Contents  on 8 April '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.

NEOCP Activity  on 8 April '11

The MPC's NEO Confirmation Page has 10 listings: 1 new, 9 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and nine updated listings. Of these, four were "one nighters."

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 8 April '11

Minor Planet Electronic Circulars

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


MPEC 2011-G59 - "19:27 UT" - 2010 LM68


MPEC 2011-G58 - "16:46 UT" - Observations and Orbits of Comets


<< DOU on 8 Apr. '11 >>  MPEC 2011-G57 - "07:11 UT" - Daily Orbit Update

Observers  on 8 April '11

A total of 98 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 10 in MPEC 2011-G58 -- C/2011 F1, C/2011 C1, C/2011 A3, P/2011 A2, C/2010 X1, C/2010 FB87, C/2010 B1, 240P, 123P, 31P
B54Ager Obs. in Spain, 8 in MPEC 2011-G58 -- C/2011 F1, C/2011 A3, C/2010 G2, C/2009 UG89, C/2007 VO53, 247P, 240P, 73P
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2011-G58 -- C/2010 G3
H21Astronomical Research Obs. Westfield in Illinois, 12 in MPECs 2011-G57 & 2011-G58 -- 2011 GZ2, 2011 GR36, 2011 GP44, 2011 GK44, 2011 GG3, 2011 GE3, 2011 GC3, 2011 GB55, 2011 FY2, 2011 FG, C/2011 A3, 2010 TH19
467Auckland Obs. in New Zealand, 4 in MPEC 2011-G58 -- C/2010 X1, C/2009 F4, 43P, 29P
A81Balzaretto Obs. in Italy, 1 in MPEC 2011-G58 -- 29P
565Bassano Bresciano Obs. in Italy, 3 in MPEC 2011-G58 -- C/2010 X1, 71P, 29P
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2011-G57 -- 2000 JE5
D97Berri Obs., 1 in MPEC 2011-G58 -- 43P
I32Beta Orionis Obs. in Argentina, 1 in MPEC 2011-G58 -- C/2010 FB87
I99Blanquita Obs. in Spain, 2 in MPEC 2011-G58 -- 103P, 29P
B59Borken Obs. in Germany, 1 in MPEC 2011-G58 -- C/2010 X1
B96Brixiis Obs. in Belgium, 3 in MPEC 2011-G58 -- C/2011 F1, C/2010 G2, 29P
215Buchloe Obs. in Germany, 8 in MPEC 2011-G58 -- P/2011 A1, C/2010 G3, P/2010 D2, 247P, 240P, 73P, 37P, 29P
235CAST Obs. in Italy, 3 in MPEC 2011-G58 -- C/2010 X1, 103P, 29P
B20Carmelita Obs. in Spain, 2 in MPEC 2011-G58 -- C/2010 X1, 29P
160Castelmartini Obs. in Italy, 12 in MPEC 2011-G58 -- C/2011 F1, C/2011 A3, C/2010 X1, P/2010 WK, C/2010 G2, C/2009 UG89, 247P, 240P, 123P, 103P, 71P, 31P
703Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1, C/2010 G3, 71P, 43P
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 7 in MPEC 2011-G57 -- 2011 GE3, 2011 GE, 2011 GB3, 2011 FB29, 2010 VN65, 2008 CM116, 2002 JQ100
A77Chante-Perdrix Obs. in France, 12 in MPECs 2011-G57 & 2011-G58 -- C/2011 C1, P/2011 A2, C/2010 X1, C/2010 G2, C/2009 F2, C/2006 S3, C/2005 L3, 31210, 117P, 115P, 73P, 29P
J18Churchstoke Obs. in Wales, 3 in MPEC 2011-G57 -- 2011 GZ2, 2011 GR36, 2011 GL44
J01Cielo Profundo Obs. in Spain, 8 in MPEC 2011-G58 -- C/2011 F1, P/2011 C2, P/2011 A2, P/2011 A1, C/2010 X1, C/2010 G2, C/2007 Q3, 29P
850Cordell-Lorenz Obs. in Tennessee, 3 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1, 73P
B50Corner Obs. in Germany, 1 in MPEC 2011-G58 -- 123P
106Crni Vrh Obs. in Slovenia, 2 in MPEC 2011-G58 -- C/2010 G2, C/2009 UG89
958Dax Obs. in France, 17 in MPEC 2011-G58 -- C/2011 F1, C/2011 A3, C/2010 X1, P/2010 WK, C/2010 G2, C/2009 UG89, C/2007 Q3, C/2005 L3, 247P, 162P, 123P, 115P, 103P, 73P, 71P, 43P, 29P
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPEC 2011-G57 -- 2011 FZ22, 2011 FT53, 2011 FS29, 2011 EM51
113Drebach Obs. in Germany, 1 in MPEC 2011-G58 -- C/2010 G3
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2011-G58 -- C/2010 X1
157Frasso Sabino Obs. in Italy, 1 in MPEC 2011-G58 -- C/2010 X1
372Geisei Obs. in Japan, 3 in MPEC 2011-G58 -- C/2011 F1, C/2011 C1, C/2010 X1
B83Gieres Obs. in France, 1 in MPEC 2011-G58 -- C/2010 X1
J95Great Shefford Obs. in England, 1 in MPEC 2011-G57 -- 2011 GZ2
E16Grove Creek Obs. in New South Wales, 1 in MPEC 2011-G58 -- C/2010 FB87
442Gualba Obs. in Spain, 1 in MPEC 2011-G58 -- 29P
240Herrenberg Obs. in Germany, 2 in MPEC 2011-G57 -- 267136, 136617
C46Horizon Obs., 5 in MPEC 2011-G58 -- C/2010 X1, C/2005 L3, 123P, 103P, 29P
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-G58 -- C/2011 C1, C/2006 S3, 152P
A21Irmtraut Obs. in Germany, 2 in MPEC 2011-G58 -- C/2010 X1, C/2010 B1
987Isle of Man Obs. on the Isle of Man, 2 in MPEC 2011-G58 -- C/2010 X1, 29P
J28Jaen Obs. in Spain, 1 in MPEC 2011-G58 -- C/2010 X1
585Kiev Comet Station in the Ukraine, 5 in MPEC 2011-G58 -- C/2011 A3, P/2011 A1, C/2010 X1, 247P, 73P
400Kitami Obs. in Japan, 3 in MPEC 2011-G58 -- C/2011 F1, C/2010 X1, C/2010 G2
D95Kurihara Obs. in Japan, 6 in MPEC 2011-G58 -- C/2011 C1, C/2010 X1, C/2010 S1, C/2010 B1, C/2006 S3, 29P
704LINEAR in New Mexico, 7 in MPEC 2011-G58 -- P/2011 A2, C/2010 X1, C/2009 UG89, C/2009 F2, C/2007 VO53, C/2005 L3, 103P
J87La Canada Obs. in Spain, 1 in MPEC 2011-G58 -- 73P
J38La Vara Obs. in Spain, 8 in MPEC 2011-G58 -- C/2011 F1, C/2010 X1, C/2010 G2, 240P, 123P, 103P, 71P, 29P
H11LightBuckets Obs. Rodeo in New Mexico, 2 in MPEC 2011-G58 -- C/2011 C1, C/2010 X1
J59Linceo Obs. in Spain, 1 in MPEC 2011-G58 -- 29P
B82Maidbronn Obs. in Germany, 7 in MPEC 2011-G58 -- C/2011 F1, C/2010 X1, P/2010 WK, C/2010 S1, 240P, 123P, 103P
C10Maisoncelles Obs. in France, 16 in MPEC 2011-G58 -- C/2011 C1, C/2011 A3, P/2011 A2, C/2010 X1, C/2010 L3, C/2010 J2, C/2009 UG89, C/2009 F2, C/2007 VO53, C/2006 S3, 240P, 117P, 115P, 73P, 71P, 29P
118Modra Obs. in Slovakia, 2 in MPEC 2011-G58 -- C/2011 F1, C/2010 L3
213Montcabre Obs. in Spain, 8 in MPEC 2011-G58 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, 240P, 103P, 73P, 29P
945Monte Deva Obs. in Spain, 5 in MPEC 2011-G58 -- C/2010 X1, C/2010 G2, 123P, 103P, 29P
900Moriyama Obs. in Japan, 16 in MPEC 2011-G58 -- C/2011 F1, C/2011 A3, P/2011 A2, C/2010 X1, C/2010 S1, C/2010 G2, C/2005 L3, 247P, 240P, 231P, 123P, 103P, 73P, 71P, 43P, 29P
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPEC 2011-G58 -- C/2010 X1, P/2010 C1, 228P, 118P
J93Mt. Tuffley Obs. in England, 3 in MPECs 2011-G57 & 2011-G58 -- C/2010 X1, 85953, 3554
E07Murrumbateman Obs. in New South Wales, 9 in MPEC 2011-G58 -- C/2011 C3, C/2010 X1, C/2010 FB87, C/2010 B1, C/2006 W3, C/2006 S3, 103P, 43P, 37P
A13Naef Obs. in Switzerland, 1 in MPEC 2011-G57 -- 159635
J47Nazaret Obs. in Spain, 5 in MPEC 2011-G58 -- C/2010 X1, C/2010 B1, 103P, 71P, 29P
A24New Millennium Obs. in Italy, 27 in MPECs 2011-G57 & 2011-G58 -- 2011 CH71, 2010 WQ7, 2008 SO, 2004 FU4, 2004 FG1, 2002 TD60, 2001 QP181, 1999 XR35, 89958, 86667, 40267, 36284, 34613, 256412, 252793, 21374, 198856, 141525, 136617, 11885, 5869, 4954, 4660, 3554, 3122, 1864, 29P
J69North Obs. in England, 1 in MPEC 2011-G57 -- 85953
583Odessa-Mayaki Obs. in the Ukraine, 2 in MPEC 2011-G58 -- C/2010 G2, 29P
C23Olmen Obs. in Belgium, 3 in MPEC 2011-G58 -- C/2010 S1, C/2010 G2, 29P
557Ondrejov Obs. in the Czech Republic, 1 in MPEC 2011-G57 -- 85953
F51Pan-STARRS 1 (PS1) in Hawaii, 12 in MPECs 2011-G57 & 2011-G58 -- 2011 FG, C/2010 X1, 2004 FG1, 2001 CA32, 1999 TK12, 99248, 234341, 164222, 163412, 152679, 152P, 37P
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-G58 -- C/2010 X1
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 10 in MPECs 2011-G57 & 2011-G58 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2009 U5, C/2009 F2, 2008 FU6, 2001 QP181, 89958, 240P, 29P
J52Pinsoro Obs. in Spain, 9 in MPEC 2011-G58 -- C/2010 B1, C/2008 FK75, C/2007 Q3, C/2006 S3, 247P, 240P, 103P, 29P, 10P
H06%Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-G58 -- C/2011 C1
H06|H. Sato in Japan via RAS Obs. Mayhill in New Mexico, 6 in MPECs 2011-G57 & 2011-G58 -- 2011 GW9, C/2011 C1, C/2010 X1, C/2010 G2, C/2008 FK75, 71P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 5 in MPEC 2011-G58 -- C/2011 G1, P/2011 A2, C/2010 B1, 43P, 29P
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 3 in MPEC 2011-G58 -- C/2011 C3, C/2009 F4, 213P
939Rodeno Obs. in Spain, 5 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1, 123P, 103P, 29P
C09Rouet Obs. in France, 4 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1, C/2009 UG89, 29P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-G58 -- C/2011 F1
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1
233San Vito Obs. in Italy, 3 in MPECs 2011-G57 & 2011-G58 -- 260141, 240P, 123P
B74Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2011-G58 -- 29P
204Schiaparelli Obs. in Italy, 3 in MPEC 2011-G58 -- C/2011 C3, 43P, 37P
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2011-G58 & 2011-G59 -- C/2011 G1, 2010 LM68
510Siegen Obs. in Germany, 2 in MPEC 2011-G58 -- C/2011 F1, 73P
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-G58 -- 103P
691Spacewatch 0.9m telescope in Arizona, 8 in MPECs 2011-G57 & 2011-G58 -- P/2011 A2, C/2010 X1, C/2010 F3, 65803, 250706, 6037, 5626, 31P
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2011-G57 -- 2010 JL33
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2011-G57 & 2011-G58 -- 2011 GF, 2011 GB3, P/2011 A2
A71Stixendorf Obs. in Austria, 7 in MPEC 2011-G58 -- C/2011 C1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 Y1, 71P, 29P
I40TRAPPIST in Chile, 4 in MPEC 2011-G58 -- C/2010 X1, C/2009 P1, 103P, 10P
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1
H10Tzec Maun Obs. Mayhill in New Mexico, 17 in MPEC 2011-G58 -- C/2011 F1, C/2011 A3, C/2010 X1, P/2010 WK, C/2010 G2, C/2010 B1, C/2009 UG89, C/2007 VO53, C/2005 L3, 240P, 231P, 203P, 123P, 103P, 73P, 71P, 29P
D96Tzec Maun Obs. Moorook in South Australia, 9 in MPEC 2011-G58 -- C/2011 C1, C/2010 X1, C/2010 FB87, C/2009 P1, C/2009 F4, C/2006 W3, C/2006 S3, 43P, 9P
I86UCM Obs., 1 in MPEC 2011-G58 -- 29P
H47Vicksburg Obs. in Mississippi, 4 in MPEC 2011-G58 -- C/2009 UG89, 73P, 43P, 29P
B42Vitebsk Obs. in Belarus, 8 in MPEC 2011-G58 -- C/2011 A3, C/2010 X1, C/2009 UG89, C/2005 L3, 162P, 103P, 73P, 29P
940Waterlooville Obs. in England, 1 in MPEC 2011-G58 -- 123P
C28Wellinghofen Obs. in Germany, 1 in MPEC 2011-G58 -- 29P
C42Xingming Obs. in China, 1 in MPEC 2011-G58 -- 29P
D79YSVP Obs., 1 in MPEC 2011-G58 -- C/2009 F4
367Yatsuka Obs. in Japan, 12 in MPEC 2011-G58 -- C/2011 F1, C/2011 C1, C/2010 X1, C/2010 S1, C/2010 G2, C/2010 FB87, C/2010 B1, C/2006 S3, 123P, 71P, 31P, 29P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 8 April '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 GA55NEODyS16402016-2089452.39e-08-4.08-4.390NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2011-04-05.736 to 2011-04-06.803."

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 8 April '11

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

2001Grabbed MPEC 2011-G59 - 2010 LM68 - see above
1747Grabbed MPEC 2011-G58 - Observations and Orbits of Comets - see above
1640Noted that NEODyS has posted 2011 GA55 as an impact risk - see above
Grabbed MPEC 2011-G57 - Daily Orbit Update - see above