Contents  on 1 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 1 November '12

Five objects reported inside ten LD

Five objects are reported to be within ten lunar distances (LD) of Earth today. 2012 UX136 is inbound from 5.41 to 4.43 LD, 2012 UL171 from 7.9 to 7.7 LD*, and 2012 UV136 arrives inside, coming from 10.59 to 9.80 LD, while 2012 UU169 is outbound from 7.03 to 9.40 LD and 2012 UK171 from 8.92 to 9.64 LD

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

This report was generated at 1500 UTC with follow-up in today's DOU MPEC for 2012 UK171, 2012 UU169, 2012 UX136, 2012 UV136, and 2012 UY68.

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. "LD*" indicates some passage uncertainty. See also current sky chart and object details (alt-details), ephemerides, and today's timeline.

NEOCP Activity  on 1 November '12

The MPC's NEO Confirmation Page has 18 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had eighteen objects listed. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 26 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 1 November '12

Minor Planet Electronic Circulars

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

MPEC 2012-V02 - "20:26 UT" - 2012 ST9

<< DOU on 1 Nov. '12 >>  MPEC 2012-V01 - "06:06 UT" - Daily Orbit Update

Observers  on 1 November '12

Ten observers appear in today's MPECs.

CodeObserver / observatory
470Ceccano Obs. in Italy, 1 in MPEC 2012-V01 -- 2012 UU169
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 19 in MPEC 2012-V01 -- 2012 UY68, 2012 UX136, 2012 UV158, 2012 UV136, 2012 UB69, 2012 TS, 2012 TJ146, 2012 TH79, 2012 TA259, 2012 ST9, 2012 SD22, 2012 RF15, 2012 QJ45, 2012 LU7, 2012 HY1, 2012 GV17, 2006 DY, 2004 XN14, 4957
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2012-V01 -- 2012 UR158
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-V01 -- 2012 TB259, 207970, 159533
E100Tim Lister in southern California via Faulkes Telescope South in New South Wales, 1 in MPEC 2012-V01 -- 2012 UX136
168Kourovskaya Obs. in Russia, 15 in MPEC 2012-V01 -- 2012 LE11, 334412, 333889, 333358, 330825, 329520, 276397, 219071, 214869, 144411, 143649, 7350, 5646, 5587, 4487
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2012-V02 -- 2012 ST9
F51Pan-STARRS 1 (PS1) in Hawaii, 6 in MPEC 2012-V01 -- 2009 BD2, 2003 UC20, 1999 HA2, 322652, 137199, 5731
510Siegen Obs. in Germany, 2 in MPEC 2012-V01 -- 2012 UK171, 2012 QF49
954Teide Obs. in the Canary Islands, 1 in MPEC 2012-V01 -- 2012 UR158
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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 UU169NEODyS1457R E M O V E D-
2012 UR158JPL Sentry1532203311.7e-08-4.82-4.820JPL: "Analysis based on 75 observations spanning 8.4683 days (2012-Oct-22.4752 to 2012-Oct-30.94346)." Diameter approximately 0.250 km. from mean, weighted H=20.6.
2012 UY68JPL Sentry1532R E M O V E DJPL: Risk listing removed at 0953 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 1 November '12

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

2034Grabbed MPEC 2012-V02 - 2012 ST9 - see above
1532Noted that JPL Sentry has updated its 2012 UR158 risk assessment - see above
Noted that JPL Sentry has removed 2012 UY68 as an impact risk - see above
1500Generated Traffic Report
1457Noted that NEODyS has removed 2012 UU169 as an impact risk - see above
Grabbed MPEC 2012-V01 - Daily Orbit Update - see above