Contents  on 25 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 25 June '11

The MPC's NEO Confirmation Page has 17 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had seventeen objects listed. Of these, ten were "one nighters." So far The Tracking News has counted a total of 28 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 25 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-M37 - "19:03 UT" - Comet C/2011 M1 (LINEAR)


MPEC 2011-M36 - "16:00 UT" - 2011 MX


MPEC 2011-M35 - "15:46 UT" - 2011 MV


MPEC 2011-M34 - "15:38 UT" - 2011 MU


MPEC 2011-M33 - "15:26 UT" - 2011 MT


<< DOU on 25 June '11 >>  MPEC 2011-M32 - "07:06 UT" - Daily Orbit Update

Observers  on 25 June '11

A total of 28 observers appear in today's MPECs.

CodeObserver / observatory
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-M32 -- 2011 MD
I99Blanquita Obs. in Spain, 2 in MPEC 2011-M32 -- 7889, 1917
G51Byrne Obs., 1 in MPEC 2011-M32 -- 2011 MD
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2011-M32, 2011-M33 & 2011-M34 -- 2011 MU, 2011 MT, 2011 MK, 2011 KP17, 2004 JO2, 2003 BK47, 162463
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 2 in MPECs 2011-M33 & 2011-M34 -- 2011 MU, 2011 MT
B92Chinon Obs. in France, 1 in MPEC 2011-M32 -- 1036
J01Cielo Profundo Obs. in Spain, 1 in MPEC 2011-M32 -- 2011 MD
448Desert Moon Obs. in New Mexico, 2 in MPEC 2011-M32 -- 2011 MD, 159504
J95Great Shefford Obs. in England, 4 in MPECs 2011-M34, 2011-M35, 2011-M36 & 2011-M37 -- 2011 MX, 2011 MV, 2011 MU, C/2011 M1
704LINEAR in New Mexico, 11 in MPECs 2011-M32 & 2011-M37 -- 2011 MK, 2011 MC, C/2011 M1, 2011 HO, 2011 FB29, 2003 BK47, 275714, 163335, 162474, 7889, 1866
D35Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2011-M33 -- 2011 MT
H01Magdalena Ridge Obs. (MRO) in New Mexico, 5 in MPECs 2011-M33, 2011-M34, 2011-M35, 2011-M36 & 2011-M37 -- 2011 MX, 2011 MV, 2011 MU, 2011 MT, C/2011 M1
B67Mirasteilas Obs. in Switzerland, 1 in MPEC 2011-M32 -- 2011 KN9
118Modra Obs. in Slovakia, 1 in MPEC 2011-M32 -- 2011 MD
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2011-M33, 2011-M35 & 2011-M36 -- 2011 MX, 2011 MV, 2011 MT
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2011-M32 -- 175189, 10145
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2011-M32 -- 2011 MD, 2011 EZ78
H06*Rolando Ligustri in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2011-M37 -- C/2011 M1
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 3 in MPECs 2011-M32, 2011-M34 & 2011-M37 -- 2011 MU, 2011 MD, C/2011 M1
H36Sandlot Obs. in Kansas, 5 in MPECs 2011-M32, 2011-M33, 2011-M34 & 2011-M37 -- 2011 MU, 2011 MT, 2011 MK, 2011 MD, C/2011 M1
204Schiaparelli Obs. in Italy, 1 in MPEC 2011-M32 -- 2011 MD
E12Siding Spring Survey in New South Wales, 1 in MPEC 2011-M33 -- 2011 MT
691Spacewatch 0.9m telescope in Arizona, 3 in MPECs 2011-M32 & 2011-M33 -- 2011 MT, 2011 KP17, 2011 HL7
291Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2011-M32, 2011-M33, 2011-M35 & 2011-M36 -- 2011 MX, 2011 MV, 2011 MT, 2011 MF, 2011 KW19, 2011 KQ19, 2011 KQ12, 2011 AG5, 2010 JU39, 2006 UC63, 2001 BZ39
A71Stixendorf Obs. in Austria, 1 in MPEC 2011-M37 -- C/2011 M1
6734Mike Hicks via Table Mtn. Obs. in southern California, 2 in MPECs 2011-M32 & 2011-M34 -- 2011 MU, 2011 MJ
926Tenagra II Obs. in Arizona, 2 in MPEC 2011-M32 -- 2008 CM, 159368
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-M37 -- C/2011 M1
198Wildberg Obs. in Germany, 1 in MPEC 2011-M32 -- 2011 MD
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 25 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 MXJPL Sentry18052059-2086309.3e-05-5.07-5.460JPL: "Analysis based on 22 observations spanning 2.0792 days (2011-Jun-23.32845 to 2011-Jun-25.40765)." Diameter approximately 0.014 km. from mean, weighted H=26.9.
2011 MDJPL Sentry19382049-2107529.4e-04-4.74-4.850JPL #3 for the day: "Analysis based on 137 observations spanning 3.0368 days (2011-Jun-22.26489 to 2011-Jun-25.301707)." Diameter approximately 0.008 km. from mean, weighted H=28.1.
NEODyS15542049-2090343.07e-03-4.15-4.160NEODyS: "Based on 134 optical observations (of which 11 are rejected as outliers) from 2011-06-22.266 to 2011-06-25.165."
2011 AG5NEODyS15542040-204768.66e-04-1.38-1.381NEODyS: "Based on 145 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-06-24.419."

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 25 June '11

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

1938Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
Grabbed MPEC 2011-M37 - Comet C/2011 M1 (LINEAR) - see above
1805Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
Noted that JPL Sentry has posted 2011 MX as an impact risk - see above
Grabbed MPEC 2011-M36 - 2011 MX - see above
1554Noted 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 updated its 2011 MD risk assessment - see above
Grabbed MPEC 2011-M32 - Daily Orbit Update - see above
Grabbed MPEC 2011-M33 - 2011 MT - see above
Grabbed MPEC 2011-M34 - 2011 MU - see above
Grabbed MPEC 2011-M35 - 2011 MV - see above