Contents  on 23 November '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 23 November '08

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of six 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 23 November '08

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-W55 - "23:20 UT" - 2008 WB59


<< DOU on 23 Nov. '08 >>  MPEC 2008-W54 - "07:08 UT" - Daily Orbit Update

Observers  on 23 November '08

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

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 13 in MPEC 2008-W54 -- 2008 WX32, 2008 WN, 2008 WL, 2008 WK32, 2008 WK, 2008 WD, 2008 WA14, 2008 VN, 2008 VK14, 2008 VF, 2008 UW99, 2008 UE7, 2008 TR10
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2008-W54 & 2008-W55 -- 2008 WB59, 85774, 52768, 18882, 16834, 141765
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-W55 -- 2008 WB59
B23Fiamene Obs. in Italy, 6 in MPEC 2008-W54 -- 2008 SQ1, 2008 SE, 2008 MZ, 2008 MR1, 2006 SZ217, 199801
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-W54 -- 141765
J95Great Shefford Obs. in England, 1 in MPEC 2008-W54 -- 2008 WD
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-W54 -- 2008 UE7, 2006 SZ217, 2004 XK3
682Kanab Obs. in Utah, 1 in MPEC 2008-W54 -- 2008 WW32
704LINEAR in New Mexico, 16 in MPEC 2008-W54 -- 2008 VU4, 2008 VK14, 2008 VG14, 2008 SP7, 2008 RG98, 2008 QT3, 2008 MR1, 2002 VY94, 2001 WJ2, 2001 WA25, 2001 LM5, 194126, 17511, 162900, 162149, 12538
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-W54 -- 2004 XN44
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-W54 -- 96315
A24New Millennium Obs. in Italy, 7 in MPEC 2008-W54 -- 53430, 162900, 162679, 4183, 3200, 1916, 1620
J69North Obs. in England, 1 in MPEC 2008-W54 -- 2006 SZ217
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2008-W54 -- 2008 VU4, 2008 UE7, 2008 TK157, 2008 MR1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2008-W54 -- 2008 UE7, 2008 RY24, 2008 RG98, 2008 MZ, 2006 SZ217, 1996 TE9, 1994 AW1
941Pla D'Arguines Obs. in Spain, 1 in MPEC 2008-W54 -- 2008 WD14
233San Vito Obs. in Italy, 1 in MPEC 2008-W54 -- 2008 SQ1
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-W54 -- 2008 WD14
291Spacewatch 1.8m telescope in Arizona, 6 in MPEC 2008-W54 -- 2008 WK32, 2008 WF14, 2008 WD14, 2008 VL14, 2001 XQ, 2001 OG25
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-W55 -- 2008 WB59
A48Verona Obs. in Italy, 4 in MPEC 2008-W54 -- 2008 UE7, 2008 SQ1, 2006 SZ217, 2004 XK3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 23 November '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 WY32NEODyS23012010-2073702.66e-08-5.73-6.030NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/11/22.176 to 2008/11/22.251."
2008 WX32NEODyS15122013-208389.03e-10-5.34-5.380NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/11/21.293 to 2008/11/22.329."
JPL Sentry15112033-208272.2e-09-5.67-5.960JPL: "Analysis based on 20 observations spanning 1.0359 days (2008-Nov-21.29224 to 2008-Nov-22.32811)." Diameter approximately 0.541 km. from mean, weighted H=19.0.
2008 WW32NEODyS15122021-208022.05e-10-8.04-8.180NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/11/21.130 to 2008/11/22.206."
JPL Sentry15112032-208021.3e-09-6.74-6.770JPL: "Analysis based on 14 observations spanning 1.0767 days (2008-Nov-21.12895 to 2008-Nov-22.20561)." Diameter approximately 0.200 km. from mean, weighted H=21.1.
2008 WK32JPL Sentry15112034-209865.5e-09-6.14-6.530JPL: "Analysis based on 20 observations spanning 1.1217 days (2008-Nov-21.32959 to 2008-Nov-22.45132)." Diameter approximately 0.323 km. from mean, weighted H=20.1.
NEODyS1511R E M O V E D-
2008 WD14JPL Sentry1511R E M O V E DJPL: Risk listing removed at 0952 UTC.
2008 VL14NEODyS1512207626.86e-07-4.01-4.230NEODyS: "Based on 47 optical observations (of which 1 are rejected as outliers) from 2008/11/09.266 to 2008/11/22.289."
JPL Sentry15112071-207637.7e-07-3.95-4.250JPL: "Analysis based on 46 observations spanning 13.022 days (2008-Nov-09.2656 to 2008-Nov-22.28778)." Diameter approximately 0.202 km. from mean, weighted H=21.1.
2008 UW99JPL Sentry1511209318.6e-07-6.26-6.260JPL: "Analysis based on 45 observations spanning 21.741 days (2008-Oct-31.45784 to 2008-Nov-22.1992)." Diameter approximately 0.039 km. from mean, weighted H=24.7.

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 23 November '08

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

2359Grabbed MPEC 2008-W55 - 2008 WB59 - see above
2300Noted that NEODyS has posted 2008 WY32 as an impact risk - see above
1512Noted that NEODyS has updated its 2008 VL14 risk assessment - see above
Grabbed MPEC 2008-W54 - Daily Orbit Update - see above
1511Noted that JPL Sentry has updated its 2008 UW99 risk assessment - see above
Noted that JPL Sentry has updated its 2008 VL14 risk assessment - see above
Noted that JPL Sentry has removed 2008 WD14 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 WK32 risk assessment - see above
Noted that NEODyS has removed 2008 WK32 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 WW32 risk assessment - see above
Noted that NEODyS has posted 2008 WW32 as an impact risk - see above
Noted that JPL Sentry has posted 2008 WX32 as an impact risk - see above
Noted that NEODyS has posted 2008 WX32 as an impact risk - see above