Contents  on 2 June '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 2 June '11

The MPC's NEO Confirmation Page has 44 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had 44 objects listed. Of these, 29 were "one nighters." So far The Tracking News has counted a total of 55 listings on the NEOCP 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 2 June '11

Minor Planet Electronic Circulars

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


MPEC 2011-L11 - "18:04 UT" - Observations and Orbits of Comets


MPEC 2011-L10 - "10:54 UT" - 2011 KW19


MPEC 2011-L09 - "10:08 UT" - 2011 KT19


MPEC 2011-L08 - "10:06 UT" - 2011 KQ19


<< DOU on 2 June '11 >>  MPEC 2011-L07 - "07:08 UT" - Daily Orbit Update

Observers  on 2 June '11

A total of 64 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 10 in MPEC 2011-L11 -- C/2011 F1, C/2011 C1, C/2010 G2, C/2009 Y1, C/2009 P1, C/2007 VO53, C/2006 S3, 213P, 48P, 9P
B54Ager Obs. in Spain, 2 in MPEC 2011-L11 -- C/2009 UG89, C/2007 VO53
A50Andrushivka Obs. in the Ukraine, 2 in MPEC 2011-L07 -- 2011 KP16, 2008 HE
H21Astronomical Research Obs. Westfield in Illinois, 9 in MPEC 2011-L07 -- 2011 KN17, 2011 KL12, 2011 KK15, 2011 KJ15, 2011 KC15, 2011 KB, 2011 JW10, 2011 HS, 2011 HQ
069Baldone Obs. in Latvia, 1 in MPEC 2011-L11 -- C/2010 G2
I32Beta Orionis Obs. in Argentina, 1 in MPEC 2011-L11 -- C/2010 X1
B75Betelgeuse Station in Italy, 2 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3
B96Brixiis Obs. in Belgium, 6 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, C/2009 UG89, 115P
235CAST Obs. in Italy, 2 in MPEC 2011-L11 -- C/2010 X1, 29P
703Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2011-L07 & 2011-L11 -- 2011 EZ78, C/2007 VO53
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 8 in MPECs 2011-L07, 2011-L08 & 2011-L09 -- 2011 KT19, 2011 KQ19, 2011 KF9, 2011 KD11, 2011 KC15, 2011 GD62, 2011 GA62, 2011 BO59
A77Chante-Perdrix Obs. in France, 7 in MPEC 2011-L11 -- C/2011 G1, C/2011 F1, C/2010 X1, C/2009 UG89, C/2006 S3, 37P, 29P
J01Cielo Profundo Obs. in Spain, 3 in MPEC 2011-L11 -- C/2010 X1, 115P, 29P
958Dax Obs. in France, 13 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2009 Y1, C/2009 UG89, C/2009 F2, C/2007 VO53, C/2006 S3, 240P, 123P, 115P, 73P, 29P
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2011-L11 -- P/2011 JB15
E85Farm Cove Obs. in New Zealand, 3 in MPEC 2011-L11 -- C/2011 G1, 43P, 29P
372Geisei Obs. in Japan, 2 in MPEC 2011-L11 -- 29P, 27P
203GiaGa Obs. in Italy, 1 in MPEC 2011-L11 -- C/2011 A3
B83Gieres Obs. in France, 1 in MPEC 2011-L11 -- C/2010 G2
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-L11 -- C/2011 C1, 203P, 27P
585Kiev Comet Station in the Ukraine, 2 in MPEC 2011-L11 -- C/2011 A3, C/2006 S3
D95Kurihara Obs. in Japan, 6 in MPEC 2011-L11 -- C/2011 G1, C/2011 F1, C/2010 X1, 240P, 123P, 29P
704LINEAR in New Mexico, 7 in MPECs 2011-L07 & 2011-L11 -- 2011 KP17, 2011 KN17, 2009 XC2, C/2009 UG89, 231P, 74P, 71P
J31La Axarquia Obs. in Spain, 1 in MPEC 2011-L11 -- 115P
844Los Molinos Obs. in Uruguay, 1 in MPEC 2011-L11 -- C/2010 X1
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2011-L09 -- 2011 KT19
C10Maisoncelles Obs. in France, 6 in MPEC 2011-L11 -- C/2011 A3, C/2009 P1, C/2009 F2, C/2006 S3, 115P, 21P
A01Masia Cal Maciarol Modul 1 in Spain, 1 in MPEC 2011-L11 -- C/2011 A3
213Montcabre Obs. in Spain, 7 in MPEC 2011-L11 -- C/2011 G1, C/2011 F1, C/2009 UG89, C/2007 VO53, C/2006 S3, 115P, 29P
945Monte Deva Obs. in Spain, 2 in MPEC 2011-L11 -- C/2010 G2, 29P
474Mt. John Obs. in New Zealand, 2 in MPECs 2011-L08 & 2011-L09 -- 2011 KT19, 2011 KQ19
G96Mt. Lemmon Survey (MLS) in Arizona, 4 in MPECs 2011-L09 & 2011-L11 -- 2011 KT19, P/2011 C2, C/2010 F3, 227P
A24New Millennium Obs. in Italy, 31 in MPEC 2011-L07 -- 2011 KN9, 2011 JA8, 2011 HT, 2011 HQ, 2011 HP, 2011 HO, 2011 GQ65, 2011 CH71, 2011 AO52, 2010 TU5, 2008 GV20, 2008 AS28, 2007 LQ19, 2004 JO2, 68348, 37336, 275714, 275545, 267494, 263976, 163250, 162474, 162463, 137170, 7482, 3988, 3288, 3103, 1917, 1866, 1036
C23Olmen Obs. in Belgium, 6 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3, C/2010 G2, C/2009 UG89, C/2006 S3, 115P
F51Pan-STARRS 1 (PS1) in Hawaii, 5 in MPECs 2011-L08, 2011-L10 & 2011-L11 -- 2011 KW19, 2011 KQ19, P/2011 C2, 203P, 74P
B49Paus Obs. in Spain, 3 in MPEC 2011-L11 -- C/2010 J2, C/2009 UG89, C/2007 Q3
H23Pear Tree Obs. in Florida, 1 in MPEC 2011-L11 -- 115P
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 12 in MPECs 2011-L07 & 2011-L11 -- 2011 HQ, 2011 HO, C/2011 F1, C/2011 A3, C/2010 X1, 2008 HE, 2008 AS28, C/2006 S3, 37336, 267494, 1866, 29P
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-L11 -- 115P
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 18 in MPEC 2011-L11 -- C/2011 J3, C/2011 J2, C/2011 G1, P/2011 C2, C/2011 C1, C/2011 A3, C/2010 X1, C/2010 G3, C/2009 Y1, C/2009 P1, 240P, 227P, 213P, 162P, 123P, 103P, 73P, 29P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPECs 2011-L07 & 2011-L11 -- 2011 KP17, C/2011 K1, C/2011 G1
E03`Kevin Hills in England via RAS Obs. Victoria in Victoria, 3 in MPEC 2011-L11 -- C/2010 FB87, C/2009 F4, C/2006 W3
071Rhozen Obs. in Bulgaria, 2 in MPEC 2011-L11 -- C/2010 X1, C/2006 S3
939Rodeno Obs. in Spain, 8 in MPEC 2011-L11 -- C/2011 A3, C/2010 X1, C/2009 UG89, C/2008 FK75, C/2006 S3, 240P, 115P, 29P
461SZTE Asteroid Program in Hungary, 1 in MPEC 2011-L11 -- C/2011 A3
104San Marcello Pistoiese Obs. in Italy, 2 in MPEC 2011-L11 -- C/2010 R1, 213P
233San Vito Obs. in Italy, 1 in MPEC 2011-L11 -- C/2011 A3
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-L10 -- 2011 KW19
204Schiaparelli Obs. in Italy, 2 in MPEC 2011-L11 -- C/2009 F2, 115P
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2011-L07 -- 2011 KF4, 2006 JF42, 2002 AA, 1997 XV11, 39572, 172722
510Siegen Obs. in Germany, 4 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3, C/2010 G2, C/2009 P1
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-L11 -- C/2010 X1
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2011-L11 -- 115P
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2011-L10 -- 2011 KW19
I93St. Pardon de Conques Obs. in France, 1 in MPEC 2011-L11 -- 21P
A71Stixendorf Obs. in Austria, 6 in MPEC 2011-L11 -- C/2011 A3, C/2010 X1, C/2010 G2, 240P, 123P, 115P
I66Taurus Australis Obs. in Brazil, 1 in MPEC 2011-L11 -- C/2010 X1
926Tenagra II Obs. in Arizona, 1 in MPEC 2011-L11 -- C/2011 J3
B18Terskol Obs. in Russia, 1 in MPEC 2011-L11 -- P/2011 JB15
H10Tzec Maun Obs. Mayhill in New Mexico, 15 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3, C/2010 X1, C/2010 G2, C/2005 L3, 240P, 123P, 115P, 103P, 73P, 71P, 43P, 37P, 29P, 21P
D96Tzec Maun Obs. Moorook in South Australia, 5 in MPEC 2011-L11 -- C/2009 F4, C/2006 W3, 213P, 130P, 78P
B51Vallauris Obs. in France, 1 in MPEC 2011-L11 -- 29P
H47Vicksburg Obs. in Mississippi, 10 in MPEC 2011-L11 -- C/2011 K1, C/2011 A3, C/2010 X1, C/2009 UG89, C/2009 P1, C/2006 S3, 115P, 74P, 37P, 29P
C42Xingming Obs. in China, 2 in MPEC 2011-L11 -- C/2011 F1, C/2011 A3
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 2 June '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 KN17JPL Sentry1446207118.8e-07-4.76-4.760JPL: "Analysis based on 45 observations spanning 1.9956 days (2011-May-30.27802 to 2011-Jun-01.273581)." Diameter approximately 0.110 km. from mean, weighted H=22.5.
NEODyS14462071-207119.0e-07-4.76-4.760NEODyS: "Based on 45 optical observations (of which 0 are rejected as outliers) from 2011-05-30.279 to 2011-06-01.274."

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 2 June '11

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

1901Grabbed MPEC 2011-L11 - Observations and Orbits of Comets - see above
1446Noted that JPL Sentry has updated its 2011 KN17 risk assessment - see above
Noted that NEODyS has updated its 2011 KN17 risk assessment - see above
Grabbed MPEC 2011-L07 - Daily Orbit Update - see above
Grabbed MPEC 2011-L08 - 2011 KQ19 - see above
Grabbed MPEC 2011-L09 - 2011 KT19 - see above
Grabbed MPEC 2011-L10 - 2011 KW19 - see above