Contents  on 5 January '12


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.

NEOCP Activity  on 5 January '12

The MPC's NEO Confirmation Page has 6 listings

When last checked at 2207 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six objects listed. So far The Tracking News has counted a total of fourteen 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 5 January '12

Minor Planet Electronic Circulars

As of last check at 2207 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2012-A35 - "21:16 UT" - Comet C/2012 A1 (Panstarrs)

MPEC 2012-A34 - "15:33 UT" - 2006 HV57

MPEC 2012-A33 - "12:15 UT" - 2012 AF3

MPEC 2012-A32 - "12:13 UT" - 2012 AE3

MPEC 2012-A31 - "12:11 UT" - 2012 AD3

MPEC 2012-A30 - "10:39 UT" - 1996 AE2

<< DOU on 5 Jan. '12 >>  MPEC 2012-A29 - "06:04 UT" - Daily Orbit Update

Observers  on 5 January '12

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2012-A31, 2012-A32, 2012-A33, 2012-A34 & 2012-A35 -- 2012 AF3, 2012 AE3, 2012 AD3, C/2012 A1, 2006 HV57
B75Betelgeuse Station in Italy, 1 in MPEC 2012-A29 -- 2011 YA
703Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2012-A29 -- 2011 SL102, 2010 CL19, 2003 AK18, 99799, 307493, 237805, 219071, 16816, 163696, 9400, 3554, 2368, 2061, 1866
807|Robert Holmes in Illinois via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2012-A30 -- 1996 AE2
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2012-A35 -- C/2012 A1
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2012-A30 -- 1996 AE2
C32Ka-Dar Obs. TAU Station in Russia, 2 in MPEC 2012-A29 -- 2011 YH40, 2010 CL19
704LINEAR in New Mexico, 2 in MPECs 2012-A29 & 2012-A30 -- 1996 AE2, 159857
I36Los Campitos Obs. in Argentina, 1 in MPEC 2012-A30 -- 1996 AE2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2012-A34 -- 2006 HV57
697McGraw-Hill Telescope in Arizona, 1 in MPEC 2012-A32 -- 2012 AE3
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2012-A29, 2012-A31, 2012-A32 & 2012-A33 -- 2012 AF3, 2012 AE3, 2012 AD3, 2006 NM, 285625, 162142, 138911
I89Nerpio Obs. in Italy, 1 in MPEC 2012-A35 -- C/2012 A1
I61Ourense Obs., 1 in MPEC 2012-A29 -- 1627
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2012-A35 -- C/2012 A1
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2012-A29 -- 2011 YH40
H36Sandlot Obs. in Kansas, 2 in MPECs 2012-A30 & 2012-A35 -- C/2012 A1, 1996 AE2
645Sloan Digital Sky Survey (SDSS) in New Mexico, 15 in MPEC 2012-A29 -- 2006 BX139, 2005 YY36, 2005 TR15, 2005 SX4, 2004 XM35, 2004 VB61, 2004 TU11, 2004 RS25, 2002 TN30, 2001 WL15, 2001 VJ75, 2001 FZ, 303174, 138155, 136770
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2012-A29 -- 2011 YH6, 2008 BS2, 19764, 175114, 2368
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2012-A29, 2012-A31, 2012-A32, 2012-A33 & 2012-A35 -- 2012 AF3, 2012 AE3, 2012 AD3, C/2012 A1, 2011 YS62, 2011 YQ10, 2011 YM63, 2011 YH28, 2011 YC29, 2011 XM1, 2011 WV95, 2011 WL2, 2011 SF25, 2010 FQ
G69Thousand Oaks Obs. in southern California, 1 in MPEC 2012-A29 -- 175706
I15Wishing Star Obs. in Rhode Island, 7 in MPEC 2012-A29 -- 2011 YW1, 2011 YG6, 2011 YA, 2011 SL102, 2008 WZ13, 2003 AK18, 1620
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 January '12

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2207 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
2011 YH28JPL Sentry1717207913.1e-07-4.14-4.140JPL: "Analysis based on 34 observations spanning 7.9701 days (2011-Dec-27.41812 to 2012-Jan-04.38819)." Diameter approximately 0.310 km. from mean, weighted H=20.2.
2011 WL2JPL Sentry1717209816.8e-07-4.36-4.360JPL: "Analysis based on 192 observations spanning 49.869 days (2011-Nov-16.31883 to 2012-Jan-05.18819)." Diameter approximately 0.240 km. from mean, weighted H=20.7.

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 5 January '12

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

2207Grabbed MPEC 2012-A35 - Comet C/2012 A1 (Panstarrs) - see above
1717Noted that JPL Sentry has updated its 2011 WL2 risk assessment - see above
Noted that JPL Sentry has updated its 2011 YH28 risk assessment - see above
Grabbed MPEC 2012-A29 - Daily Orbit Update - see above
Grabbed MPEC 2012-A30 - 1996 AE2 - see above
Grabbed MPEC 2012-A31 - 2012 AD3 - see above
Grabbed MPEC 2012-A32 - 2012 AE3 - see above
Grabbed MPEC 2012-A33 - 2012 AF3 - see above
Grabbed MPEC 2012-A34 - 2006 HV57 - see above