Contents  on 25 October '07

Resources:

NEOCP Activity  on 25 October '07

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." The Tracking News counted a total of seven objects listed on the NEOCP at some point on this day.

New MPECs  on 25 October '07

Minor Planet Electronic Circulars

There was one MPEC issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 25 Oct. '07 >>  MPEC 2007-U71 - "06:11 UT" - Daily Orbit Update

Observers  on 25 October '07

Nineteen observing facilities appeared in this day's MPEC.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2007-U71 -- 2007 TR24
H55Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2007-U71 -- 2007 UX1, 2007 UV3, 2007 UU3, 2007 UH, 2007 TW68, 2007 TC23, 2007 SS1, 2007 RZ19
300Bisei Spaceguard Center (Bisei) in Japan, 2 in MPEC 2007-U71 -- 2001 QC34, 162173
703Catalina Sky Survey in Arizona, 1 in MPEC 2007-U71 -- 2007 TV24
448Desert Moon Obs. in New Mexico, 11 in MPEC 2007-U71 -- 2007 UX1, 2007 UV3, 2007 UH, 2007 TX18, 2007 TV24, 2007 TR24, 2007 TH1, 2007 TE66, 2007 TB23, 2007 SE11, 2007 RU10
143Gnosca Obs. in Switzerland, 1 in MPEC 2007-U71 -- 2007 UT
J95Great Shefford Obs. in England, 1 in MPEC 2007-U71 -- 2007 UG6
H51Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-U71 -- 2007 UG6, 2007 TS19, 2007 LR32
355Hadano Obs. in Japan, 3 in MPEC 2007-U71 -- 2007 RF5, 2007 PU11, 2007 LR32
704LINEAR in New Mexico, 21 in MPEC 2007-U71 -- 2007 UW3, 2007 UV3, 2007 US6, 2007 UP6, 2007 TK8, 2007 TG15, 2004 VV, 2002 UR3, 68063, 18736, 16636, 162273, 153591, 143678, 11500, 105140, 8176, 4954, 3553, 3200, 1862
699LONEOS in Arizona, 2 in MPEC 2007-U71 -- 2007 SE11, 2007 RU12
A70Lumijoki Obs. in Finland, 1 in MPEC 2007-U71 -- 2007 TC14
J40Malaga Obs. in Spain, 1 in MPEC 2007-U71 -- 2007 PU11
G96Mt. Lemmon Survey (MLS) in Arizona, 19 in MPEC 2007-U71 -- 2007 UW1, 2007 UV3, 2007 UT, 2007 US3, 2007 UG6, 2007 UB6, 2007 TY18, 2007 TV68, 2007 TS19, 2007 TR24, 2007 TL23, 2007 TH1, 2007 TG8, 2007 TE66, 2007 TD14, 2007 TB23, 2007 RU12, 2007 RD20, 2003 UB10
D21Shenton Park Obs. in Western Australia, 2 in MPEC 2007-U71 -- 2007 UV3, 2007 TB23
E12Siding Spring Survey in New South Wales, 1 in MPEC 2007-U71 -- 2007 TD71
691Spacewatch 0.9m telescope in Arizona, 14 in MPEC 2007-U71 -- 2007 UR3, 2007 UH, 2007 TW68, 2007 TV24, 2007 TO74, 2007 TK15, 2007 TH19, 2007 TG25, 2007 RQ133, 2006 RJ1, 2002 XR14, 85628, 163051, 136795
291Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2007-U71 -- 2007 TH19, 2007 TA25
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2007-U71 -- 2007 UP6

Impact Risk Monitoring  on 25 October '07

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2355 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 UW1NEODyS16582048-2090514.67e-05-3.57-4.230NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2007/10/17.443 to 2007/10/24.524."
JPL Sentry12522048-2107907.6e-05-3.38-4.250JPL: "Analysis based on 32 observations spanning 7.0807 days (2007-Oct-17.44246 to 2007-Oct-24.52312)." Diameter approximately 0.099 km. from mean, weighted H=22.7.
2007 TD71NEODyS14362066-2081107.35e-08-3.65-3.890NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2007/10/13.703 to 2007/10/22.713."
JPL Sentry12522066-208166.0e-08-3.74-3.960JPL: "Analysis based on 39 observations spanning 9.0102 days (2007-Oct-13.70201 to 2007-Oct-22.71222)." Diameter approximately 0.720 km. from mean, weighted H=18.4.
2007 TC14NEODyS1658208211.24e-07-5.33-5.330NEODyS: "Based on 137 optical observations (of which 0 are rejected as outliers) from 2007/10/08.391 to 2007/10/16.872."
JPL Sentry1402208211.2e-07-5.35-5.350JPL: "Analysis based on 137 observations spanning 8.4810 days (2007-Oct-08.39044 to 2007-Oct-16.87145)." Diameter approximately 0.130 km. from mean, weighted H=22.1.

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 25 October '07

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

1658Noted that NEODyS has updated its 2007 TC14 risk assessment - see above
Noted that NEODyS has updated its 2007 UW1 risk assessment - see above
1436Noted that NEODyS has updated its 2007 TD71 risk assessment - see above
1402Noted that JPL Sentry has reposted 2007 TC14 as an impact risk - see above
1252Noted that JPL Sentry has updated its 2007 TD71 risk assessment - see above
Noted that JPL Sentry has updated its 2007 UW1 risk assessment - see above
Grabbed MPEC 2007-U71 - Daily Orbit Update - see above