Contents  on 24 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 24 January '11

The MPC's NEO Confirmation Page has 3 listings: 3 updated

When last checked at 2255 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." The Tracking News counted a total of nine listings on the NEOCP at some point on this day.

New MPECs  on 24 January '11

Minor Planet Electronic Circulars

There were eight MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-B32 - "23:35 UT" - 2011 BY10


MPEC 2011-B31 - "23:23 UT" - 2011 BX10


MPEC 2011-B30 - "22:42 UT" - 2011 BW10


MPEC 2011-B29 - "22:37 UT" - 2011 BV10


MPEC 2011-B28 - "22:33 UT" - 2011 BU10


MPEC 2011-B27 - "16:06 UT" - 2011 BJ10


<< DOU on 24 Jan. '11 >>  MPEC 2011-B26 - "07:07 UT" - Daily Orbit Update


MPEC 2011-B25 - "03:37 UT" - 2011 BH10

Observers  on 24 January '11

Thirteen observers appeared in this day's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2011-B31 -- 2011 BX10
300Bisei Spaceguard Center in Japan, 4 in MPECs 2011-B28, 2011-B29, 2011-B30 & 2011-B31 -- 2011 BX10, 2011 BW10, 2011 BV10, 2011 BU10
160Castelmartini Obs. in Italy, 6 in MPEC 2011-B26 -- 2010 LF86, 2002 OS4, 2002 BN, 96590, 198856, 143381
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2011-B31 -- 2011 BX10
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-B26 -- 2010 RN80
G96Mt. Lemmon Survey (MLS) in Arizona, 18 in MPECs 2011-B25, 2011-B26, 2011-B27, 2011-B28, 2011-B29, 2011-B30, 2011-B31 & 2011-B32 -- 2011 BY10, 2011 BX10, 2011 BW10, 2011 BV10, 2011 BU10, 2011 BJ10, 2011 BH10, 2011 AX22, 2011 AW55, 2011 AS26, 2011 AM12, 2011 AL52, 2008 VK14, 2007 CA27, 68548, 261938, 248818, 137911
A13Naef Obs. in Switzerland, 4 in MPECs 2011-B26 & 2011-B28 -- 2011 BU10, 2010 XP51, 2010 TP54, 259221
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2011-B26 -- 2011 AL37, 96590, 23183, 18882
204Schiaparelli Obs. in Italy, 9 in MPECs 2011-B25, 2011-B26, 2011-B28, 2011-B30, 2011-B31 & 2011-B32 -- 2011 BY10, 2011 BX10, 2011 BW10, 2011 BU10, 2011 BH10, 2011 AL37, 2011 AF37, 2010 OQ1, 2004 BW58
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2011-B26 -- 2003 OU, 36236, 5869
587Sormano Obs. in Italy, 3 in MPECs 2011-B28, 2011-B30 & 2011-B31 -- 2011 BX10, 2011 BW10, 2011 BU10
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2011-B26 -- 2010 XC11, 2010 SO16, 2010 SL13
A48Verona Obs. in Italy, 3 in MPEC 2011-B26 -- 2011 AL37, 2010 LR68, 2007 CA27
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 January '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2255 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 BH10NEODyS16002018-2089307.4e-08-3.68-4.090NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2011-01-22.101 to 2011-01-24.092."
JPL Sentry06432018-21091362.0e-07-3.32-4.060JPL: "Analysis based on 14 observations spanning 1.9914 days (2011-Jan-22.09997 to 2011-Jan-24.09134)." Diameter approximately 0.752 km. from mean, weighted H=18.3.
2011 BG10NEODyS16002051-208253.05e-08-7.98-8.280NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2011-01-23.270 to 2011-01-23.407."
2011 AL52JPL Sentry16002049-210351.3e-08-4.18-4.400JPL: "Analysis based on 24 observations spanning 9.0236 days (2011-Jan-14.0961 to 2011-Jan-23.11974)." Diameter approximately 1.286 km. from mean, weighted H=17.2.
NEODyS16002049-204916.1e-09-4.39-4.390NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2011-01-14.097 to 2011-01-23.121."
2011 AX22JPL Sentry16002052-2106277.3e-05-4.06-4.220JPL: "Analysis based on 47 observations spanning 12.922 days (2011-Jan-10.30552 to 2011-Jan-23.22764)." Diameter approximately 0.038 km. from mean, weighted H=24.7.
NEODyS16002052-2088136.95e-05-4.07-4.220NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2011-01-10.306 to 2011-01-23.228."

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 24 January '11

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

0006 1/25Grabbed MPEC 2011-B31 - 2011 BX10 - see above
Grabbed MPEC 2011-B32 - 2011 BY10 - see above
2255Grabbed MPEC 2011-B28 - 2011 BU10 - see above
Grabbed MPEC 2011-B29 - 2011 BV10 - see above
Grabbed MPEC 2011-B30 - 2011 BW10 - see above
1702Grabbed MPEC 2011-B27 - 2011 BJ10 - see above
1600Noted that JPL Sentry has updated its 2011 AL52 risk assessment - see above
Noted that NEODyS has updated its 2011 AL52 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 NEODyS has posted 2011 BG10 as an impact risk - see above
Noted that NEODyS has posted 2011 BH10 as an impact risk - see above
Grabbed MPEC 2011-B26 - Daily Orbit Update - see above
0643Noted that JPL Sentry has posted 2011 BH10 as an impact risk - see above
0512Grabbed MPEC 2011-B25 - 2011 BH10 - see above