Contents  on 4 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.

NEOCP Activity  on 4 January '09

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters."

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 4 January '09

Minor Planet Electronic Circulars

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


<< DOU on 4 Jan. '09 >>  MPEC 2009-A30 - "07:10 UT" - Daily Orbit Update

Observers  on 4 January '09

Sixteen observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 20 in MPEC 2009-A30 -- 2009 AU, 2009 AK, 2008 YZ28, 2008 YV32, 2008 YO27, 2008 YN27, 2008 YN2, 2008 YM27, 2008 YG3, 2008 YG26, 2008 YF29, 2008 XU2, 2008 WM32, 2008 WK32, 2008 WH60, 2008 WB59, 2008 SP7, 2008 SN1, 2008 RS26, 2008 QT3
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2009-A30 -- 2008 YK2, 2008 YG30
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2009-A30 -- 2008 YG26, 87684, 1863
B60Deep Sky Obs. in Germany, 2 in MPEC 2009-A30 -- 4544, 3360
448Desert Moon Obs. in New Mexico, 6 in MPEC 2009-A30 -- 2008 YS27, 2008 YE29, 2006 WQ1, 2002 AW11, 52768, 18882
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-A30 -- 141052
J95Great Shefford Obs. in England, 6 in MPEC 2009-A30 -- 2009 AT, 2009 AN, 2009 AM, 2008 YY32, 2008 YU30, 2008 YG30
A17Guidestar Obs. in Germany, 2 in MPEC 2009-A30 -- 2008 YN27, 2008 YF29
379Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2009-A30 -- 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SH82, 2008 EV5, 2005 BC, 2004 LV3
046Klet Obs. in the Czech Republic, 1 in MPEC 2009-A30 -- 2008 SQ1
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-A30 -- 2008 TZ3
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-A30 -- 144898
J52Pinsoro Obs. in Spain, 3 in MPEC 2009-A30 -- 2006 SZ217, 85774, 4179
H06\program code "\" (26) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-A30 -- 22099
587Sormano Obs. in Italy, 2 in MPEC 2009-A30 -- 2008 YG30, 2008 YF
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2009-A30 -- 2005 VO5, 2002 NW16, 88264, 162183, 153814, 8013
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 4 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 AVNEODyS14332010-2085753.16e-08-2.68-2.810NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2009/01/02.541 to 2009/01/03.539."
2008 YY32JPL Sentry1433R E M O V E DJPL: Risk listing removed at 1030 UTC.
2008 YV32JPL Sentry14332085-2107147.5e-06-6.09-6.690JPL: "Analysis based on 33 observations spanning 2.9281 days (2008-Dec-31.22029 to 2009-Jan-03.14842)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
NEODyS14332072-209062.12e-06-6.58-7.030NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2008/12/31.221 to 2009/01/03.149."
2008 YF29NEODyS1433209011.77e-07-6.65-6.650NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2008/12/30.250 to 2009/01/03.793."
JPL Sentry1433R E M O V E DJPL: Risk listing removed at 0950 UTC.
2008 XU2JPL Sentry1433203912.9e-07-6.65-6.650JPL: "Analysis based on 44 observations spanning 27.997 days (2008-Dec-06.2616 to 2009-Jan-03.258608)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS1433203913.01e-07-6.64-6.640NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/12/06.262 to 2009/01/03.259."
144898 2004 VD17NEODyS15322102-210425.64e-08-4.91-4.910NEODyS: "Based on 974 optical observations (of which 4 are rejected as outliers) from 2002/02/16.463 to 2009/01/03.407."

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 4 January '09

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

1532Noted that NEODyS has updated its 2004 VD17 risk assessment - see above
1433Noted that JPL Sentry has updated its 2008 XU2 risk assessment - see above
Noted that NEODyS has updated its 2008 XU2 risk assessment - see above
Noted that JPL Sentry has removed 2008 YF29 as an impact risk - see above
Noted that NEODyS has updated its 2008 YF29 risk assessment - see above
Noted that JPL Sentry has updated its 2008 YV32 risk assessment - see above
Noted that NEODyS has updated its 2008 YV32 risk assessment - see above
Noted that JPL Sentry has removed 2008 YY32 as an impact risk - see above
Noted that NEODyS has posted 2009 AV as an impact risk - see above
Grabbed MPEC 2009-A30 - Daily Orbit Update - see above