Contents  on 4 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 4 November '12

Three objects reported inside ten LD

There are three objects reported moving within ten lunar distances (LD) of Earth today. Inside Earth's Hill sphere, 2012 UX136 comes its closest to Earth this passage, reaching 2.74 LD at 2152 UTC. More distant, 2012 UL171 is outbound from 7.7 to 7.8 LD* and 2012 UV136 is inbound from 8.33 to 7.68 LD.

Coming to the neighborhood 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 1556 UTC with follow-up in today's DOU MPEC for 2012 UV136 and 2012 UY68 plus departed 2012 UK171.

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 4 November '12

The MPC's NEO Confirmation Page has 54 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 54 objects listed. Of these, 33 were "one nighters." So far The Tracking News has counted a total of 96 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 4 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 4 Nov. '12 >>  MPEC 2012-V05 - "06:03 UT" - Daily Orbit Update

Observers  on 4 November '12

Sixteen observers appear in today's MPEC.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 2 in MPEC 2012-V05 -- 2012 UK171, 2012 QF49
H21Astronomical Research Obs. Westfield in Illinois, 14 in MPEC 2012-V05 -- 2012 UW27, 2012 UV136, 2012 US9, 2012 US136, 2012 UR158, 2012 UD34, 2012 TY79, 2012 TV78, 2012 TS231, 2012 TQ139, 2012 TP274, 2012 TA79, 96536, 199145
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2012-V05 -- 2012 UC69, 2012 JS11, 2008 XE2, 199145, 4947
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 11 in MPEC 2012-V05 -- 2012 UU136, 2012 RL15, 2012 PQ28, 2012 KK18, 2012 HO15, 2012 HG31, 2011 SB16, 2008 TZ3, 2007 PU11, 249886, 159533
G48Doc Greiner Research Obs. Rancho Hildalgo in New Mexico, 1 in MPEC 2012-V05 -- 329338
C18Frasnes-Lez-Anvaing Obs. in Belgium, 1 in MPEC 2012-V05 -- 2012 QF49
D95Kurihara Obs. in Japan, 1 in MPEC 2012-V05 -- 144411
704LINEAR in New Mexico, 4 in MPEC 2012-V05 -- 2009 BD2, 334412, 152667, 5751
C41MASTER-II Obs. Kislovodsk in Russia, 2 in MPEC 2012-V05 -- 137032, 6047
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2012-V05 -- 2012 SD22, 2012 GK
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2012-V05 -- 2012 TS231, 12711, 10115
A24New Millennium Obs. in Italy, 18 in MPEC 2012-V05 -- 2012 SA59, 2012 QF49, 2012 QB17, 2012 JS11, 2009 SB15, 2008 XE2, 99907, 338292, 338176, 330825, 277127, 219071, 162911, 105140, 5646, 4947, 3200, 2212
F51Pan-STARRS 1 (PS1) in Hawaii, 29 in MPEC 2012-V05 -- 2012 UW68, 2012 TM139, 2012 TK79, 2012 TD146, 2011 KD11, 2008 XE2, 2008 SS251, 2007 LV8, 2006 WN1, 2003 QA31, 2001 UF18, 52762, 34613, 341050, 29075, 255071, 192642, 190119, 17182, 162011, 153306, 144411, 141874, 139047, 8034, 3288, 3200, 1916, 887
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2012-V05 -- 2012 UK171, 2012 QF49, 2012 QB17, 2008 HV4, 341050, 338176
291Spacewatch 1.8m telescope in Arizona, 12 in MPEC 2012-V05 -- 2012 UY68, 2012 UX68, 2012 UW68, 2012 UR136, 2012 UE34, 2012 UC34, 2012 TV231, 2012 TT256, 2012 TS78, 2012 TR146, 2012 TO20, 2012 QQ10
718Wiggins Obs. in Utah, 1 in MPEC 2012-V05 -- 2012 UK171
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 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 Sentry1552206914.5e-09-8.61-8.610JPL: "Analysis based on 32 observations spanning 13.976 days (2012-Oct-20.30946 to 2012-Nov-03.28533)." Diameter approximately 0.034 km. from mean, weighted H=25.0.
2012 UE34JPL Sentry15522090-2111222.3e-07-6.17-6.610JPL: "Analysis based on 25 observations spanning 15.860 days (2012-Oct-18.393522 to 2012-Nov-03.25305)." Diameter approximately 0.079 km. from mean, weighted H=23.2.
NEODyS15522098-209811.29e-10-9.43-9.430NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2012-10-18.394 to 2012-11-03.254."

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 4 November '12

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

1556Generated Traffic Report
1552Noted that JPL Sentry has updated its 2012 UE34 risk assessment - see above
Noted that NEODyS has updated its 2012 UE34 risk assessment - see above
Noted that JPL Sentry has updated its 2012 UY68 risk assessment - see above
Grabbed MPEC 2012-V05 - Daily Orbit Update - see above