4 Vesta size comparison with Earth's Moon. 
Credit: NASA, ESA, Li & McFadden.

The Hubble Space Telescope took another look at 4 Vesta's rotation on February 28th to help planning for Dawn's approach next July. A news release yesterday has images plus an illustration showing the Main Belt's second largest object to scale with our Moon. Also this past week, the Planetary Science Institute told about studying "the [complex] dynamics of the Dawn spacecraft as it orbits the large Arizona-sized, non-spherical asteroid" (preprint), done with open-source software. Credit: NASA, ESA, Li & McFadden.


Contents  on 9 October '10

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.

NEOCP Activity  on 9 October '10

The MPC's NEO Confirmation Page has 14 listings: 4 new, 10 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and ten updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of fifteen 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 9 October '10

Minor Planet Electronic Circulars

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


<< DOU on 9 Oct. '10 >>  MPEC 2010-T60 - "06:08 UT" - Daily Orbit Update


MPEC 2010-T59 - "02:15 UT" - 2010 TS19

Observers  on 9 October '10

A total of 22 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 4 in MPECs 2010-T59 & 2010-T60 -- 2010 TS19, 2010 TQ19, 2010 TK19, 2010 TH19
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2010-T60 -- 2010 TU5, 2010 TM3, 2010 TK6, 2010 TH19, 2010 TG19, 2010 TD, 2010 SV3, 2010 SK15, 2010 RH43, 2010 RF, 2010 AE, 2006 SP134, 2003 UV11
703Catalina Sky Survey (CSS) in Arizona, 14 in MPECs 2010-T59 & 2010-T60 -- 2010 TS19, 2010 TK, 2010 LY63, 2007 VG189, 2007 RU17, 2005 TB15, 2003 TX7, 2001 SA270, 2000 PQ27, 251346, 249615, 168378, 138847, 4688
448Desert Moon Obs. in New Mexico, 4 in MPEC 2010-T60 -- 2010 SA12, 2010 RG137, 2010 RC12, 2010 RB130
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-T60 -- 2010 TK19
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2010-T59 -- 2010 TS19
A17Guidestar Obs. in Germany, 3 in MPECs 2010-T59 & 2010-T60 -- 2010 TS19, 2010 SK15, 2010 SA12
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-T60 -- 2010 RA147
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 9 in MPECs 2010-T59 & 2010-T60 -- 2010 TS19, 2010 TM, 2010 RC130, 2010 RA147, 2010 MF1, 2009 MS, 2007 TU24, 2003 UV11, 2002 VE68
C05Konigsleiten Obs. in Austria, 2 in MPEC 2010-T60 -- 2010 RA147, 2010 MF1
704LINEAR in New Mexico, 16 in MPECs 2010-T59 & 2010-T60 -- 2010 TS19, 2010 SD13, 2010 RP80, 2010 RA147, 2007 TY18, 2007 RU17, 65679, 250706, 23187, 19764, 168378, 161998, 4660, 4486, 4055, 2212
J75La Sagra Obs. in Spain, 1 in MPEC 2010-T60 -- 138847
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPEC 2010-T60 -- 2010 TM, 2010 TG19, 2010 TD
473Remanzacco Obs. in Italy, 1 in MPEC 2010-T59 -- 2010 TS19
510Siegen Obs. in Germany, 1 in MPEC 2010-T59 -- 2010 TS19
691Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2010-T60 -- 2010 RQ80, 2004 EB, 19764, 18736, 4486, 2212
291Spacewatch 1.8m telescope in Arizona, 16 in MPEC 2010-T60 -- 2010 TU5, 2010 TN3, 2010 TG19, 2010 SY3, 2010 SV3, 2010 SL15, 2010 SL13, 2010 SH13, 2010 SG13, 2010 SE12, 2010 SC, 2010 RJ64, 2010 RE12, 2010 RA147, 2010 GH65, 2006 TC
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2010-T60 -- 2010 TN3
I19Tanti Obs. in Argentina, 2 in MPEC 2010-T60 -- 2010 RG137, 2010 RA147
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2010-T60 -- 66146, 3200
C51WISE in Earth polar orbit, 3 in MPEC 2010-T60 -- 2010 TK7, 246138, 3753
I15Wishing Star Obs. in Rhode Island, 5 in MPEC 2010-T60 -- 2010 RP80, 2010 RN80, 2004 VV, 2001 SA270, 100926
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 9 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.
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
2010 TG19NEODyS1601202619.08e-09-7.09-7.090NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2010/10/07.143 to 2010/10/09.180."
JPL Sentry1601R E M O V E DJPL: Risk listing removed at 1032 UTC.
2010 TU5JPL Sentry1601R E M O V E DJPL: Risk listing removed at 1030 UTC.
2010 TMJPL Sentry16012025-2110438.8e-07-3.08-3.520JPL: "Analysis based on 26 observations spanning 6.0688 days (2010-Oct-02.44882 to 2010-Oct-08.51767)." Diameter approximately 0.496 km. from mean, weighted H=19.2.
NEODyS16012027-2089125.95e-07-3.20-3.530NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2010/10/02.450 to 2010/10/08.518."
2010 TDJPL Sentry16012072-209152.3e-06-6.46-6.810JPL: "Analysis based on 30 observations spanning 7.0695 days (2010-Oct-01.20604 to 2010-Oct-08.27558)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
NEODyS16012072-208562.18e-06-6.48-6.830NEODyS: "Based on 32 optical observations (of which 2 are rejected as outliers) from 2010/10/01.207 to 2010/10/08.276."

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 9 October '10

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

1601Noted that JPL Sentry has updated its 2010 TD risk assessment - see above
Noted that NEODyS has updated its 2010 TD risk assessment - see above
Noted that JPL Sentry has removed 2010 TG19 as an impact risk - see above
Noted that NEODyS has updated its 2010 TG19 risk assessment - see above
Noted that JPL Sentry has updated its 2010 TM risk assessment - see above
Noted that NEODyS has updated its 2010 TM risk assessment - see above
Noted that JPL Sentry has removed 2010 TU5 as an impact risk - see above
Grabbed MPEC 2010-T60 - Daily Orbit Update - see above
0454Grabbed MPEC 2010-T59 - 2010 TS19 - see above