Contents  on 26 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 26 January '11

The MPC's NEO Confirmation Page has 7 listings: 2 new, 5 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and five updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of thirteen 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 26 January '11

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been seven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-B40 - "20:31 UT" - 2011 BA12


MPEC 2011-B39 - "19:54 UT" - 2011 BZ11


MPEC 2011-B38 - "19:44 UT" - 2011 BY11


MPEC 2011-B37 - "19:37 UT" - 2011 BX11


MPEC 2011-B36 - "19:28 UT" - 2011 BW11


MPEC 2011-B35 - "19:22 UT" - 2011 BV11


<< DOU on 26 Jan. '11 >>  MPEC 2011-B34 - "07:07 UT" - Daily Orbit Update

Observers  on 26 January '11

Fifteen observers appear in today's MPECs.

CodeObserver / observatory
G53Alder Springs Obs. in northern California, 1 in MPEC 2011-B34 -- 2007 EM88
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2011-B34 & 2011-B40 -- 2011 BY10, 2011 BX10, 2011 BW10, 2011 BV10, 2011 BU10, 2011 BJ10, 2011 BG10, 2011 BF10, 2011 BA12, 2011 AN16, 2011 AM24, 2011 AL1, 2011 AB3, 2010 YH, 2010 XX72, 2010 VB140
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-B40 -- 2011 BA12
160Castelmartini Obs. in Italy, 13 in MPEC 2011-B34 -- 2011 AL37, 2010 JL33, 2008 CM20, 2007 CA27, 2002 OS4, 2002 BN, 259802, 259221, 154715, 152563, 137084, 111253, 5496
703Catalina Sky Survey (CSS) in Arizona, 5 in MPECs 2011-B34, 2011-B36 & 2011-B39 -- 2011 BZ11, 2011 BW11, 2005 GW119, 86324, 137084
H20Eastern Illinois Univ. Obs. in Illinois, 1 in MPEC 2011-B34 -- 2010 WP8
F65%T. Lister via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-B40 -- 2011 BA12
379Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2011-B34 -- 2011 AL37
G96Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2011-B34, 2011-B35, 2011-B36 & 2011-B37 -- 2011 BX11, 2011 BW11, 2011 BV11, 2010 XP51, 2002 BN, 163373
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-B35 & 2011-B40 -- 2011 BV11, 2011 BA12
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-B34 -- 2000 AZ93
587Sormano Obs. in Italy, 1 in MPEC 2011-B34 -- 2011 BY10
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2011-B34 & 2011-B40 -- 2011 BA12, 22771, 175706
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2011-B34, 2011-B38 & 2011-B40 -- 2011 BY11, 2011 BX10, 2011 BH10, 2011 BG10, 2011 BA12, 2011 AL52, 2011 AG5, 2010 XZ72, 2010 XZ67, 2010 XX72, 2010 XD11, 2006 UQ217, 2002 JB9
C51WISE in Earth polar orbit, 4 in MPEC 2011-B34 -- 2010 YD3, 249886, 7482, 3554
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 26 January '11

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
2011 BA12JPL Sentry23592024-2110513.5e-06-4.55-4.640JPL: "Analysis based on 24 observations spanning 1.2068 days (2011-Jan-25.1938 to 2011-Jan-26.40061)." Diameter approximately 0.095 km. from mean, weighted H=22.8.
2011 BW11JPL Sentry21232018-2101467.5e-08-8.13-8.540JPL: "Analysis based on 8 observations spanning .18008 days (2011-Jan-26.26508 to 2011-Jan-26.44516)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2011 BV11JPL Sentry22382025-2110681.2e-07-5.93-6.910JPL: "Analysis based on 12 observations spanning 1.0141 days (2011-Jan-25.26063 to 2011-Jan-26.27472)." Diameter approximately 0.073 km. from mean, weighted H=23.3.
2011 BY10JPL Sentry1717R E M O V E DJPL: Risk listing removed at 1135 UTC.
2011 BX10JPL Sentry17172020-2110176.9e-08-3.99-4.560JPL: "Analysis based on 32 observations spanning 2.0340 days (2011-Jan-24.13405 to 2011-Jan-26.1681)." Diameter approximately 0.750 km. from mean, weighted H=18.3.
NEODyS17172068-208042.18e-09-5.51-5.610NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2011-01-24.135 to 2011-01-26.169."
2011 BV10JPL Sentry1717R E M O V E DJPL: Risk listing removed at 1216 UTC.
NEODyS1717R E M O V E D-
2011 BH10JPL Sentry1717R E M O V E DJPL: Risk listing removed at 1136 UTC.
NEODyS1717R E M O V E D-
2011 BG10JPL Sentry1717205131.3e-05-5.39-5.610JPL: "Analysis based on 23 observations spanning 2.1392 days (2011-Jan-23.26948 to 2011-Jan-25.40863)." Diameter approximately 0.019 km. from mean, weighted H=26.3.
NEODyS17172051-207441.82e-05-5.25-5.520NEODyS: "Based on 23 optical observations (of which 1 are rejected as outliers) from 2011-01-23.270 to 2011-01-25.409."
2011 AL52JPL Sentry1717R E M O V E DJPL: Risk listing removed at 1214 UTC.
NEODyS1717R E M O V E D-
2011 AG5JPL Sentry17172036-205784.3e-05-2.86-3.050JPL: "Analysis based on 67 observations spanning 17.926 days (2011-Jan-08.2673 to 2011-Jan-26.19353)." Diameter approximately 0.140 km. from mean, weighted H=22.0.
NEODyS17172031-205794.27e-05-2.87-3.060NEODyS: "Based on 67 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-01-26.194."

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 26 January '11

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

2359Noted that JPL Sentry has posted 2011 BA12 as an impact risk - see above
2238Noted that JPL Sentry has posted 2011 BV11 as an impact risk - see above
2123Noted that JPL Sentry has posted 2011 BW11 as an impact risk - see above
2055Grabbed MPEC 2011-B40 - 2011 BA12 - see above
2026Grabbed MPEC 2011-B35 - 2011 BV11 - see above
Grabbed MPEC 2011-B36 - 2011 BW11 - see above
Grabbed MPEC 2011-B37 - 2011 BX11 - see above
Grabbed MPEC 2011-B38 - 2011 BY11 - see above
Grabbed MPEC 2011-B39 - 2011 BZ11 - see above
1717Noted 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 removed 2011 AL52 as an impact risk - see above
Noted that NEODyS has removed 2011 AL52 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 removed 2011 BH10 as an impact risk - see above
Noted that NEODyS has removed 2011 BH10 as an impact risk - see above
Noted that JPL Sentry has removed 2011 BV10 as an impact risk - see above
Noted that NEODyS has removed 2011 BV10 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 JPL Sentry has removed 2011 BY10 as an impact risk - see above
Grabbed MPEC 2011-B34 - Daily Orbit Update - see above