Contents  on 9 December '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 9 December '12

One object reported inside ten LD

One asteroid is reported moving inside ten lunar distances (LD) of Earth today. 2009 BS5 is calculated with some uncertainty to be inbound from 9.1 to 8.7 LD.

Approaching next, risk-listed 2012 XM16 arrives inside ten LD on December 13th.

This report was generated at 1732 UTC with follow-up in today's DOU MPEC for departed 2012 XP2 and observation of risk-listed 2012 VV76 from mid-November.

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

NEOCP Activity  on 9 December '12

The MPC's NEO Confirmation Page has 38 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 38 objects listed. Of these, eighteen were "one nighters." So far The Tracking News has counted a total of 48 listings on the NEOCP today.

New MPECs  on 9 December '12

Minor Planet Electronic Circulars

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

MPEC 2012-X37 - "22:11 UT" - 2012 XE54

MPEC 2012-X36 - "13:02 UT" - 2008 YZ28

<< DOU on 9 Dec. '12 >>  MPEC 2012-X35 - "06:03 UT" - Daily Orbit Update

Observers  on 9 December '12

A total of 29 observers appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2012-X37 -- 2012 XE54
C77Bernezzo Obs. in Italy, 2 in MPECs 2012-X35 & 2012-X37 -- 2012 XE54, 4179
C12Berta Obs. in Spain, 1 in MPEC 2012-X37 -- 2012 XE54
B88Bigmuskie Obs. in Italy, 1 in MPEC 2012-X35 -- 2012 VJ82
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2012-X35, 2012-X36 & 2012-X37 -- 2012 XE54, 2009 BD2, 2008 YZ28, 2004 XN14, 2000 WL63, 96189, 338049, 285110, 25143, 162421, 112985, 5587, 5131, 3554
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2012-X35 -- 2012 XP2, 2012 XN2, 2012 VZ36, 2012 UW27, 2009 YG, 2006 KZ37, 198752
958Dax Obs. in France, 1 in MPEC 2012-X36 -- 2008 YZ28
448Desert Moon Obs. in New Mexico, 3 in MPEC 2012-X35 -- 2012 VF37, 2009 XF2, 331963
G48Doc Greiner Research Obs. Rancho Hildalgo (DGRO-RH) in New Mexico, 3 in MPEC 2012-X35 -- 2012 XK16, 2012 XG16, 162082
C18Frasnes-Lez-Anvaing Obs. in Belgium, 1 in MPEC 2012-X35 -- 345705
203GiaGa Obs. in Italy, 2 in MPECs 2012-X35 & 2012-X36 -- 2012 XZ6, 2008 YZ28
J95Great Shefford Obs. in England, 1 in MPEC 2012-X35 -- 2005 VE7
704LINEAR in New Mexico, 9 in MPECs 2012-X35 & 2012-X36 -- 2012 XK16, 2012 VE37, 2008 YZ28, 2007 YX1, 2005 SH19, 138852, 137805, 10115, 3200
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-X35 -- 2012 VV76
C91Montevenere Obs., 1 in MPEC 2012-X35 -- 17182
900Moriyama Obs. in Japan, 1 in MPEC 2012-X37 -- 2012 XE54
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2012-X35 -- 25143, 153220, 8034, 5645
A24New Millennium Obs. in Italy, 2 in MPECs 2012-X36 & 2012-X37 -- 2012 XE54, 2008 YZ28
C47Nonndorf Obs. in Austria, 1 in MPEC 2012-X36 -- 2008 YZ28
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPEC 2012-X35 -- 2012 XP2, 2010 XT45, 2010 WT
B49Paus Obs. in Spain, 1 in MPEC 2012-X35 -- 2012 XZ6
461SZTE Asteroid Program in Hungary, 1 in MPEC 2012-X37 -- 2012 XE54
204Schiaparelli Obs. in Italy, 2 in MPECs 2012-X35 & 2012-X36 -- 2008 YZ28, 99942
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2012-X35 -- 2011 DL19, 2007 SV11, 2007 BM8, 306383
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2012-X35 -- 2012 XY6, 2012 WE33, 2012 WC25, 2011 YX10, 2011 CS4, 2011 BK24, 2010 WT, 2009 OP9, 2005 RN33, 2004 BV1
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2012-X36 -- 2008 YZ28
926Tenagra II Obs. in Arizona, 2 in MPEC 2012-X35 -- 17188, 2212
I76Tesla Obs. in Spain, 2 in MPEC 2012-X35 -- 2012 WP3, 2012 VF37
J08Zonalunar Obs. in Spain, 1 in MPEC 2012-X37 -- 2012 XE54
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 December '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 VV76JPL Sentry1724209421.4e-08-8.25-8.500JPL: "Analysis based on 46 observations spanning 13.180 days (2012-Nov-13.43413 to 2012-Nov-26.614374)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS1724R E M O V E D-

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 9 December '12

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

2249Grabbed MPEC 2012-X37 - 2012 XE54 - see above
1732Generated Traffic Report
1724Noted that JPL Sentry has updated its 2012 VV76 risk assessment - see above
Noted that NEODyS has removed 2012 VV76 as an impact risk - see above
Grabbed MPEC 2012-X35 - Daily Orbit Update - see above
Grabbed MPEC 2012-X36 - 2008 YZ28 - see above