P/2010 A2 (LINEAR) imaged March 2010 
from Rosetta. Credit: ESA/MPS-Osiris.

This week the Max Planck Institute for Solar System Research (MPS) reported that, by combining Earth-based observations with March observation from the Rosetta spacecraft from "well beyond the orbit of Mars," they "could pinpoint the date of the [P/2010 A2 (LINEAR)] collision to a window of ten days around February 10th, 2009." See more info yesterday. Credit: ESA and MPS OSIRIS camera team.


Contents  on 15 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 15 October '10

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

When last checked at 2346 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of twelve 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 '10

Minor Planet Electronic Circulars

As of last check at 2346 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-T123 - "18:10 UT" - 2010 TX149


MPEC 2010-T122 - "18:01 UT" - 2010 TW149


MPEC 2010-T121 - "17:40 UT" - 2010 TV149


MPEC 2010-T120 - "16:12 UT" - 2010 TU149


<< DOU on 15 Oct. '10 >>  MPEC 2010-T119 - "06:10 UT" - Daily Orbit Update


MPEC 2010-T118 - "02:27 UT" - 2010 TS149

Observers  on 15 October '10

A total of 25 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 19 in MPECs 2010-T118, 2010-T119, 2010-T120, 2010-T121, 2010-T122 & 2010-T123 -- 2010 TX54, 2010 TX149, 2010 TW54, 2010 TW149, 2010 TV149, 2010 TU54, 2010 TU149, 2010 TS149, 2010 TN54, 2010 TJ54, 2010 TH54, 2010 TG54, 2010 TG19, 2010 TF54, 2010 TC55, 2010 TC54, 2010 SK15, 2010 SD13, 2010 RN80
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2010-T119 -- 2010 RS180
703Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2010-T119, 2010-T121 & 2010-T123 -- 2010 TX149, 2010 TV149, 2010 TJ7, 2010 RG137, 2001 TX44, 2000 TJ1, 48603, 226554
G58Chabot Obs. in northern California, 3 in MPEC 2010-T119 -- 2010 TH19, 2010 RT80, 2010 PL9
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-T119 -- 2003 UV11
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPECs 2010-T119, 2010-T120 & 2010-T121 -- 2010 TV149, 2010 TU149, 2010 TC54
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 2 in MPECs 2010-T120 & 2010-T122 -- 2010 TW149, 2010 TU149
F656Richard Miles in England via Faulkes Telescope North in Hawaii, 1 in MPEC 2010-T119 -- 2010 TE55
203GiaGa Obs. in Italy, 2 in MPEC 2010-T119 -- 2010 TG19, 2010 RN80
240Herrenberg Obs. in Germany, 2 in MPEC 2010-T119 -- 2001 SA270, 2000 PQ27
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2010-T119 -- 12538
682Kanab Obs. in Utah, 1 in MPEC 2010-T121 -- 2010 TV149
046Klet Obs. in the Czech Republic, 1 in MPEC 2010-T119 -- 2010 TO55
704LINEAR in New Mexico, 21 in MPECs 2010-T119, 2010-T120 & 2010-T121 -- 2010 TV149, 2010 TU149, 2010 TR55, 2010 TM3, 2010 TG19, 2010 TE55, 2010 TC55, 2010 QD2, 2010 PM10, 2010 LY63, 2005 TB15, 2002 DY3, 2001 WT1, 2001 TX44, 2000 TU28, 88959, 68278, 228502, 219071, 137062, 137032
J75La Sagra Obs. in Spain, 1 in MPEC 2010-T121 -- 2010 TV149
H01Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2010-T118, 2010-T119, 2010-T120, 2010-T121, 2010-T122 & 2010-T123 -- 2010 TX149, 2010 TW149, 2010 TV149, 2010 TU149, 2010 TS149, 2010 TN55, 2010 TL55, 2010 TK54
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2010-T118 & 2010-T119 -- 2010 TS149, 2010 RS180, 2010 PP2, 2007 XT58, 2005 TE45, 153792
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2010-T119 -- 2010 RB130, 2005 YY36
473Remanzacco Obs. in Italy, 1 in MPEC 2010-T118 -- 2010 TS149
H36Sandlot Obs. in Kansas, 4 in MPECs 2010-T118, 2010-T120, 2010-T121 & 2010-T122 -- 2010 TW149, 2010 TV149, 2010 TU149, 2010 TS149
587Sormano Obs. in Italy, 2 in MPEC 2010-T119 -- 2010 TX54, 2010 TG54
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2010-T119 & 2010-T122 -- 2010 TW149, 2008 CZ118, 4486
291Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2010-T118 & 2010-T119 -- 2010 TS149, 2010 SL13, 2010 SH13, 2010 PD57, 2010 LL68
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-T121 -- 2010 TV149
198Wildberg Obs. in Germany, 1 in MPEC 2010-T119 -- 2010 TC55
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 October '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2346 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 TW149JPL Sentry23462058-2108569.4e-06-5.52-6.120JPL: "Analysis based on 20 observations spanning 1.0413 days (2010-Oct-14.26727 to 2010-Oct-15.30859)." Diameter approximately 0.023 km. from mean, weighted H=25.9.
2010 TU149JPL Sentry23462044-209861.6e-07-4.17-4.440JPL: "Analysis based on 24 observations spanning 1.9923 days (2010-Oct-13.37823 to 2010-Oct-15.37057)." Diameter approximately 0.311 km. from mean, weighted H=20.2.
2010 TP55NEODyS12242013-2090854.89e-08-4.06-4.310NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2010/10/11.477 to 2010/10/14.463."
2010 TN55JPL Sentry12242057-2105404.1e-06-6.17-6.830JPL: "Analysis based on 17 observations spanning 1.0916 days (2010-Oct-13.27465 to 2010-Oct-14.36627)." Diameter approximately 0.013 km. from mean, weighted H=27.0.
NEODyS12242057-2090196.44e-06-5.92-6.170NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2010/10/13.275 to 2010/10/14.367."
2010 TL55NEODyS1224R E M O V E D-
JPL Sentry1224R E M O V E DJPL: Risk listing removed at 0950 UTC.
2010 TW54JPL Sentry12242074-2106112.2e-05-6.27-6.310JPL: "Analysis based on 53 observations spanning 2.9806 days (2010-Oct-11.34885 to 2010-Oct-14.32942)." Diameter approximately 0.011 km. from mean, weighted H=27.5.
NEODyS12242081-209051.15e-06-7.46-7.490NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2010/10/11.350 to 2010/10/14.330."
2010 TK54NEODyS12242057-207791.06e-07-3.86-4.380NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2010/10/08.403 to 2010/10/14.375."

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 '10

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

2346Noted that JPL Sentry has posted 2010 TU149 as an impact risk - see above
Noted that JPL Sentry has posted 2010 TW149 as an impact risk - see above
Grabbed MPEC 2010-T120 - 2010 TU149 - see above
Grabbed MPEC 2010-T121 - 2010 TV149 - see above
Grabbed MPEC 2010-T122 - 2010 TW149 - see above
Grabbed MPEC 2010-T123 - 2010 TX149 - see above
1224Noted that NEODyS has updated its 2010 TK54 risk assessment - see above
Noted that JPL Sentry has removed 2010 TL55 as an impact risk - see above
Noted that NEODyS has removed 2010 TL55 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 TN55 risk assessment - see above
Noted that NEODyS has updated its 2010 TN55 risk assessment - see above
Noted that NEODyS has posted 2010 TP55 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 TW54 risk assessment - see above
Noted that NEODyS has updated its 2010 TW54 risk assessment - see above
Grabbed MPEC 2010-T119 - Daily Orbit Update - see above
0417Grabbed MPEC 2010-T118 - 2010 TS149 - see above