Contents  on 3 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 3 November '12

Three objects reported inside ten LD

Three asteroids are reported passing within ten lunar distances (LD) of our planet today. Within Earth's Hill sphere, 2012 UX136 come in from 3.57 to 2.95 LD. Further away, 2012 UL171 comes its closest to Earth this time around, reaching 7.6 LD at 0729 UTC (uncertainty: +/- 39 minutes) and 2012 UV136 is inbound from 9.04 to 8.33 LD.

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

This report was generated at 1620 UTC with follow-up in today's DOU MPEC for departed 2012 UK171 and new data for departed risk-listed 2012 UU158 from within its discovery arc.

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 3 November '12

The MPC's NEO Confirmation Page has 51 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 51 objects listed. Of these, 24 were "one nighters." So far The Tracking News has counted a total of 58 listings on the NEOCP today.

New MPECs  on 3 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 3 Nov. '12 >>  MPEC 2012-V04 - "06:02 UT" - Daily Orbit Update

Observers  on 3 November '12

Seventeen observers appear in today's MPEC.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2012-V04 -- 2012 UW27, 2012 US136, 2012 UK171, 2012 UC69, 2012 UA174, 2012 TQ78, 2012 TJ146, 2012 QQ50, 2012 QF49, 2012 QB17, 2012 LE11, 1999 VR6, 326777
I74Baxter Garden Obs. in England, 1 in MPEC 2012-V04 -- 162679
B88Bigmuskie Obs. in Italy, 2 in MPEC 2012-V04 -- 2012 US136, 2012 UK171
703Catalina Sky Survey (CSS) in Arizona, 4 in MPEC 2012-V04 -- 2012 LE11, 2001 UF18, 338292, 220839
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2012-V04 -- 2012 QE50, 2012 PW, 2007 PU11, 2003 UC5, 1998 XX2, 143487
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-V04 -- 2012 TS231, 2012 TQ78, 199145
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-V04 -- 2012 UR158
113Drebach Obs. in Germany, 2 in MPEC 2012-V04 -- 2012 US136, 276397
J95Great Shefford Obs. in England, 3 in MPEC 2012-V04 -- 2012 UR158, 2012 UR138, 2012 UK171
844Los Molinos Obs. in Uruguay, 4 in MPEC 2012-V04 -- 88710, 152667, 2062, 887
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPEC 2012-V04 -- 2012 UC34, 2012 UA174, 2012 TG53, 155340, 3288
C27Pallerols Obs. in Spain, 2 in MPEC 2012-V04 -- 137032, 6455
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-V04 -- 2012 TZ52, 2012 TX78, 2012 TS231
H23Pear Tree Obs. in Florida, 1 in MPEC 2012-V04 -- 2012 QF49
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-V04 -- 2012 QF49
204Schiaparelli Obs. in Italy, 1 in MPEC 2012-V04 -- 2012 UU158
291Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2012-V04 -- 2012 UU136, 2012 TY52, 2012 TV78, 2012 TP139, 2012 TF53, 2012 TD146, 2012 SW20
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 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 UU158JPL Sentry16152042-207864.5e-06-6.30-6.510JPL: "Analysis based on 9 observations spanning 1.8964 days (2012-Oct-23.50549 to 2012-Oct-25.40194)." Diameter approximately 0.013 km. from mean, weighted H=27.0.
NEODyS16152038-207863.79e-06-6.43-6.480NEODyS: "Based on 9 optical observations (of which 1 are rejected as outliers) from 2012-10-23.506 to 2012-10-25.403."
2012 UR158JPL Sentry1615R E M O V E DJPL: Risk listing removed at 0957 UTC.
2012 UR138JPL Sentry1615R 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 3 November '12

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

1620Generated Traffic Report
1615Noted that JPL Sentry has removed 2012 UR138 as an impact risk - see above
Noted that JPL Sentry has removed 2012 UR158 as an impact risk - see above
Noted that JPL Sentry has updated its 2012 UU158 risk assessment - see above
Noted that NEODyS has updated its 2012 UU158 risk assessment - see above
Grabbed MPEC 2012-V04 - Daily Orbit Update - see above