Contents  on 26 October '07


NEOCP Activity  on 26 October '07

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of five 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 26 October '07

Minor Planet Electronic Circulars

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

MPEC 2007-U78 - "15:38 UT" - PHAs

MPEC 2007-U77 - "15:38 UT" - Unusual Minor Planets

MPEC 2007-U76 - "15:38 UT" - Amors

MPEC 2007-U75 - "15:38 UT" - Atens and Apollos

MPEC 2007-U74 - "15:33 UT" - Distant Minor Planets

MPEC 2007-U73 - "15:05 UT" - Observable Comets

<< DOU on 26 Oct. '07 >>  MPEC 2007-U72 - "06:07 UT" - Daily Orbit Update

Observers  on 26 October '07

Four observing facilities appear in today's MPEC.

CodeObserver / observatory
448Desert Moon Obs. in New Mexico, 2 in MPEC 2007-U72 -- 2007 SV11, 2007 PA8
H51Greiner Research Obs. in Wisconsin, 3 in MPEC 2007-U72 -- 2007 SP6, 2007 SE11, 2007 PU11
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2007-U72 -- 2007 UY1, 2007 SV11, 2004 RD252, 2003 HW11
A24New Millennium Obs. in Italy, 2 in MPEC 2007-U72 -- 2007 TG15, 137084

Impact Risk Monitoring  on 26 October '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.





Notes for Today's Latest Risk Assessments
2007 UY1NEODyS1231208511.18e-07-6.30-6.300NEODyS: "Based on 34 optical observations (of which 1 are rejected as outliers) from 2007/10/18.145 to 2007/10/25.192."
JPL Sentry12302084-2107204.2e-07-5.80-6.230JPL: "Analysis based on 33 observations spanning 7.0471 days (2007-Oct-18.14415 to 2007-Oct-25.19127)." Diameter approximately 0.089 km. from mean, weighted H=22.9.

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 26 October '07

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

1653Grabbed MPEC 2007-U73 - Observable Comets - see above
Grabbed MPEC 2007-U74 - Distant Minor Planets - see above
Grabbed MPEC 2007-U75 - Atens and Apollos - see above
Grabbed MPEC 2007-U76 - Amors - see above
Grabbed MPEC 2007-U77 - Unusual Minor Planets - see above
Grabbed MPEC 2007-U78 - PHAs - see above
1230Noted that JPL Sentry has updated its 2007 UY1 risk assessment - see above
Noted that NEODyS has reposted 2007 UY1 as an impact risk - see above
Grabbed MPEC 2007-U72 - Daily Orbit Update - see above