impact risk - see above
Grabbed MPEC 2012-V03 - Daily Orbit Update - see above
Noted Radar Astrometry database update - see above