Contents  on 17 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 17 April '10

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

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six new and three updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of sixteen 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 17 April '10

Minor Planet Electronic Circulars

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


MPEC 2010-H12 - "19:25 UT" - Comet P/2010 H2


MPEC 2010-H11 - "16:50 UT" - 2006 XK2


MPEC 2010-H10 - "16:40 UT" - 2010 HA


MPEC 2010-H09 - "16:36 UT" - 2010 GR75


MPEC 2010-H08 - "16:13 UT" - 2010 GQ75


MPEC 2010-H07 - "14:53 UT" - Comet C/2010 H1 (Garradd)


<< DOU on 17 Apr. '10 >>  MPEC 2010-H06 - "06:10 UT" - Daily Orbit Update

Observers  on 17 April '10

A total of 57 observing facilities appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 1 in MPEC 2010-H12 -- P/2010 H2
J24Altamira Obs. in Spain, 7 in MPEC 2010-H06 -- 2010 GS7, 2010 DB34, 2005 YU55, 85839, 68216, 141531, 11066
J16An Carraig Obs. in Northern Ireland, 2 in MPEC 2010-H06 -- 218863, 3554
H21Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 11 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2010 GX23, 2010 GU6, 2010 GU21, 2010 GT7, 2010 GH30, 2010 GG7, 2010 GA24, 2010 CL18, 2009 UV18, 2005 YU55
A81Balzaretto Obs. in Italy, 1 in MPEC 2010-H12 -- P/2010 H2
C12Berta Obs. in Spain, 1 in MPEC 2010-H12 -- P/2010 H2
300Bisei Spaceguard Center in Japan, 1 in MPEC 2010-H12 -- P/2010 H2
B96Brixiis Obs. in Belgium, 1 in MPEC 2010-H12 -- P/2010 H2
B53Casal Lumbroso Obs. in Italy, 1 in MPEC 2010-H12 -- P/2010 H2
160Castelmartini Obs. in Italy, 8 in MPEC 2010-H06 -- 2010 DB34, 2010 CL18, 2009 XC2, 2004 FG11, 85839, 68359, 68216, 141531
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2010-H06 -- 2006 CX10, 218863, 207945
470Ceccano Obs. in Italy, 1 in MPEC 2010-H12 -- P/2010 H2
A77Chante-Perdrix Obs. in France, 1 in MPEC 2010-H12 -- P/2010 H2
850Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2010-H12 -- P/2010 H2
B50Corner Obs. in Germany, 1 in MPEC 2010-H12 -- P/2010 H2
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2010-H12 -- P/2010 H2
B60Deep Sky Obs. in Germany, 1 in MPEC 2010-H06 -- 232382
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2010 GU21
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2010-H12 -- P/2010 H2
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2010-H12 -- P/2010 H2
157Frasso Sabino Obs. in Italy, 1 in MPEC 2010-H12 -- P/2010 H2
E94Gisborne Obs. in New Zealand, 1 in MPEC 2010-H12 -- P/2010 H2
J95Great Shefford Obs. in England, 2 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2005 YU55
750Hobbs Obs. in Wisconsin, 1 in MPEC 2010-H06 -- 2005 YU55
046Klet Obs. in the Czech Republic, 1 in MPEC 2010-H12 -- P/2010 H2
704LINEAR in New Mexico, 17 in MPEC 2010-H06 -- 2010 GS7, 2010 GL65, 2010 GA7, 2010 CN44, 2009 KD5, 2008 GG2, 2005 YU55, 2003 UL12, 2001 HC, 68216, 215588, 164201, 152964, 141432, 12923, 1917, 887
H13Lenomiya Obs. in Arizona, 1 in MPEC 2010-H06 -- 2005 YU55
844Los Molinos Obs. in Uruguay, 1 in MPEC 2010-H12 -- P/2010 H2
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2010 GX62, 2010 GV23, 2010 GH7, 2010 GE35
B82Maidbronn Obs. in Germany, 1 in MPEC 2010-H12 -- P/2010 H2
C10Maisoncelles Obs. in France, 1 in MPEC 2010-H12 -- P/2010 H2
A06Mataro Obs. in Spain, 1 in MPEC 2010-H12 -- P/2010 H2
213Montcabre Obs. in Spain, 2 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2005 YU55
900Moriyama Obs. in Japan, 1 in MPEC 2010-H12 -- P/2010 H2
474Mt. John Obs. in New Zealand, 7 in MPECs 2010-H06, 2010-H07, 2010-H10 & 2010-H12 -- 2010 HA, P/2010 H2, C/2010 H1, 2010 GP33, 2010 GD35, 2010 FG81, 2010 CP140
675{J.R. Masiero & J.W. Dailey via Mt. Palomar in southern California, 1 in MPEC 2010-H08 -- 2010 GQ75
658Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2010-H12 -- P/2010 H2
0841Alexander V. Devyatkin via Pulkovo Obs. in Russia, 125 in MPEC 2010-H06 -- 2009 XR2, 2009 XD, 2009 WZ104, 2009 ST19, 2009 SM103, 2009 RN, 2009 ML1, 2009 KC3, 2008 WL60, 2008 SV11, 2008 SQ1, 2008 SE, 2008 QT3, 2008 QS11, 2008 MZ, 2008 EV5, 2008 EA32, 2007 BT2, 2006 WZ2, 2006 SZ217, 2006 KZ37, 2005 TY51, 2005 RQ6, 2005 MC, 2005 BC, 2003 GW, 2002 WP, 2002 SS41, 2002 NW16, 2002 NP1, 2001 UZ16, 2001 SK9, 2000 CO101, 1998 SJ70, 1996 TE9, 90403, 89355, 86666, 85989, 85818, 85774, 68350, 66146, 66008, 53430, 53319, 52762, 39572, 35396, 35107, 22771, 222073, 22099, 218863, 218017, 217807, 217796, 217683, 207945, 20790, 206910, 20460, 203217, 200754, 190491, 190135, 189700, 188452, 185851, 17511, 17274, 16960, 16834, 164400, 164121, 163000, 162900, 161989, 159402, 155110, 154244, 153953, 152931, 144901, 143678, 142348, 141765, 138883, 136617, 12711, 11398, 11066, 105140, 101873, 9202, 8567, 8566, 7358, 6455, 5646, 5626, 5332, 5143, 5131, 5011, 4257, 4179, 4015, 3691, 3554, 3552, 3361, 3360, 3200, 2212, 2201, 1980, 1943, 1917, 1916, 1865, 1864, 1627, 1620, 433
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2010-H12 -- P/2010 H2
D90RAS Obs. Moorook in South Australia, 1 in MPEC 2010-H12 -- P/2010 H2
J41Raheny Obs. in Ireland, 1 in MPEC 2010-H12 -- P/2010 H2
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2010-H12 -- P/2010 H2
H36Sandlot Obs. in Kansas, 2 in MPECs 2010-H09 & 2010-H12 -- P/2010 H2, 2010 GR75
D21Shenton Park Obs. in Western Australia, 3 in MPECs 2010-H06, 2010-H10 & 2010-H12 -- 2010 HA, P/2010 H2, 2010 GE35
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2010-H06, 2010-H07 & 2010-H10 -- 2010 HA, C/2010 H1, 5653
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2010-H09 -- 2010 GR75
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2010-H06 -- 2010 GZ5, 2010 GY6, 2010 GE35, 2010 GE30, 2010 FY80
611Starkenburg Obs. in Germany, 3 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2010 GS7, 2010 FF10
I19Tanti Obs. in Argentina, 2 in MPEC 2010-H06 -- 2007 EP88, 2003 HR32
926Tenagra II Obs. in Arizona, 4 in MPECs 2010-H06, 2010-H07, 2010-H10 & 2010-H11 -- 2010 HA, C/2010 H1, 2010 GR7, 2006 XK2
B18Terskol Obs. in Russia, 1 in MPEC 2010-H12 -- P/2010 H2
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2010-H12 -- P/2010 H2
D96Tzec Maun Obs. Moorook in South Australia, 2 in MPECs 2010-H06 & 2010-H12 -- P/2010 H2, 2005 YU55
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2010-H12 -- P/2010 H2
C51WISE in Earth polar orbit, 4 in MPECs 2010-H06, 2010-H08 & 2010-H09 -- 2010 GR75, 2010 GQ75, 2010 GH65, 2009 VO24
718Wiggins Obs. in Utah, 1 in MPEC 2010-H06 -- 2005 YU55
367Yatsuka Obs. in Japan, 1 in MPEC 2010-H12 -- P/2010 H2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 17 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 GX62JPL Sentry1547210115.2e-09-6.11-6.110JPL: "Analysis based on 20 observations spanning 5.8899 days (2010-Apr-10.57631 to 2010-Apr-16.46621)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
NEODyS1547R E M O V E D-
2010 GV23JPL Sentry15472096-210526.3e-07-7.91-8.090JPL: "Analysis based on 63 observations spanning 6.9854 days (2010-Apr-09.21954 to 2010-Apr-16.20491)." Diameter approximately 0.010 km. from mean, weighted H=27.6.
2010 GH7JPL Sentry15472099-2110249.0e-05-5.68-6.160JPL: "Analysis based on 59 observations spanning 8.9285 days (2010-Apr-07.38604 to 2010-Apr-16.31456)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
2005 YU55NEODyS22082053-2109762.31e-06-4.27-4.980NEODyS: "Based on 578 optical observations (of which 4 are rejected as outliers) from 2005/12/24.299 to 2010/04/17.140."
JPL Sentry15472062-2109131.6e-06-4.45-4.890JPL: "Analysis based on 575 observations spanning 1574.8 days (2005-Dec-24.29832 to 2010-Apr-17.13931)." Diameter approximately 0.140 km. from mean, weighted H=21.9.

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 17 April '10

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

2208Noted that NEODyS has updated its 2005 YU55 risk assessment - see above
2114Grabbed MPEC 2010-H12 - Comet P/2010 H2 - see above
1700Grabbed MPEC 2010-H08 - 2010 GQ75 - see above
Grabbed MPEC 2010-H09 - 2010 GR75 - see above
Grabbed MPEC 2010-H10 - 2010 HA - see above
Grabbed MPEC 2010-H11 - 2006 XK2 - see above
1547Noted that JPL Sentry has updated its 2005 YU55 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GH7 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GV23 risk assessment - see above
Noted that JPL Sentry has updated its 2010 GX62 risk assessment - see above
Noted that NEODyS has removed 2010 GX62 as an impact risk - see above
Grabbed MPEC 2010-H06 - Daily Orbit Update - see above
Grabbed MPEC 2010-H07 - Comet C/2010 H1 (Garradd) - see above