Contents  on 30 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 30 January '11

The MPC's NEO Confirmation Page has 9 listings: 4 new, 5 updated

When last checked at 2305 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and five updated listings. Of these, six were "one nighters." So far The Tracking News has counted a total of 24 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 30 January '11

Minor Planet Electronic Circulars

As of last check at 2305 UTC, there have been five MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-B70 - "22:15 UT" - 2010 OS22


MPEC 2011-B69 - "11:19 UT" - 2011 BJ39


MPEC 2011-B68 - "11:04 UT" - 2011 BH39


<< DOU on 30 Jan. '11 >>  MPEC 2011-B67 - "07:08 UT" - Daily Orbit Update


MPEC 2011-B66 - "03:17 UT" - 2011 BF39

Observers  on 30 January '11

A total of 22 observers appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield in Illinois, 21 in MPEC 2011-B67 -- 2011 BZ18, 2011 BY18, 2011 BY11, 2011 BX11, 2011 BX10, 2011 BU10, 2011 BP24, 2011 BN24, 2011 BL24, 2011 BK24, 2011 BG10, 2011 BE24, 2011 BB19, 2011 BA12, 2011 AF37, 2010 YH, 2010 YB, 2010 XT45, 2010 XG3, 2010 WJ, 2010 RG137
A74Bergen-Enkheim Obs. in Germany, 2 in MPEC 2011-B67 -- 2011 BO24, 89830
703Catalina Sky Survey (CSS) in Arizona, 12 in MPEC 2011-B67 -- 2011 BA12, 2011 AM24, 2010 YH, 2010 YB, 2005 UB, 2004 BE11, 96315, 89355, 68548, 188174, 159467, 7482
113Drebach Obs. in Germany, 3 in MPEC 2011-B67 -- 2011 AG5, 2010 WP8, 2000 CR101
639Dresden Obs. in Germany, 3 in MPEC 2011-B67 -- 96590, 18882, 175706
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-B67 -- 2010 OQ1
682Kanab Obs. in Utah, 1 in MPEC 2011-B67 -- 2011 BK24
046Klet Obs. in the Czech Republic, 1 in MPEC 2011-B67 -- 2011 BX10
704LINEAR in New Mexico, 5 in MPECs 2011-B66 & 2011-B67 -- 2011 BF39, 2010 WP8, 2004 BW58, 86324, 162781
844Los Molinos Obs. in Uruguay, 3 in MPEC 2011-B67 -- 2011 AF37, 2011 AA37, 2010 YB
H01Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2011-B66, 2011-B67, 2011-B68 & 2011-B69 -- 2011 BJ39, 2011 BH39, 2011 BG24, 2011 BF39
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-B70 -- 2010 OS22
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2011-B67 -- 2005 GW119, 2000 QN130
474Mt. John Obs. in New Zealand, 9 in MPEC 2011-B67 -- 2011 BY18, 2011 BR15, 2011 BJ24, 2011 BG24, 2011 BF24, 2011 BA19, 2011 AV55, 2011 AA37, 2010 XC24
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2011-B67, 2011-B68 & 2011-B69 -- 2011 BV10, 2011 BJ39, 2011 BH39, 2011 AL5, 68372, 250162
A13Naef Obs. in Switzerland, 1 in MPEC 2011-B67 -- 2011 AS26
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2011-B67 -- 2011 AF37, 2005 GW119, 2003 YS117
I20Rio Cuarto Obs. in Argentina, 2 in MPEC 2011-B67 -- 2011 BR15, 2011 AN16
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-B66 -- 2011 BF39
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2011-B67 -- 48603, 5189
291Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2011-B67 -- 2011 BX18, 2011 BU10, 2011 AX22, 2010 XZ67, 2010 XW58, 2010 JH87, 2006 HY51, 2006 CJ, 2004 XN50
C51WISE in Earth polar orbit, 1 in MPEC 2011-B67 -- 2010 HZ108
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 30 January '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2326 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 BF39NEODyS17502049-204911.7e-08-7.39-7.390NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2011-01-28.221 to 2011-01-30.092."
JPL Sentry05062047-204921.3e-08-7.50-7.560JPL: "Analysis based on 16 observations spanning 1.8708 days (2011-Jan-28.2199 to 2011-Jan-30.09074)." Diameter approximately 0.046 km. from mean, weighted H=24.3.
2011 BY24NEODyS17502058-208781.14e-08-6.54-6.660NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2011-01-24.901 to 2011-01-29.537."
2011 BO24JPL Sentry1750R E M O V E DJPL: Risk listing removed at 1457 UTC.
2011 BN24JPL Sentry17502014-21103644.2e-07-3.77-4.670JPL: "Analysis based on 14 observations spanning .99843 days (2011-Jan-28.30613 to 2011-Jan-29.304563)." Diameter approximately 0.244 km. from mean, weighted H=20.7.
NEODyS17502013-2087617.34e-08-4.16-4.840NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2011-01-28.307 to 2011-01-29.305."
2011 BM24NEODyS17502021-206662.9e-09-5.00-5.160NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2011-01-28.265 to 2011-01-29.214."
2011 BJ24JPL Sentry17502043-210153.3e-09-5.10-5.490JPL: "Analysis based on 48 observations spanning 1.3070 days (2011-Jan-28.1131 to 2011-Jan-29.42014)." Diameter approximately 1.000 km. from mean, weighted H=17.6.
NEODyS17502043-208282.58e-09-4.95-5.340NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2011-01-28.114 to 2011-01-29.421."
2011 BF24JPL Sentry1750R E M O V E DJPL: Risk listing removed at 1537 UTC.
NEODyS1750R E M O V E D-
2011 BY18JPL Sentry1750R E M O V E DJPL: Risk listing removed at 1323 UTC.
NEODyS1750R E M O V E D-
2011 BX18JPL Sentry17502030-2098303.1e-08-3.96-4.790JPL: "Analysis based on 23 observations spanning 3.1046 days (2011-Jan-26.31025 to 2011-Jan-29.41482)." Diameter approximately 0.837 km. from mean, weighted H=18.0.
NEODyS17502016-2090925.59e-08-3.36-3.820NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2011-01-26.311 to 2011-01-29.416."
2011 BA12JPL Sentry17502079-211097.6e-06-4.25-4.370JPL: "Analysis based on 41 observations spanning 4.1198 days (2011-Jan-25.1938 to 2011-Jan-29.313551)." Diameter approximately 0.097 km. from mean, weighted H=22.7.
NEODyS17502079-207915.3e-06-4.36-4.360NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2011-01-25.195 to 2011-01-29.314."
2011 BX10JPL Sentry17502068-210621.5e-07-4.03-4.030JPL: "Analysis based on 51 observations spanning 5.6335 days (2011-Jan-24.13405 to 2011-Jan-29.76752)." Diameter approximately 0.690 km. from mean, weighted H=18.4.
NEODyS1750R E M O V E D-
2011 BG10JPL Sentry17502051-207441.3e-06-6.42-6.680JPL: "Analysis based on 35 observations spanning 6.1459 days (2011-Jan-23.26948 to 2011-Jan-29.415371)." Diameter approximately 0.018 km. from mean, weighted H=26.3.
NEODyS17502051-207443.82e-06-5.94-6.20NEODyS: "Based on 35 optical observations (of which 1 are rejected as outliers) from 2011-01-23.270 to 2011-01-29.416."
2011 AX22JPL Sentry17502055-2101141.2e-04-3.80-3.840JPL: "Analysis based on 60 observations spanning 18.981 days (2011-Jan-10.30552 to 2011-Jan-29.28644)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS17502055-207861.15e-04-3.81-3.850NEODyS: "Based on 60 optical observations (of which 0 are rejected as outliers) from 2011-01-10.306 to 2011-01-29.287."
2011 AG5JPL Sentry17502036-205787.6e-05-2.60-2.790JPL: "Analysis based on 78 observations spanning 21.567 days (2011-Jan-08.2673 to 2011-Jan-29.83405)." Diameter approximately 0.140 km. from mean, weighted H=22.0.
NEODyS17502036-2057127.5e-05-2.61-2.80NEODyS: "Based on 78 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-01-29.835."
2010 XW58JPL Sentry17502069-2104124.4e-06-5.57-6.030JPL: "Analysis based on 62 observations spanning 48.868 days (2010-Dec-11.47391 to 2011-Jan-29.3417)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
NEODyS17502069-208939.34e-07-6.12-6.150NEODyS: "Based on 63 optical observations (of which 1 are rejected as outliers) from 2010-12-11.475 to 2011-01-29.342."

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 30 January '11

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

2305Grabbed MPEC 2011-B70 - 2010 OS22 - see above
1750Noted 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 AX22 risk assessment - see above
Noted that NEODyS has updated its 2011 AX22 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BA12 risk assessment - see above
Noted that NEODyS has updated its 2011 BA12 risk assessment - see above
Noted that JPL Sentry has removed 2011 BF24 as an impact risk - see above
Noted that NEODyS has removed 2011 BF24 as an impact risk - see above
Noted that NEODyS has posted 2011 BF39 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 updated its 2011 BJ24 risk assessment - see above
Noted that NEODyS has updated its 2011 BJ24 risk assessment - see above
Noted that NEODyS has posted 2011 BM24 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BN24 risk assessment - see above
Noted that NEODyS has posted 2011 BN24 as an impact risk - see above
Noted that JPL Sentry has removed 2011 BO24 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BX10 risk assessment - see above
Noted that NEODyS has removed 2011 BX10 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 BX18 risk assessment - see above
Noted that NEODyS has updated its 2011 BX18 risk assessment - see above
Noted that JPL Sentry has removed 2011 BY18 as an impact risk - see above
Noted that NEODyS has removed 2011 BY18 as an impact risk - see above
Noted that NEODyS has posted 2011 BY24 as an impact risk - see above
Grabbed MPEC 2011-B67 - Daily Orbit Update - see above
Grabbed MPEC 2011-B68 - 2011 BH39 - see above
Grabbed MPEC 2011-B69 - 2011 BJ39 - see above
0506Noted that JPL Sentry has posted 2011 BF39 as an impact risk - see above
0320Grabbed MPEC 2011-B66 - 2011 BF39 - see above