Contents  on 12 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 12 April '10

The MPC's NEO Confirmation Page has 9 listings: 4 new, 5 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and five updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of 21 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 12 April '10

Minor Planet Electronic Circulars

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


MPEC 2010-G97 - "22:45 UT" - 2010 ER65, 2010 ES65, 2010 FB49, 2010 FC49, 2010 FD49, 2010 FE49


MPEC 2010-G96 - "21:57 UT" - 2010 GA34


MPEC 2010-G95 - "20:20 UT" - 2009 SO103


MPEC 2010-G94 - "19:55 UT" - 2010 GZ33


MPEC 2010-G93 - "16:28 UT" - 2007 TO74


MPEC 2010-G92 - "11:32 UT" - 2010 GR33


MPEC 2010-G91 - "11:30 UT" - 2010 GQ33


MPEC 2010-G90 - "11:27 UT" - 2010 GP33


MPEC 2010-G89 - "11:25 UT" - 2010 GO33


<< DOU on 12 Apr. '10 >>  MPEC 2010-G88 - "06:11 UT" - Daily Orbit Update


MPEC 2010-G87 - "01:56 UT" - Comet C/2010 G2 (Hill)

Observers  on 12 April '10

A total of 41 observing facilities appear in today's MPECs.

CodeObserver / observatory
J16An Carraig Obs. in Northern Ireland, 1 in MPEC 2010-G88 -- 2005 YU55
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 12 in MPECs 2010-G87, 2010-G88, 2010-G89, 2010-G90, 2010-G91, 2010-G92 & 2010-G94 -- 2010 GZ6, 2010 GZ33, 2010 GU5, 2010 GU21, 2010 GR33, 2010 GQ33, 2010 GP33, 2010 GO33, 2010 GL23, 2010 GJ7, 2010 GH7, C/2010 G2
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2010-G89 -- 2010 GO33
I99Blanquita Obs. in Spain, 1 in MPEC 2010-G88 -- 2005 YU55
160Castelmartini Obs. in Italy, 7 in MPEC 2010-G88 -- 2010 GJ7, 2009 XC2, 2004 TB18, 68359, 68216, 152558, 141531
703Catalina Sky Survey (CSS) in Arizona, 12 in MPECs 2010-G87, 2010-G88, 2010-G89 & 2010-G96 -- 2010 GO33, 2010 GA34, C/2010 G2, 2010 FL, 2006 CX10, 2000 WQ19, 89959, 86067, 40267, 36183, 220124, 207945
807Cerro Tololo Inter-American Obs. (CTIO) in Chile, 6 in MPEC 2010-G97 -- 2010 FE49, 2010 FD49, 2010 FC49, 2010 FB49, 2010 ES65, 2010 ER65
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-G87 -- C/2010 G2
448Desert Moon Obs. in New Mexico, 6 in MPEC 2010-G88 -- 2010 GU21, 2010 FF10, 2010 FA81, 2010 EF21, 2010 DE, 68359
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 5 in MPEC 2010-G88 -- 2010 GU21, 2010 GS7, 2010 GM23, 2010 GA24, 1998 WB2
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2010-G87 -- C/2010 G2
J95Great Shefford Obs. in England, 2 in MPECs 2010-G90 & 2010-G96 -- 2010 GP33, 2010 GA34
G92Jarnac Obs. in Arizona, 1 in MPEC 2010-G88 -- 232382
704LINEAR in New Mexico, 15 in MPECs 2010-G87 & 2010-G88 -- 2010 GU6, 2010 GT7, 2010 GH30, 2010 GA7, C/2010 G2, 2010 FP, 2010 CN44, 2004 TB18, 2004 RK, 1999 HW1, 68359, 232382, 142464, 4055, 3554
H13Lenomiya Obs. in Arizona, 2 in MPEC 2010-G88 -- 2010 GA7, 2005 YU55
B33Libbiano Obs. in Italy, 1 in MPEC 2010-G87 -- C/2010 G2
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-G88 -- 2010 CM44
H01Magdalena Ridge Obs. (MRO) in New Mexico, 11 in MPECs 2010-G87, 2010-G88, 2010-G89, 2010-G90, 2010-G91, 2010-G92, 2010-G94 & 2010-G96 -- 2010 GZ33, 2010 GR33, 2010 GQ33, 2010 GP33, 2010 GO33, 2010 GM23, 2010 GK23, 2010 GA34, 2010 GA24, C/2010 G2, 2010 FX80
711McDonald Obs. in Texas, 4 in MPEC 2010-G88 -- 2010 GS7, 2005 YU55, 68216, 175706
118Modra Obs. in Slovakia, 1 in MPEC 2010-G89 -- 2010 GO33
G96Mt. Lemmon Survey (MLS) in Arizona, 8 in MPECs 2010-G87, 2010-G88, 2010-G89, 2010-G90, 2010-G92 & 2010-G94 -- 2010 GZ33, 2010 GR33, 2010 GP33, 2010 GO33, C/2010 G2, 2007 UR3, 2006 AO4, 232382
716Palmer Divide Obs. in Colorado, 1 in MPEC 2010-G88 -- 2005 YU55
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2010-G88 -- 2010 DB34, 2005 YU55, 2000 CO101, 1998 WB2
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-G87 -- C/2010 G2
H066Andrew Lowe in Alberta via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-G95 -- 2009 SO103
473Remanzacco Obs. in Italy, 2 in MPECs 2010-G89 & 2010-G90 -- 2010 GP33, 2010 GO33
H11Rodeo Obs. in New Mexico, 2 in MPECs 2010-G87 & 2010-G89 -- 2010 GO33, C/2010 G2
H36Sandlot Obs. in Kansas, 3 in MPECs 2010-G89, 2010-G90 & 2010-G92 -- 2010 GR33, 2010 GP33, 2010 GO33
204Schiaparelli Obs. in Italy, 4 in MPEC 2010-G88 -- 2010 GB6, 2010 GA6, 2005 YU55, 1998 WB2
587Sormano Obs. in Italy, 1 in MPEC 2010-G88 -- 2010 EK44
J26Spaceguard Centre in Wales, 1 in MPEC 2010-G88 -- 2005 YU55
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2010-G88 -- 2010 GU6, 2008 GJ110, 152671, 4179
291Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2010-G88 & 2010-G91 -- 2010 GZ5, 2010 GT7, 2010 GQ33, 2010 FF10, 2010 DN1, 2010 DM56, 2010 CD19, 2010 CC55, 2008 EV5, 2008 CN1
I19Tanti Obs. in Argentina, 1 in MPEC 2010-G88 -- 153814
926Tenagra II Obs. in Arizona, 6 in MPECs 2010-G87, 2010-G88, 2010-G89, 2010-G90, 2010-G93 & 2010-G94 -- 2010 GZ33, 2010 GY23, 2010 GP33, 2010 GO33, C/2010 G2, 2007 TO74
H53Thompsonville Obs. in Illinois, 5 in MPEC 2010-G88 -- 88254, 218863, 3554, 1627, 433
H83Timberlake Obs. in Virginia, 2 in MPEC 2010-G88 -- 2010 GU21, 2010 GS7
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-G87 -- C/2010 G2
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2010-G88 -- 2005 YU55
D25Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2010-G88 -- 1036
G72University Hills Obs. in southern California, 1 in MPEC 2010-G88 -- 2010 CM44
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2010-G88 -- 68216, 232382, 3671
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 12 April '10

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS at 2358 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 GR33JPL Sentry14002029-2106107.0e-09-7.13-7.750JPL: "Analysis based on 12 observations spanning .95877 days (2010-Apr-11.47552 to 2010-Apr-12.43429)." Diameter approximately 0.095 km. from mean, weighted H=22.8.
2010 GM23JPL Sentry14002087-2108191.3e-05-4.94-5.440JPL: "Analysis based on 54 observations spanning 3.0120 days (2010-Apr-08.31133 to 2010-Apr-11.32329)." Diameter approximately 0.040 km. from mean, weighted H=24.7.
NEODyS1400208724.57e-07-6.31-6.440NEODyS: "Based on 54 optical observations (of which 1 are rejected as outliers) from 2010/04/08.312 to 2010/04/11.324."
2010 GK23NEODyS1400R E M O V E D-
JPL Sentry1400R E M O V E DJPL: Risk listing removed at 1131 UTC.
2010 GT7JPL Sentry1400R E M O V E DJPL: Risk listing removed at 1130 UTC.
2010 GH7JPL Sentry14002099-2110211.0e-04-5.62-6.080JPL: "Analysis based on 42 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 FX80JPL Sentry1400R E M O V E DJPL: Risk listing removed at 1049 UTC.
2005 YU55NEODyS20112059-2109608.76e-06-3.67-4.540NEODyS: "Based on 387 optical observations (of which 2 are rejected as outliers) from 2005/12/24.299 to 2010/04/12.003."
2001 WN5NEODyS14002099-213374.52e-08-4.52-4.660NEODyS: "Based on 148 optical observations (of which 4 are rejected as outliers) from 1996/02/10.397 to 2010/04/11.338."

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 12 April '10

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

2302Grabbed MPEC 2010-G96 - 2010 GA34 - see above
Grabbed MPEC 2010-G97 - 2010 ER65, 2010 ES65, 2010 FB49, 2010 FC49, 2010 FD49, 2010 FE49 - see above
2135Grabbed MPEC 2010-G95 - 2009 SO103 - see above
2011Noted that NEODyS has updated its 2005 YU55 risk assessment - see above
Grabbed MPEC 2010-G94 - 2010 GZ33 - see above
1704Grabbed MPEC 2010-G93 - 2007 TO74 - see above
1400Noted that NEODyS has updated its 2001 WN5 risk assessment - see above
Noted that JPL Sentry has removed 2010 FX80 as an impact risk - see above
Noted that JPL Sentry has updated its 2010 GH7 risk assessment - see above
Noted that JPL Sentry has removed 2010 GK23 as an impact risk - see above
Noted that NEODyS has removed 2010 GK23 as an impact risk - 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 posted 2010 GR33 as an impact risk - see above
Noted that JPL Sentry has removed 2010 GT7 as an impact risk - see above
Grabbed MPEC 2010-G88 - Daily Orbit Update - see above
Grabbed MPEC 2010-G89 - 2010 GO33 - see above
Grabbed MPEC 2010-G90 - 2010 GP33 - see above
Grabbed MPEC 2010-G91 - 2010 GQ33 - see above
Grabbed MPEC 2010-G92 - 2010 GR33 - see above
0441Grabbed MPEC 2010-G87 - Comet C/2010 G2 (Hill) - see above