P/2010 A2 (LINEAR) imaged 29 May 2010 
from the HST. Credit: NASA/ESA/Jewitt.

It was announced yesterday that Hubble Space Telescope observations of P/2010 A2 (LINEAR) from January to May this year indicate that, among possible explanations, it is probably the result of a collision between "modest-sized asteroids" in the Main Belt in early 2009. See also February news links. The small point of light at left in this May 29th image seems to be the largest remnant. Credit: NASA, ESA, and David Jewitt.


Contents  on 14 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 14 October '10

The MPC's NEO Confirmation Page has 11 listings: 2 new, 9 updated

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

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 2010-T117 - "20:00 UT" - 2010 TS55


MPEC 2010-T116 - "19:11 UT" - 2010 TR55


MPEC 2010-T115 - "19:03 UT" - 2010 TP55


<< DOU on 14 Oct. '10 >>  MPEC 2010-T114 - "06:09 UT" - Daily Orbit Update

Observers  on 14 October '10

A total of 23 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2010-T114, 2010-T115, 2010-T116 & 2010-T117 -- 2010 TW54, 2010 TV54, 2010 TS55, 2010 TR55, 2010 TQ19, 2010 TP55, 2010 TN54, 2010 TM4, 2010 TJ7, 2010 TJ54, 2010 TG54, 2010 TD, 2010 SS16, 2010 SK15, 2010 SJ15, 2010 RA91
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2010-T114 -- 2003 QN47
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2010-T114 & 2010-T116 -- 2010 TR55, 2010 TF54, 2010 SK15, 2007 VG189, 2001 TX44, 2000 TU28, 251346, 168378, 154300, 138847, 4688
448Desert Moon Obs. in New Mexico, 1 in MPEC 2010-T116 -- 2010 TR55
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 3 in MPEC 2010-T114 -- 2010 TJ54, 2010 TF54, 2010 TC55
A17Guidestar Obs. in Germany, 1 in MPEC 2010-T114 -- 2010 TK
951Highworth Obs. in England, 3 in MPEC 2010-T114 -- 2010 TF54, 2010 RS180, 237442
046Klet Obs. in the Czech Republic, 5 in MPEC 2010-T114 -- 2010 TJ7, 2010 TF54, 2010 SD13, 2010 RP80, 2010 RN80
704LINEAR in New Mexico, 18 in MPECs 2010-T114 & 2010-T116 -- 2010 TY54, 2010 TX54, 2010 TR55, 2010 TN54, 2010 TM3, 2010 TE55, 2010 SA12, 2010 QD2, 2010 LY63, 2005 TB15, 2003 UV11, 2002 UR3, 2001 WT1, 2001 TX44, 88959, 228502, 216115, 137062
844Los Molinos Obs. in Uruguay, 2 in MPEC 2010-T114 -- 2010 TJ7, 2010 RG137
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2010-T115 & 2010-T117 -- 2010 TS55, 2010 TP55
900Moriyama Obs. in Japan, 1 in MPEC 2010-T116 -- 2010 TR55
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2010-T114, 2010-T115 & 2010-T117 -- 2010 TS55, 2010 TP55, 249615, 5797
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2010-T114 & 2010-T115 -- 2010 TP55, 2010 RB130, 2005 TB15, 154269, 4486
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-T116 -- 2010 TR55
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-T116 -- 2010 TR55
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-T116 -- 2010 TR55
510Siegen Obs. in Germany, 1 in MPEC 2010-T116 -- 2010 TR55
587Sormano Obs. in Italy, 1 in MPEC 2010-T116 -- 2010 TR55
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2010-T114 -- 2010 RQ80, 2010 RA147
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2010-T114 -- 2010 TF54, 2010 PL80, 2010 OL100, 2010 OB101, 2010 KK127, 2010 KH, 2009 WC26, 23548
H10Tzec Maun Obs. Mayhill in New Mexico, 2 in MPECs 2010-T114 & 2010-T116 -- 2010 TR55, 2003 UV11
I15Wishing Star Obs. in Rhode Island, 7 in MPEC 2010-T114 -- 2010 TF54, 2007 RU17, 2000 TU28, 237442, 138847, 137032, 7336
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 14 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 TN55NEODyS12052027-2090122.39e-08-8.46-9.160NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2010/10/13.275 to 2010/10/13.424."
JPL Sentry01472014-21091231.3e-06-6.59-7.550JPL: "Analysis based on 13 observations spanning .14900 days (2010-Oct-13.27465 to 2010-Oct-13.42365)." Diameter approximately 0.012 km. from mean, weighted H=27.2.
2010 TL55NEODyS12052073-207824.02e-10-6.19-6.240NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2010/10/11.494 to 2010/10/13.518."
JPL Sentry0047205516.2e-10-5.92-5.920JPL: "Analysis based on 8 observations spanning 2.0235 days (2010-Oct-11.49359 to 2010-Oct-13.51709)." Diameter approximately 0.610 km. from mean, weighted H=18.7.
2010 TW54JPL Sentry12052074-2107142.2e-05-6.25-6.320JPL: "Analysis based on 50 observations spanning 1.9830 days (2010-Oct-11.34885 to 2010-Oct-13.331887)." Diameter approximately 0.011 km. from mean, weighted H=27.5.
NEODyS12052081-208736.64e-08-8.67-9.070NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2010/10/11.350 to 2010/10/13.333."
2010 TDJPL Sentry12052072-209152.3e-06-6.45-6.790JPL: "Analysis based on 37 observations spanning 8.1633 days (2010-Oct-01.20604 to 2010-Oct-09.36932)." Diameter approximately 0.014 km. from mean, weighted H=26.9.

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 14 October '10

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

2014Grabbed MPEC 2010-T115 - 2010 TP55 - see above
Grabbed MPEC 2010-T116 - 2010 TR55 - see above
Grabbed MPEC 2010-T117 - 2010 TS55 - see above
1205Noted that JPL Sentry has updated its 2010 TD risk assessment - see above
Noted that NEODyS has posted 2010 TL55 as an impact risk - see above
Noted that NEODyS has posted 2010 TN55 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-T114 - Daily Orbit Update - see above
0147Noted that JPL Sentry has posted 2010 TN55 as an impact risk - see above
0047Noted that JPL Sentry has posted 2010 TL55 as an impact risk - see above