Contents  on 14 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 14 October '09

The MPC's NEO Confirmation Page has 11 listings: 1 new, 10 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and ten updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of thirteen 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 14 October '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been four MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-T52 - "21:08 UT" - 2009 TL4

MPEC 2009-T51 - "15:31 UT" - 2009 TJ4

MPEC 2009-T50 - "13:14 UT" - 2008 UZ6

<< DOU on 14 Oct. '09 >>  MPEC 2009-T49 - "06:09 UT" - Daily Orbit Update

Observers  on 14 October '09

Sixteen observing facilities appear in today's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2009-T49 -- 2009 HD21
160Castelmartini Obs. in Italy, 4 in MPEC 2009-T49 -- 2000 CO101, 217796, 12711, 3988
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2009-T51 & 2009-T52 -- 2009 TL4, 2009 TJ4
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 2 in MPECs 2009-T49 & 2009-T52 -- 2009 TL4, 2009 TB3
683Goodricke-Pigott Obs. in Arizona, 2 in MPEC 2009-T49 -- 162998, 1865
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2009-T49 -- 2009 SM103, 2000 CO101, 3200
704LINEAR in New Mexico, 9 in MPEC 2009-T49 -- 2009 RB4, 2009 OC, 2001 HA4, 1993 RA, 52750, 22771, 20826, 143487, 5626
J75La Sagra Obs. in Spain, 4 in MPEC 2009-T49 -- 2007 DA41, 1998 MR24, 154244, 3288
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2009-T51 & 2009-T52 -- 2009 TL4, 2009 TJ4
474Mt. John Obs. in New Zealand, 1 in MPEC 2009-T51 -- 2009 TJ4
A24New Millennium Obs. in Italy, 1 in MPEC 2009-T52 -- 2009 TL4
D21Shenton Park Obs. in Western Australia, 6 in MPECs 2009-T49 & 2009-T52 -- 2009 TT, 2009 TL4, 2009 TK, 2009 TA1, 2009 SQ172, 2009 KL2
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-T49 -- 2009 NH, 2009 HD21, 217807
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2009-T49 & 2009-T50 -- 2009 TU, 2009 SG18, 2009 SB, 2009 QR8, 2009 QC36, 2008 UZ6, 2004 ET21
926Tenagra II Obs. in Arizona, 2 in MPEC 2009-T49 -- 2009 TT, 2009 TS
J35Tucci Obs. in Spain, 1 in MPEC 2009-T49 -- 159402
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 October '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2359 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 TB3JPL Sentry14222017-2108788.9e-08-4.93-5.510JPL: "Analysis based on 17 observations spanning 1.0036 days (2009-Oct-12.47133 to 2009-Oct-13.47498)." Diameter approximately 0.220 km. from mean, weighted H=21.0.
NEODyS14222013-2088469.34e-08-4.90-5.130NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2009/10/12.472 to 2009/10/13.476."
2009 TUJPL Sentry14222086-209552.3e-05-5.84-6.280JPL: "Analysis based on 45 observations spanning 4.0250 days (2009-Oct-10.18978 to 2009-Oct-14.21479)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
NEODyS14222084-208642.24e-05-5.85-6.290NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2009/10/10.191 to 2009/10/14.216."

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 14 October '09

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

2132Grabbed MPEC 2009-T52 - 2009 TL4 - see above
1723Grabbed MPEC 2009-T51 - 2009 TJ4 - see above
1422Noted that JPL Sentry has updated its 2009 TB3 risk assessment - see above
Noted that NEODyS has posted 2009 TB3 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-T49 - Daily Orbit Update - see above
Grabbed MPEC 2009-T50 - 2008 UZ6 - see above
0353Noted that the NEOCP has become active