Contents  on 31 October '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 31 October '08

The MPC's NEO Confirmation Page has 10 listings: 4 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and six updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of eighteen 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 31 October '08

Minor Planet Electronic Circulars

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


MPEC 2008-U108 - "21:06 UT" - 2008 UP100


MPEC 2008-U107 - "13:44 UT" - 2008 UW99


MPEC 2008-U106 - "13:42 UT" - 2008 UV99


MPEC 2008-U105 - "13:39 UT" - 2008 UU99


MPEC 2008-U104 - "13:07 UT" - 2008 UT99


<< DOU on 31 Oct. '08 >>  MPEC 2008-U103 - "06:15 UT" - Daily Orbit Update


MPEC 2008-U102 - "00:14 UT" - 2008 UU95

Observers  on 31 October '08

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 3 in MPEC 2008-U103 -- 2006 GZ, 2002 VY94, 168044
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPECs 2008-U103 & 2008-U105 -- 2008 UZ94, 2008 UV5, 2008 UU99, 2008 UF1, 2008 UE1, 2008 UB95, 2008 TX3, 2008 QF, 2008 OX8, 2003 DX10
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2008-U103, 2008-U106, 2008-U107 & 2008-U108 -- 2008 UW99, 2008 UV99, 2008 UP100, 2008 MR1, 2007 GS3, 2001 UY4, 1997 US9, 96744, 85774, 163000, 144901, 141765, 7888, 5011, 4450, 1627
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-U103 -- 2008 UD7, 2008 TN26, 2008 TE157, 2008 SJ82, 2008 SC85, 4596
808El Leoncito Obs. in Argentina, 6 in MPEC 2008-U103 -- 87684, 53319, 142348, 5332, 5131, 1627
J95Great Shefford Obs. in England, 3 in MPECs 2008-U102, 2008-U105 & 2008-U108 -- 2008 UU99, 2008 UU95, 2008 UP100
379Hamamatsu-Yuto Obs. in Japan, 7 in MPEC 2008-U103 -- 2008 US4, 2008 SQ1, 2008 SE, 2006 SZ217, 2001 UY4, 162900, 1865
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-U103 -- 2008 UC95
704LINEAR in New Mexico, 13 in MPEC 2008-U103 -- 2008 UZ94, 2008 UX, 2008 UN90, 2008 UE7, 2008 UC95, 2008 TF4, 2005 LR3, 2001 SG10, 54071, 144901, 3691, 1943, 887
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2008-U102, 2008-U103, 2008-U104, 2008-U105, 2008-U106, 2008-U107 & 2008-U108 -- 2008 UW99, 2008 UV99, 2008 UU99, 2008 UU95, 2008 UT99, 2008 UP100, 2008 UB7, 2008 ST7
5682David Tholen's team on Mauna Kea in Hawaii, 2 in MPEC 2008-U103 -- 2005 VO5, 2004 XA45
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-U102, 2008-U103 & 2008-U106 -- 2008 UV99, 2008 UU95, 2008 RY24, 2007 DM41, 2005 YY128, 2004 BG11, 2001 TC, 2000 SP43, 66008, 189552, 6611
691Spacewatch 0.9m telescope in Arizona, 17 in MPECs 2008-U103 & 2008-U104 -- 2008 UT99, 2008 SW11, 2007 EM88, 2005 YY128, 2005 TR15, 2004 TL19, 2003 YL, 2002 VY94, 2001 VG5, 2001 SG276, 2001 QP181, 90075, 22753, 19764, 159923, 155110, 137799
291Spacewatch 1.8m telescope in Arizona, 19 in MPECs 2008-U103, 2008-U104 & 2008-U105 -- 2008 UZ94, 2008 UU99, 2008 UT99, 2008 US2, 2008 UR2, 2008 UO90, 2008 UN3, 2008 UM3, 2008 UE1, 2008 UB95, 2008 UB92, 2008 UB, 2008 UA92, 2008 TR10, 2008 TA1, 2008 SO, 2006 UC63, 2004 BG11, 2001 YX11
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-U103 -- 2004 SB20
H53Thompsonville Obs. in Illinois, 1 in MPEC 2008-U103 -- 1980
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 October '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 UW99JPL Sentry20102010-21083067.2e-06-4.28-4.740JPL: "Analysis based on 13 observations spanning .05462 days (2008-Oct-31.45784 to 2008-Oct-31.51246)." Diameter approximately 0.040 km. from mean, weighted H=24.6.
2008 UU95NEODyS13202011-20901194.17e-07-5.19-5.510NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/10/30.380 to 2008/10/30.963."
JPL Sentry03592011-21084251.2e-06-4.80-5.320JPL: "Analysis based on 15 observations spanning .58345 days (2008-Oct-30.37925 to 2008-Oct-30.9627)." Diameter approximately 0.068 km. from mean, weighted H=23.5.
2008 UT95JPL Sentry0157207718.6e-09-9.10-9.100JPL: "Analysis based on 16 observations spanning .47706 days (2008-Oct-30.37815 to 2008-Oct-30.85521)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2008 UB95JPL Sentry1320R E M O V E DJPL: Risk listing removed at 1035 UTC.
2008 UZ94JPL Sentry1320R E M O V E DJPL: Risk listing removed at 0951 UTC.
2008 UB92NEODyS1320R E M O V E D-
JPL Sentry1320R E M O V E DJPL: Risk listing removed at 1030 UTC.
2008 UA92JPL Sentry23012063-207821.2e-06-7.26-7.280JPL #2 for the day: "Analysis based on 17 observations spanning 1.9764 days (2008-Oct-28.40865 to 2008-Oct-30.38509)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
NEODyS13202063-207829.63e-07-7.37-7.370NEODyS: "Based on 17 optical observations (of which 1 are rejected as outliers) from 2008/10/28.409 to 2008/10/30.386."
2008 UB7NEODyS20102044-2088448.88e-05-3.31-3.820NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2008/10/26.260 to 2008/10/30.323."
JPL Sentry13202044-2100389.7e-05-3.28-3.800JPL: "Analysis based on 43 observations spanning 4.0635 days (2008-Oct-26.25877 to 2008-Oct-30.32229)." Diameter approximately 0.059 km. from mean, weighted H=23.8.
2008 ST7JPL Sentry13202074-2105213.5e-05-4.34-4.630JPL: "Analysis based on 114 observations spanning 36.060 days (2008-Sep-24.29993 to 2008-Oct-30.35974)." Diameter approximately 0.052 km. from mean, weighted H=24.1.
NEODyS13202074-208964.34e-07-6.12-6.310NEODyS: "Based on 120 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/30.360."

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 31 October '08

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

2301Noted that JPL Sentry has updated its 2008 UA92 risk assessment - see above
2232Grabbed MPEC 2008-U108 - 2008 UP100 - see above
2010Noted that NEODyS has updated its 2008 UB7 risk assessment - see above
Noted that JPL Sentry has posted 2008 UW99 as an impact risk - see above
1353Grabbed MPEC 2008-U104 - 2008 UT99 - see above
Grabbed MPEC 2008-U105 - 2008 UU99 - see above
Grabbed MPEC 2008-U106 - 2008 UV99 - see above
Grabbed MPEC 2008-U107 - 2008 UW99 - see above
1320Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above
Noted that NEODyS has updated its 2008 ST7 risk assessment - see above
Noted that JPL Sentry has updated its 2008 UA92 risk assessment - see above
Noted that NEODyS has updated its 2008 UA92 risk assessment - see above
Noted that JPL Sentry has updated its 2008 UB7 risk assessment - see above
Noted that JPL Sentry has removed 2008 UB92 as an impact risk - see above
Noted that NEODyS has removed 2008 UB92 as an impact risk - see above
Noted that JPL Sentry has removed 2008 UB95 as an impact risk - see above
Noted that NEODyS has posted 2008 UU95 as an impact risk - see above
Noted that JPL Sentry has removed 2008 UZ94 as an impact risk - see above
Grabbed MPEC 2008-U103 - Daily Orbit Update - see above
0359Noted that JPL Sentry has posted 2008 UU95 as an impact risk - see above
0157Noted that JPL Sentry has posted 2008 UT95 as an impact risk - see above
0030Grabbed MPEC 2008-U102 - 2008 UU95 - see above