Contents  on 3 December '08

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 3 December '08

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four updated listings. All of these were "one nighters." So far The Tracking News has counted a total of fifteen 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 3 December '08

Minor Planet Electronic Circulars

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


MPEC 2008-X34 - "23:41 UT" - 2008 XC1


MPEC 2008-X33 - "23:38 UT" - 2008 XB1


MPEC 2008-X32 - "15:24 UT" - 2008 XS


MPEC 2008-X31 - "15:21 UT" - 2008 XP


MPEC 2008-X30 - "13:41 UT" - 2008 XO


MPEC 2008-X29 - "13:38 UT" - 2008 XN


MPEC 2008-X28 - "13:36 UT" - 2008 XM


<< DOU on 3 Dec. '08 >>  MPEC 2008-X27 - "07:10 UT" - Daily Orbit Update


MPEC 2008-X26 - "04:34 UT" - 2005 QU182

Observers  on 3 December '08

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2008-X27 -- 2008 WY32, 2008 WL61, 2008 WH60, 2008 WG14
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-X34 -- 2008 XC1
703Catalina Sky Survey (CSS) in Arizona, 28 in MPECs 2008-X27, 2008-X30, 2008-X33 & 2008-X34 -- 2008 XO, 2008 XC1, 2008 XB1, 2008 WY94, 2008 UZ94, 2008 UL90, 2008 RG98, 2008 MZ, 2008 LW8, 2006 SZ217, 2005 WD1, 2005 VY17, 2003 WD158, 89355, 87684, 87024, 42286, 194268, 19356, 189058, 171576, 16834, 154715, 153306, 137032, 8567, 3360, 1627
448Desert Moon Obs. in New Mexico, 2 in MPEC 2008-X27 -- 2008 WL, 2008 SO1
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-X33 -- 2008 XB1
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-X27 -- 2008 WM61
J95Great Shefford Obs. in England, 1 in MPEC 2008-X33 -- 2008 XB1
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2008-X28 -- 2008 XM
379Hamamatsu-Yuto Obs. in Japan, 9 in MPEC 2008-X27 -- 2008 VU4, 2008 VK14, 2008 UE7, 2008 SQ1, 2008 MZ, 2006 VB14, 2006 SZ217, 2005 TZ51, 2001 LM5
G92Jarnac Obs. in Arizona, 1 in MPEC 2008-X27 -- 2008 SP7
695Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2008-X26 -- 2005 QU182
704LINEAR in New Mexico, 16 in MPECs 2008-X27, 2008-X28 & 2008-X32 -- 2008 XS, 2008 XM, 2008 WK32, 2008 VF, 2008 UC95, 2008 MZ, 2001 XN254, 90075, 53319, 194386, 18882, 154715, 8567, 7335, 5011, 2368
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2008-X27 -- 2008 UE7
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-X27, 2008-X28, 2008-X29, 2008-X30 & 2008-X32 -- 2008 XS, 2008 XO, 2008 XN, 2008 XM, 2008 VE, 2008 VB1, 2008 PL3, 1999 JO8, 54071, 4183
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-X26 -- 2005 QU182
A13Naef Obs. in Switzerland, 6 in MPEC 2008-X27 -- 2008 MZ, 199801, 152742, 136849, 7358, 2368
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 13 in MPEC 2008-X27 -- 2008 WN2, 2008 WL60, 2008 WK61, 2008 WK, 2008 WG14, 2008 WB59, 2008 VH14, 2008 UE7, 2008 UC95, 2008 RT26, 2008 MZ, 2006 SZ217, 2001 WA25
204Schiaparelli Obs. in Italy, 1 in MPEC 2008-X33 -- 2008 XB1
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2008-X27 -- 2008 WY94, 10563, 5332
691Spacewatch 0.9m telescope in Arizona, 10 in MPECs 2008-X27 & 2008-X31 -- 2008 XP, 2008 WG14, 2008 MZ, 2006 OB5, 190166, 18109, 163373, 153220, 137925, 7335
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2008-X27 & 2008-X31 -- 2008 XP, 2008 WZ13, 2008 WY13, 2008 WQ63, 2008 WM64, 2008 WJ96, 2008 WH96, 2008 WB, 2008 SJ82, 2007 EM88
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 3 December '08

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 XOJPL Sentry16582024-209852.9e-09-7.75-8.060JPL: "Analysis based on 10 observations spanning .97092 days (2008-Dec-02.41885 to 2008-Dec-03.38977)." Diameter approximately 0.067 km. from mean, weighted H=23.5.
2008 XNJPL Sentry16582010-2105502.0e-07-3.41-3.470JPL: "Analysis based on 12 observations spanning .95260 days (2008-Dec-02.36013 to 2008-Dec-03.31273)." Diameter approximately 0.341 km. from mean, weighted H=20.0.
2008 XKNEODyS16012034-2085186.25e-08-8.33-8.800NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/12/02.281 to 2008/12/02.368."
2008 WJ96JPL Sentry1503R E M O V E DJPL: Risk listing removed at 0952 UTC.
NEODyS1503R E M O V E D-
2008 WH96JPL Sentry1503R E M O V E DJPL: Risk listing removed at 0953 UTC.
NEODyS1503R E M O V E D-
2008 WY94JPL Sentry15032045-2074111.5e-05-5.39-5.500JPL: "Analysis based on 21 observations spanning 2.8848 days (2008-Nov-29.54021 to 2008-Dec-02.42502)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
NEODyS15032061-2089251.99e-05-5.27-5.360NEODyS: "Based on 22 optical observations (of which 1 are rejected as outliers) from 2008/11/29.541 to 2008/12/02.426."
2008 WZ13JPL Sentry15032037-2106221.1e-06-2.85-3.140JPL: "Analysis based on 50 observations spanning 12.127 days (2008-Nov-20.27557 to 2008-Dec-02.40258)." Diameter approximately 0.600 km. from mean, weighted H=18.8.
NEODyS15032037-2090131.05e-06-2.83-3.110NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2008/11/20.276 to 2008/12/02.403."

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 3 December '08

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

2358Grabbed MPEC 2008-X33 - 2008 XB1 - see above
Grabbed MPEC 2008-X34 - 2008 XC1 - see above
1658Noted that JPL Sentry has posted 2008 XN as an impact risk - see above
Noted that JPL Sentry has posted 2008 XO as an impact risk - see above
1600Noted that NEODyS has posted 2008 XK as an impact risk - see above
Grabbed MPEC 2008-X31 - 2008 XP - see above
Grabbed MPEC 2008-X32 - 2008 XS - see above
1503Noted that JPL Sentry has removed 2008 WH96 as an impact risk - see above
Noted that NEODyS has removed 2008 WH96 as an impact risk - see above
Noted that JPL Sentry has removed 2008 WJ96 as an impact risk - see above
Noted that NEODyS has removed 2008 WJ96 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 WY94 risk assessment - see above
Noted that NEODyS has updated its 2008 WY94 risk assessment - see above
Noted that JPL Sentry has updated its 2008 WZ13 risk assessment - see above
Noted that NEODyS has updated its 2008 WZ13 risk assessment - see above
Grabbed MPEC 2008-X27 - Daily Orbit Update - see above
Grabbed MPEC 2008-X28 - 2008 XM - see above
Grabbed MPEC 2008-X29 - 2008 XN - see above
Grabbed MPEC 2008-X30 - 2008 XO - see above
0602Grabbed MPEC 2008-X26 - 2005 QU182 - see above