Contents  on 20 October '09

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.

Radar Astrometry  on 20 October '09

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1909 UTC when the database was dated 20 Oct.

NEOCP Activity  on 20 October '09

The MPC's NEO Confirmation Page has 3 listings: 3 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new listings. All of these were "one nighters." So far The Tracking News has counted a total of six 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 20 October '09

Minor Planet Electronic Circulars

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


MPEC 2009-U54 - "21:21 UT" - Comet P/2009 S1 (Gibbs)


MPEC 2009-U53 - "15:55 UT" - 2009 UO3


MPEC 2009-U52 - "15:26 UT" - 2009 UN3


MPEC 2009-U51 - "15:10 UT" - 2009 UM3


<< DOU on 20 Oct. '09 >>  MPEC 2009-U50 - "06:11 UT" - Daily Orbit Update

Observers  on 20 October '09

A total of 33 observing facilities appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 152664
H55Astronomical Research Obs. (ARO) in Illinois, 46 in MPEC 2009-U50 -- 2009 UQ, 2009 UP1, 2009 UK, 2009 UJ, 2009 UG, 2009 UF, 2009 UD2, 2009 UD, 2009 UC, 2009 TT, 2009 TQ8, 2009 TP, 2009 TO8, 2009 TN8, 2009 TK8, 2009 TJ4, 2009 TF8, 2009 TF10, 2009 TE10, 2009 SW171, 2009 SV171, 2009 SU104, 2009 SS104, 2009 SQ, 2009 SM103, 2009 SM, 2009 SJ2, 2009 SG18, 2009 SG, 2009 SC229, 2009 SB, 2009 RT1, 2009 RN, 2009 RM, 2009 RD1, 2009 QT, 2009 QS, 2009 QR8, 2009 QL8, 2009 QL32, 2009 QF31, 2009 QD34, 2009 QB35, 2009 NH, 2005 XL80, 152664
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-U50 -- 2009 TQ8
B75Betelgeuse Station in Italy, 6 in MPEC 2009-U50 -- 2009 TK8, 2009 ST19, 2009 SM103, 2009 NA, 2009 KC3, 3200
127Bornheim Obs. in Germany, 8 in MPEC 2009-U50 -- 2009 KC3, 2002 NP1, 17274, 16834, 163697, 138883, 1943, 433
703Catalina Sky Survey (CSS) in Arizona, 19 in MPECs 2009-U50 & 2009-U53 -- 2009 UO3, 2009 SM103, 2009 QG34, 2009 ML1, 2006 AO4, 2005 SG19, 2004 XM35, 2003 UB10, 1998 MR24, 85628, 54401, 218863, 20826, 17274, 16834, 143678, 137805, 136617, 1865
B50Corner Obs. in Germany, 1 in MPEC 2009-U50 -- 433
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-U51 -- 2009 UM3
151Eschenberg Obs. in Switzerland, 3 in MPEC 2009-U50 -- 2009 UQ, 2009 TK12, 2009 SM103
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 152664
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2009-U54 -- P/2009 S1
A17Guidestar Obs. in Germany, 1 in MPEC 2009-U50 -- 54660
379Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2009-U50 -- 2009 ST19, 2009 SM103, 2009 RN, 2009 KC3, 2005 RQ6, 3200
240Herrenberg Obs. in Germany, 2 in MPEC 2009-U50 -- 54401, 185716
B15Inastars Obs. in Germany, 1 in MPEC 2009-U50 -- 9202
585Kiev Comet Station in the Ukraine, 1 in MPEC 2009-U54 -- P/2009 S1
704LINEAR in New Mexico, 9 in MPECs 2009-U50 & 2009-U51 -- 2009 UM3, 2009 TM10, 2009 SW, 2009 OC, 2008 JO, 2005 RQ6, 2003 UL12, 85709, 218863
J75La Sagra Obs. in Spain, 8 in MPEC 2009-U50 -- 2009 TA1, 2009 SM, 2009 QH2, 38091, 220909, 16816, 154244, 3288
B33Libbiano Obs. in Italy, 2 in MPECs 2009-U50 & 2009-U51 -- 2009 UM3, 2009 UJ
844Los Molinos Obs. in Uruguay, 1 in MPEC 2009-U51 -- 2009 UM3
560Madonna di Dossobuono Obs. in Italy, 5 in MPEC 2009-U50 -- 2009 UQ, 2009 SG, 2009 MC9, 159402, 433
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2009-U51 & 2009-U53 -- 2009 UO3, 2009 UM3
B67Mirasteilas Obs. in Switzerland, 5 in MPEC 2009-U50 -- 2009 TK8, 2009 RM, 154244, 6239, 3288
900Moriyama Obs. in Japan, 2 in MPECs 2009-U53 & 2009-U54 -- 2009 UO3, P/2009 S1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2009-U50 -- 2009 ST, 2009 RB4
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPECs 2009-U50 & 2009-U54 -- 2009 TK12, 2009 SM103, 2009 SG2, 2009 SC229, P/2009 S1, 2009 HV44
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-U51 & 2009-U53 -- 2009 UO3, 2009 UM3
H36Sandlot Obs. in Kansas, 1 in MPEC 2009-U53 -- 2009 UO3
D21Shenton Park Obs. in Western Australia, 1 in MPEC 2009-U53 -- 2009 UO3
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-U50 & 2009-U52 -- 2009 UW2, 2009 UN3
291Spacewatch 1.8m telescope in Arizona, 16 in MPEC 2009-U50 -- 2009 UK, 2009 UF2, 2009 UD2, 2009 TS7, 2009 TG8, 2009 TE10, 2009 TC8, 2009 SW19, 2009 SV17, 2009 SS172, 2009 SB, 2009 RV1, 2004 YR32, 2003 KN18, 2000 AD6, 1996 EO
926Tenagra II Obs. in Arizona, 3 in MPEC 2009-U50 -- 2009 TO8, 2009 TG8, 2009 TF8
A48Verona Obs. in Italy, 2 in MPEC 2009-U50 -- 2009 UQ, 2009 SG2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 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.
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
2009 UN3JPL Sentry1700205611.7e-10-5.82-5.820JPL: "Analysis based on 8 observations spanning .91994 days (2009-Oct-19.59856 to 2009-Oct-20.5185)." Diameter approximately 1.000 km. from mean, weighted H=17.6.
2009 UF2NEODyS15022052-207931.18e-08-7.68-7.740NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2009/10/18.223 to 2009/10/20.169."
JPL Sentry15012037-207931.2e-08-7.49-7.530JPL: "Analysis based on 11 observations spanning 1.9453 days (2009-Oct-18.22265 to 2009-Oct-20.16798)." Diameter approximately 0.046 km. from mean, weighted H=24.3.
2009 UD2JPL Sentry1501R E M O V E DJPL: Risk listing removed at 1034 UTC.
2009 UEJPL Sentry2000R E M O V E DJPL: Risk listing removed at 1951 UTC.
2009 TE10NEODyS1501R E M O V E D-
JPL Sentry1501R E M O V E DJPL: Risk listing removed at 1035 UTC.
2009 TQ8NEODyS1501R E M O V E D-
JPL Sentry1501R E M O V E DJPL: Risk listing removed at 1035 UTC.
2009 TO8JPL Sentry1501R E M O V E DJPL: Risk listing removed at 1031 UTC.
2009 TM8JPL Sentry22022079-21091076.6e-05-6.26-7.380JPL: "Analysis based on 48 observations spanning 2.2516 days (2009-Oct-15.2109 to 2009-Oct-17.46255)." Diameter approximately 0.007 km. from mean, weighted H=28.6.
2009 TH8JPL Sentry20002068-210049.1e-06-5.18-5.300JPL: "Analysis based on 41 observations spanning 3.9348 days (2009-Oct-14.54405 to 2009-Oct-18.47885)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
2009 TC8JPL Sentry15012017-209871.5e-09-5.53-5.740JPL: "Analysis based on 28 observations spanning 5.0209 days (2009-Oct-14.16478 to 2009-Oct-19.18571)." Diameter approximately 0.562 km. from mean, weighted H=18.9.
NEODyS1501R E M O V E D-
2009 TS7NEODyS1501R E M O V E D-
JPL Sentry1501R E M O V E DJPL: Risk listing removed at 0951 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 20 October '09

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

2202Noted that JPL Sentry has updated its 2009 TM8 risk assessment - see above
Grabbed MPEC 2009-U54 - Comet P/2009 S1 (Gibbs) - see above
2000Noted that JPL Sentry has updated its 2009 TH8 risk assessment - see above
Noted that JPL Sentry has removed 2009 UE as an impact risk - see above
1909Noted Radar Astrometry database update - see above
1700Noted that JPL Sentry has posted 2009 UN3 as an impact risk - see above
Grabbed MPEC 2009-U51 - 2009 UM3 - see above
Grabbed MPEC 2009-U52 - 2009 UN3 - see above
Grabbed MPEC 2009-U53 - 2009 UO3 - see above
1502Grabbed MPEC 2009-U50 - Daily Orbit Update - see above
1501Noted that JPL Sentry has updated its 2009 TC8 risk assessment - see above
Noted that NEODyS has removed 2009 TC8 as an impact risk - see above
Noted that JPL Sentry has removed 2009 TE10 as an impact risk - see above
Noted that NEODyS has removed 2009 TE10 as an impact risk - see above
Noted that JPL Sentry has removed 2009 TO8 as an impact risk - see above
Noted that JPL Sentry has removed 2009 TQ8 as an impact risk - see above
Noted that NEODyS has removed 2009 TQ8 as an impact risk - see above
Noted that JPL Sentry has removed 2009 TS7 as an impact risk - see above
Noted that NEODyS has removed 2009 TS7 as an impact risk - see above
Noted that JPL Sentry has removed 2009 UD2 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 UF2 risk assessment - see above
Noted that NEODyS has posted 2009 UF2 as an impact risk - see above