Contents  on 8 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 8 January '10

The MPC's NEO Confirmation Page has 15 listings: 4 new, 11 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and eleven updated listings. Of these, thirteen were "one nighters." So far The Tracking News has counted a total of 22 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 8 January '10

Minor Planet Electronic Circulars

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


MPEC 2010-A38 - "17:56 UT" - 2010 AO2


MPEC 2010-A37 - "17:54 UT" - 2010 AN2


MPEC 2010-A36 - "17:50 UT" - 2010 AM2


MPEC 2010-A35 - "17:45 UT" - 2010 AL2


MPEC 2010-A34 - "17:41 UT" - 2010 AK2


<< DOU on 8 Jan. '10 >>  MPEC 2010-A33 - "07:10 UT" - Daily Orbit Update

Observers  on 8 January '10

Eleven observing facilities appear in today's MPECs.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2010-A33 -- 2006 AO4, 137925
J95Great Shefford Obs. in England, 1 in MPEC 2010-A34 -- 2010 AK2
379Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2010-A33 -- 2009 XR2, 2008 YZ32, 2007 MK13, 2006 UR, 2005 MC, 2004 XD50, 5626
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPECs 2010-A34, 2010-A35, 2010-A36, 2010-A37 & 2010-A38 -- 2010 AO2, 2010 AN2, 2010 AM2, 2010 AL2, 2010 AK2
704LINEAR in New Mexico, 9 in MPECs 2010-A33 & 2010-A35 -- 2010 AL2, 2009 XC2, 2009 NA, 2008 YZ32, 2006 AO4, 85839, 68216, 137805, 3200
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2010-A33, 2010-A34, 2010-A36, 2010-A37 & 2010-A38 -- 2010 AO2, 2010 AN2, 2010 AM2, 2010 AK2, 2010 AF
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2010-A34, 2010-A35, 2010-A36, 2010-A37 & 2010-A38 -- 2010 AO2, 2010 AN2, 2010 AM2, 2010 AL2, 2010 AK2
I20Rio Cuarto Obs. in Argentina, 3 in MPEC 2010-A33 -- 2009 UN3, 2002 PP6, 85818
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-A35 -- 2010 AL2
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2010-A33 -- 2009 WK6, 2009 FF19, 228587
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2010-A33, 2010-A34, 2010-A36, 2010-A37 & 2010-A38 -- 2010 AR1, 2010 AO2, 2010 AN2, 2010 AM2, 2010 AK2, 2010 AJ, 2009 XO, 2009 SV17
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 January '10

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. 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 AR1JPL Sentry15222041-2108131.5e-08-8.53-8.990JPL: "Analysis based on 17 observations spanning .99057 days (2010-Jan-07.27712 to 2010-Jan-08.26769)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
NEODyS15222049-2089136.51e-09-8.74-9.090NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2010/01/07.278 to 2010/01/08.268."
2010 AKNEODyS15222011-20901871.78e-07-3.70-4.370NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2010/01/06.312 to 2010/01/07.275."
2010 AJJPL Sentry15222036-2101132.7e-08-5.37-5.910JPL: "Analysis based on 25 observations spanning 1.9919 days (2010-Jan-06.28873 to 2010-Jan-08.28065)." Diameter approximately 0.340 km. from mean, weighted H=20.0.
NEODyS1522204111.43e-09-6.50-6.500NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2010/01/06.289 to 2010/01/08.281."
2009 XOJPL Sentry1522203811.2e-07-4.43-4.430JPL: "Analysis based on 157 observations spanning 29.334 days (2009-Dec-09.152 to 2010-Jan-07.48616)." Diameter approximately 0.290 km. from mean, weighted H=20.3.
NEODyS15222038-208631.96e-07-4.32-4.420NEODyS: "Based on 157 optical observations (of which 0 are rejected as outliers) from 2009/12/09.153 to 2010/01/07.487."

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 8 January '10

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

1822Grabbed MPEC 2010-A34 - 2010 AK2 - see above
Grabbed MPEC 2010-A35 - 2010 AL2 - see above
Grabbed MPEC 2010-A36 - 2010 AM2 - see above
Grabbed MPEC 2010-A37 - 2010 AN2 - see above
Grabbed MPEC 2010-A38 - 2010 AO2 - see above
1522Noted 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 updated its 2010 AJ risk assessment - see above
Noted that NEODyS has posted 2010 AJ as an impact risk - see above
Noted that NEODyS has posted 2010 AK as an impact risk - see above
Noted that JPL Sentry has updated its 2010 AR1 risk assessment - see above
Noted that NEODyS has posted 2010 AR1 as an impact risk - see above
Grabbed MPEC 2010-A33 - Daily Orbit Update - see above