Arecibo radar April 2010 image of 2005 YU55
Credit: NASA/Cornell/Arecibo

The NASA/JPL NEO Program Office started lining up support yesterday for a 2005 YU55 observing campaign to include radar, infrared, and visual observations when this object flies through the Earth-Moon system this coming November. It was already caught once by Arecibo, as seen here from last April. Radar imagery credit: NASA/Cornell/Arecibo.


Contents  on 11 March '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 11 March '11

The MPC's NEO Confirmation Page has 6 listings: 1 new, 5 updated

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

Minor Planet Electronic Circulars

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


MPEC 2011-E67 - "19:57 UT" - Editorial Notice


MPEC 2011-E66 - "15:07 UT" - 2011 EE41


MPEC 2011-E65 - "14:53 UT" - 2011 ED41


MPEC 2011-E64 - "14:47 UT" - 2011 EC41


MPEC 2011-E63 - "14:41 UT" - 2011 EB41


MPEC 2011-E62 - "14:35 UT" - 2011 EZ40


<< DOU on 11 Mar. '11 >>  MPEC 2011-E61 - "07:10 UT" - Daily Orbit Update


MPEC 2011-E60 - "00:34 UT" - 2011 EP40


MPEC 2011-E59 - "00:29 UT" - 2011 EO40


MPEC 2011-E58 - "00:23 UT" - 2011 EN40

Observers  on 11 March '11

A total of 25 observers appear in today's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2011-E61 -- 145656
H17Angel Peaks Obs. in Colorado, 1 in MPEC 2011-E61 -- 2011 BE38
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPECs 2011-E62, 2011-E63, 2011-E64, 2011-E65 & 2011-E66 -- 2011 EZ40, 2011 EE41, 2011 ED41, 2011 EC41, 2011 EB41
A81Balzaretto Obs. in Italy, 2 in MPEC 2011-E61 -- 2011 CG2, 2011 AN16
160Castelmartini Obs. in Italy, 6 in MPEC 2011-E61 -- 2011 BO59, 2011 AN16, 68350, 23187, 18882, 3122
703Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2011-E61, 2011-E63 & 2011-E65 -- 2011 EG17, 2011 ED41, 2011 ED12, 2011 EB41, 2011 DU, 2011 CH71, 2005 EY169, 163250, 162781, 3199, 1864
448Desert Moon Obs. in New Mexico, 7 in MPEC 2011-E61 -- 2011 EG17, 2011 ED12, 2011 AN16, 2011 AL52, 2004 FG1, 163412, 162421
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-E63 -- 2011 EB41
A27Eridanus Obs. in Germany, 1 in MPEC 2011-E61 -- 3122
651Grasslands Obs. in Arizona, 4 in MPECs 2011-E62, 2011-E63, 2011-E64 & 2011-E65 -- 2011 EZ40, 2011 ED41, 2011 EC41, 2011 EB41
J95Great Shefford Obs. in England, 7 in MPECs 2011-E58, 2011-E59, 2011-E60, 2011-E61, 2011-E63, 2011-E64 & 2011-E65 -- 2011 EU20, 2011 EP40, 2011 EO40, 2011 EN40, 2011 ED41, 2011 EC41, 2011 EB41
704LINEAR in New Mexico, 15 in MPECs 2011-E61, 2011-E63, 2011-E64 & 2011-E65 -- 2011 EW29, 2011 ED41, 2011 EC41, 2011 EB41, 2011 BO59, 2009 FY4, 2003 TN1, 2002 TD60, 85990, 40267, 265196, 215167, 163412, 15745, 152889
H01Magdalena Ridge Obs. (MRO) in New Mexico, 12 in MPECs 2011-E58, 2011-E59, 2011-E60, 2011-E61, 2011-E62, 2011-E63, 2011-E64, 2011-E65 & 2011-E66 -- 2011 EZ40, 2011 EP40, 2011 EO40, 2011 EN40, 2011 EE41, 2011 ED41, 2011 EC41, 2011 EB41, 2011 EB, 2011 DV10, 2011 DU9, 2010 QE2
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-E61 -- 2011 CY6
152Moletai Obs. in Lithuania, 1 in MPEC 2011-E61 -- 2011 EU20
G96Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2011-E58, 2011-E59, 2011-E60, 2011-E61 & 2011-E66 -- 2011 EP40, 2011 EO40, 2011 EN40, 2011 EE41, 2004 BE11, 2003 CA, 40267, 187040, 175729, 163252, 7474
A13Naef Obs. in Switzerland, 1 in MPEC 2011-E61 -- 40267
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-E62 -- 2011 EZ40
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-E61 -- 2011 DU
H36Sandlot Obs. in Kansas, 5 in MPECs 2011-E58, 2011-E62, 2011-E64, 2011-E65 & 2011-E66 -- 2011 EZ40, 2011 EN40, 2011 EE41, 2011 ED41, 2011 EC41
691Spacewatch 0.9m telescope in Arizona, 7 in MPEC 2011-E61 -- 2011 CY6, 2007 MR, 2001 QP181, 31210, 250706, 164222, 159635
291Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2011-E61 & 2011-E62 -- 2011 EZ40, 2011 EW4, 2011 EU29, 2011 EL11, 2011 EG17, 2011 EF17, 2011 EF15, 2011 EC7, 2011 DU9, 2011 DS, 2010 XY82, 2010 LN14, 2010 LL34, 2009 DQ4, 152671
G52Stone Edge Obs., 1 in MPEC 2011-E61 -- 1999 TK12
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-E63 -- 2011 EB41
C44Volta Obs. in Italy, 2 in MPECs 2011-E58 & 2011-E60 -- 2011 EP40, 2011 EN40
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 March '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 EO40NEODyS16262013-2089591.01e-07-5.42-6.40NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2011-03-10.217 to 2011-03-10.914."
JPL Sentry02202018-21101382.7e-07-5.12-6.140JPL: "Analysis based on 11 observations spanning .69682 days (2011-Mar-10.21653 to 2011-Mar-10.91335)." Diameter approximately 0.140 km. from mean, weighted H=21.9.
2011 EM40NEODyS23102018-2089941.52e-06-7.09-7.790NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2011-03-10.379 to 2011-03-10.457."
2011 EL40NEODyS16252062-2088172.83e-07-7.07-7.50NEODyS: "Based on 25 optical observations (of which 2 are rejected as outliers) from 2011-03-10.242 to 2011-03-10.452."
2011 EK40NEODyS16252026-2089132.81e-09-8.66-8.960NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2011-03-10.215 to 2011-03-10.392."
2011 EU29NEODyS16262016-2089732.48e-07-3.91-4.740NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2011-03-08.201 to 2011-03-11.271."
JPL Sentry16252016-2110394.7e-07-3.71-4.230JPL: "Analysis based on 49 observations spanning 3.0699 days (2011-Mar-08.20041 to 2011-Mar-11.27036)." Diameter approximately 0.367 km. from mean, weighted H=19.8.
2011 EF17JPL Sentry16252018-2104342.3e-07-2.93-3.090JPL: "Analysis based on 29 observations spanning 5.8934 days (2011-Mar-05.24819 to 2011-Mar-11.1416)." Diameter approximately 0.505 km. from mean, weighted H=19.1.
NEODyS16252018-2087231.2e-07-3.23-3.420NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2011-03-05.249 to 2011-03-11.142."
2011 EL11JPL Sentry16252023-2110841.6e-06-3.12-3.980JPL: "Analysis based on 20 observations spanning 6.0775 days (2011-Mar-04.30394 to 2011-Mar-10.38141)." Diameter approximately 0.349 km. from mean, weighted H=19.9.
NEODyS16252023-2090661.46e-06-3.13-3.940NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2011-03-04.305 to 2011-03-10.382."
2011 EBJPL Sentry16252070-207732.9e-05-5.62-5.700JPL: "Analysis based on 39 observations spanning 9.0560 days (2011-Mar-01.38036 to 2011-Mar-10.43633)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
NEODyS16252070-207732.81e-05-5.63-5.720NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2011-03-01.381 to 2011-03-10.437."
2011 DV10JPL Sentry1625209311.7e-06-5.74-5.740JPL: "Analysis based on 27 observations spanning 12.048 days (2011-Feb-26.30148 to 2011-Mar-10.34995)." Diameter approximately 0.038 km. from mean, weighted H=24.8.
2011 DU9JPL Sentry16252043-205952.0e-04-4.46-4.470JPL: "Analysis based on 61 observations spanning 11.421 days (2011-Feb-27.01686 to 2011-Mar-10.43825)." Diameter approximately 0.016 km. from mean, weighted H=26.7.
NEODyS16252046-205941.94e-04-4.46-4.470NEODyS: "Based on 61 optical observations (of which 0 are rejected as outliers) from 2011-02-27.018 to 2011-03-10.439."
2011 DSJPL Sentry16252074-2108171.6e-05-6.09-6.340JPL: "Analysis based on 74 observations spanning 14.967 days (2011-Feb-23.39905 to 2011-Mar-10.3663)." Diameter approximately 0.013 km. from mean, weighted H=27.0.
NEODyS16252065-2084121.29e-05-6.15-6.340NEODyS: "Based on 74 optical observations (of which 0 are rejected as outliers) from 2011-02-23.400 to 2011-03-10.367."
2008 EF32JPL Sentry02202022-208336.8e-08-9.09-9.330JPL: "Analysis based on 8 observations spanning .12271 days (2008-Mar-11.35979 to 2008-Mar-11.4825)." Diameter approximately 0.004 km. from mean, weighted H=29.4.

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 11 March '11

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

2310Noted that NEODyS has posted 2011 EM40 as an impact risk - see above
2106Grabbed MPEC 2011-E67 - Editorial Notice - see above
1626Noted that NEODyS has updated its 2011 EU29 risk assessment - see above
1625Noted that JPL Sentry has updated its 2011 DS risk assessment - see above
Noted that NEODyS has updated its 2011 DS risk assessment - see above
Noted that JPL Sentry has updated its 2011 DU9 risk assessment - see above
Noted that NEODyS has updated its 2011 DU9 risk assessment - see above
Noted that JPL Sentry has updated its 2011 DV10 risk assessment - see above
Noted that JPL Sentry has updated its 2011 EB risk assessment - see above
Noted that NEODyS has updated its 2011 EB risk assessment - see above
Noted that JPL Sentry has updated its 2011 EF17 risk assessment - see above
Noted that NEODyS has updated its 2011 EF17 risk assessment - see above
Noted that NEODyS has posted 2011 EK40 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 EL11 risk assessment - see above
Noted that NEODyS has updated its 2011 EL11 risk assessment - see above
Noted that NEODyS has posted 2011 EL40 as an impact risk - see above
Noted that NEODyS has posted 2011 EO40 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 EU29 risk assessment - see above
Grabbed MPEC 2011-E61 - Daily Orbit Update - see above
Grabbed MPEC 2011-E62 - 2011 EZ40 - see above
Grabbed MPEC 2011-E63 - 2011 EB41 - see above
Grabbed MPEC 2011-E64 - 2011 EC41 - see above
Grabbed MPEC 2011-E65 - 2011 ED41 - see above
Grabbed MPEC 2011-E66 - 2011 EE41 - see above
0220Noted that JPL Sentry has updated its 2008 EF32 risk assessment - see above
Noted that JPL Sentry has posted 2011 EO40 as an impact risk - see above
0050Grabbed MPEC 2011-E58 - 2011 EN40 - see above
Grabbed MPEC 2011-E59 - 2011 EO40 - see above
Grabbed MPEC 2011-E60 - 2011 EP40 - see above