Contents  on 21 November '07

Resources:

The latest news: framed access (best), RSS news feed RSS news feed (flags updates), or redirection - Note: A/CC has a main Web site and a backup site, which now has its own backup 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 this year 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 21 November '07

The MPC's NEO Confirmation Page has 11 listings: 7 new, 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven new and four updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 32 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 21 November '07

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been ten MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-W52 - "22:29 UT" - 2007 WD5


MPEC 2007-W51 - "21:54 UT" - 2007 WC5


MPEC 2007-W50 - "21:51 UT" - 2007 WB5


MPEC 2007-W49 - "21:47 UT" - 2007 WZ4


MPEC 2007-W48 - "21:44 UT" - 2007 WX4


MPEC 2007-W47 - "21:41 UT" - 2007 WW4


MPEC 2007-W46 - "21:37 UT" - 2007 WV4


MPEC 2007-W45 - "21:34 UT" - 2007 WU4


MPEC 2007-W44 - "21:30 UT" - 2007 WT4


<< DOU on 21 Nov. '07 >>  MPEC 2007-W43 - "07:11 UT" - Daily Orbit Update

Observers  on 21 November '07

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2007-W43 & 2007-W49 -- 2007 WZ4, 2007 VD12, 2004 BV102, 162004
448Desert Moon Obs. in New Mexico, 6 in MPEC 2007-W43 -- 2007 VY7, 2007 VQ4, 2007 VH3, 2007 TV68, 2007 TE66, 152558
682Kanab Obs. in Utah, 1 in MPEC 2007-W45 -- 2007 WU4
704LINEAR in New Mexico, 6 in MPEC 2007-W43 -- 2007 VB191, 18736, 136617, 4503, 3553, 1862
130Lumezzane Obs. in Italy, 8 in MPEC 2007-W43 -- 2007 VX7, 2007 VT6, 2007 VK184, 2007 GS3, 2005 SA71, 1993 TQ2, 18736, 153271
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2007-W49 & 2007-W52 -- 2007 WZ4, 2007 WD5
474Mt. John Obs. in New Zealand, 3 in MPECs 2007-W43, 2007-W47 & 2007-W49 -- 2007 WZ4, 2007 WW4, 2007 VR29
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPECs 2007-W43, 2007-W44, 2007-W45, 2007-W48, 2007-W49, 2007-W50, 2007-W51 & 2007-W52 -- 2007 WZ4, 2007 WY3, 2007 WX4, 2007 WU4, 2007 WT4, 2007 WK3, 2007 WJ3, 2007 WD5, 2007 WC5, 2007 WB5, 2007 WA, 2007 VU83, 2007 VE191, 2007 VB191, 2005 XL80, 1996 FG3, 21374, 140333, 2101
D21Shenton Park Obs. in Western Australia, 2 in MPECs 2007-W47 & 2007-W49 -- 2007 WZ4, 2007 WW4
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2007-W43 & 2007-W47 -- 2007 WW4, 66146, 7482
691Spacewatch 0.9m telescope in Arizona, 13 in MPECs 2007-W43, 2007-W44, 2007-W45 & 2007-W46 -- 2007 WV4, 2007 WU4, 2007 WT4, 2007 VV6, 2007 VG189, 2007 VB191, 2007 SS1, 2003 KW16, 2001 HW15, 1993 VD, 19764, 164184, 163051
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2007-W43, 2007-W44, 2007-W45 & 2007-W46 -- 2007 WV4, 2007 WV3, 2007 WU4, 2007 WT4, 2007 WT3, 2007 WP3, 2007 VP243, 2007 VN243, 2007 VH189, 2007 VG189, 2007 VE191
6735Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2007-W47 & 2007-W49 -- 2007 WZ4, 2007 WW4

Impact Risk Monitoring  on 21 November '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks.
Note that the time horizon for JPL is 100 years from today and for NEODyS is now 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
2007 WY3JPL Sentry17022016-2106752.3e-08-4.08-5.050JPL: "Analysis based on 21 observations spanning 1.9722 days (2007-Nov-18.44048 to 2007-Nov-20.41271)." Diameter approximately 0.739 km. from mean, weighted H=18.3.
NEODyS13572014-2090911.89e-08-4.08-5.190NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2007/11/18.441 to 2007/11/20.413."
2007 WV3JPL Sentry1902R E M O V E DJPL: Risk listing removed at 1737 UTC.
NEODyS1356R E M O V E D
2007 WT3JPL Sentry1356210113.5e-07-6.06-6.060JPL: "Analysis based on 15 observations spanning 2.0105 days (2007-Nov-18.29804 to 2007-Nov-20.30856)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2007 WP3JPL Sentry13562104-2107136.3e-06-4.75-5.250JPL: "Analysis based on 41 observations spanning 2.0309 days (2007-Nov-18.26457 to 2007-Nov-20.29549)." Diameter approximately 0.067 km. from mean, weighted H=23.5.
2007 VN243JPL Sentry14302067-208637.0e-07-4.76-4.880JPL: "Analysis based on 22 observations spanning 5.0194 days (2007-Nov-15.24381 to 2007-Nov-20.26323)." Diameter approximately 0.130 km. from mean, weighted H=22.1.
NEODyS13572048-208167.59e-07-4.72-4.880NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2007/11/15.245 to 2007/11/20.264."
2007 VE191NEODyS1357201513.6e-05-2.93-2.930NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2007/11/15.267 to 2007/11/20.173."
JPL Sentry1356201513.6e-05-2.94-2.940JPL: "Analysis based on 41 observations spanning 4.9064 days (2007-Nov-15.26603 to 2007-Nov-20.17243)." Diameter approximately 0.058 km. from mean, weighted H=23.8.
2007 VH189NEODyS13572013-2054183.72e-07-4.86-5.010NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2007/11/14.352 to 2007/11/20.202."
JPL Sentry13562013-2049153.3e-07-4.94-5.170JPL: "Analysis based on 23 observations spanning 5.8502 days (2007-Nov-14.35096 to 2007-Nov-20.20114)." Diameter approximately 0.073 km. from mean, weighted H=23.3.
2007 VK184JPL Sentry17022035-2062226.1e-05-2.64-3.020JPL: "Analysis based on 64 observations spanning 7.1116 days (2007-Nov-12.13904 to 2007-Nov-19.25067)." Diameter approximately 0.130 km. from mean, weighted H=22.0.
NEODyS13572041-2062285.99e-05-2.65-3.030NEODyS: "Based on 64 optical observations (of which 0 are rejected as outliers) from 2007/11/12.140 to 2007/11/19.251."

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 21 November '07

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

2238Grabbed MPEC 2007-W52 - 2007 WD5 - see above
2208Grabbed MPEC 2007-W47 - 2007 WW4 - see above
Grabbed MPEC 2007-W49 - 2007 WZ4 - see above
Grabbed MPEC 2007-W50 - 2007 WB5 - see above
Grabbed MPEC 2007-W51 - 2007 WC5 - see above
2207Grabbed MPEC 2007-W46 - 2007 WV4 - see above
Grabbed MPEC 2007-W48 - 2007 WX4 - see above
2137Grabbed MPEC 2007-W44 - 2007 WT4 - see above
Grabbed MPEC 2007-W45 - 2007 WU4 - see above
1902Noted that JPL Sentry has removed 2007 WV3 as an impact risk - see above
1702Noted that JPL Sentry has updated its 2007 VK184 risk assessment - see above
Noted that JPL Sentry has posted 2007 WY3 as an impact risk - see above
1430Noted that JPL Sentry has updated its 2007 VN243 risk assessment - see above
1357Noted that NEODyS has updated its 2007 VE191 risk assessment - see above
Noted that NEODyS has updated its 2007 VH189 risk assessment - see above
Noted that NEODyS has updated its 2007 VK184 risk assessment - see above
Noted that NEODyS has updated its 2007 VN243 risk assessment - see above
Grabbed MPEC 2007-W43 - Daily Orbit Update - see above
1356Noted that JPL Sentry has updated its 2007 VE191 risk assessment - see above
Noted that JPL Sentry has updated its 2007 VH189 risk assessment - see above
Noted that JPL Sentry has updated its 2007 WP3 risk assessment - see above
Noted that JPL Sentry has updated its 2007 WT3 risk assessment - see above
Noted that NEODyS has removed 2007 WV3 as an impact risk - see above
Noted that NEODyS has posted 2007 WY3 as an impact risk - see above