Contents  on 15 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 15 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 2003 UTC when the database was dated 15 Oct.

NEOCP Activity  on 15 October '09

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of 26 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 15 October '09

Minor Planet Electronic Circulars

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


MPEC 2009-T69 - "18:45 UT" - 2009 TQ8


MPEC 2009-T68 - "18:37 UT" - 2009 TP8


MPEC 2009-T67 - "18:34 UT" - 2009 TO8


MPEC 2009-T66 - "18:29 UT" - 2009 TN8


MPEC 2009-T65 - "18:25 UT" - 2009 TM8


MPEC 2009-T64 - "18:19 UT" - 2009 TL8


MPEC 2009-T63 - "18:16 UT" - 2009 TK8


MPEC 2009-T62 - "16:49 UT" - 2009 TH8


MPEC 2009-T61 - "16:41 UT" - 2009 TG8


MPEC 2009-T60 - "16:37 UT" - 2009 TF8


MPEC 2009-T59 - "16:32 UT" - 2009 TD8


MPEC 2009-T58 - "16:29 UT" - 2009 TC8


MPEC 2009-T57 - "16:25 UT" - 2009 TB8


MPEC 2009-T56 - "15:53 UT" - Comet C/2009 T3 (LINEAR)


<< DOU on 15 Oct. '09 >>  MPEC 2009-T55 - "06:09 UT" - Daily Orbit Update


MPEC 2009-T54 - "04:46 UT" - 2009 TS7


MPEC 2009-T53 - "03:50 UT" - 2009 TV4

Observers  on 15 October '09

A total of 29 observing facilities appear in today's MPECs.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2009-T55 -- 2009 ST19
251Arecibo in Puerto Rico, 1 in radar -- 68216
160Castelmartini Obs. in Italy, 6 in MPEC 2009-T55 -- 2009 SM103, 2009 SG2, 2009 RD4, 2009 MC9, 16834, 159402
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2009-T55, 2009-T64, 2009-T65, 2009-T66 & 2009-T67 -- 2009 TO8, 2009 TN8, 2009 TM8, 2009 TL8, 2009 TA1, 2009 SM, 17511, 154244, 8035, 3288
808El Leoncito Obs. in Argentina, 11 in MPEC 2009-T55 -- 2009 SG2, 2009 RN, 2009 MC9, 2005 TE15, 2005 RQ6, 212546, 159402, 143651, 5620, 2100, 433
A27Eridanus Obs. in Germany, 1 in MPEC 2009-T55 -- 159402
F65Faulkes Telescope North in Hawaii, 1 in MPEC 2009-T56 -- C/2009 T3
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 14 in MPECs 2009-T54, 2009-T55, 2009-T57, 2009-T58, 2009-T59, 2009-T60, 2009-T61, 2009-T63, 2009-T64, 2009-T65, 2009-T66, 2009-T67 & 2009-T69 -- 2009 TS7, 2009 TQ8, 2009 TO8, 2009 TN8, 2009 TM8, 2009 TL8, 2009 TK8, 2009 TJ4, 2009 TG8, 2009 TF8, 2009 TD8, 2009 TC8, 2009 TB8, 2009 TB3
253Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 68216
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-T55 -- 162998
B86Hagen Obs. in Germany, 2 in MPECs 2009-T55 & 2009-T56 -- 2009 TL4, C/2009 T3
704LINEAR in New Mexico, 8 in MPECs 2009-T55, 2009-T56 & 2009-T60 -- 2009 TF8, C/2009 T3, 2009 SV171, 2009 KM7, 30825, 154244, 5626, 3361
J75La Sagra Obs. in Spain, 4 in MPECs 2009-T55 & 2009-T63 -- 2009 TK8, 2009 TA1, 2009 SV171, 136617
H01Magdalena Ridge Obs. (MRO) in New Mexico, 12 in MPECs 2009-T53, 2009-T54, 2009-T56, 2009-T57, 2009-T58, 2009-T60, 2009-T61, 2009-T63, 2009-T64, 2009-T65, 2009-T66 & 2009-T67 -- 2009 TV4, 2009 TS7, 2009 TO8, 2009 TN8, 2009 TM8, 2009 TL8, 2009 TK8, 2009 TG8, 2009 TF8, 2009 TC8, 2009 TB8, C/2009 T3
900Moriyama Obs. in Japan, 1 in MPEC 2009-T63 -- 2009 TK8
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-T55 -- 2009 QL8
G96Mt. Lemmon Survey (MLS) in Arizona, 17 in MPECs 2009-T53, 2009-T54, 2009-T55, 2009-T57, 2009-T58, 2009-T59, 2009-T61, 2009-T62, 2009-T68 & 2009-T69 -- 2009 TV4, 2009 TU, 2009 TS7, 2009 TQ8, 2009 TP8, 2009 TP, 2009 TH8, 2009 TG8, 2009 TD8, 2009 TC8, 2009 TB8, 2009 ST103, 2009 SM, 2003 VO2, 30825, 216689, 3288
A13Naef Obs. in Switzerland, 1 in MPEC 2009-T56 -- C/2009 T3
A24New Millennium Obs. in Italy, 1 in MPEC 2009-T55 -- 2009 TL4
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-T56 -- C/2009 T3
473Remanzacco Obs. in Italy, 1 in MPEC 2009-T60 -- 2009 TF8
854Sabino Canyon Obs. in Arizona, 6 in MPECs 2009-T60, 2009-T63, 2009-T64, 2009-T65, 2009-T66 & 2009-T67 -- 2009 TO8, 2009 TN8, 2009 TM8, 2009 TL8, 2009 TK8, 2009 TF8
434San Benedetto Po Obs. in Italy, 2 in MPEC 2009-T55 -- 16834, 159402
204Schiaparelli Obs. in Italy, 2 in MPECs 2009-T56 & 2009-T60 -- 2009 TF8, C/2009 T3
D21Shenton Park Obs. in Western Australia, 7 in MPECs 2009-T55, 2009-T62 & 2009-T66 -- 2009 TT, 2009 TN8, 2009 TK, 2009 TH8, 2009 SW17, 2009 SV171, 2009 FU4
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-T55 & 2009-T62 -- 2009 TH8, 143651
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2009-T54, 2009-T55 & 2009-T58 -- 2009 TU, 2009 TS7, 2009 TC8, 2009 SW171, 2009 SV17, 2009 SS172, 2009 SB170, 2009 RV1, 2009 QE34, 55408
954Teide Obs. in the Canary Islands, 1 in MPEC 2009-T55 -- 2009 ST103
926Tenagra II Obs. in Arizona, 12 in MPECs 2009-T56, 2009-T57, 2009-T60, 2009-T61, 2009-T62, 2009-T63, 2009-T64, 2009-T65, 2009-T66, 2009-T67, 2009-T68 & 2009-T69 -- 2009 TQ8, 2009 TP8, 2009 TO8, 2009 TN8, 2009 TM8, 2009 TL8, 2009 TK8, 2009 TH8, 2009 TG8, 2009 TF8, 2009 TB8, C/2009 T3
H10Tzec Maun Obs. Mayhill in New Mexico, 2 in MPECs 2009-T56 & 2009-T64 -- 2009 TL8, C/2009 T3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 TQ8JPL Sentry22072015-21094235.2e-06-4.68-5.270JPL: "Analysis based on 18 observations spanning .12757 days (2009-Oct-15.36043 to 2009-Oct-15.488)." Diameter approximately 0.048 km. from mean, weighted H=24.2.
2009 TO8JPL Sentry2126204111.9e-10-9.95-9.950JPL: "Analysis based on 22 observations spanning .21419 days (2009-Oct-15.28441 to 2009-Oct-15.4986)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
2009 TM8JPL Sentry20032086-2108486.0e-05-6.21-6.850JPL: "Analysis based on 26 observations spanning .25807 days (2009-Oct-15.2109 to 2009-Oct-15.46897)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
2009 TH8JPL Sentry19022068-210068.7e-06-5.17-5.330JPL: "Analysis based on 16 observations spanning 1.0434 days (2009-Oct-14.54405 to 2009-Oct-15.58745)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
2009 TG8JPL Sentry1902205011.2e-10-6.73-6.730JPL: "Analysis based on 31 observations spanning 1.0674 days (2009-Oct-14.4517 to 2009-Oct-15.51915)." Diameter approximately 0.630 km. from mean, weighted H=18.7.
2009 TC8JPL Sentry18072022-2108434.2e-08-4.27-4.870JPL: "Analysis based on 22 observations spanning 1.0210 days (2009-Oct-14.16478 to 2009-Oct-15.18583)." Diameter approximately 0.637 km. from mean, weighted H=18.6.
2009 TS7JPL Sentry14032019-21082021.8e-06-4.59-5.630JPL: "Analysis based on 19 observations spanning 1.0158 days (2009-Oct-14.16257 to 2009-Oct-15.17841)." Diameter approximately 0.095 km. from mean, weighted H=22.8.
NEODyS14032015-20901287.25e-07-4.90-6.070NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2009/10/14.163 to 2009/10/15.179."
2009 TB3NEODyS14042013-2087453.12e-08-5.37-6.230NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2009/10/12.472 to 2009/10/13.478."
JPL Sentry14032017-2108801.0e-07-4.87-5.460JPL: "Analysis based on 18 observations spanning 1.0061 days (2009-Oct-12.47133 to 2009-Oct-13.47746)." Diameter approximately 0.220 km. from mean, weighted H=21.0.
2009 TUJPL Sentry14032086-209552.3e-05-5.84-6.290JPL: "Analysis based on 52 observations spanning 5.0288 days (2009-Oct-10.18978 to 2009-Oct-15.21859)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
NEODyS1403208632.25e-05-5.86-6.300NEODyS: "Based on 53 optical observations (of which 1 are rejected as outliers) from 2009/10/10.191 to 2009/10/15.219."

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 15 October '09

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

2207Noted that JPL Sentry has posted 2009 TQ8 as an impact risk - see above
2126Noted that JPL Sentry has posted 2009 TO8 as an impact risk - see above
2003Noted that JPL Sentry has posted 2009 TM8 as an impact risk - see above
Noted Radar Astrometry database update - see above
1930Grabbed MPEC 2009-T67 - 2009 TO8 - see above
Grabbed MPEC 2009-T68 - 2009 TP8 - see above
Grabbed MPEC 2009-T69 - 2009 TQ8 - see above
1902Noted that JPL Sentry has posted 2009 TG8 as an impact risk - see above
Noted that JPL Sentry has posted 2009 TH8 as an impact risk - see above
1835Grabbed MPEC 2009-T63 - 2009 TK8 - see above
Grabbed MPEC 2009-T64 - 2009 TL8 - see above
Grabbed MPEC 2009-T65 - 2009 TM8 - see above
Grabbed MPEC 2009-T66 - 2009 TN8 - see above
1807Noted that JPL Sentry has posted 2009 TC8 as an impact risk - see above
1704Grabbed MPEC 2009-T57 - 2009 TB8 - see above
Grabbed MPEC 2009-T58 - 2009 TC8 - see above
Grabbed MPEC 2009-T59 - 2009 TD8 - see above
Grabbed MPEC 2009-T60 - 2009 TF8 - see above
Grabbed MPEC 2009-T61 - 2009 TG8 - see above
Grabbed MPEC 2009-T62 - 2009 TH8 - see above
1617Grabbed MPEC 2009-T56 - Comet C/2009 T3 (LINEAR) - see above
1404Noted that NEODyS has updated its 2009 TB3 risk assessment - see above
1403Noted that JPL Sentry has updated its 2009 TB3 risk assessment - see above
Noted that JPL Sentry has posted 2009 TS7 as an impact risk - see above
Noted that NEODyS has posted 2009 TS7 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 TU risk assessment - see above
Noted that NEODyS has updated its 2009 TU risk assessment - see above
Grabbed MPEC 2009-T54 - 2009 TS7 - see above
Grabbed MPEC 2009-T55 - Daily Orbit Update - see above
0406Grabbed MPEC 2009-T53 - 2009 TV4 - see above