Contents  on 29 January '11

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 29 January '11

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

When last checked at 2324 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these 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 29 January '11

Minor Planet Electronic Circulars

As of last check at 2324 UTC, there have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-B65 - "21:58 UT" - 2004 CK39


MPEC 2011-B64 - "14:08 UT" - 2011 BY24


MPEC 2011-B63 - "11:01 UT" - 2011 BP24


MPEC 2011-B62 - "10:56 UT" - 2011 BO24


MPEC 2011-B61 - "10:50 UT" - 2011 BN24


MPEC 2011-B60 - "10:45 UT" - 2011 BM24


MPEC 2011-B59 - "09:38 UT" - 2011 BL24


MPEC 2011-B58 - "09:18 UT" - 2011 BK24


MPEC 2011-B57 - "09:12 UT" - 2011 BJ24


<< DOU on 29 Jan. '11 >>  MPEC 2011-B56 - "07:08 UT" - Daily Orbit Update


MPEC 2011-B55 - "03:50 UT" - 2011 BG24

Observers  on 29 January '11

A total of 32 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2011-B62 -- 2011 BO24
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-B63 -- 2011 BP24
300Bisei Spaceguard Center in Japan, 3 in MPECs 2011-B58, 2011-B62 & 2011-B63 -- 2011 BP24, 2011 BO24, 2011 BK24
235CAST Obs. in Italy, 1 in MPEC 2011-B57 -- 2011 BJ24
160Castelmartini Obs. in Italy, 4 in MPEC 2011-B56 -- 2010 YB, 1999 TK12, 89830, 137052
703Catalina Sky Survey (CSS) in Arizona, 16 in MPECs 2011-B56, 2011-B57, 2011-B58, 2011-B62 & 2011-B63 -- 2011 BP24, 2011 BO24, 2011 BK24, 2011 BJ24, 2010 YH, 2010 RF181, 2010 LF86, 25916, 185851, 174881, 159533, 152680, 138175, 6569, 3838, 3199
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2011-B57 -- 2011 BJ24
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2011-B57 -- 2011 BJ24
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-B65 -- 2004 CK39
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-B65 -- 2004 CK39
B15Inastars Obs. in Germany, 2 in MPECs 2011-B57 & 2011-B58 -- 2011 BK24, 2011 BJ24
G92Jarnac Obs. in Arizona, 1 in MPEC 2011-B56 -- 18882
682Kanab Obs. in Utah, 1 in MPEC 2011-B56 -- 2011 BB19
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 11 in MPEC 2011-B56 -- 2011 BG10, 2011 AT26, 2011 AM12, 2011 AK5, 2010 YB, 2010 WZ8, 2010 UT7, 2010 RF181, 2010 JG, 1999 TK12, 253841
704LINEAR in New Mexico, 18 in MPECs 2011-B55 & 2011-B56 -- 2011 BV10, 2011 BG24, 2011 AM24, 2010 YB, 2010 XP51, 2002 OS4, 36284, 34613, 251346, 243025, 22771, 175706, 162781, 15745, 154589, 152889, 143381, 137125
H01Magdalena Ridge Obs. (MRO) in New Mexico, 9 in MPECs 2011-B56, 2011-B57, 2011-B58, 2011-B59, 2011-B60, 2011-B61, 2011-B62 & 2011-B63 -- 2011 BP24, 2011 BO24, 2011 BN24, 2011 BM24, 2011 BL24, 2011 BK24, 2011 BJ24, 2011 AK37, 2010 XW58
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-B60 -- 2011 BM24
118Modra Obs. in Slovakia, 5 in MPECs 2011-B56, 2011-B57, 2011-B58, 2011-B59 & 2011-B62 -- 2011 BO24, 2011 BL24, 2011 BK24, 2011 BJ24, 2011 BB19
474Mt. John Obs. in New Zealand, 1 in MPEC 2011-B64 -- 2011 BY24
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2011-B56, 2011-B59 & 2011-B61 -- 2011 BN24, 2011 BL24, 2011 AR26, 2011 AF37, 2003 WB25, 85275, 68278, 262623, 261938, 253106, 154347, 152671, 138893, 10563, 5189
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-B60 -- 2011 BM24
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2011-B56 -- 2005 GW119, 2001 DQ8, 36284, 23183, 152889, 137125
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-B58 -- 2011 BK24
I20Rio Cuarto Obs. in Argentina, 1 in MPEC 2011-B57 -- 2011 BJ24
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-B57 -- 2011 BJ24
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2011-B57, 2011-B58, 2011-B62 & 2011-B63 -- 2011 BP24, 2011 BO24, 2011 BK24, 2011 BJ24
H36Sandlot Obs. in Kansas, 7 in MPECs 2011-B56, 2011-B57, 2011-B58, 2011-B59, 2011-B60, 2011-B62 & 2011-B63 -- 2011 BP24, 2011 BO24, 2011 BM24, 2011 BL24, 2011 BK24, 2011 BJ24, 2011 BB19
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2011-B56 -- 36284, 13553
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2011-B56 & 2011-B60 -- 2011 BY18, 2011 BX10, 2011 BV11, 2011 BT15, 2011 BM24, 2011 AH37, 2011 AG5, 2010 LF86
6734Mike Hicks via Table Mtn. Obs. in southern California, 1 in MPEC 2011-B58 -- 2011 BK24
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-B56 -- 2011 BZ18
C51WISE in Earth polar orbit, 3 in MPECs 2011-B56 & 2011-B64 -- 2011 BY24, 1999 TK12, 136874
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 January '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2324 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
2011 BY24JPL Sentry16522064-209357.5e-09-6.69-6.780JPL: "Analysis based on 12 observations spanning 4.6358 days (2011-Jan-24.90012 to 2011-Jan-29.53588)." Diameter approximately 0.140 km. from mean, weighted H=22.0.
2011 BO24JPL Sentry16522019-2109982.5e-07-3.41-4.040JPL: "Analysis based on 29 observations spanning .91843 days (2011-Jan-28.39612 to 2011-Jan-29.31455)." Diameter approximately 0.610 km. from mean, weighted H=18.7.
2011 BN24JPL Sentry16522013-21021991.2e-07-4.42-5.200JPL: "Analysis based on 11 observations spanning .95356 days (2011-Jan-28.30613 to 2011-Jan-29.25969)." Diameter approximately 0.215 km. from mean, weighted H=21.0.
2011 BJ24JPL Sentry16522044-210197.1e-09-4.77-5.340JPL: "Analysis based on 44 observations spanning 1.0457 days (2011-Jan-28.1131 to 2011-Jan-29.15882)." Diameter approximately 1.000 km. from mean, weighted H=17.6.
NEODyS16522031-2082102.88e-09-4.92-5.240NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2011-01-28.114 to 2011-01-29.160."
2011 BF24NEODyS16532013-20881082.63e-08-7.52-8.50NEODyS: "Based on 10 optical observations (of which 0 are rejected as outliers) from 2011-01-28.404 to 2011-01-28.490."
JPL Sentry03562019-2098842.8e-08-7.61-8.810JPL: "Analysis based on 10 observations spanning .08586 days (2011-Jan-28.40309 to 2011-Jan-28.48895)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2011 BY18NEODyS16532080-208019.6e-09-5.67-5.670NEODyS: "Based on 32 optical observations (of which 1 are rejected as outliers) from 2011-01-27.162 to 2011-01-29.223."
JPL Sentry16522043-208029.1e-09-5.57-5.800JPL: "Analysis based on 31 observations spanning 2.0604 days (2011-Jan-27.1617 to 2011-Jan-29.22211)." Diameter approximately 0.262 km. from mean, weighted H=20.5.
2011 BX18NEODyS16522015-20901102.71e-08-3.69-4.320NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2011-01-26.311 to 2011-01-28.253."
2011 BW18NEODyS16532076-207611.6e-11-8.35-8.350NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2011-01-23.146 to 2011-01-28.220."
2011 BT15JPL Sentry16522027-2090593.0e-05-3.07-3.610JPL: "Analysis based on 22 observations spanning 4.8809 days (2011-Jan-24.28933 to 2011-Jan-29.17021)." Diameter approximately 0.146 km. from mean, weighted H=21.9.
NEODyS16522027-2090533.09e-05-2.91-3.270NEODyS: "Based on 22 optical observations (of which 1 are rejected as outliers) from 2011-01-24.290 to 2011-01-29.171."
2011 BV11JPL Sentry16522096-210151.6e-08-6.95-7.030JPL: "Analysis based on 20 observations spanning 3.0666 days (2011-Jan-25.26063 to 2011-Jan-28.32725)." Diameter approximately 0.074 km. from mean, weighted H=23.3.
NEODyS1652R E M O V E D-
2011 BX10JPL Sentry16522044-210633.6e-07-3.61-3.610JPL: "Analysis based on 44 observations spanning 5.0770 days (2011-Jan-24.13405 to 2011-Jan-29.21106)." Diameter approximately 0.710 km. from mean, weighted H=18.4.
NEODyS16522044-207632.03e-09-5.49-5.750NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2011-01-24.135 to 2011-01-29.212."
2011 BG10JPL Sentry16522051-207441.8e-05-5.26-5.530JPL: "Analysis based on 32 observations spanning 5.0037 days (2011-Jan-23.26948 to 2011-Jan-28.27316)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
NEODyS16522051-205141.55e-05-5.33-5.590NEODyS: "Based on 32 optical observations (of which 1 are rejected as outliers) from 2011-01-23.270 to 2011-01-28.274."
2011 AK37JPL Sentry16522057-209721.3e-07-7.15-7.230JPL: "Analysis based on 25 observations spanning 15.151 days (2011-Jan-13.30429 to 2011-Jan-28.45538)." Diameter approximately 0.031 km. from mean, weighted H=25.2.
2011 AG5JPL Sentry16522036-205797.1e-05-2.64-2.830JPL: "Analysis based on 75 observations spanning 20.973 days (2011-Jan-08.2673 to 2011-Jan-29.24037)." Diameter approximately 0.140 km. from mean, weighted H=22.0.
NEODyS16522036-2057137.1e-05-2.65-2.840NEODyS: "Based on 75 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-01-29.241."
2010 XW58JPL Sentry16522069-2106114.5e-06-5.55-6.050JPL: "Analysis based on 60 observations spanning 47.987 days (2010-Dec-11.47391 to 2011-Jan-28.46048)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS16522069-208861.29e-06-5.99-6.110NEODyS: "Based on 61 optical observations (of which 1 are rejected as outliers) from 2010-12-11.475 to 2011-01-28.461."

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 29 January '11

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

2209Grabbed MPEC 2011-B65 - 2004 CK39 - see above
1652Noted that JPL Sentry has updated its 2010 XW58 risk assessment - see above
Noted that NEODyS has updated its 2010 XW58 risk assessment - see above
Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above
Noted that NEODyS has updated its 2011 AG5 risk assessment - see above
Noted that JPL Sentry has updated its 2011 AK37 risk assessment - see above
Noted that NEODyS has posted 2011 BF24 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BG10 risk assessment - see above
Noted that NEODyS has updated its 2011 BG10 risk assessment - see above
Noted that JPL Sentry has posted 2011 BJ24 as an impact risk - see above
Noted that NEODyS has posted 2011 BJ24 as an impact risk - see above
Noted that JPL Sentry has posted 2011 BN24 as an impact risk - see above
Noted that JPL Sentry has posted 2011 BO24 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BT15 risk assessment - see above
Noted that NEODyS has updated its 2011 BT15 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BV11 risk assessment - see above
Noted that NEODyS has removed 2011 BV11 as an impact risk - see above
Noted that NEODyS has posted 2011 BW18 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BX10 risk assessment - see above
Noted that NEODyS has updated its 2011 BX10 risk assessment - see above
Noted that NEODyS has posted 2011 BX18 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BY18 risk assessment - see above
Noted that NEODyS has posted 2011 BY18 as an impact risk - see above
Noted that JPL Sentry has posted 2011 BY24 as an impact risk - see above
Grabbed MPEC 2011-B56 - Daily Orbit Update - see above
Grabbed MPEC 2011-B57 - 2011 BJ24 - see above
Grabbed MPEC 2011-B58 - 2011 BK24 - see above
Grabbed MPEC 2011-B59 - 2011 BL24 - see above
Grabbed MPEC 2011-B60 - 2011 BM24 - see above
Grabbed MPEC 2011-B61 - 2011 BN24 - see above
Grabbed MPEC 2011-B62 - 2011 BO24 - see above
Grabbed MPEC 2011-B63 - 2011 BP24 - see above
Grabbed MPEC 2011-B64 - 2011 BY24 - see above
0356Noted that JPL Sentry has posted 2011 BF24 as an impact risk - see above
Grabbed MPEC 2011-B55 - 2011 BG24 - see above