Contents  on 22 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 the copy of the daily news 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 22 October '07

The MPC's NEO Confirmation Page has 7 listings: 1 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and six updated listings. Of these, five were "one nighters." So far The Tracking News has counted a total of seventeen 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 22 October '07

Minor Planet Electronic Circulars

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

MPEC 2007-U54 - "19:33 UT" - Comet C/2007 T5 (Gibbs)

MPEC 2007-U53 - "15:29 UT" - Comet C/2007 U1 (LINEAR)

MPEC 2007-U52 - "14:34 UT" - 2007 UG6

MPEC 2007-U51 - "14:32 UT" - 2007 UF6

MPEC 2007-U50 - "14:29 UT" - 2007 UE6

MPEC 2007-U49 - "14:23 UT" - 2007 UD6

MPEC 2007-U48 - "14:19 UT" - 2007 UC6

MPEC 2007-U47 - "14:14 UT" - 2007 UB6

<< DOU on 22 Oct. '07 >>  MPEC 2007-U46 - "06:11 UT" - Daily Orbit Update

Observers  on 22 October '07

A total of 26 observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 12 in MPECs 2007-U46, 2007-U48, 2007-U49 & 2007-U53 -- 2007 UH, 2007 UD6, 2007 UC6, C/2007 U1, 2007 TZ18, 2007 TY24, 2007 TV68, 2007 TV24, 2007 TU68, 2007 TO74, 2007 TH72, 2007 TE66
413Australian Natl. Univ. 1m telescope in New South Wales, 2 in MPECs 2007-U53 & 2007-U54 -- C/2007 U1, C/2007 T5
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2007-U49 & 2007-U52 -- 2007 UG6, 2007 UD6
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2007-U53 -- C/2007 U1
448Desert Moon Obs. in New Mexico, 6 in MPEC 2007-U46 -- 2007 UH, 2007 TV24, 2007 TR65, 2007 TK8, 2007 TG25, 162215
734Farpoint Obs. in Kansas, 1 in MPEC 2007-U49 -- 2007 UD6
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2007-U49 -- 2007 UD6
143Gnosca Obs. in Switzerland, 2 in MPECs 2007-U49 & 2007-U52 -- 2007 UG6, 2007 UD6
651Grasslands Obs. in Arizona, 3 in MPECs 2007-U47, 2007-U48 & 2007-U49 -- 2007 UD6, 2007 UC6, 2007 UB6
A17Guidestar Obs. in Germany, 1 in MPEC 2007-U49 -- 2007 UD6
701Junk Bond Obs. in Arizona, 2 in MPECs 2007-U47 & 2007-U53 -- 2007 UB6, C/2007 U1
585Kiev Comet Station in the Ukraine, 1 in MPEC 2007-U54 -- C/2007 T5
704LINEAR in New Mexico, 11 in MPECs 2007-U46, 2007-U47 & 2007-U53 -- 2007 UB6, C/2007 U1, 2007 TS19, 2007 RF5, 2007 PU11, 2002 RC118, 66251, 162004, 105140, 2212, 1865
B33Libbiano Obs. in Italy, 1 in MPEC 2007-U53 -- C/2007 U1
A80Lindenberg Obs. in Germany, 5 in MPECs 2007-U46 & 2007-U53 -- C/2007 U1, 2007 PU11, 2007 GS3, 2005 SG, 2002 RC118
932McCarthy Obs. in Connecticut, 1 in MPEC 2007-U49 -- 2007 UD6
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2007-U46, 2007-U48, 2007-U50 & 2007-U51 -- 2007 UF6, 2007 UE6, 2007 UC6, 2007 TS19, 2007 SR1, 1997 ET30, 18736, 162723
A24New Millennium Obs. in Italy, 15 in MPEC 2007-U46 -- 2007 TG8, 2007 TG15, 2007 RF5, 2007 PU11, 2007 LR32, 2002 UR3, 2002 RC118, 2001 RY47, 85770, 22771, 20826, 152787, 143678, 3553, 2212
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 15 in MPEC 2007-U46 -- 2007 UX1, 2007 TX18, 2007 TS19, 2007 RU12, 2007 RT19, 2007 RF5, 2007 PU11, 2007 LR32, 2007 DL41, 2005 SG, 2002 UA31, 2002 RC118, 2001 RY47, 152787, 2212
D29Purple Mtn. Obs. XuYi Station in China, 2 in MPEC 2007-U46 -- 2007 PU11, 11500
473Remanzacco Obs. in Italy, 2 in MPECs 2007-U49 & 2007-U53 -- 2007 UD6, C/2007 U1
B04Saint-Barthelemy Obs. in Italy, 1 in MPEC 2007-U52 -- 2007 UG6
204Schiaparelli Obs. in Italy, 4 in MPECs 2007-U49, 2007-U52, 2007-U53 & 2007-U54 -- 2007 UG6, 2007 UD6, C/2007 U1, C/2007 T5
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2007-U46 -- 2007 TD71, 2007 TA19, 2007 RA9, 66959, 7889
F85Tiki Obs. in Tahiti, 1 in MPEC 2007-U46 -- 2007 UU3
B39Tradate Obs. in Italy, 1 in MPEC 2007-U46 -- 2007 PU11

Impact Risk Monitoring  on 22 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 UD6JPL Sentry18102058-2096481.1e-04-5.85-6.170JPL: "Analysis based on 36 observations spanning 1.5776 days (2007-Oct-20.29569 to 2007-Oct-21.87327)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2007 UT3NEODyS12542011-20871091.68e-04-3.13-3.160NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2007/10/19.300 to 2007/10/20.380."
JPL Sentry02022009-21072301.7e-04-3.07-3.090JPL: "Analysis based on 13 observations spanning 1.0804 days (2007-Oct-19.2989 to 2007-Oct-20.37927)." Diameter approximately 0.026 km. from mean, weighted H=25.6.
2007 TH72NEODyS1254208715.15e-09-8.06-8.060NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2007/10/15.204 to 2007/10/20.289."
JPL Sentry1253209616.9e-09-7.97-7.970JPL: "Analysis based on 30 observations spanning 5.0852 days (2007-Oct-15.20289 to 2007-Oct-20.288119)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2007 TD71NEODyS12542060-2090122.53e-07-3.10-3.650NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2007/10/13.703 to 2007/10/21.660."
JPL Sentry12532060-2107142.4e-07-3.12-3.650JPL: "Analysis based on 20 observations spanning 7.9573 days (2007-Oct-13.70201 to 2007-Oct-21.65936)." Diameter approximately 0.720 km. from mean, weighted H=18.4.

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 22 October '07

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

1959Grabbed MPEC 2007-U54 - Comet C/2007 T5 (Gibbs) - see above
1810Noted that JPL Sentry has posted 2007 UD6 as an impact risk - see above
1559Grabbed MPEC 2007-U53 - Comet C/2007 U1 (LINEAR) - see above
1516Grabbed MPEC 2007-U47 - 2007 UB6 - see above
Grabbed MPEC 2007-U48 - 2007 UC6 - see above
Grabbed MPEC 2007-U49 - 2007 UD6 - see above
Grabbed MPEC 2007-U50 - 2007 UE6 - see above
Grabbed MPEC 2007-U51 - 2007 UF6 - see above
Grabbed MPEC 2007-U52 - 2007 UG6 - see above
1254Noted that NEODyS has updated its 2007 TD71 risk assessment - see above
Noted that NEODyS has updated its 2007 TH72 risk assessment - see above
Grabbed MPEC 2007-U46 - Daily Orbit Update - see above
1253Noted that JPL Sentry has updated its 2007 TD71 risk assessment - see above
Noted that JPL Sentry has updated its 2007 TH72 risk assessment - see above
Noted that NEODyS has posted 2007 UT3 as an impact risk - see above
0202Noted that JPL Sentry has updated its 2007 UT3 risk assessment - see above