Contents  on 28 October '07


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 28 October '07

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

When last checked at 2343 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four updated listings.

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 28 October '07

Minor Planet Electronic Circulars

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

<< DOU on 28 Oct. '07 >>  MPEC 2007-U80 - "06:06 UT" - Daily Orbit Update

Observers  on 28 October '07

Four observing facilities appear in today's MPEC.

CodeObserver / observatory
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2007-U80 -- 2007 UY1
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPEC 2007-U80 -- 2007 TX18, 2007 TK8, 2007 TG25, 2007 TG15, 2007 TB23, 2007 SV11, 2007 SJ, 2007 PP9
A24New Millennium Obs. in Italy, 1 in MPEC 2007-U80 -- 2007 TG15
E12Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2007-U80 -- 2007 TR24, 2007 TD71, 2007 TC66, 2007 TA19

Impact Risk Monitoring  on 28 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 UY1JPL Sentry11172097-210722.4e-09-8.03-8.110JPL: "Analysis based on 38 observations spanning 9.0080 days (2007-Oct-18.14415 to 2007-Oct-27.15213)." Diameter approximately 0.092 km. from mean, weighted H=22.8.
2007 TD71NEODyS1117R E M O V E D
JPL Sentry1117R E M O V E DJPL: Risk listing removed at 1009 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 28 October '07

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

1117Noted that JPL Sentry has removed 2007 TD71 as an impact risk - see above
Noted that NEODyS has removed 2007 TD71 as an impact risk - see above
Noted that JPL Sentry has updated its 2007 UY1 risk assessment - see above
Noted that NEODyS has removed 2007 UY1 as an impact risk - see above
Grabbed MPEC 2007-U80 - Daily Orbit Update - see above