Contents  on 14 January '09

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.

Radar Astrometry  on 14 January '09

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1958 UTC when the database was dated 14 Jan.

NEOCP Activity  on 14 January '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter."

New MPECs  on 14 January '09

Minor Planet Electronic Circulars

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


MPEC 2009-A69 - "16:24 UT" - Comet P/2008 Y1 (Boattini)


<< DOU on 14 Jan. '09 >>  MPEC 2009-A68 - "07:05 UT" - Daily Orbit Update

Observers  on 14 January '09

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
215Buchloe Obs. in Germany, 1 in MPEC 2009-A69 -- P/2008 Y1
151Eschenberg Obs. in Switzerland, 2 in MPEC 2009-A68 -- 2003 XB22, 1864
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 136849
J95Great Shefford Obs. in England, 1 in MPEC 2009-A68 -- 2000 YJ29
A17Guidestar Obs. in Germany, 2 in MPEC 2009-A68 -- 2009 AM, 2008 YG3
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPEC 2009-A68 -- 2009 AL, 2008 YU32
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-A68 -- 2008 RT26
A13Naef Obs. in Switzerland, 3 in MPEC 2009-A68 -- 2001 WT1, 154715, 141765
A32Panker Obs. in Germany, 1 in MPEC 2009-A68 -- 3554
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2009-A69 -- P/2008 Y1
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2009-A68 -- 2009 AM15, 2009 AK15, 2008 YA, 2008 EA32, 2004 XY60
587Sormano Obs. in Italy, 1 in MPEC 2009-A68 -- 203471
673Table Mtn. Obs. in southern California, 1 in MPEC 2009-A69 -- P/2008 Y1
H53Thompsonville Obs. in Illinois, 4 in MPEC 2009-A68 -- 162900, 4544, 1980, 1627
G56Walnut Creek Obs. in northern California, 1 in MPEC 2009-A68 -- 141052
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 January '09

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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2009 AM15NEODyS1410R E M O V E D-
2009 ALJPL Sentry23032049-210684.8e-07-4.81-5.080JPL #2 for the day: "Analysis based on 25 observations spanning 1.8705 days (2009-Jan-01.29931 to 2009-Jan-03.16982)." Diameter approximately 0.160 km. from mean, weighted H=21.6.
NEODyS14102057-209027.79e-07-4.43-4.430NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/14.169."
2008 YU32JPL Sentry23032013-2103574.2e-07-3.26-3.700JPL #2 for the day: "Analysis based on 19 observations spanning 3.0513 days (2008-Dec-31.10188 to 2009-Jan-03.15316)." Diameter approximately 0.373 km. from mean, weighted H=19.8.
NEODyS14102026-2085149.51e-07-3.00-3.310NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2008/12/31.103 to 2009/01/14.143."
2008 TS10JPL Sentry23032040-2103542.1e-05-6.88-7.580JPL: "Analysis based on 15 observations spanning 1.1091 days (2008-Oct-08.36174 to 2008-Oct-09.47079)." Diameter approximately 0.006 km. from mean, weighted H=28.7.

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 14 January '09

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

2303Noted that JPL Sentry has updated its 2008 TS10 risk assessment - see above
Noted that JPL Sentry has updated its 2008 YU32 risk assessment - see above
Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
1958Noted Radar Astrometry database update - see above
1700Grabbed MPEC 2009-A69 - Comet P/2008 Y1 (Boattini) - see above
1410Noted that JPL Sentry has updated its 2008 YU32 risk assessment - see above
Noted that NEODyS has updated its 2008 YU32 risk assessment - see above
Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
Noted that NEODyS has updated its 2009 AL risk assessment - see above
Noted that NEODyS has removed 2009 AM15 as an impact risk - see above
Grabbed MPEC 2009-A68 - Daily Orbit Update - see above