Contents  on 11 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.

NEOCP Activity  on 11 April '10

The MPC's NEO Confirmation Page has 14 listings: 6 new, 8 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and eight updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of nineteen 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 11 April '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2010-G86 - "22:00 UT" - 2007 GF


MPEC 2010-G85 - "17:47 UT" - 2010 GJ30


MPEC 2010-G84 - "17:37 UT" - 2010 GH30


MPEC 2010-G83 - "17:00 UT" - 2010 GF30


MPEC 2010-G82 - "16:53 UT" - 2010 GE30


<< DOU on 11 Apr. '10 >>  MPEC 2010-G81 - "06:13 UT" - Daily Orbit Update

Observers  on 11 April '10

A total of 32 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 17 in MPECs 2010-G81, 2010-G82, 2010-G83, 2010-G84 & 2010-G85 -- 2010 GT7, 2010 GT6, 2010 GS7, 2010 GJ30, 2010 GH30, 2010 GF30, 2010 GE30, 2010 GD6, 2010 GC6, 2010 GB6, 2010 GA7, 2010 EB43, 2010 CL18, 2008 AF4, 2005 YU55, 2004 OB, 2003 CH11
J51Atlante Obs. in the Canary Islands, 3 in MPEC 2010-G81 -- 2005 YU55, 85839, 3554
B88Bigmuskie Obs. in Italy, 1 in MPEC 2010-G81 -- 2010 GS7
I99Blanquita Obs. in Spain, 1 in MPEC 2010-G81 -- 85839
160Castelmartini Obs. in Italy, 8 in MPEC 2010-G81 -- 2010 DB34, 2010 CL18, 2006 CX10, 85839, 232382, 218863, 162998, 142464
703Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2010-G81 -- 2010 GS7, 2010 CN44, 2009 UK, 2008 GG2, 2005 YU55, 88254, 11066, 8567, 3671
C13Como Obs., 2 in MPEC 2010-G81 -- 2010 GU21, 2005 YU55
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-G84 -- 2010 GH30
448Desert Moon Obs. in New Mexico, 9 in MPEC 2010-G81 -- 2010 GZ6, 2010 GY6, 2010 GU6, 2010 GT7, 2010 GT6, 2010 GS7, 2010 GR7, 2009 KD5, 141525
B23Fiamene Obs. in Italy, 2 in MPEC 2010-G81 -- 2010 DB34, 7822
704LINEAR in New Mexico, 12 in MPECs 2010-G81 & 2010-G84 -- 2010 GU6, 2010 GM23, 2010 GH30, 2010 GA24, 2010 DB34, 2003 HS42, 27346, 218863, 20790, 11066, 5626, 1917
J87La Canada Obs. in Spain, 1 in MPEC 2010-G81 -- 2010 GS7
H13Lenomiya Obs. in Arizona, 2 in MPEC 2010-G81 -- 2010 GA7, 2005 YU55
B33Libbiano Obs. in Italy, 1 in MPEC 2010-G81 -- 2005 YU55
J59Linceo Obs. in Spain, 2 in MPEC 2010-G81 -- 2005 YU55, 1036
844Los Molinos Obs. in Uruguay, 2 in MPEC 2010-G81 -- 2010 GU21, 2005 YU55
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2010-G81, 2010-G82, 2010-G83, 2010-G84 & 2010-G85 -- 2010 GJ30, 2010 GH7, 2010 GH30, 2010 GF30, 2010 GE30
A06Mataro Obs. in Spain, 3 in MPEC 2010-G81 -- 2005 YU55, 11066, 3554
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2010-G81, 2010-G82, 2010-G83 & 2010-G85 -- 2010 GS7, 2010 GJ30, 2010 GF30, 2010 GE30, 2002 CF26, 2001 XV10, 85490, 136618
716Palmer Divide Obs. in Colorado, 1 in MPEC 2010-G81 -- 2005 YU55
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2010-G81 -- 2010 GU21, 2010 DB34, 2005 YU55
473Remanzacco Obs. in Italy, 2 in MPECs 2010-G83 & 2010-G84 -- 2010 GH30, 2010 GF30
I20Rio Cuarto Obs. in Argentina, 4 in MPEC 2010-G81 -- 2010 GZ6, 2010 GT6, 2010 GS7, 2010 FD7
H11Rodeo Obs. in New Mexico, 1 in MPEC 2010-G81 -- 2010 GS7
587Sormano Obs. in Italy, 1 in MPEC 2010-G81 -- 2010 GS7
291Spacewatch 1.8m telescope in Arizona, 8 in MPEC 2010-G81 -- 2010 GZ5, 2010 GT7, 2010 GJ23, 2010 FP9, 2010 FF10, 2010 FC6, 2010 EQ43, 2005 BG14
I19Tanti Obs. in Argentina, 1 in MPEC 2010-G81 -- 2010 EH43
926Tenagra II Obs. in Arizona, 15 in MPECs 2010-G81, 2010-G82, 2010-G83, 2010-G84, 2010-G85 & 2010-G86 -- 2010 GY6, 2010 GT6, 2010 GS7, 2010 GR7, 2010 GM23, 2010 GL23, 2010 GJ30, 2010 GH7, 2010 GH30, 2010 GF30, 2010 GE30, 2010 GD6, 2010 GC6, 2010 GB6, 2007 GF
H53Thompsonville Obs. in Illinois, 6 in MPEC 2010-G81 -- 88254, 54789, 218863, 3554, 1627, 433
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-G81 -- 218863
C51WISE in Earth polar orbit, 1 in MPEC 2010-G81 -- 2009 WX51
718Wiggins Obs. in Utah, 1 in MPEC 2010-G81 -- 2005 YU55
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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 GM23JPL Sentry14452086-2109212.9e-05-4.62-5.110JPL: "Analysis based on 47 observations spanning 2.0272 days (2010-Apr-08.31133 to 2010-Apr-10.33853)." Diameter approximately 0.038 km. from mean, weighted H=24.7.
NEODyS1445208724.23e-07-6.37-6.370NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2010/04/08.312 to 2010/04/10.339."
2010 GT7JPL Sentry1445209611.9e-09-6.62-6.620JPL: "Analysis based on 63 observations spanning 2.9840 days (2010-Apr-07.44183 to 2010-Apr-10.42579)." Diameter approximately 0.280 km. from mean, weighted H=20.4.
2010 GH7JPL Sentry14452099-2110231.1e-04-5.59-6.030JPL: "Analysis based on 39 observations spanning 3.1093 days (2010-Apr-07.38604 to 2010-Apr-10.49538)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
2010 FF10NEODyS1445R E M O V E D-
JPL Sentry1445R E M O V E DJPL: Risk listing removed at 1050 UTC.
2005 YU55NEODyS20002055-2109639.75e-06-3.63-4.270NEODyS: "Based on 354 optical observations (of which 2 are rejected as outliers) from 2005/12/24.299 to 2010/04/10.986."

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 April '10

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

2304Grabbed MPEC 2010-G86 - 2007 GF - see above
2000Noted that NEODyS has updated its 2005 YU55 risk assessment - see above
Grabbed MPEC 2010-G82 - 2010 GE30 - see above
Grabbed MPEC 2010-G83 - 2010 GF30 - see above
Grabbed MPEC 2010-G84 - 2010 GH30 - see above
Grabbed MPEC 2010-G85 - 2010 GJ30 - see above
1445Noted that JPL Sentry has removed 2010 FF10 as an impact risk - see above
Noted that NEODyS has removed 2010 FF10 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 GH7 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GM23 risk assessment - see above
Noted that NEODyS has updated its 2010 GM23 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GT7 risk assessment - see above
Grabbed MPEC 2010-G81 - Daily Orbit Update - see above