Contents  on 15 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 15 January '11

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three updated listings. Of these, two were "one nighters." So far The Tracking News has counted a total of eleven 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 15 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-A73 - "22:52 UT" - 2011 AV55


MPEC 2011-A72 - "16:11 UT" - 2011 AO52


MPEC 2011-A71 - "16:06 UT" - 2011 AN52


MPEC 2011-A70 - "15:58 UT" - 2011 AM52


MPEC 2011-A69 - "15:52 UT" - 2011 AL52


<< DOU on 15 Jan. '11 >>  MPEC 2011-A68 - "07:12 UT" - Daily Orbit Update


MPEC 2011-A67 - "02:17 UT" - Observations and Orbits of Comets

Observers  on 15 January '11

A total of 36 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 10 in MPEC 2011-A67 -- C/2010 X1, P/2010 WK, P/2010 W1, P/2010 V3, C/2009 Y1, C/2008 FK75, C/2007 G1, 240P, 65P, 10P
J24Altamira Obs. in the Canary Islands, 3 in MPEC 2011-A67 -- C/2009 K5, 123P, 103P
J51Atlante Obs. in the Canary Islands, 1 in MPEC 2011-A67 -- P/2010 V3
300Bisei Spaceguard Center in Japan, 2 in MPECs 2011-A67 & 2011-A73 -- 2011 AV55, P/2011 A1
I99Blanquita Obs. in Spain, 1 in MPEC 2011-A68 -- 175706
B96Brixiis Obs. in Belgium, 6 in MPEC 2011-A67 -- C/2010 B1, C/2009 K5, 240P, 123P, 103P, 29P
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2011-A68, 2011-A72 & 2011-A73 -- 2011 AV55, 2011 AO52, 2010 YS, 2007 CA27, 203015, 159609, 137052, 100926, 5869, 4055, 3122
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2011-A67 -- P/2011 A1
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-A67 -- P/2011 A1
F65%T. Lister via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-A70 -- 2011 AM52
H16HUT Obs., 14 in MPEC 2011-A67 -- P/2010 WK, P/2010 V3, C/2010 S1, C/2010 B1, C/2009 Y1, C/2009 K5, C/2008 S3, C/2008 FK75, 240P, 203P, 123P, 65P, 31P, 10P
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-A67 -- P/2010 V1
J28Jaen Obs. in Spain, 3 in MPECs 2011-A67 & 2011-A68 -- P/2010 WK, 2010 VK188, C/2009 K5
704LINEAR in New Mexico, 7 in MPEC 2011-A68 -- 2010 YB, 2010 WE9, 2007 CA27, 2004 BW58, 48603, 40267, 3288
J75La Sagra Obs. in Spain, 2 in MPECs 2011-A67 & 2011-A68 -- C/2005 L3, 2004 FU4
J38La Vara Obs. in Spain, 10 in MPEC 2011-A67 -- P/2011 A1, C/2010 S1, C/2010 B1, C/2009 Y1, 241P, 240P, 223P, 123P, 103P, 29P
J59Linceo Obs. in Spain, 2 in MPEC 2011-A67 -- C/2010 B1, 103P
H01Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2011-A70 & 2011-A72 -- 2011 AO52, 2011 AM52
B90Malina River Obs. in Italy, 1 in MPEC 2011-A67 -- C/2010 G3
213Montcabre Obs. in Spain, 1 in MPEC 2011-A67 -- C/2010 X1
945Monte Deva Obs. in Spain, 3 in MPEC 2011-A67 -- C/2010 B1, 240P, 103P
G96Mt. Lemmon Survey (MLS) in Arizona, 15 in MPECs 2011-A68, 2011-A69, 2011-A70, 2011-A71 & 2011-A73 -- 2011 AV55, 2011 AN52, 2011 AM52, 2011 AL52, 2010 XP51, 2010 LR68, 2005 FE3, 38091, 251346, 143404, 138971, 10115, 8034, 5620, 4183
J47Nazaret Obs. in Spain, 5 in MPEC 2011-A67 -- C/2010 X1, C/2010 B1, 219P, 103P, 10P
I89Nerpio Obs. in Italy, 1 in MPEC 2011-A72 -- 2011 AO52
C23Olmen Obs. in Belgium, 5 in MPEC 2011-A67 -- C/2010 S1, C/2010 B1, C/2009 Y1, 240P, 123P
D92Osaki Obs. in Japan, 7 in MPEC 2011-A67 -- P/2010 WK, P/2010 V3, C/2010 B1, C/2009 Y1, C/2009 K5, 123P, 103P
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-A72 -- 2011 AO52
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPEC 2011-A67 -- P/2011 A1, C/2005 L3
I20Rio Cuarto Obs. in Argentina, 2 in MPECs 2011-A68 & 2011-A72 -- 2011 AO52, 163081
C09Rouet Obs. in France, 3 in MPEC 2011-A67 -- C/2010 B1, 240P, 103P
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-A67 & 2011-A72 -- 2011 AO52, P/2011 A1
204Schiaparelli Obs. in Italy, 17 in MPECs 2011-A67 & 2011-A68 -- 2011 AY22, 2011 AX22, 2011 AN16, 2011 AM1, 2011 AL1, 2011 AA37, P/2010 WK, P/2010 V3, P/2010 U2, P/2010 U1, C/2010 B1, C/2009 K5, C/2007 G1, 2003 YS117, 2001 YM4, 2000 QN130, 1999 TK12
691Spacewatch 0.9m telescope in Arizona, 5 in MPECs 2011-A68 & 2011-A69 -- 2011 AL52, 2010 JH87, 2002 AV31, 2000 QN130, 2000 CR101
291Spacewatch 1.8m telescope in Arizona, 13 in MPECs 2011-A67 & 2011-A68 -- 2011 AX22, 2011 AR26, 2011 AM16, 2011 AA37, P/2011 A1, 2010 XZ72, 2010 XC25, 2010 WZ8, 2010 OP1, C/2010 KW7, 2006 CV, 2005 OJ3, 163697
B18Terskol Obs. in Russia, 1 in MPEC 2011-A67 -- 81P
H10Tzec Maun Obs. Mayhill in New Mexico, 8 in MPECs 2011-A67, 2011-A68 & 2011-A72 -- 2011 AO52, P/2011 A1, P/2010 V3, C/2005 L3, 4954, 103P, 43P, 29P
D96Tzec Maun Obs. Moorook in South Australia, 2 in MPECs 2011-A67 & 2011-A72 -- 2011 AO52, C/2010 FB87
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 15 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 AN52JPL Sentry18002025-206929.2e-10-10.27-10.30JPL: "Analysis based on 13 observations spanning .94606 days (2011-Jan-14.32663 to 2011-Jan-15.27269)." Diameter approximately 0.006 km. from mean, weighted H=28.7.
2011 AM37NEODyS16142048-2090909.43e-04-5.48-5.830NEODyS: "Based on 17 optical observations (of which 0 are rejected as outliers) from 2011-01-13.331 to 2011-01-14.397."
2011 AH37NEODyS16142033-208652.18e-09-5.53-5.60NEODyS: "Based on 23 optical observations (of which 0 are rejected as outliers) from 2011-01-07.157 to 2011-01-14.508."
2011 AA37JPL Sentry1614203611.3e-10-8.88-8.880JPL: "Analysis based on 20 observations spanning 1.1140 days (2011-Jan-13.32845 to 2011-Jan-14.44246)." Diameter approximately 0.084 km. from mean, weighted H=23.0.
NEODyS1614R E M O V E D-
2011 AY22JPL Sentry16142044-2109231.8e-05-5.96-6.570JPL: "Analysis based on 22 observations spanning .83375 days (2011-Jan-11.32922 to 2011-Jan-12.16297)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
NEODyS16142051-208692.2e-06-6.75-7.00NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2011-01-11.330 to 2011-01-12.164."
2011 AX22JPL Sentry16142052-2110506.2e-05-4.18-4.390JPL: "Analysis based on 43 observations spanning 3.8413 days (2011-Jan-10.30552 to 2011-Jan-14.14686)." Diameter approximately 0.037 km. from mean, weighted H=24.8.
NEODyS16142052-2089235.18e-05-4.24-4.40NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2011-01-10.306 to 2011-01-14.148."
2010 XC25JPL Sentry16142050-206335.5e-06-3.14-3.160JPL: "Analysis based on 97 observations spanning 37.138 days (2010-Dec-08.37716 to 2011-Jan-14.51498)." Diameter approximately 0.230 km. from mean, weighted H=20.9.
NEODyS16142050-206335.49e-06-3.14-3.160NEODyS: "Based on 99 optical observations (of which 2 are rejected as outliers) from 2010-12-08.378 to 2011-01-14.516."

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 15 January '11

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

2359Grabbed MPEC 2011-A73 - 2011 AV55 - see above
1800Noted that JPL Sentry has posted 2011 AN52 as an impact risk - see above
1614Noted that JPL Sentry has updated its 2010 XC25 risk assessment - see above
Noted that NEODyS has updated its 2010 XC25 risk assessment - see above
Noted that JPL Sentry has updated its 2011 AA37 risk assessment - see above
Noted that NEODyS has removed 2011 AA37 as an impact risk - see above
Noted that NEODyS has posted 2011 AH37 as an impact risk - see above
Noted that NEODyS has posted 2011 AM37 as an impact risk - 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 AY22 risk assessment - see above
Noted that NEODyS has updated its 2011 AY22 risk assessment - see above
Grabbed MPEC 2011-A68 - Daily Orbit Update - see above
Grabbed MPEC 2011-A69 - 2011 AL52 - see above
Grabbed MPEC 2011-A70 - 2011 AM52 - see above
Grabbed MPEC 2011-A71 - 2011 AN52 - see above
Grabbed MPEC 2011-A72 - 2011 AO52 - see above
0238Grabbed MPEC 2011-A67 - Observations and Orbits of Comets - see above