Contents  on 1 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 1 January '09

The MPC's NEO Confirmation Page has 23 listings: 12 new, 11 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had twelve new and eleven updated listings. Of these, sixteen were "one nighters." So far The Tracking News has counted a total of 25 objects listed on the NEOCP at some point today.

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 1 January '09

Minor Planet Electronic Circulars

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


MPEC 2009-A05 - "21:19 UT" - Comet C/2008 X3 (LINEAR)


MPEC 2009-A04 - "18:28 UT" - Comet C/2008 Y3 (McNaught)


MPEC 2009-A03 - "17:44 UT" - Comet P/2008 Y2 (Gibbs)


<< DOU on 1 Jan. '09 >>  MPEC 2009-A02 - "07:07 UT" - Daily Orbit Update


MPEC 2009-A01 - "00:34 UT" - Comet P/2003 K2 = 2008 X4 (Christensen)

Observers  on 1 January '09

A total of 27 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 2 in MPECs 2009-A01 & 2009-A04 -- C/2008 Y3, P/2008 X4
J24Altamira Obs. in Spain, 1 in MPEC 2009-A05 -- C/2008 X3
621Bergisch Gladbach Obs. in Germany, 2 in MPEC 2009-A02 -- 2008 MR1, 177651
160Castelmartini Obs. in Italy, 8 in MPEC 2009-A02 -- 2008 YN27, 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SH82, 2005 BC, 2004 LV3, 162900
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2009-A02 & 2009-A03 -- P/2008 Y2, 2008 UC, 2007 UY1, 2005 XM4, 2005 TZ51, 2004 LV3, 2002 AU4, 68350
A77Chante-Perdrix Obs. in France, 1 in MPEC 2009-A05 -- C/2008 X3
B60Deep Sky Obs. in Germany, 2 in MPEC 2009-A02 -- 4183, 3360
448Desert Moon Obs. in New Mexico, 9 in MPECs 2009-A02, 2009-A03 & 2009-A04 -- C/2008 Y3, P/2008 Y2, 2008 TE157, 2008 CH116, 2006 UC63, 2002 AU4, 1999 CW8, 68350, 18882
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 2 in MPECs 2009-A03 & 2009-A04 -- C/2008 Y3, P/2008 Y2
372Geisei Obs. in Japan, 1 in MPEC 2009-A05 -- C/2008 X3
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-A02 -- 2008 MB5
355Hadano Obs. in Japan, 2 in MPECs 2009-A03 & 2009-A04 -- C/2008 Y3, P/2008 Y2
379Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2009-A02 -- 2008 YK2, 2008 WQ63, 2008 WL60, 2008 SH82, 2008 EV5, 2005 BC, 2004 LV3
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2009-A04 -- C/2008 Y3
B19Iluro Obs. in Spain, 5 in MPEC 2009-A02 -- 2008 WL60, 17511, 162361, 142348, 1864
G92Jarnac Obs. in Arizona, 1 in MPEC 2009-A02 -- 2008 XE2
704LINEAR in New Mexico, 17 in MPECs 2009-A02 & 2009-A05 -- 2008 YR27, 2008 YN27, 2008 YB29, 2008 XE3, C/2008 X3, 2008 WN2, 2008 UC, 2008 RY24, 2008 RT26, 2008 QT3, 2008 MZ, 2005 BC, 141052, 136923, 8567, 5011, 3122
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-A02, 2009-A03 & 2009-A04 -- 2008 YA29, C/2008 Y3, P/2008 Y2, 2008 XU2
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-A02, 2009-A03 & 2009-A05 -- P/2008 Y2, C/2008 X3, 2006 BC10, 189008, 163373, 154991, 154007
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPECs 2009-A02 & 2009-A05 -- 2008 YN27, 2008 XV2, C/2008 X3, 2008 WL60, 2008 VK14, 2008 SH82, 2008 MZ, 2008 EV5
D29Purple Mtn. Obs. XuYi Station (XuYi Sta.) in China, 2 in MPEC 2009-A02 -- 2001 FX9, 7358
H06RAS Obs. Mayhill in New Mexico, 2 in MPECs 2009-A03 & 2009-A04 -- C/2008 Y3, P/2008 Y2
H06\program code "\" (26) via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-A02 -- 141765
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-A03 & 2009-A04 -- C/2008 Y3, P/2008 Y2
204Schiaparelli Obs. in Italy, 6 in MPEC 2009-A02 -- 2008 YO2, 2008 YF, 2008 WQ63, 2008 EV5, 200754, 12711
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2009-A02 & 2009-A04 -- C/2008 Y3, 2008 LW16, 68031, 3552
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2009-A02 & 2009-A03 -- 2008 YD29, 2008 YB29, 2008 YA29, P/2008 Y2, 2008 TA1, 2008 RE80, 2005 UY5
A71Stixendorf Obs. in Austria, 1 in MPEC 2009-A05 -- C/2008 X3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 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
2008 YU30NEODyS16052038-2084121.31e-08-6.96-7.450NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/12/31.314 to 2008/12/31.519."
JPL Sentry05212032-2107491.6e-07-5.93-7.000JPL: "Analysis based on 20 observations spanning .20479 days (2008-Dec-31.31333 to 2008-Dec-31.51812)." Diameter approximately 0.086 km. from mean, weighted H=23.0.
2008 YT30NEODyS16052015-2088404.91e-08-4.39-5.290NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/12/31.091 to 2008/12/31.654."
JPL Sentry05212024-2106478.8e-08-4.18-5.110JPL: "Analysis based on 19 observations spanning .56316 days (2008-Dec-31.09054 to 2008-Dec-31.6537)." Diameter approximately 0.490 km. from mean, weighted H=19.2.
2008 YF30NEODyS20002021-2089178.58e-09-7.71-8.130NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/12/31.217 to 2008/12/31.325."
2008 YB29JPL Sentry1959R E M O V E DJPL: Risk listing removed at 1949 UTC.
2008 YA29JPL Sentry1959R E M O V E DJPL: Risk listing removed at 1949 UTC.
NEODyS1604R E M O V E D-
2008 YO2JPL Sentry20322052-2107396.8e-06-5.31-5.880JPL: "Analysis based on 26 observations spanning 1.0020 days (2008-Dec-21.16512 to 2008-Dec-22.16708)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
NEODyS16052052-208972.1e-06-5.78-5.910NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2008/12/21.166 to 2008/12/22.168."
2008 XU2JPL Sentry1959203915.1e-07-6.42-6.420JPL: "Analysis based on 41 observations spanning 24.989 days (2008-Dec-06.2616 to 2008-Dec-31.25022)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS1605203914.91e-07-6.43-6.430NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2008/12/06.262 to 2008/12/31.251."

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 1 January '09

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

2128Grabbed MPEC 2009-A05 - Comet C/2008 X3 (LINEAR) - see above
2032Noted that JPL Sentry has updated its 2008 YO2 risk assessment - see above
1959Noted that JPL Sentry has updated its 2008 XU2 risk assessment - see above
Noted that JPL Sentry has removed 2008 YA29 as an impact risk - see above
Noted that JPL Sentry has removed 2008 YB29 as an impact risk - see above
Noted that NEODyS has posted 2008 YF30 as an impact risk - see above
1933Grabbed MPEC 2009-A04 - Comet C/2008 Y3 (McNaught) - see above
1831Grabbed MPEC 2009-A02 - Daily Orbit Update - see above
Grabbed MPEC 2009-A03 - Comet P/2008 Y2 (Gibbs) - see above
1605Noted that NEODyS has updated its 2008 YO2 risk assessment - see above
1604Noted that NEODyS has reposted 2008 XU2 as an impact risk - see above
Noted that NEODyS has removed 2008 YA29 as an impact risk - see above
Noted that NEODyS has posted 2008 YT30 as an impact risk - see above
Noted that NEODyS has posted 2008 YU30 as an impact risk - see above
0522Grabbed MPEC 2009-A01 - Comet P/2003 K2 = 2008 X4 (Christensen) - see above
0521Noted that JPL Sentry has posted 2008 YT30 as an impact risk - see above
Noted that JPL Sentry has posted 2008 YU30 as an impact risk - see above