Contents  on 24 October '07

Resources:

NEOCP Activity  on 24 October '07

The MPC's NEO Confirmation Page has 5 listings: 5 updated

When last checked at 2356 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of seven 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 October '07

Minor Planet Electronic Circulars

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


<< DOU on 24 Oct. '07 >>  MPEC 2007-U70 - "06:10 UT" - Daily Orbit Update

Observers  on 24 October '07

Nine observing facilities appear in today's MPEC.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-U70 -- 2003 AE23
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2007-U70 -- 2007 PU11, 2002 RC118, 2212
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2007-U70 -- 2007 UV3
A35Hormersdorf Obs. in Germany, 1 in MPEC 2007-U70 -- 2007 LR32
704LINEAR in New Mexico, 2 in MPEC 2007-U70 -- 2007 TV24, 2007 PU11
B33Libbiano Obs. in Italy, 1 in MPEC 2007-U70 -- 2007 UD6
D21Shenton Park Obs. in Western Australia, 5 in MPEC 2007-U70 -- 2007 UT3, 2007 UT, 2007 UF6, 2007 TS19, 2007 TC66
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2007-U70 -- 2003 AE23, 2002 RC118, 52768, 3757
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2007-U70 -- 2007 UD6, 2007 TB23

Impact Risk Monitoring  on 24 October '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 UO6NEODyS13012031-2085131.51e-05-5.77-6.230NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2007/10/21.365 to 2007/10/23.364."
2007 UD6NEODyS13012058-2089521.19e-04-5.84-6.150NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2007/10/20.296 to 2007/10/23.292."
JPL Sentry13002058-2102511.2e-04-5.84-6.160JPL: "Analysis based on 44 observations spanning 2.9959 days (2007-Oct-20.29569 to 2007-Oct-23.29163)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2007 UT3NEODyS17032068-207857.29e-07-6.70-6.950NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2007/10/19.300 to 2007/10/23.668."
JPL Sentry13002062-207857.0e-07-6.73-6.960JPL: "Analysis based on 18 observations spanning 4.3683 days (2007-Oct-19.2989 to 2007-Oct-23.66722)." Diameter approximately 0.024 km. from mean, weighted H=25.7.
2007 TB23JPL Sentry1300R E M O V E DJPL: Risk listing removed at 1157 UTC.

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 October '07

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

1703Noted that NEODyS has updated its 2007 UT3 risk assessment - see above
1301Noted that NEODyS has updated its 2007 UD6 risk assessment - see above
1300Noted that JPL Sentry has removed 2007 TB23 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 UD6 risk assessment - see above
Noted that NEODyS has posted 2007 UO6 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 UT3 risk assessment - see above
Grabbed MPEC 2007-U70 - Daily Orbit Update - see above