Contents  on 29 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 29 June '11

The MPC's NEO Confirmation Page has 5 listings

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five objects listed. Of these, two were "one nighters." The Tracking News counted a total of seven listings on the NEOCP on this day.

New MPECs  on 29 June '11

Minor Planet Electronic Circulars

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


MPEC 2011-M51 - "23:48 UT" - 2011 MQ3


<< DOU on 29 June '11 >>  MPEC 2011-M50 - "07:06 UT" - Daily Orbit Update

Observers  on 29 June '11

A total of 20 observers appeared in this day's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2011-M51 -- 2011 MQ3
7057program code 7 via Apache Point Obs. in New Mexico, 4 in MPEC 2011-M50 -- 2006 SP198, 2005 UP64, 2005 SH26, 2005 QG30
H21Astronomical Research Obs. Westfield in Illinois, 5 in MPEC 2011-M50 -- 2011 MU, 2011 MK, 2011 MJ, 2011 ME, 2011 LA19
703Catalina Sky Survey (CSS) in Arizona, 7 in MPEC 2011-M50 -- 2011 JP29, 2010 NJ1, 68350, 263976, 242450, 20086, 154453
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2011-M50 & 2011-M51 -- 2011 MW1, 2011 MV1, 2011 MT, 2011 MQ3, 2011 ML, 2011 MC, 2011 MB2, 2011 LJ20, 2011 KO17
C13Como Obs. in Italy, 1 in MPEC 2011-M50 -- 2008 VH
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 4 in MPEC 2011-M50 -- 2011 LD19, 2011 KP17, 2011 KN9, 2011 DL19
595Farra d'Isonzo Obs. in Italy, 2 in MPECs 2011-M50 & 2011-M51 -- 2011 MQ3, 2011 MD
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-M51 -- 2011 MQ3
J95Great Shefford Obs. in England, 2 in MPECs 2011-M50 & 2011-M51 -- 2011 MQ3, 2011 MD
A17Guidestar Obs. in Germany, 3 in MPEC 2011-M50 -- 2011 ME, 2011 LD19, 2003 BK47
G89Kachina Obs. in Arizona, 1 in MPEC 2011-M50 -- 2011 CQ4
G96Mt. Lemmon Survey (MLS) in Arizona, 3 in MPECs 2011-M50 & 2011-M51 -- 2011 MQ3, 2003 MT9, 190135
A24New Millennium Obs. in Italy, 28 in MPEC 2011-M50 -- 2011 LA19, 2011 KP17, 2011 KN9, 2011 JP29, 2011 JA8, 2011 EZ78, 2010 NJ1, 2009 WW104, 2008 VH, 2004 LH, 2004 JO2, 2003 AL73, 68348, 37336, 275714, 267759, 20086, 163250, 162474, 137170, 7482, 4034, 3988, 3288, 3103, 1917, 1866, 1036
F51Pan-STARRS 1 (PS1) in Hawaii, 2 in MPEC 2011-M50 -- 256412, 251346
D29Purple Mtn. Obs. Xuyi Station in China, 1 in MPEC 2011-M50 -- 2011 MD
H36Sandlot Obs. in Kansas, 2 in MPECs 2011-M50 & 2011-M51 -- 2011 MQ3, 2011 MD
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2011-M50 -- 2009 CQ5, 16834
291Spacewatch 1.8m telescope in Arizona, 10 in MPEC 2011-M50 -- 2011 MV, 2011 MF, 2011 KQ19, 2011 KQ12, 2011 AG5, 2010 NJ1, 2007 BF72, 2004 RW164, 2003 QC10, 2002 RD27
A78Stia Obs. in Italy, 2 in MPEC 2011-M50 -- 20086, 7482
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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 Sentry22032068-2111281.5e-04-5.49-6.310JPL: "Analysis based on 493 observations spanning 6.8153 days (2011-Jun-22.26489 to 2011-Jun-29.080227)." Diameter approximately 0.011 km. from mean, weighted H=27.4.
NEODyS14252077-208333.93e-05-6.29-6.520NEODyS: "Based on 507 optical observations (of which 56 are rejected as outliers) from 2011-06-22.266 to 2011-06-29.081."
2011 AG5NEODyS14252040-204768.5e-04-1.38-1.381NEODyS: "Based on 159 optical observations (of which 0 are rejected as outliers) from 2011-01-08.268 to 2011-06-28.370."

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 29 June '11

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

2359Grabbed MPEC 2011-M51 - 2011 MQ3 - see above
2203Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
1425Noted that NEODyS has updated its 2011 AG5 risk assessment - see above
Noted that NEODyS has updated its 2011 MD risk assessment - see above
Grabbed MPEC 2011-M50 - Daily Orbit Update - see above