Contents  on 27 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 27 November '07

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (last checked at 2356 UTC).

New MPECs  on 27 November '07

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2007-W76 - "17:22 UT" - 2007 VR183


<< DOU on 27 Nov. '07 >>  MPEC 2007-W75 - "07:11 UT" - Daily Orbit Update

Observers  on 27 November '07

Nine observing facilities appear in today's MPECs.

CodeObserver / observatory
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2007-W75 -- 66251
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-W76 -- 2007 VR183
H51Greiner Research Obs. in Wisconsin, 5 in MPEC 2007-W75 -- 2007 VT6, 2007 VE191, 2007 US6, 2007 TG15, 2007 SE11
682Kanab Obs. in Utah, 1 in MPEC 2007-W75 -- 2007 WV4
699LONEOS in Arizona, 1 in MPEC 2007-W76 -- 2007 VR183
J40Malaga Obs. in Spain, 1 in MPEC 2007-W75 -- 86324
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2007-W76 -- 2007 VR183
A24New Millennium Obs. in Italy, 22 in MPEC 2007-W75 -- 2007 US6, 2007 TG8, 2007 TG15, 2007 TB23, 2007 SE11, 2007 RU12, 2007 LR32, 2004 RD252, 1999 AQ10, 1993 TQ2, 99907, 86324, 85804, 30997, 20826, 170502, 168044, 143678, 138893, 137084, 3553, 2212
204Schiaparelli Obs. in Italy, 1 in MPEC 2007-W75 -- 2007 UN12

Impact Risk Monitoring  on 27 November '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2356 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 WV4NEODyS14312023-2089612.1e-07-3.43-3.970NEODyS: "Based on 16 optical observations (of which 1 are rejected as outliers) from 2007/11/19.394 to 2007/11/24.059."
JPL Sentry14302023-2107522.1e-07-3.48-4.070JPL: "Analysis based on 15 observations spanning 4.6648 days (2007-Nov-19.39373 to 2007-Nov-24.05852)." Diameter approximately 0.461 km. from mean, weighted H=19.3.
2007 VE191JPL Sentry1430201511.3e-07-5.32-5.320JPL: "Analysis based on 51 observations spanning 11.940 days (2007-Nov-15.26603 to 2007-Nov-27.20581)." Diameter approximately 0.061 km. from mean, weighted H=23.7.
NEODyS1430R E M O V E D
2007 UN12NEODyS14312069-2090227.5e-05-6.35-7.100NEODyS: "Based on 123 optical observations (of which 0 are rejected as outliers) from 2007/10/21.373 to 2007/11/15.258."
JPL Sentry14302069-2107302.3e-04-5.92-6.700JPL: "Analysis based on 123 observations spanning 24.885 days (2007-Oct-21.37247 to 2007-Nov-15.25773)." Diameter approximately 0.006 km. from mean, weighted H=28.7.

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 27 November '07

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

1819Grabbed MPEC 2007-W76 - 2007 VR183 - see above
1431Noted that NEODyS has updated its 2007 UN12 risk assessment - see above
Noted that NEODyS has updated its 2007 WV4 risk assessment - see above
Grabbed MPEC 2007-W75 - Daily Orbit Update - see above
1430Noted that JPL Sentry has updated its 2007 UN12 risk assessment - see above
Noted that JPL Sentry has updated its 2007 VE191 risk assessment - see above
Noted that NEODyS has removed 2007 VE191 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 WV4 risk assessment - see above