Contents  on 6 May '11

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 6 May '11

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 2306 UTC when the database was dated 6 May

NEOCP Activity  on 6 May '11

The Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) was not checked on this day.

New MPECs  on 6 May '11

Minor Planet Electronic Circulars

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


MPEC 2011-J28 - "16:44 UT" - Observations and Orbits of Comets


<< DOU on 6 May '11 >>  MPEC 2011-J27 - "07:08 UT" - Daily Orbit Update


MPEC 2011-J26 - "00:41 UT" - Comet P/2004 HC18 (LINEAR) = 2011 J1

Observers  on 6 May '11

A total of 82 observers appeared in this day's MPECs.

CodeObserver / observatory
834AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2011-J28 -- C/2009 F4
349Ageo Obs. in Japan, 7 in MPEC 2011-J28 -- C/2011 C1, C/2005 L3, 250P, 162P, 71P, 43P, 29P
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2011-J27 -- 2011 BJ2
251Arecibo in Puerto Rico, 1 in radar -- 217807
H21Astronomical Research Obs. Westfield in Illinois, 13 in MPEC 2011-J27 -- 2011 JK, 2011 JE1, 2011 JD1, 2011 HS4, 2011 HO5, 2011 HO4, 2011 HN24, 2011 HL7, 2011 HD63, 2011 GD68, 2011 GD62, 2011 GB3, 2010 XZ
C34Baja Obs. in Hungary, 1 in MPEC 2011-J28 -- C/2010 X1
621Bergisch Gladbach Obs. in Germany, 1 in MPEC 2011-J28 -- C/2009 F2
B59Borken Obs. in Germany, 1 in MPEC 2011-J28 -- C/2010 X1
B96Brixiis Obs. in Belgium, 10 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 UG89, C/2008 FK75, 240P, 115P, 71P, 29P
215Buchloe Obs. in Germany, 14 in MPEC 2011-J28 -- C/2011 A3, C/2010 X1, C/2010 L3, C/2010 J2, C/2010 F3, 240P, 223P, 203P, 123P, 118P, 103P, 73P, 43P, 29P
235CAST Obs. in Italy, 3 in MPEC 2011-J28 -- C/2011 F1, C/2010 X1, 103P
J96Cantabria Obs. in Spain, 1 in MPEC 2011-J28 -- C/2010 G2
160Castelmartini Obs. in Italy, 9 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1, P/2010 WK, 240P, 123P, 103P, 71P, 29P
703Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2011-J27 & 2011-J28 -- 2011 HT, C/2009 UG89, C/2009 F2, C/2007 VO53, 263976, 250P, 240P, 162P, 115P, 103P
107Cavezzo Obs. in Italy, 2 in MPEC 2011-J28 -- C/2010 G2, 123P
G58Chabot Obs. in northern California, 4 in MPEC 2011-J27 -- 2011 JE1, 2011 HO4, 2011 GZ54, 2011 GD68
A77Chante-Perdrix Obs. in France, 14 in MPEC 2011-J28 -- C/2011 G1, C/2011 A3, C/2010 X1, C/2010 J2, C/2009 UG89, C/2009 F2, C/2007 VO53, C/2007 Q3, C/2006 S3, 115P, 73P, 31P, 29P, 21P
J18Churchstoke Obs. in Wales, 2 in MPEC 2011-J28 -- 37P, 29P
J01Cielo Profundo Obs. in Spain, 3 in MPEC 2011-J28 -- C/2011 F1, C/2010 X1, 29P
C13Como Obs. in Italy, 1 in MPEC 2011-J27 -- 2001 QP181
850Cordell-Lorenz Obs. in Tennessee, 2 in MPEC 2011-J28 -- C/2011 A3, 123P
106Crni Vrh Obs. in Slovenia, 1 in MPEC 2011-J28 -- C/2010 X1
958Dax Obs. in France, 20 in MPEC 2011-J28 -- C/2011 F1, C/2011 C1, C/2011 A3, P/2011 A2, C/2010 X1, P/2010 WK, C/2009 UG89, C/2009 F2, C/2008 FK75, C/2007 VO53, C/2007 Q3, C/2006 S3, C/2005 L3, 240P, 123P, 115P, 103P, 73P, 43P, 29P
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2011-J27 -- 2011 HP, 2011 HL7
114Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2011-J28 -- 115P
157Frasso Sabino Obs. in Italy, 2 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3
372Geisei Obs. in Japan, 5 in MPEC 2011-J28 -- C/2011 G1, C/2011 F1, C/2011 C1, C/2010 X1, 29P
B83Gieres Obs. in France, 2 in MPEC 2011-J28 -- C/2011 A3, C/2010 X1
I82Guimar Obs., 3 in MPEC 2011-J28 -- C/2010 X1, 240P, 29P
511Haute Provence Obs. in Germany, 4 in MPEC 2011-J28 -- C/2011 A3, C/2010 X1, C/2010 G2, C/2005 L3
D88Hiratsuka Obs. in Japan, 2 in MPEC 2011-J28 -- C/2011 A3, C/2010 X1
C46Horizon Obs., 2 in MPEC 2011-J28 -- C/2005 L3, 123P
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-J28 -- C/2010 X1, 162P, 118P
987Isle of Man Obs. on the Isle of Man, 4 in MPEC 2011-J28 -- C/2010 X1, C/2010 G2, 123P, 29P
585Kiev Comet Station in the Ukraine, 9 in MPEC 2011-J28 -- C/2011 C1, C/2011 A3, C/2010 X1, C/2006 S3, 240P, 123P, 73P, 71P, 29P
D95Kurihara Obs. in Japan, 10 in MPEC 2011-J28 -- C/2011 G1, C/2011 C1, C/2010 X1, C/2010 G2, C/2010 B1, C/2009 UG89, C/2008 FK75, 123P, 103P, 29P
E28Kuriwa Obs., 1 in MPEC 2011-J28 -- 103P
704LINEAR in New Mexico, 16 in MPECs 2011-J27 & 2011-J28 -- 2011 HL7, C/2011 F1, C/2011 A3, P/2011 A2, C/2010 X1, C/2010 R1, C/2010 G2, C/2009 F2, 2007 PP6, 2004 FU4, 68348, 37336, 162P, 115P, 103P, 73P
J38La Vara Obs. in Spain, 6 in MPEC 2011-J28 -- C/2011 A3, C/2010 X1, C/2010 G2, 240P, 123P, 29P
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2011-J27 -- 2011 HP24
B82Maidbronn Obs. in Germany, 6 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1, 240P, 73P, 71P
C10Maisoncelles Obs. in France, 15 in MPEC 2011-J28 -- C/2011 C1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 UG89, C/2009 F2, C/2007 VO53, 240P, 203P, 123P, 115P, 73P, 71P, 29P, 21P
A01Masia Cal Maciarol Modul 1 in Spain, 1 in MPEC 2011-J28 -- 240P
118Modra Obs. in Slovakia, 1 in MPEC 2011-J28 -- C/2011 F1
213Montcabre Obs. in Spain, 3 in MPEC 2011-J28 -- C/2011 A3, C/2010 X1, 29P
945Monte Deva Obs. in Spain, 4 in MPEC 2011-J28 -- C/2010 X1, C/2010 G2, 123P, 29P
900Moriyama Obs. in Japan, 3 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1
474Mt. John Obs. in New Zealand, 7 in MPEC 2011-J27 -- 2011 JY1, 2011 JD1, 2011 HC24, 2011 GF, 2011 GD62, 2011 GC60, 2011 GA62
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2011-J27 & 2011-J28 -- 2011 JY1, 2011 HR, 2011 HG, 2011 GQ59, P/2011 A2, C/2010 F3, 89959, 230P, 115P, 73P
E07Murrumbateman Obs. in New South Wales, 12 in MPEC 2011-J28 -- C/2011 G1, C/2011 A3, C/2010 X1, C/2010 FB87, C/2010 B1, C/2006 W3, 115P, 103P, 74P, 43P, 37P, 29P
A13Naef Obs. in Switzerland, 2 in MPEC 2011-J28 -- 118P, 115P
J47Nazaret Obs. in Spain, 8 in MPEC 2011-J28 -- C/2011 C1, C/2011 A3, C/2010 X1, C/2010 R1, C/2007 Q3, 115P, 103P, 29P
A24New Millennium Obs. in Italy, 5 in MPEC 2011-J27 -- 2004 FU4, 2001 QP181, 2000 JE5, 141531, 8176
C47Nonndorf Obs., 4 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2
583Odessa-Mayaki Obs. in the Ukraine, 2 in MPEC 2011-J28 -- C/2010 X1, 29P
C23Olmen Obs. in Belgium, 8 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 UG89, C/2007 VO53, 240P, 29P
F51Pan-STARRS 1 (PS1) in Hawaii, 13 in MPECs 2011-J27 & 2011-J28 -- 2011 GQ59, 2011 BE38, 2011 AF37, P/2011 A2, C/2010 X1, C/2010 F3, C/2005 L3, 162433, 5646, 230P, 203P, 162P, 118P
A53Peschiera del Garda Obs. in Italy, 4 in MPEC 2011-J27 -- 2004 FG1, 274138, 260141, 162463
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 X1, 29P
J52Pinsoro Obs. in Spain, 3 in MPEC 2011-J28 -- C/2009 K5, 103P, 29P
5611Janos Kelemen via Piszkesteto Sta. in Hungary, 1 in MPEC 2011-J28 -- C/2011 F1
D29Purple Mtn. Obs. Xuyi Station in China, 2 in MPEC 2011-J28 -- P/2011 A2, C/2009 F2
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 13 in MPEC 2011-J28 -- C/2011 C1, C/2010 R1, P/2010 D2, C/2009 S3, C/2009 P1, C/2007 Q3, C/2005 L3, 241P, 240P, 231P, 213P, 123P, 73P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 5 in MPEC 2011-J28 -- C/2011 G1, C/2010 X1, C/2006 W3, 115P, 37P
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 5 in MPEC 2011-J28 -- C/2011 G1, C/2011 C3, C/2010 FB87, C/2009 F4, C/2006 W3
939Rodeno Obs. in Spain, 2 in MPEC 2011-J28 -- 240P, 29P
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2011-J28 -- 31P, 29P
233San Vito Obs. in Italy, 5 in MPECs 2011-J27 & 2011-J28 -- C/2011 F1, C/2010 X1, C/2010 G2, 3554, 103P
H36Sandlot Obs. in Kansas, 2 in MPEC 2011-J27 -- 2011 JE1, 2011 JD1
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2011-J27 & 2011-J28 -- C/2007 S2, 1916
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-J28 -- C/2010 X1
691Spacewatch 0.9m telescope in Arizona, 5 in MPEC 2011-J27 -- 2011 HS4, 2011 HO24, 2011 HF, 2007 PP6, 1999 HD1
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2011-J26, 2011-J27 & 2011-J28 -- P/2011 J1, 2011 HO5, 2011 HO24, 2011 HJ7, 2011 HG, 2011 HE24, 2011 HD63, 2011 HC36, P/2011 A2, P/2010 C1, 115P
A71Stixendorf Obs. in Austria, 10 in MPEC 2011-J28 -- C/2011 F1, C/2011 C1, C/2011 A3, C/2010 X1, C/2010 G2, 240P, 123P, 73P, 71P, 29P
H10Tzec Maun Obs. Mayhill in New Mexico, 20 in MPEC 2011-J28 -- C/2011 F1, C/2011 A3, C/2010 R1, C/2010 G2, C/2009 UG89, C/2007 VO53, C/2007 D1, C/2005 L3, 240P, 231P, 162P, 123P, 117P, 115P, 103P, 73P, 71P, 43P, 37P, 29P
D96Tzec Maun Obs. Moorook in South Australia, 9 in MPEC 2011-J28 -- C/2010 X1, C/2010 FB87, C/2010 B1, C/2009 F4, 213P, 103P, 43P, 29P, 9P
B51Vallauris Obs. in France, 2 in MPEC 2011-J28 -- C/2010 X1, C/2010 G2
H47Vicksburg Obs. in Mississippi, 3 in MPEC 2011-J28 -- C/2009 UG89, C/2007 VO53, 43P
C51WISE in Earth polar orbit, 1 in MPEC 2011-J27 -- 2007 WV4
940Waterlooville Obs. in England, 1 in MPEC 2011-J28 -- C/2010 X1
198Wildberg Obs. in Germany, 1 in MPEC 2011-J28 -- 21P
367Yatsuka Obs. in Japan, 9 in MPEC 2011-J28 -- C/2011 G1, C/2011 C1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 Y1, C/2006 S3, 213P, 29P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 May '11

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
2011 JKJPL Sentry1537R E M O V E DJPL: Risk listing removed at 1055 UTC.
2011 HD63NEODyS1537R E M O V E D-
JPL Sentry1537R E M O V E DJPL: Risk listing removed at 1222 UTC.
2011 HP24NEODyS1537R E M O V E D-
JPL Sentry1537R E M O V E DJPL: Risk listing removed at 1129 UTC.
2011 HN24NEODyS15372040-204013.2e-08-8.64-8.640NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2011-04-27.460 to 2011-05-05.331."
2011 HJ7JPL Sentry15372094-209824.4e-09-7.10-7.120JPL: "Analysis based on 21 observations spanning 8.9617 days (2011-Apr-26.21907 to 2011-May-05.18081)." Diameter approximately 0.120 km. from mean, weighted H=22.2.
2011 HO5JPL Sentry15372051-2108772.7e-05-4.55-4.890JPL: "Analysis based on 43 observations spanning 8.0569 days (2011-Apr-27.39956 to 2011-May-05.45645)." Diameter approximately 0.047 km. from mean, weighted H=24.3.
NEODyS15372062-2090572.09e-05-4.64-4.90NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2011-04-27.400 to 2011-05-05.457."

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 6 May '11

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

2306Noted Radar Astrometry database update - see above
1731Grabbed MPEC 2011-J28 - Observations and Orbits of Comets - see above
1537Noted that JPL Sentry has removed 2011 HD63 as an impact risk - see above
Noted that NEODyS has removed 2011 HD63 as an impact risk - see above
Noted that JPL Sentry has updated its 2011 HJ7 risk assessment - see above
Noted that NEODyS has updated its 2011 HN24 risk assessment - see above
Noted that JPL Sentry has updated its 2011 HO5 risk assessment - see above
Noted that NEODyS has updated its 2011 HO5 risk assessment - see above
Noted that JPL Sentry has removed 2011 HP24 as an impact risk - see above
Noted that NEODyS has removed 2011 HP24 as an impact risk - see above
Noted that JPL Sentry has removed 2011 JK as an impact risk - see above
Grabbed MPEC 2011-J27 - Daily Orbit Update - see above
0108Grabbed MPEC 2011-J26 - Comet P/2004 HC18 (LINEAR) = 2011 J1 - see above