Contents  on 26 October '09


The latest A/CC news is available via framed access, RSS news feed RSS news feed, or redirection. - Note: A/CC has a main Web site and also a backup site with its own duplicate 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 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 26 October '09

The MPC's NEO Confirmation Page has 8 listings: 1 new, 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of fourteen listings on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object at Suno Observatory by Birtwhistle et al.

New MPECs  on 26 October '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-U105 - "18:41 UT" - 2009 UL20

MPEC 2009-U104 - "18:18 UT" - 2009 UK20

<< DOU on 26 Oct. '09 >>  MPEC 2009-U103 - "06:10 UT" - Daily Orbit Update

MPEC 2009-U102 - "03:03 UT" - Comet C/2009 S3 (Lemmon)

Observers  on 26 October '09

A total of 20 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 2 in MPEC 2009-U103 -- 2009 UP5, 2009 UP1
H55Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2009-U103 -- 2009 UP5, 2009 UO3, 2009 UD19, 2009 UC19
160Castelmartini Obs. in Italy, 7 in MPEC 2009-U103 -- 2009 UO3, 54401, 17511, 17274, 16834, 143678, 3361
703Catalina Sky Survey (CSS) in Arizona, 15 in MPEC 2009-U103 -- 2009 UP1, 2009 UD19, 2009 KM7, 2007 DA41, 2001 UW16, 2000 CO101, 99248, 217683, 216689, 17274, 143678, 6239, 5693, 5653, 1865
850Cordell-Lorenz Obs. in Tennessee, 2 in MPEC 2009-U103 -- 2009 UX17, 2009 UV18
448Desert Moon Obs. in New Mexico, 1 in MPEC 2009-U103 -- 2009 SC229
J95Great Shefford Obs. in England, 3 in MPEC 2009-U103 -- 2009 UZ19, 2009 UY19, 2009 UV18
704LINEAR in New Mexico, 4 in MPEC 2009-U103 -- 2009 TA1, 143487, 3988, 1943
J75La Sagra Obs. in Spain, 2 in MPEC 2009-U103 -- 2009 TK8, 2009 RN
B33Libbiano Obs. in Italy, 2 in MPEC 2009-U103 -- 2009 UZ19, 2009 US19
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-U103, 2009-U104 & 2009-U105 -- 2009 UW18, 2009 UV18, 2009 UL20, 2009 UK20
B28Mandi Obs. in Italy, 1 in MPEC 2009-U103 -- 2009 UY19
G96Mt. Lemmon Survey (MLS) in Arizona, 7 in MPECs 2009-U102, 2009-U103 & 2009-U105 -- 2009 UV18, 2009 UL20, 2009 UK, 2009 UD2, C/2009 S3, 2005 RQ6, 8201
H45Petit Jean Mtn. South Obs. in Arkansas, 1 in MPEC 2009-U103 -- 2009 UV18
204Schiaparelli Obs. in Italy, 3 in MPECs 2009-U102 & 2009-U103 -- 2009 UY19, 2009 UV18, C/2009 S3
691Spacewatch 0.9m telescope in Arizona, 9 in MPECs 2009-U103 & 2009-U104 -- 2009 UQ5, 2009 UK20, 2009 TL4, 2007 DA41, 2005 UK1, 2001 UW16, 162038, 154244, 1862
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2009-U103, 2009-U104 & 2009-U105 -- 2009 UW18, 2009 UT19, 2009 UL20, 2009 UL, 2009 UK20, 2009 UJ14, 2009 UF, 2009 UD2, 2009 TG10, 2009 RV1, 2000 AX93
926Tenagra II Obs. in Arizona, 2 in MPEC 2009-U103 -- 2009 UV18, 2009 UR5
J35Tucci Obs. in Spain, 1 in MPEC 2009-U103 -- 3552
C00Velikie Luki Obs. in Russia, 1 in MPEC 2009-U103 -- 2009 NA
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 October '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of risk-listed objects under current observation.
The time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
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
2009 UL20JPL Sentry23582057-2107192.6e-08-7.27-8.090JPL: "Analysis based on 20 observations spanning .97806 days (2009-Oct-25.23483 to 2009-Oct-26.21289)." Diameter approximately 0.054 km. from mean, weighted H=24.0.
2009 UW18JPL Sentry1347R E M O V E DJPL: Risk listing removed at 0852 UTC.
NEODyS1347R E M O V E D-
2009 UV18JPL Sentry13472020-210082.1e-09-4.07-4.470JPL: "Analysis based on 76 observations spanning 3.7490 days (2009-Oct-22.39951 to 2009-Oct-26.14849)." Diameter approximately 2.000 km. from mean, weighted H=16.1.
NEODyS1347R E M O V E D-

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 '09

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

2358Noted that JPL Sentry has posted 2009 UL20 as an impact risk - see above
1900Grabbed MPEC 2009-U104 - 2009 UK20 - see above
Grabbed MPEC 2009-U105 - 2009 UL20 - see above
1348Grabbed MPEC 2009-U103 - Daily Orbit Update - see above
1347Noted that JPL Sentry has updated its 2009 UV18 risk assessment - see above
Noted that NEODyS has removed 2009 UV18 as an impact risk - see above
Noted that JPL Sentry has removed 2009 UW18 as an impact risk - see above
Noted that NEODyS has removed 2009 UW18 as an impact risk - see above
0416Grabbed MPEC 2009-U102 - Comet C/2009 S3 (Lemmon) - see above