Contents  on 8 April '10

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.

Radar Astrometry  on 8 April '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 1715 UTC when the database was dated 8 April

NEOCP Activity  on 8 April '10

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, three were "one nighters." The Tracking News counted a total of sixteen listings on the NEOCP at some point on this day.

New MPECs  on 8 April '10

Minor Planet Electronic Circulars

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


MPEC 2010-G51 - "19:23 UT" - 1998 WB2 = 2010 GJ7


MPEC 2010-G50 - "19:01 UT" - 2010 EK139


MPEC 2010-G49 - "17:20 UT" - 2010 EK139


MPEC 2010-G48 - "10:49 UT" - 2010 GT7


MPEC 2010-G47 - "10:47 UT" - 2010 GS7


MPEC 2010-G46 - "10:45 UT" - 2010 GR7


<< DOU on 8 Apr. '10 >>  MPEC 2010-G45 - "06:09 UT" - Daily Orbit Update


MPEC 2010-G44 - "01:04 UT" - Comet C/2010 G1 (Boattini)


MPEC 2010-G43 - "00:58 UT" - Comet C/2010 F4 (Machholz)

Observers  on 8 April '10

A total of 48 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
B17AZT-8 Evpatoria in the Ukraine, 1 in MPEC 2010-G45 -- 68216
349Ageo Obs. in Japan, 1 in MPEC 2010-G44 -- C/2010 G1
251Arecibo in Puerto Rico, 1 in radar -- 8567
H21Astronomical Research Obs. Westfield in Illinois, 1 in MPEC 2010-G44 -- C/2010 G1
C12Berta Obs. in Spain, 1 in MPEC 2010-G44 -- C/2010 G1
493Calar Alto Obs. in Spain, 1 in MPEC 2010-G45 -- 3671
703Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2010-G44, 2010-G45, 2010-G46 & 2010-G48 -- 2010 GT7, 2010 GR7, C/2010 G1, 2004 TB18, 2004 FG11, 4055
G58Chabot Obs. in northern California, 1 in MPEC 2010-G46 -- 2010 GR7
A77Chante-Perdrix Obs. in France, 1 in MPEC 2010-G44 -- C/2010 G1
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2010-G45 -- 2010 GA6
B11Cima Rest Obs. in Italy, 1 in MPEC 2010-G45 -- 2009 UN3
C13Como Obs., 1 in MPEC 2010-G45 -- 2005 YU55
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-G44 -- C/2010 G1
B50Corner Obs. in Germany, 1 in MPEC 2010-G45 -- 433
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 9 in MPECs 2010-G45, 2010-G46 & 2010-G48 -- 2010 GY6, 2010 GT7, 2010 GR7, 2010 GA7, 2010 FD7, 2010 EX119, 2010 EB43, 2010 CD19, 2005 YU55
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2010-G49 -- 2010 EK139
372Geisei Obs. in Japan, 1 in MPEC 2010-G44 -- C/2010 G1
J95Great Shefford Obs. in England, 4 in MPECs 2010-G44, 2010-G45 & 2010-G46 -- 2010 GR7, 2010 GF7, 2010 GA6, C/2010 G1
I96Hyperion Obs., 1 in MPEC 2010-G44 -- C/2010 G1
J28Jaen Obs. in Spain, 1 in MPEC 2010-G45 -- 1917
046Klet Obs. in the Czech Republic, 7 in MPECs 2010-G44, 2010-G45, 2010-G46 & 2010-G48 -- 2010 GZ6, 2010 GT7, 2010 GR7, 2010 GA6, C/2010 G1, 2005 YU55, 2004 FG11
D95Kurihara Obs. in Japan, 1 in MPEC 2010-G43 -- C/2010 F4
704LINEAR in New Mexico, 10 in MPECs 2010-G45, 2010-G46 & 2010-G47 -- 2010 GS7, 2010 GR7, 2010 GF7, 2010 CM44, 88254, 232382, 162998, 159402, 5626, 3554
304Las Campanas Obs. in Chile, 1 in MPEC 2010-G49 -- 2010 EK139
B33Libbiano Obs. in Italy, 1 in MPEC 2010-G45 -- 2005 YU55
560Madonna di Dossobuono Obs. in Italy, 2 in MPEC 2010-G45 -- 2010 CN44, 2006 CX10
H01Magdalena Ridge Obs. (MRO) in New Mexico, 3 in MPECs 2010-G46, 2010-G47 & 2010-G48 -- 2010 GT7, 2010 GS7, 2010 GR7
B82Maidbronn Obs. in Germany, 1 in MPEC 2010-G44 -- C/2010 G1
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2010-G45 -- 2010 FL, 218863
118Modra Obs. in Slovakia, 3 in MPECs 2010-G45, 2010-G46 & 2010-G48 -- 2010 GT7, 2010 GR7, 2010 GF7
A99Monte Baldo Obs. in Italy, 1 in MPEC 2010-G48 -- 2010 GT7
108Montelupo Obs. in Italy, 1 in MPEC 2010-G45 -- 68216
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2010-G45 -- 2010 FT9, 1999 RH33
J93Mt. Tuffley Obs. in England, 1 in MPEC 2010-G45 -- 85839
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2010-G50 -- 2010 EK139
H68Red Barn Obs. in Georgia, 1 in MPEC 2010-G45 -- 218863
473Remanzacco Obs. in Italy, 2 in MPECs 2010-G46 & 2010-G48 -- 2010 GT7, 2010 GR7
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2010-G45, 2010-G46, 2010-G47 & 2010-G48 -- 2010 GT7, 2010 GS7, 2010 GR7, 2010 GA6
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2010-G44 -- C/2010 G1
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-G46 -- 2010 GR7
J84South Obs. in England, 1 in MPEC 2010-G45 -- 218863
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2010-G45 -- 2010 FC81, 38086, 136874, 6050, 4179
291Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2010-G45 & 2010-G46 -- 2010 GZ5, 2010 GY6, 2010 GR7, 2010 GA6, 2010 FY80, 2010 FQ9, 2010 FP9, 2010 FC81, 2010 EW45, 2010 CF19, 2007 CN26, 2006 QA58, 2005 EE, 2002 KL3
A78Stia Obs. in Italy, 3 in MPEC 2010-G45 -- 2010 CM44, 2010 CC180, 68216
A71Stixendorf Obs. in Austria, 2 in MPECs 2010-G43 & 2010-G44 -- C/2010 G1, C/2010 F4
926Tenagra II Obs. in Arizona, 11 in MPECs 2010-G44, 2010-G45 & 2010-G46 -- 2010 GZ6, 2010 GZ5, 2010 GY6, 2010 GU6, 2010 GU5, 2010 GT6, 2010 GR7, 2010 GA7, 2010 GA6, C/2010 G1, 2010 EC43
B18Terskol Obs. in Russia, 1 in MPEC 2010-G43 -- C/2010 F4
A48Verona Obs. in Italy, 2 in MPEC 2010-G45 -- 2010 GA7, 2006 CX10
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 April '10

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
2010 GT7JPL Sentry15152057-2108262.6e-07-4.30-4.690JPL: "Analysis based on 34 observations spanning .86867 days (2010-Apr-07.44183 to 2010-Apr-08.3105)." Diameter approximately 0.298 km. from mean, weighted H=20.3.
2010 GS7JPL Sentry15152067-210642.4e-09-6.89-7.090JPL: "Analysis based on 10 observations spanning .93531 days (2010-Apr-07.31305 to 2010-Apr-08.24836)." Diameter approximately 0.190 km. from mean, weighted H=21.2.
2010 GH7NEODyS15162057-2090871.41e-05-6.40-7.330NEODyS: "Based on 14 optical observations (of which 1 are rejected as outliers) from 2010/04/07.387 to 2010/04/07.479."
2010 GY6JPL Sentry1515R E M O V E DJPL: Risk listing removed at 0951 UTC.
2010 GA6NEODyS1515R E M O V E D-
JPL Sentry1515R E M O V E DJPL: Risk listing removed at 0952 UTC.
2005 YU55NEODyS20492062-2109781.41e-05-3.50-4.230NEODyS: "Based on 201 optical observations (of which 1 are rejected as outliers) from 2005/12/24.299 to 2010/04/07.903."

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 April '10

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

2049Noted that NEODyS has updated its 2005 YU55 risk assessment - see above
Grabbed MPEC 2010-G50 - 2010 EK139 - see above
Grabbed MPEC 2010-G51 - 1998 WB2 = 2010 GJ7 - see above
1847Grabbed MPEC 2010-G49 - 2010 EK139 - see above
1715Noted Radar Astrometry database update - see above
1516Grabbed MPEC 2010-G45 - Daily Orbit Update - see above
Grabbed MPEC 2010-G46 - 2010 GR7 - see above
Grabbed MPEC 2010-G47 - 2010 GS7 - see above
Grabbed MPEC 2010-G48 - 2010 GT7 - see above
1515Noted that JPL Sentry has removed 2010 GA6 as an impact risk - see above
Noted that NEODyS has removed 2010 GA6 as an impact risk - see above
Noted that NEODyS has posted 2010 GH7 as an impact risk - see above
Noted that JPL Sentry has posted 2010 GS7 as an impact risk - see above
Noted that JPL Sentry has posted 2010 GT7 as an impact risk - see above
Noted that JPL Sentry has removed 2010 GY6 as an impact risk - see above
0130Grabbed MPEC 2010-G43 - Comet C/2010 F4 (Machholz) - see above
Grabbed MPEC 2010-G44 - Comet C/2010 G1 (Boattini) - see above