Contents  on 1 July '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 1 July '11

The MPC's NEO Confirmation Page has 2 listings

When last checked at 2342 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two objects listed. Both of these were "one nighters." So far The Tracking News has counted a total of eight 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 1 July '11

Minor Planet Electronic Circulars

As of last check at 2342 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2011-N06 - "19:43 UT" - 2011 EZ40


MPEC 2011-N05 - "14:42 UT" - 2009 XB2


MPEC 2011-N04 - "13:50 UT" - 2011 MO4


MPEC 2011-N03 - "13:48 UT" - 2011 MN4


MPEC 2011-N02 - "13:40 UT" - 2011 MM4


<< DOU on 1 July '11 >>  MPEC 2011-N01 - "07:06 UT" - Daily Orbit Update

Observers  on 1 July '11

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

CodeObserver / observatory
7057program code 7 via Apache Point Obs. in New Mexico, 1 in MPEC 2011-N01 -- 2006 SV189
H21Astronomical Research Obs. Westfield in Illinois, 16 in MPECs 2011-N01 & 2011-N02 -- 2011 MZ2, 2011 MY2, 2011 MW2, 2011 MW1, 2011 MV1, 2011 MU, 2011 MT, 2011 MM4, 2011 MJ, 2011 ME, 2011 LJ1, 2011 LC19, 2011 LA19, 2011 KN9, 2011 KH4, 2011 KE3
I99Blanquita Obs. in Spain, 2 in MPEC 2011-N01 -- 2011 DL19, 68348
215Buchloe Obs. in Germany, 1 in MPEC 2011-N01 -- 2011 MD
703Catalina Sky Survey in Arizona, 1 in MPEC 2011-N04 -- 2011 MO4
807|Robert Holmes via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 9 in MPECs 2011-N01 & 2011-N05 -- 2011 MZ2, 2011 MY2, 2011 MX2, 2011 MW1, 2011 MV1, 2011 ML, 2011 EZ40, 2011 BA45, 2009 XB2
B92Chinon Obs. in France, 1 in MPEC 2011-N01 -- 1036
H26Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2011-N01 -- 2011 EZ78
F65$Ernesto Guido in Italy via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-N02 -- 2011 MM4
F65%Tim Lister in southern California via Faulkes Telescope North in Hawaii, 1 in MPEC 2011-N02 -- 2011 MM4
J95Great Shefford Obs. in England, 2 in MPECs 2011-N01 & 2011-N02 -- 2011 MM4, 2011 MD
695]Mark Trueblood via Kitt Peak Natl. Obs. (KPNO) in Arizona, 5 in MPECs 2011-N01 & 2011-N02 -- 2011 MM4, 2011 LJ19, 2011 LC19, 2011 JK, 2011 EZ78
704LINEAR in New Mexico, 2 in MPECs 2011-N01 & 2011-N04 -- 2011 MO4, 153792
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2011-N02 -- 2011 MM4
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2011-N02 -- 2011 MM4
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2011-N03 -- 2011 MN4
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2011-N06 -- 2011 EZ40
F51Pan-STARRS 1 (PS1) in Hawaii, 3 in MPECs 2011-N01 & 2011-N02 -- 2011 MM4, 194126, 4954
H06|Hidetaka Sato in Japan via RAS Obs. Mayhill in New Mexico, 2 in MPECs 2011-N02 & 2011-N04 -- 2011 MO4, 2011 MM4
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 3 in MPEC 2011-N01 -- 2011 MQ3, 2011 KF4, 2011 GA55
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-N02 -- 2011 MM4
204Schiaparelli Obs. in Italy, 5 in MPEC 2011-N01 -- 2011 MK, 2011 ME, 2011 DL19, 2008 LV16, 2005 XN4
E12Siding Spring Survey (SSS) in New South Wales, 7 in MPEC 2011-N01 -- 2011 GA55, 2006 UQ217, 2002 CM1, 267494, 18882, 4953, 3199
291Spacewatch 1.8m telescope in Arizona, 4 in MPECs 2011-N01, 2011-N03 & 2011-N04 -- 2011 MO4, 2011 MN4, 2011 HR, 2010 LM68
B01Taunus Obs. in Germany, 1 in MPEC 2011-N02 -- 2011 MM4
926Tenagra II Obs. in Arizona, 1 in MPEC 2011-N02 -- 2011 MM4
I76Tesla Obs., 1 in MPEC 2011-N01 -- 2011 EZ78
H10Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2011-N04 -- 2011 MO4
D96Tzec Maun Obs. Moorook in South Australia, 1 in MPEC 2011-N01 -- 2011 EZ78
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 July '11

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2342 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 Sentry20272068-2111127.1e-05-5.83-6.260JPL: "Analysis based on 531 observations spanning 8.8010 days (2011-Jun-22.26489 to 2011-Jul-01.06592)." Diameter approximately 0.011 km. from mean, weighted H=27.4.

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 1 July '11

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

2027Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
Grabbed MPEC 2011-N06 - 2011 EZ40 - see above
1712Grabbed MPEC 2011-N05 - 2009 XB2 - see above
1434Grabbed MPEC 2011-N01 - Daily Orbit Update - see above
Grabbed MPEC 2011-N02 - 2011 MM4 - see above
Grabbed MPEC 2011-N03 - 2011 MN4 - see above
Grabbed MPEC 2011-N04 - 2011 MO4 - see above