Contents  on 7 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 7 April '10

The MPC's NEO Confirmation Page has 8 listings: 1 new, 7 updated

When last checked at 2330 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and seven updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of thirteen 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 7 April '10

Minor Planet Electronic Circulars

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


MPEC 2010-G42 - "21:57 UT" - 2010 GJ7


MPEC 2010-G41 - "20:04 UT" - 2005 GY110


MPEC 2010-G40 - "14:35 UT" - Comet C/2010 E5 (Scotti)


MPEC 2010-G39 - "13:22 UT" - 2010 GH7


MPEC 2010-G38 - "12:48 UT" - 2010 GG7


MPEC 2010-G37 - "12:45 UT" - 2010 GF7


<< DOU on 7 Apr. '10 >>  MPEC 2010-G36 - "06:09 UT" - Daily Orbit Update


MPEC 2010-G35 - "00:10 UT" - 2010 GZ6


MPEC 2010-G34 - "00:08 UT" - 2010 GA7


MPEC 2010-G33 - "00:06 UT" - 2010 GY6

Observers  on 7 April '10

A total of 37 observing facilities appear in today's MPECs.

CodeObserver / observatory
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 17 in MPEC 2010-G36 -- 2010 GZ5, 2010 GU5, 2010 GC6, 2010 GA6, 2010 FX9, 2010 FC81, 2010 EZ45, 2010 EK44, 2010 EE43, 2010 CC180, 2009 UV18, 2007 JZ20, 2006 UR, 2005 YU55, 2001 HC, 161998, 153814
J51Atlante Obs. in the Canary Islands, 2 in MPEC 2010-G36 -- 2010 DB34, 54789
B75Betelgeuse Station in Italy, 6 in MPEC 2010-G36 -- 2010 CM44, 85839, 68216, 54789, 3554, 1627
215Buchloe Obs. in Germany, 1 in MPEC 2010-G40 -- C/2010 E5
160Castelmartini Obs. in Italy, 13 in MPECs 2010-G34 & 2010-G36 -- 2010 GA7, 2004 TB18, 2004 FG11, 85839, 68359, 40267, 220124, 152558, 11066, 4055, 3671, 3554, 1627
703Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2010-G33, 2010-G34, 2010-G35, 2010-G36, 2010-G39 & 2010-G42 -- 2010 GZ6, 2010 GY6, 2010 GJ7, 2010 GH7, 2010 GD6, 2010 GA7, 2010 EZ45, 2009 SX1, 2003 HS42, 90367, 68359, 163132, 143678, 2212, 1036
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2010-G40 -- C/2010 E5
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-G36 -- 11066
J04ESA Optical Ground Station (ESA OGS) in the Canary Islands, 4 in MPECs 2010-G36 & 2010-G38 -- 2010 GZ6, 2010 GG7, 2010 CN1, 2009 WF104
151Eschenberg Obs. in Switzerland, 4 in MPEC 2010-G36 -- 2010 FR, 2010 DB34, 2005 YU55, 1998 KN3
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2010-G34 & 2010-G35 -- 2010 GZ6, 2010 GA7
B23Fiamene Obs. in Italy, 5 in MPEC 2010-G36 -- 2010 DB34, 2010 CN44, 220124, 218863, 7822
157Frasso Sabino Obs. in Italy, 1 in MPEC 2010-G34 -- 2010 GA7
143Gnosca Obs. in Switzerland, 1 in MPEC 2010-G34 -- 2010 GA7
J95Great Shefford Obs. in England, 1 in MPEC 2010-G42 -- 2010 GJ7
240Herrenberg Obs. in Germany, 1 in MPEC 2010-G36 -- 85839
B15Inastars Obs. in Germany, 1 in MPEC 2010-G34 -- 2010 GA7
046Klet Obs. in the Czech Republic, 4 in MPECs 2010-G34, 2010-G35 & 2010-G36 -- 2010 GZ6, 2010 GA7, 2005 YU55, 2004 FG11
704LINEAR in New Mexico, 8 in MPECs 2010-G36 & 2010-G37 -- 2010 GF7, 2010 GA7, 2010 CL18, 85839, 220124, 218863, 159402, 3671
H13Lenomiya Obs. in Arizona, 1 in MPEC 2010-G36 -- 2005 YU55
B33Libbiano Obs. in Italy, 1 in MPEC 2010-G36 -- 2005 YU55
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-G36 -- 2006 HY51
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2010-G36 & 2010-G38 -- 2010 GG7, 2010 CM44, 2001 XF1, 232368
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2010-G36 -- 2010 DB34, 2006 CX10, 2005 YU55
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-G37 -- 2010 GF7
473Remanzacco Obs. in Italy, 3 in MPECs 2010-G37, 2010-G38 & 2010-G40 -- 2010 GG7, 2010 GF7, C/2010 E5
854Sabino Canyon Obs. in Arizona, 4 in MPECs 2010-G33, 2010-G35, 2010-G37 & 2010-G42 -- 2010 GZ6, 2010 GY6, 2010 GJ7, 2010 GF7
B04Saint-Barthelemy Obs. in Italy, 3 in MPECs 2010-G34, 2010-G35 & 2010-G38 -- 2010 GZ6, 2010 GG7, 2010 GA7
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2010-G34 -- 2010 GA7
H36Sandlot Obs. in Kansas, 1 in MPEC 2010-G37 -- 2010 GF7
204Schiaparelli Obs. in Italy, 5 in MPECs 2010-G33, 2010-G35 & 2010-G36 -- 2010 GZ6, 2010 GY6, 2005 YU55, 2004 FG11, 2001 HC
587Sormano Obs. in Italy, 4 in MPECs 2010-G34, 2010-G35, 2010-G36 & 2010-G38 -- 2010 GZ6, 2010 GG7, 2010 GA7, 2005 YU55
691Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2010-G36 & 2010-G38 -- 2010 GZ5, 2010 GG7, 2008 DK5, 2000 TJ1, 186822, 138095
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2010-G36, 2010-G39 & 2010-G40 -- 2010 GY6, 2010 GH7, 2010 GB6, 2010 FP9, 2010 FC81, 2010 FB10, 2010 EQ43, 2010 EK44, 2010 EH20, C/2010 E5, 2005 YU55
926Tenagra II Obs. in Arizona, 9 in MPECs 2010-G34, 2010-G36, 2010-G37, 2010-G38, 2010-G39 & 2010-G41 -- 2010 GH7, 2010 GG7, 2010 GF7, 2010 GC6, 2010 GB6, 2010 GA7, 2010 GA6, 2010 FA6, 2005 GY110
B18Terskol Obs. in Russia, 1 in MPEC 2010-G33 -- 2010 GY6
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2010-G36 -- 163243, 3554
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 7 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 GH7JPL Sentry16582013-21103471.3e-04-5.53-6.560JPL: "Analysis based on 14 observations spanning .09240 days (2010-Apr-07.38604 to 2010-Apr-07.47844)." Diameter approximately 0.011 km. from mean, weighted H=27.5.
2010 GY6JPL Sentry14112025-2080142.4e-09-5.67-6.090JPL #2 for the day: "Analysis based on 18 observations spanning .95420 days (2010-Apr-06.21573 to 2010-Apr-07.16993)." Diameter approximately 0.470 km. from mean, weighted H=19.3.
2010 GD6JPL Sentry14112099-210152.9e-08-7.30-7.410JPL: "Analysis based on 21 observations spanning .94987 days (2010-Apr-05.25856 to 2010-Apr-06.20843)." Diameter approximately 0.056 km. from mean, weighted H=23.9.
NEODyS1412R E M O V E D-
2010 GB6NEODyS1412R E M O V E D-
2010 GA6NEODyS14122064-209041.76e-07-7.24-7.310NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2010/04/05.166 to 2010/04/06.246."
JPL Sentry1411207411.6e-07-7.28-7.280JPL: "Analysis based on 19 observations spanning 1.0796 days (2010-Apr-05.16553 to 2010-Apr-06.24509)." Diameter approximately 0.023 km. from mean, weighted H=25.8.
2010 FC81NEODyS1412R E M O V E D-
JPL Sentry1411R E M O V E DJPL: Risk listing removed at 0950 UTC.
2005 YU55NEODyS14122043-21091071.76e-04-2.42-2.750NEODyS: "Based on 147 optical observations (of which 1 are rejected as outliers) from 2005/12/24.299 to 2010/04/06.035."
153814 2001 WN5NEODyS14122106-213354.38e-07-3.56-3.600NEODyS: "Based on 138 optical observations (of which 4 are rejected as outliers) from 1996/02/10.397 to 2010/04/06.337."

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 7 April '10

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

2301Grabbed MPEC 2010-G42 - 2010 GJ7 - see above
2202Grabbed MPEC 2010-G41 - 2005 GY110 - see above
1658Noted that JPL Sentry has posted 2010 GH7 as an impact risk - see above
1536Grabbed MPEC 2010-G40 - Comet C/2010 E5 (Scotti) - see above
1412Noted that NEODyS has updated its 153814 2001 WN5 risk assessment - see above
Noted that NEODyS has updated its 2005 YU55 risk assessment - see above
Noted that NEODyS has removed 2010 FC81 as an impact risk - see above
Noted that NEODyS has updated its 2010 GA6 risk assessment - see above
Noted that NEODyS has removed 2010 GB6 as an impact risk - see above
Noted that NEODyS has removed 2010 GD6 as an impact risk - see above
Grabbed MPEC 2010-G36 - Daily Orbit Update - see above
Grabbed MPEC 2010-G37 - 2010 GF7 - see above
Grabbed MPEC 2010-G38 - 2010 GG7 - see above
Grabbed MPEC 2010-G39 - 2010 GH7 - see above
1411Noted that JPL Sentry has removed 2010 FC81 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 GA6 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GD6 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GY6 risk assessment - see above
0207Noted that JPL Sentry has posted 2010 GY6 as an impact risk - see above
0026Grabbed MPEC 2010-G33 - 2010 GY6 - see above
Grabbed MPEC 2010-G34 - 2010 GA7 - see above
Grabbed MPEC 2010-G35 - 2010 GZ6 - see above