Comet 65P/Gunn imaged by WISE on 24 April 
2010. Credit: NASA/JPL-Caltech/UCLA.

NASA/JPL reported yesterday that the WISE infrared space telescope "has reached the expected end of its onboard supply of frozen coolant" but will continue observing in two bands for "one to four months" at a warmer instrument temperature to study asteroids and comets. (See also this.) The false-color four-band image here from April 24th shows comet 65P/Gunn traveling along its own dust trail. A few asteroids are also visible. Credit: NASA/JPL-Caltech/UCLA.

Contents  on 5 October '10


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 5 October '10

The MPC's NEO Confirmation Page has 2 listings: 1 new, 1 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and one updated listing. Both of these were "one nighters." So far The Tracking News has counted a total of eight 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 5 October '10

Minor Planet Electronic Circulars

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

MPEC 2010-T29 - "23:32 UT" - 2010 TK6

MPEC 2010-T28 - "22:58 UT" - 2010 RM64

MPEC 2010-T27 - "21:59 UT" - Comet P/2010 T1 (McNaught)

MPEC 2010-T26 - "13:02 UT" - 2010 TU5

MPEC 2010-T25 - "11:10 UT" - 2010 RR179

<< DOU on 5 Oct. '10 >>  MPEC 2010-T24 - "06:07 UT" - Daily Orbit Update

Observers  on 5 October '10

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B17AZT-8 Evpatoria in the Ukraine, 1 in MPEC 2010-T24 -- 2212
H21Astronomical Research Obs. Westfield in Illinois, 15 in MPECs 2010-T24, 2010-T25, 2010-T26 & 2010-T29 -- 2010 TU5, 2010 TK6, 2010 TK, 2010 SS16, 2010 SR16, 2010 SL15, 2010 SK15, 2010 SG15, 2010 SF15, 2010 SD13, 2010 RR179, 2010 RN80, 2010 RJ42, 2010 RJ4, 2010 PU66
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPEC 2010-T24 -- 2010 SK15, 2010 RK43, 2010 LY63
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2010-T29 -- 2010 TK6
J95Great Shefford Obs. in England, 1 in MPEC 2010-T29 -- 2010 TK6
379Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2010-T24 -- 2010 RP80, 2010 RN80, 2010 LY63, 2000 TJ1, 2212
J37Huelva Obs. in Spain, 1 in MPEC 2010-T24 -- 2000 TJ1
585Kiev Comet Station in the Ukraine, 1 in MPEC 2010-T24 -- 66146
704LINEAR in New Mexico, 2 in MPEC 2010-T24 -- 2002 TC70, 2000 TJ1
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2010-T25 & 2010-T29 -- 2010 TK6, 2010 RR179
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2010-T24 -- 249595
D90RAS Obs. Moorook in South Australia, 1 in MPEC 2010-T27 -- P/2010 T1
H36Sandlot Obs. in Kansas, 3 in MPECs 2010-T24, 2010-T25 & 2010-T26 -- 2010 TU5, 2010 SK15, 2010 RR179
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2010-T24, 2010-T27 & 2010-T28 -- P/2010 T1, 2010 RO82, 2010 RM64, 2010 QE2, 2010 OP1, 2009 UM, 2008 UF7
691Spacewatch 0.9m telescope in Arizona, 2 in MPECs 2010-T24 & 2010-T26 -- 2010 TU5, 249595
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2010-T24, 2010-T25 & 2010-T26 -- 2010 TU5, 2010 TN3, 2010 TL, 2010 TK, 2010 SJ15, 2010 RR179, 2010 RG42
I19Tanti Obs. in Argentina, 1 in MPEC 2010-T24 -- 2010 SK15
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-T27 -- P/2010 T1
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 October '10

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. Both also post impact solutions beyond 100 years for a few special 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
2010 TU5JPL Sentry16002023-2108761.8e-07-3.95-4.680JPL: "Analysis based on 20 observations spanning 1.9077 days (2010-Oct-03.41063 to 2010-Oct-05.31836)." Diameter approximately 0.407 km. from mean, weighted H=19.6.
2010 TKJPL Sentry1600R E M O V E DJPL: Risk listing removed at 0955 UTC.
NEODyS1600R E M O V E D-
2010 SJ15JPL Sentry16002038-207541.2e-09-6.81-7.130JPL: "Analysis based on 27 observations spanning 4.0981 days (2010-Sep-29.29976 to 2010-Oct-03.39783)." Diameter approximately 0.140 km. from mean, weighted H=21.9.

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 5 October '10

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

2359Grabbed MPEC 2010-T29 - 2010 TK6 - see above
2304Grabbed MPEC 2010-T27 - Comet P/2010 T1 (McNaught) - see above
Grabbed MPEC 2010-T28 - 2010 RM64 - see above
1600Noted that JPL Sentry has updated its 2010 SJ15 risk assessment - see above
Noted that JPL Sentry has removed 2010 TK as an impact risk - see above
Noted that NEODyS has removed 2010 TK as an impact risk - see above
Noted that JPL Sentry has posted 2010 TU5 as an impact risk - see above
Grabbed MPEC 2010-T24 - Daily Orbit Update - see above
Grabbed MPEC 2010-T25 - 2010 RR179 - see above
Grabbed MPEC 2010-T26 - 2010 TU5 - see above