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Contents  on 11 August '08

Resources:

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.

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NEOCP Activity  on 11 August '08

The MPC's NEO Confirmation Page has 1 listing: 1 new

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new listing. This was a "one nighter."

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

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New MPECs  on 11 August '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been six MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-P55 - "14:57 UT" - Observations of Comets


MPEC 2008-P54 - "14:41 UT" - Comet P/2008 O2 (McNaught)


MPEC 2008-P53 - "14:35 UT" - Comet C/2008 N1 (Holmes)


MPEC 2008-P52 - "14:30 UT" - Comet P/2008 L2 (Hill)


MPEC 2008-P51 - "14:23 UT" - Comet C/2007 U1 (LINEAR)


<< DOU on 11 Aug. '08 >>  MPEC 2008-P50 - "06:10 UT" - Daily Orbit Update

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Observers  on 11 August '08

A total of 56 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 7 in MPECs 2008-P51 & 2008-P55 -- C/2007 U1, C/2007 N3, C/2006 S3, C/2005 L3, 68P, 44P, 19P
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-P55 -- C/2007 W3
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPECs 2008-P50 & 2008-P53 -- 2008 PJ9, 2008 OV2, 2008 OS7, 2008 OQ8, 2008 OO1, 2008 OC9, 2008 OB9, C/2008 N1, 2008 MU1, 2008 JZ7
J51Atlante Obs. in the Canary Islands, 9 in MPEC 2008-P55 -- C/2007 W1, C/2007 N3, C/2006 W3, C/2006 OF2, C/2005 L3, 199P, 67P, 47P, 6P
E18BDI Obs. in New South Wales, 2 in MPEC 2008-P50 -- 2008 MZ, 2004 SD20
A81Balzaretto Obs. in Italy, 2 in MPEC 2008-P55 -- C/2007 N3, 6P
215Buchloe Obs. in Germany, 1 in MPEC 2008-P55 -- C/2007 W3
235CAST Obs. in Italy, 5 in MPEC 2008-P55 -- C/2007 N3, C/2005 L3, 199P, 68P, 6P
J79Calarreona Obs. in Spain, 2 in MPEC 2008-P55 -- C/2005 L3, 6P
J96Cantabria Obs. in Spain, 2 in MPEC 2008-P55 -- C/2007 W1, 67P
B20Carmelita Obs. in Spain, 5 in MPEC 2008-P55 -- C/2008 J1, C/2007 N3, C/2005 L3, 199P, 6P
A77Chante-Perdrix Obs. in France, 6 in MPECs 2008-P50 & 2008-P55 -- C/2005 L3, 3352, 199P, 68P, 14P, 6P
I31Cristo Rey Obs. in Argentina, 1 in MPEC 2008-P55 -- C/2008 A1
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-P55 -- C/2007 W1
372Geisei Obs. in Japan, 8 in MPECs 2008-P52, 2008-P53, 2008-P54 & 2008-P55 -- P/2008 O2, C/2008 N1, P/2008 L2, C/2008 J6, C/2008 J1, C/2007 W1, C/2007 N3, C/2007 K3
I30Geminis Austral Obs., 1 in MPEC 2008-P55 -- C/2007 N3
E94Gisborne Obs., 2 in MPEC 2008-P55 -- C/2007 N3, 197P
458Guadarrama Obs. in Spain, 1 in MPEC 2008-P55 -- 6P
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-P55 -- C/2008 J1, C/2005 L3, 6P
F84Hibiscus Obs. in Tahiti, 1 in MPEC 2008-P50 -- 2008 ON10
B15Inastars Obs. in Germany, 1 in MPEC 2008-P55 -- C/2008 J1
246KLENOT in the Czech Republic, 1 in MPEC 2008-P54 -- P/2008 O2
704LINEAR in New Mexico, 1 in MPEC 2008-P55 -- C/2007 W1
J38La Vara Obs. in Spain, 9 in MPECs 2008-P53 & 2008-P55 -- C/2008 N1, C/2008 J1, C/2007 W1, C/2007 N3, C/2006 W3, C/2006 OF2, C/2005 L3, 199P, 6P
J59Linceo Obs. in Spain, 2 in MPEC 2008-P55 -- C/2007 N3, 6P
844Los Molinos Obs. in Uruguay, 3 in MPEC 2008-P55 -- C/2007 N3, 47P, 6P
J40Malaga Obs. in Spain, 4 in MPEC 2008-P55 -- C/2007 N3, 199P, 67P, 6P
A02Masia Cal Maciarol Modul 8 (MCM8) in Spain, 4 in MPECs 2008-P52 & 2008-P55 -- P/2008 L2, C/2007 W1, 199P, 67P
232Masquefa Obs. in Spain, 8 in MPEC 2008-P55 -- C/2007 W1, C/2007 N3, C/2006 W3, C/2006 OF2, 199P, 67P, 47P, 6P
932McCarthy Obs. in Connecticut, 2 in MPEC 2008-P50 -- 2008 PF1, 2008 MR1
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2008-P50 -- 2004 SB56, 2000 RL77, 88263, 188452
118Modra Obs. in Slovakia, 1 in MPEC 2008-P53 -- C/2008 N1
213Montcabre Obs. in Spain, 1 in MPEC 2008-P55 -- 199P
945Monte Deva Obs. in Spain, 9 in MPEC 2008-P55 -- C/2008 J1, C/2007 W1, C/2007 N3, C/2006 W3, C/2006 OF2, C/2005 L3, 199P, 47P, 6P
900Moriyama Obs. in Japan, 7 in MPECs 2008-P53 & 2008-P55 -- C/2008 N1, C/2008 J6, C/2008 J1, C/2007 N3, 67P, 47P, 6P
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-P51 -- C/2007 U1
D81Nagano Obs., 1 in MPEC 2008-P55 -- C/2007 W1
J47Nazaret Obs. in Spain, 10 in MPECs 2008-P53 & 2008-P55 -- C/2008 N1, C/2007 W1, C/2007 N3, C/2007 K3, C/2005 L3, 199P, 67P, 51P, 47P, 6P
423North Ryde Obs. in New South Wales, 3 in MPECs 2008-P54 & 2008-P55 -- P/2008 O2, P/2008 J3, 197P
B69Owls & Ravens Obs. in Germany, 2 in MPEC 2008-P55 -- C/2008 J6, C/2008 J1
B49Paus Obs. in Spain, 2 in MPEC 2008-P55 -- C/2007 W1, 6P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 8 in MPECs 2008-P52, 2008-P53 & 2008-P55 -- C/2008 N1, P/2008 L2, C/2008 J6, C/2008 J1, C/2007 W1, C/2006 S3, C/2006 OF2, 6P
J53Posadas Obs. in Spain, 9 in MPECs 2008-P50, 2008-P54 & 2008-P55 -- P/2008 O2, C/2008 J1, C/2007 N3, C/2005 L3, 90403, 65690, 8567, 4179, 6P
H06RAS Obs. Mayhill in New Mexico, 2 in MPEC 2008-P55 -- C/2006 W3, C/2006 OF2
J41Raheny Obs. in Ireland, 3 in MPEC 2008-P50 -- 90403, 8567, 1917
428Reedy Creek Obs. in Queensland, 1 in MPEC 2008-P54 -- P/2008 O2
473Remanzacco Obs. in Italy, 1 in MPEC 2008-P55 -- C/2008 J5
204Schiaparelli Obs. in Italy, 9 in MPEC 2008-P55 -- C/2008 J5, P/2008 J2, C/2008 G1, C/2007 W3, C/2007 K3, 68P, 51P, 44P, 2P
B40Skylive Obs. in Italy, 1 in MPEC 2008-P55 -- 19P
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-P55 -- 2P
A97Stammersdorf Obs. in Austria, 1 in MPEC 2008-P55 -- C/2007 W1
147Suno Obs. in Italy, 2 in MPECs 2008-P52 & 2008-P53 -- C/2008 N1, P/2008 L2
H53Thompsonville Obs. in Illinois, 5 in MPEC 2008-P50 -- 188452, 164400, 11398, 8567, 4179
J70Vega del Thader Obs. in Spain, 5 in MPEC 2008-P55 -- P/2008 J2, C/2007 N3, C/2005 L3, 199P, 6P
H47Vicksburg Obs. in Mississippi, 4 in MPEC 2008-P55 -- C/2007 W1, C/2007 N3, 68P, 6P
B42Vitebsk Obs. in Belarus, 8 in MPECs 2008-P50, 2008-P52 & 2008-P55 -- P/2008 L2, C/2008 J1, C/2007 W1, C/2006 W3, C/2006 OF2, 8567, 26P, 14P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

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Impact Risk Monitoring  on 11 August '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is 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.
0000NNN000

Object
Risk
Monitor		When
Noted
UTC		0000T0000
Year
Range
VI
#		000NN00
Prob
Cum		T0000
PS
Cum		T0000
PS
Max
T
S

Notes for Today's Latest Risk Assessments
2008 PJ9JPL Sentry13592067-207131.5e-07-5.29-5.300JPL: "Analysis based on 21 observations spanning 2.6966 days (2008-Aug-06.59348 to 2008-Aug-09.29006)." Diameter approximately 0.150 km. from mean, weighted H=21.7.
NEODyS13592063-207141.31e-07-5.36-5.360NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/08/06.594 to 2008/08/09.291."
2008 OB9JPL Sentry1359210622.7e-08-3.97-4.090JPL: "Analysis based on 23 observations spanning 10.855 days (2008-Jul-29.34054 to 2008-Aug-09.19515)." Diameter approximately 1.200 km. from mean, weighted H=17.3.
NEODyS1359R E M O V E D-
2008 OO1JPL Sentry1359210712.7e-07-6.63-6.630JPL: "Analysis based on 39 observations spanning 13.684 days (2008-Jul-26.55201 to 2008-Aug-09.23622)." Diameter approximately 0.041 km. from mean, weighted H=24.6.

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.

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Chronology  on 11 August '08

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

2357The NEOCP has become active
1604Grabbed MPEC 2008-P55 - Observations of Comets - see above
1508Grabbed MPEC 2008-P51 - Comet C/2007 U1 (LINEAR) - see above
Grabbed MPEC 2008-P52 - Comet P/2008 L2 (Hill) - see above
Grabbed MPEC 2008-P53 - Comet C/2008 N1 (Holmes) - see above
Grabbed MPEC 2008-P54 - Comet P/2008 O2 (McNaught) - see above
1359Noted that JPL Sentry has updated its 2008 OB9 risk assessment - see above
Noted that NEODyS has removed 2008 OB9 as an impact risk - see above
Noted that JPL Sentry has reposted 2008 OO1 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 PJ9 risk assessment - see above
Noted that NEODyS has updated its 2008 PJ9 risk assessment - see above
Grabbed MPEC 2008-P50 - Daily Orbit Update - see above