Contents  on 8 February '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 8 February '11

The MPC's NEO Confirmation Page has 22 listings: 7 new, 15 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seven new and fifteen updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 48 listings on the NEOCP 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 8 February '11

Minor Planet Electronic Circulars

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


MPEC 2011-C56 - "23:45 UT" - 2010 AO60


MPEC 2011-C55 - "20:47 UT" - 2011 CL22


MPEC 2011-C54 - "20:42 UT" - 2011 CK22


MPEC 2011-C53 - "20:35 UT" - 2011 CJ22


MPEC 2011-C52 - "20:29 UT" - 2011 CH22


MPEC 2011-C51 - "20:24 UT" - 2011 CG22


MPEC 2011-C50 - "20:19 UT" - 2011 CF22


MPEC 2011-C49 - "20:12 UT" - 2011 CE22


MPEC 2011-C48 - "20:07 UT" - 2011 CD22


MPEC 2011-C47 - "20:02 UT" - 2011 CC22


MPEC 2011-C46 - "10:32 UT" - 2011 CQ14


MPEC 2011-C45 - "10:00 UT" - 2011 CP14


<< DOU on 8 Feb. '11 >>  MPEC 2011-C44 - "07:10 UT" - Daily Orbit Update


MPEC 2011-C43 - "06:00 UT" - 2011 CO14


MPEC 2011-C42 - "05:05 UT" - 2011 BN59


MPEC 2011-C41 - "04:26 UT" - 2011 BM59

Observers  on 8 February '11

A total of 30 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2011-C44 -- 2011 BA12
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2011-C48 & 2011-C56 -- 2011 CD22, 2010 AO60
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-C47 -- 2011 CC22
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2011-C44 & 2011-C47 -- 2011 CC22, 2011 BV10, 2011 AL24, 2007 EJ, 2003 YS117, 100926
G58Chabot Obs. in northern California, 3 in MPEC 2011-C44 -- 2011 CG2, 2011 BM45, 2011 BB45
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2011-C44 -- 36284, 152889
639Dresden Obs. in Germany, 1 in MPEC 2011-C44 -- 3122
651Grasslands Obs. in Arizona, 4 in MPECs 2011-C43, 2011-C45, 2011-C46 & 2011-C48 -- 2011 CQ14, 2011 CP14, 2011 CO14, 2011 CD22
J95Great Shefford Obs. in England, 5 in MPECs 2011-C43, 2011-C44, 2011-C46, 2011-C48 & 2011-C51 -- 2011 CQ14, 2011 CO14, 2011 CG22, 2011 CD22, 2011 CA7
240Herrenberg Obs. in Germany, 1 in MPEC 2011-C44 -- 259802
G92Jarnac Obs. in Arizona, 1 in MPEC 2011-C44 -- 48603
046Klet Obs. in the Czech Republic, 2 in MPEC 2011-C44 -- 2011 CG2, 2010 WQ7
704LINEAR in New Mexico, 13 in MPECs 2011-C44 & 2011-C45 -- 2011 CZ6, 2011 CY7, 2011 CP14, 2011 CA4, 2011 AM24, 2011 AG5, 2011 AF37, 2010 LR68, 2003 WX87, 2002 TD60, 2001 DQ8, 143381, 4954
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2011-C42, 2011-C43, 2011-C46, 2011-C47, 2011-C48, 2011-C49 & 2011-C51 -- 2011 CQ14, 2011 CO14, 2011 CG22, 2011 CE22, 2011 CD22, 2011 CC22, 2011 BN59
B90Malina River Obs. in Italy, 2 in MPECs 2011-C45 & 2011-C47 -- 2011 CP14, 2011 CC22
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-C41 -- 2011 BM59
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-C44 -- 2011 BK24
118Modra Obs. in Slovakia, 1 in MPEC 2011-C45 -- 2011 CP14
G96Mt. Lemmon Survey (MLS) in Arizona, 17 in MPECs 2011-C43, 2011-C44, 2011-C46, 2011-C47, 2011-C48, 2011-C49, 2011-C50, 2011-C51, 2011-C52, 2011-C53, 2011-C54 & 2011-C55 -- 2011 CQ14, 2011 CO14, 2011 CL22, 2011 CK22, 2011 CJ22, 2011 CH22, 2011 CG22, 2011 CF22, 2011 CE22, 2011 CD22, 2011 CC22, 2011 BM45, 2011 BA12, 2005 GW119, 152889, 3200, 1580
A13Naef Obs. in Switzerland, 1 in MPEC 2011-C44 -- 2011 CZ3
I89Nerpio Obs. in Italy, 1 in MPEC 2011-C45 -- 2011 CP14
A24New Millennium Obs. in Italy, 25 in MPEC 2011-C44 -- 2011 AF37, 2009 DV42, 2005 GW119, 2001 DQ8, 2000 CR101, 1999 TK12, 96590, 89830, 85275, 48603, 40267, 36284, 23183, 21374, 18882, 175706, 152889, 152563, 137084, 111253, 5496, 4954, 3554, 3122, 1864
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-C41 -- 2011 BM59
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-C45 -- 2011 CP14
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-C44 -- 2011 CY3
204Schiaparelli Obs. in Italy, 4 in MPECs 2011-C43, 2011-C45, 2011-C46 & 2011-C47 -- 2011 CQ14, 2011 CP14, 2011 CO14, 2011 CC22
291Spacewatch 1.8m telescope in Arizona, 25 in MPECs 2011-C42, 2011-C44 & 2011-C45 -- 2011 CY3, 2011 CU4, 2011 CT4, 2011 CS4, 2011 CR4, 2011 CQ4, 2011 CP4, 2011 CP14, 2011 CO2, 2011 CN2, 2011 BX18, 2011 BV15, 2011 BT15, 2011 BO40, 2011 BN59, 2011 BM45, 2011 BM24, 2011 BL45, 2011 BJ24, 2011 BG40, 2011 BD40, 2011 BA12, 2011 AH3, 2011 AG5, 2003 EO16
926Tenagra II Obs. in Arizona, 7 in MPECs 2011-C44, 2011-C47, 2011-C48, 2011-C49, 2011-C51 & 2011-C54 -- 2011 CK22, 2011 CG22, 2011 CE22, 2011 CD22, 2011 CC22, 2011 BY18, 2011 BK24
C51WISE in Earth polar orbit, 1 in MPEC 2011-C42 -- 2011 BN59
198Wildberg Obs. in Germany, 1 in MPEC 2011-C45 -- 2011 CP14
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 February '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 CF22JPL Sentry22322022-21111704.4e-05-7.04-7.890JPL: "Analysis based on 10 observations spanning .10754 days (2011-Feb-07.37648 to 2011-Feb-07.48402)." Diameter approximately 0.002 km. from mean, weighted H=30.9.
2011 CC22JPL Sentry22032028-2102118.8e-08-5.03-5.140JPL: "Analysis based on 25 observations spanning 2.1233 days (2011-Feb-06.2612 to 2011-Feb-08.38449)." Diameter approximately 0.180 km. from mean, weighted H=21.4.
2011 CX7NEODyS18002027-202711.9e-07-4.77-4.770NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2011-02-05.415 to 2011-02-07.185."
2011 CA7NEODyS20312037-2085103.03e-07-9.05-9.440NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2011-02-07.375 to 2011-02-08.037."
JPL Sentry18002039-210145.5e-07-9.17-9.570JPL: "Analysis based on 13 observations spanning .66208 days (2011-Feb-07.3744 to 2011-Feb-08.03648)." Diameter approximately 0.003 km. from mean, weighted H=30.3.
2011 CT4JPL Sentry18002017-2103427.3e-08-4.38-4.950JPL: "Analysis based on 16 observations spanning 2.9698 days (2011-Feb-04.45755 to 2011-Feb-07.42737)." Diameter approximately 0.285 km. from mean, weighted H=20.5.
NEODyS18002019-2090383.36e-08-4.33-4.760NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2011-02-04.458 to 2011-02-07.428."
2011 CQ4JPL Sentry18002036-208395.9e-08-3.86-4.240JPL: "Analysis based on 22 observations spanning 6.8925 days (2011-Feb-01.23159 to 2011-Feb-08.12413)." Diameter approximately 0.630 km. from mean, weighted H=18.6.
NEODyS18002034-2075116.39e-08-3.77-4.150NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2011-02-01.232 to 2011-02-08.125."
2011 CZ3NEODyS1800R E M O V E D-
JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1323 UTC.
2011 CY3NEODyS1800R E M O V E D-
JPL Sentry1800R E M O V E DJPL: Risk listing removed at 1353 UTC.
2011 CN2NEODyS18012017-2090493.77e-08-3.69-3.990NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2011-02-02.509 to 2011-02-07.351."
JPL Sentry18002017-2108251.8e-08-3.87-4.050JPL: "Analysis based on 19 observations spanning 4.8421 days (2011-Feb-02.5079 to 2011-Feb-07.35)." Diameter approximately 0.665 km. from mean, weighted H=18.5.
2011 BM45JPL Sentry18002078-2108131.7e-05-2.88-2.950JPL: "Analysis based on 27 observations spanning 7.9314 days (2011-Jan-30.4027 to 2011-Feb-07.3341)." Diameter approximately 0.169 km. from mean, weighted H=21.6.
NEODyS18002086-209081.53e-05-2.85-2.910NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2011-01-30.403 to 2011-02-07.335."
2011 BL45JPL Sentry18002050-2109353.2e-05-6.09-6.710JPL: "Analysis based on 12 observations spanning 8.0458 days (2011-Jan-30.34391 to 2011-Feb-07.38973)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
NEODyS18002050-2090292.66e-04-4.71-5.120NEODyS: "Based on 12 optical observations (of which 1 are rejected as outliers) from 2011-01-30.345 to 2011-02-07.390."
2011 BJ24JPL Sentry1800210612.1e-09-5.49-5.490JPL: "Analysis based on 81 observations spanning 11.023 days (2011-Jan-28.1131 to 2011-Feb-08.13625)." Diameter approximately 0.990 km. from mean, weighted H=17.7.
2011 BX18JPL Sentry1800207311.3e-10-6.48-6.480JPL: "Analysis based on 34 observations spanning 12.949 days (2011-Jan-26.31025 to 2011-Feb-08.25949)." Diameter approximately 0.830 km. from mean, weighted H=18.1.
NEODyS1800R E M O V E D-
2011 BT15NEODyS18012027-2090714.32e-05-2.76-2.940NEODyS: "Based on 37 optical observations (of which 3 are rejected as outliers) from 2011-01-24.290 to 2011-02-08.223."
JPL Sentry18002027-2110915.5e-05-2.86-3.150JPL: "Analysis based on 36 observations spanning 14.933 days (2011-Jan-24.28933 to 2011-Feb-08.22237)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2011 BA12JPL Sentry18002079-211051.1e-06-5.08-5.400JPL: "Analysis based on 98 observations spanning 13.266 days (2011-Jan-25.1938 to 2011-Feb-07.45954)." Diameter approximately 0.099 km. from mean, weighted H=22.7.
NEODyS18002079-207915.1e-07-5.35-5.350NEODyS: "Based on 99 optical observations (of which 1 are rejected as outliers) from 2011-01-25.195 to 2011-02-07.460."
2011 AG5JPL Sentry18002036-2058131.5e-04-2.27-2.471JPL: "Analysis based on 99 observations spanning 30.942 days (2011-Jan-08.2673 to 2011-Feb-08.20939)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
NEODyS18002036-2058161.55e-04-2.28-2.481NEODyS: "Based on 99 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-02-08.210."

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 8 February '11

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

2359Grabbed MPEC 2011-C56 - 2010 AO60 - see above
2232Noted that JPL Sentry has posted 2011 CF22 as an impact risk - see above
2203Noted that JPL Sentry has posted 2011 CC22 as an impact risk - see above
2054Grabbed MPEC 2011-C48 - 2011 CD22 - see above
Grabbed MPEC 2011-C49 - 2011 CE22 - see above
Grabbed MPEC 2011-C50 - 2011 CF22 - see above
Grabbed MPEC 2011-C51 - 2011 CG22 - see above
Grabbed MPEC 2011-C52 - 2011 CH22 - see above
Grabbed MPEC 2011-C53 - 2011 CJ22 - see above
Grabbed MPEC 2011-C54 - 2011 CK22 - see above
Grabbed MPEC 2011-C55 - 2011 CL22 - see above
2031Noted that NEODyS has posted 2011 CA7 as an impact risk - see above
2004Grabbed MPEC 2011-C47 - 2011 CC22 - see above
1800Noted 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 BA12 risk assessment - see above
Noted that NEODyS has updated its 2011 BA12 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BJ24 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BL45 risk assessment - see above
Noted that NEODyS has updated its 2011 BL45 risk assessment - see above
Noted that JPL Sentry has updated its 2011 BM45 risk assessment - see above
Noted that NEODyS has updated its 2011 BM45 risk assessment - 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 BX18 risk assessment - see above
Noted that NEODyS has removed 2011 BX18 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 CA7 risk assessment - see above
Noted that JPL Sentry has updated its 2011 CN2 risk assessment - see above
Noted that NEODyS has updated its 2011 CN2 risk assessment - see above
Noted that JPL Sentry has updated its 2011 CQ4 risk assessment - see above
Noted that NEODyS has updated its 2011 CQ4 risk assessment - see above
Noted that JPL Sentry has updated its 2011 CT4 risk assessment - see above
Noted that NEODyS has updated its 2011 CT4 risk assessment - see above
Noted that NEODyS has posted 2011 CX7 as an impact risk - see above
Noted that JPL Sentry has removed 2011 CY3 as an impact risk - see above
Noted that NEODyS has removed 2011 CY3 as an impact risk - see above
Noted that JPL Sentry has removed 2011 CZ3 as an impact risk - see above
Noted that NEODyS has removed 2011 CZ3 as an impact risk - see above
Grabbed MPEC 2011-C44 - Daily Orbit Update - see above
Grabbed MPEC 2011-C45 - 2011 CP14 - see above
Grabbed MPEC 2011-C46 - 2011 CQ14 - see above
0705Grabbed MPEC 2011-C43 - 2011 CO14 - see above
0517Grabbed MPEC 2011-C42 - 2011 BN59 - see above
0429Grabbed MPEC 2011-C41 - 2011 BM59 - see above