Contents  on 9 January '10

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.

NEOCP Activity  on 9 January '10

The MPC's NEO Confirmation Page has 5 listings: 3 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 20 listings on the NEOCP at some point 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 9 January '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been ten MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-A48 - "18:42 UT" - Comet C/2010 A3 (Hill)


MPEC 2010-A47 - "17:43 UT" - 2010 AJ3


MPEC 2010-A46 - "17:40 UT" - 2010 AH3


MPEC 2010-A45 - "17:37 UT" - 2010 AG3


MPEC 2010-A44 - "17:34 UT" - 2010 AF3


MPEC 2010-A43 - "17:31 UT" - 2010 AE3


MPEC 2010-A42 - "17:28 UT" - 2010 AD3


MPEC 2010-A41 - "17:25 UT" - 2010 AC3


MPEC 2010-A40 - "17:22 UT" - 2010 AB3


<< DOU on 9 Jan. '10 >>  MPEC 2010-A39 - "07:11 UT" - Daily Orbit Update

Observers  on 9 January '10

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2010-A48 -- C/2010 A3
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 4 in MPEC 2010-A39 -- 2009 UW18, 2009 SW, 2000 EB107, 5324
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2010-A39 -- 2007 MK13
E18BDI Obs. in New South Wales, 1 in MPEC 2010-A39 -- 2009 UN3
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2010-A39, 2010-A43, 2010-A47 & 2010-A48 -- 2010 AJ3, 2010 AE3, C/2010 A3, 2009 XO
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2010-A48 -- C/2010 A3
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-A47 -- 2010 AJ3
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2010-A39 -- 2009 XR2, 2009 UV18, 2008 YZ32, 2006 UR, 2005 MC, 2004 XD50
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPECs 2010-A39, 2010-A40, 2010-A41, 2010-A42 & 2010-A43 -- 2010 AE3, 2010 AD3, 2010 AC3, 2010 AB3, 2009 XO
H01Magdalena Ridge Obs. (MRO) in New Mexico, 9 in MPECs 2010-A40, 2010-A41, 2010-A42, 2010-A43, 2010-A44, 2010-A45, 2010-A46, 2010-A47 & 2010-A48 -- 2010 AJ3, 2010 AH3, 2010 AG3, 2010 AF3, 2010 AE3, 2010 AD3, 2010 AC3, 2010 AB3, C/2010 A3
G96Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2010-A39, 2010-A40, 2010-A41, 2010-A42, 2010-A43, 2010-A44, 2010-A45, 2010-A46, 2010-A47 & 2010-A48 -- 2010 AJ3, 2010 AH3, 2010 AG3, 2010 AF3, 2010 AE3, 2010 AD3, 2010 AC3, 2010 AB3, C/2010 A3, 2009 XO, 2003 QH5, 2002 YN2, 22753, 5693
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-A48 -- C/2010 A3
J41Raheny Obs. in Ireland, 1 in MPEC 2010-A48 -- C/2010 A3
I20Rio Cuarto Obs. in Argentina, 6 in MPECs 2010-A39 & 2010-A48 -- 2010 AE, C/2010 A3, 2009 XR2, 2009 XO, 2009 XD, 138893
854Sabino Canyon Obs. in Arizona, 3 in MPECs 2010-A40, 2010-A43 & 2010-A48 -- 2010 AE3, 2010 AB3, C/2010 A3
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2010-A39 -- 2010 AL, 2010 AK, 2010 AE, 2009 RV1
673Table Mtn. Obs. in southern California, 1 in MPEC 2010-A48 -- C/2010 A3
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2010-A40 -- 2010 AB3
718Wiggins Obs. in Utah, 1 in MPEC 2010-A39 -- 2008 YZ32
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 January '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) risk pages.
0000NNN000

Object

Risk
Monitor
When
Noted
UTC
0000T0000
Year
Range

VI
#
000NN00
Prob
Cum
T0000
PS
Cum
T0000
PS
Max

T
S


Notes for Today's Latest Risk Assessments
2010 AD3JPL Sentry19002071-210227.2e-10-8.74-8.810JPL: "Analysis based on 24 observations spanning 1.0538 days (2010-Jan-08.21126 to 2010-Jan-09.26505)." Diameter approximately 0.058 km. from mean, weighted H=23.8.
2010 AKNEODyS15412029-205827.28e-11-6.84-6.910NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2010/01/06.312 to 2010/01/08.246."
JPL Sentry1541R E M O V E DJPL: Risk listing removed at 0952 UTC.
2009 XOJPL Sentry1541203814.0e-08-4.96-4.960JPL: "Analysis based on 186 observations spanning 30.422 days (2009-Dec-09.152 to 2010-Jan-08.574162)." Diameter approximately 0.270 km. from mean, weighted H=20.5.
NEODyS15412038-208121.09e-07-4.73-4.950NEODyS: "Based on 186 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/08.575."

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 January '10

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

2005Grabbed MPEC 2010-A48 - Comet C/2010 A3 (Hill) - see above
1900Noted that JPL Sentry has posted 2010 AD3 as an impact risk - see above
1747Grabbed MPEC 2010-A47 - 2010 AJ3 - see above
1744Grabbed MPEC 2010-A40 - 2010 AB3 - see above
Grabbed MPEC 2010-A41 - 2010 AC3 - see above
Grabbed MPEC 2010-A42 - 2010 AD3 - see above
Grabbed MPEC 2010-A43 - 2010 AE3 - see above
Grabbed MPEC 2010-A44 - 2010 AF3 - see above
Grabbed MPEC 2010-A45 - 2010 AG3 - see above
Grabbed MPEC 2010-A46 - 2010 AH3 - see above
1541Noted that JPL Sentry has updated its 2009 XO risk assessment - see above
Noted that NEODyS has updated its 2009 XO risk assessment - see above
Noted that JPL Sentry has removed 2010 AK as an impact risk - see above
Noted that NEODyS has updated its 2010 AK risk assessment - see above
Grabbed MPEC 2010-A39 - Daily Orbit Update - see above