Contents  on 24 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 24 June '11

The MPC's NEO Confirmation Page has 19 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had nineteen objects listed. Of these, six were "one nighters." So far The Tracking News has counted a total of 23 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 24 June '11

Minor Planet Electronic Circulars

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


MPEC 2011-M31 - "22:30 UT" - Observations and Orbits of Comets


<< DOU on 24 June '11 >>  MPEC 2011-M30 - "07:06 UT" - Daily Orbit Update


MPEC 2011-M29 - "05:48 UT" - 2011 ML


MPEC 2011-M28 - "05:46 UT" - 2011 MK


MPEC 2011-M27 - "05:45 UT" - 2011 MJ


MPEC 2011-M26 - "03:46 UT" - 2003 BK47

Observers  on 24 June '11

A total of 49 observers appear in today's MPECs.

CodeObserver / observatory
349Ageo Obs. in Japan, 4 in MPEC 2011-M31 -- C/2010 G2, C/2008 FK75, 213P, 29P
J97Alginet Obs. in Spain, 2 in MPEC 2011-M31 -- C/2011 F1, C/2011 A3
J24Altamira Obs. in the Canary Islands, 13 in MPEC 2011-M31 -- C/2011 G1, C/2010 X1, C/2010 R1, C/2009 Y1, C/2009 P1, C/2008 FK75, C/2006 S3, 213P, 130P, 115P, 78P, 73P, 48P
H17Angel Peaks Obs. in Colorado, 2 in MPECs 2011-M30 & 2011-M31 -- 2011 EZ78, C/2009 P2
7057program code 7 via Apache Point Obs. in New Mexico, 9 in MPEC 2011-M31 -- P/2007 R1, C/2007 M3, C/2006 U6, C/2005 B1, 191P, 167P, 147P, 113P, 9P
I99Blanquita Obs. in Spain, 3 in MPEC 2011-M31 -- C/2009 P1, C/2006 S3, 115P
G51Byrne Obs., 2 in MPECs 2011-M30 & 2011-M31 -- 2011 MD, C/2011 L4
703Catalina Sky Survey (CSS) in Arizona, 4 in MPECs 2011-M27, 2011-M28 & 2011-M30 -- 2011 MK, 2011 MJ, 20086, 162913
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2011-M27 & 2011-M29 -- 2011 ML, 2011 MJ
A77Chante-Perdrix Obs. in France, 2 in MPECs 2011-M30 & 2011-M31 -- 2011 MD, C/2011 L1
J01Cielo Profundo Obs. in Spain, 6 in MPEC 2011-M31 -- C/2011 L4, C/2009 P1, C/2008 FK75, C/2006 S3, 78P, 48P
850Cordell-Lorenz Obs. in Tennessee, 5 in MPEC 2011-M31 -- C/2011 A3, C/2010 R1, C/2006 S3, 115P, 21P
448Desert Moon Obs. in New Mexico, 2 in MPEC 2011-M30 -- 2011 KO17, 2010 WQ7
J04ESA Optical Ground Station in the Canary Islands, 1 in MPEC 2011-M31 -- 30P
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-M31 -- C/2011 L4
F657Paul Roche in Wales via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-M30 -- 2005 AN26
B83Gieres Obs. in France, 2 in MPEC 2011-M31 -- C/2011 A3, C/2006 S3
J95Great Shefford Obs. in England, 3 in MPECs 2011-M27, 2011-M28 & 2011-M30 -- 2011 MK, 2011 MJ, 2011 MD
H15ISON-NM Obs. in New Mexico, 3 in MPEC 2011-M31 -- C/2011 L4, C/2011 K1, C/2010 X1
D95Kurihara Obs. in Japan, 5 in MPEC 2011-M31 -- C/2011 F1, C/2010 X1, C/2010 G2, 123P, 29P
704LINEAR in New Mexico, 6 in MPECs 2011-M28, 2011-M30 & 2011-M31 -- 2011 MK, 2011 MD, C/2011 L1, 2011 HO, C/2009 UG89, 7358
J38La Vara Obs. in Spain, 2 in MPEC 2011-M31 -- C/2011 F1, 115P
A01Masia Cal Maciarol Modul 1 in Spain, 1 in MPEC 2011-M31 -- C/2011 A3
A02Masia Cal Maciarol Modul 8 in Spain, 1 in MPEC 2011-M31 -- 115P
118Modra Obs. in Slovakia, 2 in MPEC 2011-M31 -- C/2010 R1, C/2007 Q3
213Montcabre Obs. in Spain, 2 in MPEC 2011-M31 -- C/2009 P1, 21P
945Monte Deva Obs. in Spain, 3 in MPEC 2011-M31 -- C/2011 F1, C/2010 G2, C/2006 S3
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2011-M26, 2011-M27, 2011-M29 & 2011-M30 -- 2011 ML, 2011 MJ, 2008 UZ94, 2003 BK47, 216115
J69North Obs. in England, 1 in MPEC 2011-M26 -- 2003 BK47
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2011-M30 -- 2011 LA19, 2011 KP17, 2011 EZ78
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPECs 2011-M30 & 2011-M31 -- 2011 MD, C/2011 F1, C/2011 A3
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-M31 -- C/2011 L4
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 10 in MPEC 2011-M31 -- C/2011 L4, C/2011 L1, C/2011 J3, C/2011 C1, C/2011 A3, C/2010 X1, C/2009 UG89, 240P, 213P, 27P
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 7 in MPECs 2011-M27 & 2011-M31 -- 2011 MJ, C/2010 X1, C/2009 P1, C/2009 F4, C/2006 W3, C/2006 S3, 74P
939Rodeno Obs. in Spain, 1 in MPEC 2011-M31 -- C/2011 A3
104San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2011-M31 -- C/2011 L4
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-M27 -- 2011 MJ
204Schiaparelli Obs. in Italy, 8 in MPECs 2011-M30 & 2011-M31 -- C/2011 L4, C/2011 L1, C/2010 R1, C/2009 P1, 2009 BD, 78P, 48P, 21P
E12Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2011-M30 & 2011-M31 -- C/2011 L4, 2008 EP6, 159368
510Siegen Obs. in Germany, 1 in MPEC 2011-M31 -- C/2009 P1
G68Sierra Stars Obs. in northern California, 1 in MPEC 2011-M31 -- C/2006 S3
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2011-M30 -- 2007 YF1, 2005 AB
291Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2011-M28 & 2011-M30 -- 2011 MK, 2011 KW19, 2011 KQ19, 2011 HC36, 2011 GD60, 2011 AG5, 2006 UC63
I93St. Pardon de Conques Obs. in France, 3 in MPECs 2011-M26, 2011-M28 & 2011-M30 -- 2011 MK, 2011 MD, 2003 BK47
A71Stixendorf Obs. in Austria, 8 in MPEC 2011-M31 -- C/2011 L1, C/2011 A3, C/2010 S1, C/2010 G2, 240P, 123P, 115P, 27P
926Tenagra II Obs. in Arizona, 2 in MPEC 2011-M30 -- 2008 CM, 163348
H10Tzec Maun Obs. Mayhill in New Mexico, 7 in MPEC 2011-M31 -- C/2011 L3, C/2011 J3, C/2009 Y1, C/2009 UG89, C/2009 P1, 48P, 9P
D96Tzec Maun Obs. Moorook in South Australia, 2 in MPEC 2011-M31 -- C/2011 L1, C/2010 X1
B51Vallauris Obs. in France, 2 in MPEC 2011-M31 -- C/2006 S3, 115P
A48Verona Obs. in Italy, 2 in MPEC 2011-M30 -- 2011 LA19, 2011 EZ78
H47Vicksburg Obs. in Mississippi, 2 in MPEC 2011-M31 -- C/2006 S3, 48P
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 24 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 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 MDJPL Sentry15132049-2111476.6e-03-3.77-3.780JPL: "Analysis based on 56 observations spanning 1.8834 days (2011-Jun-22.26489 to 2011-Jun-24.14827)." Diameter approximately 0.008 km. from mean, weighted H=28.0.
NEODyS15132049-2089305.82e-03-3.82-3.820NEODyS: "Based on 63 optical observations (of which 9 are rejected as outliers) from 2011-06-22.266 to 2011-06-24.149."
2011 AG5JPL Sentry20022040-204758.2e-04-1.40-1.401JPL: "Analysis based on 142 observations spanning 166.19 days (2011-Jan-08.2673 to 2011-Jun-23.45965)." Diameter approximately 0.150 km. from mean, weighted H=21.8.
NEODyS15132040-204759.02e-04-1.36-1.361NEODyS: "Based on 142 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-06-23.460."

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 24 June '11

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

2318Grabbed MPEC 2011-M31 - Observations and Orbits of Comets - see above
2002Noted that JPL Sentry has updated its 2011 AG5 risk assessment - see above
1513Noted that NEODyS has updated its 2011 AG5 risk assessment - see above
Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
Noted that NEODyS has posted 2011 MD as an impact risk - see above
Grabbed MPEC 2011-M30 - Daily Orbit Update - see above
0604Grabbed MPEC 2011-M27 - 2011 MJ - see above
Grabbed MPEC 2011-M28 - 2011 MK - see above
Grabbed MPEC 2011-M29 - 2011 ML - see above
0359Grabbed MPEC 2011-M26 - 2003 BK47 - see above