Contents  on 21 October '07


Note: Marching toward complete automation, we inaugurated on October 18th an RSS news feed RSS news feed that is generated from the same scripts used to produce these daily news pages, replacing previously manual RSS creation. This provides faster and more complex (and surer) linking to both the related A/CC news items and, when available, now also to the original documents. And so this means not only an RSS news feed for A/CC reporting but also for MPECs and active risk assessments. Additionally, this change allows providing an alternate RSS news feed RSS feed for daily news as published on A/CC's backup Web site.

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 21 October '07

The MPC's NEO Confirmation Page has 17 listings: 3 new, 14 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and fourteen updated listings. Of these, ten were "one nighters."

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 21 October '07

Minor Planet Electronic Circulars

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

MPEC 2007-U45 - "23:26 UT" - Comet P/2007 T6 (Catalina)

<< DOU on 21 Oct. '07 >>  MPEC 2007-U44 - "06:09 UT" - Daily Orbit Update

Observers  on 21 October '07

A total of 21 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2007-U45 -- P/2007 T6
H55Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2007-U44 -- 2007 UW3, 2007 UV3, 2007 UU3, 2007 US3, 2007 UR3
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2007-U44 -- 2007 TS19, 2007 PU11
448Desert Moon Obs. in New Mexico, 6 in MPEC 2007-U44 -- 2007 TL23, 2007 TG15, 2007 TD14, 2007 RX19, 2007 PR9, 2001 SW269
B23Fiamene Obs. in Italy, 2 in MPEC 2007-U44 -- 2007 DA41, 2004 VV
H51Greiner Research Obs. in Wisconsin, 2 in MPEC 2007-U44 -- 2007 TS19, 2007 RU12
A17Guidestar Obs. in Germany, 1 in MPEC 2007-U44 -- 2007 TM15
701Junk Bond Obs. in Arizona, 1 in MPEC 2007-U44 -- 2007 UV3
246KLENOT in the Czech Republic, 1 in MPEC 2007-U44 -- 2007 TC23
585Kiev Comet Station in the Ukraine, 1 in MPEC 2007-U45 -- P/2007 T6
704LINEAR in New Mexico, 11 in MPEC 2007-U44 -- 2007 UY1, 2007 UV3, 2007 UT3, 2007 US3, 2007 TU18, 2007 TS19, 164216, 162215, 162173, 4954, 3671
B33Libbiano Obs. in Italy, 1 in MPEC 2007-U44 -- 2002 UR3
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2007-U44 -- 2007 TE66, 2007 RT147, 20429
J47Nazaret Obs. in Spain, 1 in MPEC 2007-U45 -- P/2007 T6
A24New Millennium Obs. in Italy, 17 in MPEC 2007-U44 -- 2007 TG8, 2007 TG15, 2007 RF5, 2007 PU11, 2007 LR32, 2005 SG, 2002 UR3, 2002 RC118, 2001 RY47, 85770, 22771, 20826, 152787, 143678, 3553, 2212, 1865
J69North Obs. in England, 1 in MPEC 2007-U44 -- 2007 PU11
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2007-U45 -- P/2007 T6
204Schiaparelli Obs. in Italy, 1 in MPEC 2007-U45 -- P/2007 T6
691Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2007-U44 -- 2002 RC118, 4486, 2212
291Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2007-U44 -- 2007 TY24, 2007 TS68, 2007 TA25, 1999 SO5
G72University Hills Obs. in southern California, 2 in MPEC 2007-U44 -- 2007 TS19, 2007 RF5

Impact Risk Monitoring  on 21 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 UT3JPL Sentry14382011-21056779.4e-05-3.63-3.770JPL: "Analysis based on 9 observations spanning 1.0804 days (2007-Oct-19.2989 to 2007-Oct-20.37927)." Diameter approximately 0.025 km. from mean, weighted H=25.7.
2007 UY1JPL Sentry14382045-2107139.2e-08-6.44-6.910JPL: "Analysis based on 29 observations spanning 1.9560 days (2007-Oct-18.14415 to 2007-Oct-20.10014)." Diameter approximately 0.090 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 21 October '07

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

2354Grabbed MPEC 2007-U45 - Comet P/2007 T6 (Catalina) - see above
1439Grabbed MPEC 2007-U44 - Daily Orbit Update - see above
1438Noted that JPL Sentry has posted 2007 UT3 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