Contents  on 24 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 24 November '08

The MPC's NEO Confirmation Page has 15 listings: 4 new, 11 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and eleven updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of 20 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 24 November '08

Minor Planet Electronic Circulars

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


MPEC 2008-W61 - "17:30 UT" - 2005 YS


MPEC 2008-W60 - "15:58 UT" - 2008 WL60


MPEC 2008-W59 - "15:53 UT" - 2008 WK60


MPEC 2008-W58 - "15:46 UT" - 2008 WJ60


MPEC 2008-W57 - "15:41 UT" - 2008 WH60


<< DOU on 24 Nov. '08 >>  MPEC 2008-W56 - "07:08 UT" - Daily Orbit Update

Observers  on 24 November '08

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2008-W56 -- 2008 WY13, 2008 WP2, 2008 WK32, 2008 WD, 2005 JE46, 2002 BK25, 2000 EW70, 1994 UG
493Calar Alto Obs. in Spain, 1 in MPEC 2008-W56 -- 2008 WK
703Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2008-W56 & 2008-W60 -- 2008 WL60, 2005 YS165, 2003 WX25, 2001 FX9, 54071, 136849, 4183, 3199, 1916
G58Chabot Obs. in northern California, 2 in MPEC 2008-W56 -- 136923, 1916
651Grasslands Obs. in Arizona, 2 in MPECs 2008-W57 & 2008-W59 -- 2008 WK60, 2008 WH60
J95Great Shefford Obs. in England, 2 in MPEC 2008-W56 -- 2008 WY32, 2008 WB59
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2008-W59 -- 2008 WK60
B15Inastars Obs. in Germany, 1 in MPEC 2008-W56 -- 168044
682Kanab Obs. in Utah, 1 in MPEC 2008-W56 -- 2008 WX32
704LINEAR in New Mexico, 14 in MPECs 2008-W56 & 2008-W57 -- 2008 WN2, 2008 WH60, 2008 WD14, 2008 TK157, 2005 WS55, 54690, 196068, 192559, 189552, 141079, 3200, 1916, 1865, 1620
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2008-W57 & 2008-W58 -- 2008 WJ60, 2008 WH60
118Modra Obs. in Slovakia, 1 in MPEC 2008-W56 -- 2008 WB59
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2008-W56, 2008-W57 & 2008-W58 -- 2008 WJ60, 2008 WH60, 162149
A24New Millennium Obs. in Italy, 2 in MPEC 2008-W56 -- 4183, 1620
J53Posadas Obs. in Spain, 4 in MPEC 2008-W56 -- 2008 SQ1, 85236, 36236, 3360
H36Sandlot Obs. in Kansas, 4 in MPEC 2008-W56 -- 2008 WL, 2008 WE, 2008 WD, 2008 WC
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2008-W56 & 2008-W59 -- 2008 WK60, 2008 GV20, 8035
587Sormano Obs. in Italy, 1 in MPEC 2008-W56 -- 2008 WC
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-W56 -- 190166
291Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2008-W56 & 2008-W58 -- 2008 WW32, 2008 WJ60, 2008 WD14, 2008 VL14, 2008 UZ94, 2008 UZ91, 2008 UW91, 2008 UV91, 2008 UU1, 2008 RE80, 2003 TN1, 2001 SF286
673Table Mtn. Obs. in southern California, 1 in MPEC 2008-W60 -- 2008 WL60
6735Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-W56 & 2008-W61 -- 2008 WP2, 2008 WC14, 2005 YS
B39Tradate Obs. in Italy, 4 in MPEC 2008-W56 -- 2008 VK14, 2006 SZ217, 53430, 138852
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 November '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 WB59NEODyS14192021-2089257.78e-08-4.00-4.530NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/11/23.366 to 2008/11/23.979."
JPL Sentry14182021-2107671.8e-07-3.66-4.340JPL #2 for the day: "Analysis based on 22 observations spanning .61322 days (2008-Nov-23.36479 to 2008-Nov-23.97801)." Diameter approximately 0.520 km. from mean, weighted H=19.1.
2008 WY32NEODyS1418R E M O V E D-
2008 WX32NEODyS1418R E M O V E D-
JPL Sentry1418R E M O V E DJPL: Risk listing removed at 0957 UTC.
2008 WW32NEODyS14192053-205521.17e-08-6.12-6.160NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2008/11/21.130 to 2008/11/24.124."
JPL Sentry14182053-210521.2e-09-6.96-7.000JPL: "Analysis based on 16 observations spanning 2.9945 days (2008-Nov-21.12895 to 2008-Nov-24.12341)." Diameter approximately 0.228 km. from mean, weighted H=20.9.
2008 WK32JPL Sentry1418R E M O V E DJPL: Risk listing removed at 0955 UTC.
2008 WY13NEODyS14192064-208334.17e-08-5.53-5.540NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2008/11/20.275 to 2008/11/23.273."
JPL Sentry14182064-210896.7e-08-5.35-5.490JPL: "Analysis based on 23 observations spanning 2.9985 days (2008-Nov-20.27393 to 2008-Nov-23.27243)." Diameter approximately 0.170 km. from mean, weighted H=21.5.
2008 VL14NEODyS14192071-207636.7e-07-4.01-4.380NEODyS: "Based on 50 optical observations (of which 1 are rejected as outliers) from 2008/11/09.266 to 2008/11/24.222."
JPL Sentry14182071-207636.3e-07-4.04-4.420JPL: "Analysis based on 49 observations spanning 14.955 days (2008-Nov-09.2656 to 2008-Nov-24.22096)." Diameter approximately 0.200 km. from mean, weighted H=21.1.

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 24 November '08

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

1816Grabbed MPEC 2008-W61 - 2005 YS - see above
1658Grabbed MPEC 2008-W57 - 2008 WH60 - see above
Grabbed MPEC 2008-W58 - 2008 WJ60 - see above
Grabbed MPEC 2008-W59 - 2008 WK60 - see above
Grabbed MPEC 2008-W60 - 2008 WL60 - see above
1419Noted that NEODyS has updated its 2008 VL14 risk assessment - see above
Noted that NEODyS has updated its 2008 WW32 risk assessment - see above
Noted that NEODyS has updated its 2008 WY13 risk assessment - see above
Grabbed MPEC 2008-W56 - Daily Orbit Update - see above
1418Noted that JPL Sentry has updated its 2008 VL14 risk assessment - see above
Noted that JPL Sentry has updated its 2008 WB59 risk assessment - see above
Noted that NEODyS has posted 2008 WB59 as an impact risk - see above
Noted that JPL Sentry 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 JPL Sentry has removed 2008 WX32 as an impact risk - see above
Noted that NEODyS has removed 2008 WX32 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 WY13 risk assessment - see above
Noted that NEODyS has removed 2008 WY32 as an impact risk - see above
0139Noted that JPL Sentry has posted 2008 WB59 as an impact risk - see above