Contents  on 5 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 5 July '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." 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 5 July '11

Minor Planet Electronic Circulars

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


MPEC 2011-N23 - "15:08 UT" - 2011 NQ


MPEC 2011-N22 - "14:54 UT" - 2011 NP


<< DOU on 5 July '11 >>  MPEC 2011-N21 - "07:06 UT" - Daily Orbit Update

Observers  on 5 July '11

Eighteen observers appear in today's MPECs.

CodeObserver / observatory
7057Krisztian Sarneczky via Apache Point Obs. in New Mexico, 8 in MPEC 2011-N21 -- 2009 WC26, 2009 SU19, 2009 SO103, 2007 TG1, 2007 SV2, 2004 TP20, 2004 TH10, 2004 QF1
H21Astronomical Research Obs. Westfield in Illinois, 2 in MPECs 2011-N22 & 2011-N23 -- 2011 NQ, 2011 NP
300Bisei Spaceguard Center in Japan, 1 in MPEC 2011-N22 -- 2011 NP
I99Blanquita Obs. in Spain, 4 in MPEC 2011-N21 -- 2011 DL19, 2003 BK47, 8567, 433
703Catalina Sky Survey in Arizona, 1 in MPEC 2011-N22 -- 2011 NP
807|Robert Holmes via Cerro Tololo Inter-American Obs. in Chile, 1 in MPEC 2011-N23 -- 2011 NQ
G58Chabot Obs. in northern California, 3 in MPEC 2011-N21 -- 2011 ND, 2007 RT9, 3988
B92Chinon Obs. in France, 1 in MPEC 2011-N21 -- 1036
I19El Gato Gris Obs. in Argentina, 1 in MPEC 2011-N22 -- 2011 NP
J95Great Shefford Obs. in England, 1 in MPEC 2011-N21 -- 2011 MD5
A17Guidestar Obs. in Germany, 3 in MPEC 2011-N21 -- 2011 MK, 2011 LD19, 2001 RZ11
H15ISON-NM Obs. in New Mexico, 1 in MPEC 2011-N21 -- 7889
I24Lake of the Woods Obs., 1 in MPEC 2011-N21 -- 68348
D35Lulin Minor Bodies Tracking (LIMIT) in Taiwan, 3 in MPECs 2011-N21, 2011-N22 & 2011-N23 -- 2011 NQ, 2011 NP, 2003 BK47
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2011-N23 -- 2011 NQ
F51Pan-STARRS 1 in Hawaii, 1 in MPEC 2011-N21 -- 2102
D90`Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2011-N22 -- 2011 NP
H36Sandlot Obs. in Kansas, 1 in MPEC 2011-N21 -- 2011 ME
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 July '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 MD5JPL Sentry1618R E M O V E DJPL: Risk listing removed at 0950 UTC.
NEODyS1618R E M O V E D-
2011 MDJPL Sentry18002067-2111311.1e-03-4.87-5.330JPL: "Analysis based on 1433 observations spanning 5.2650 days (2011-Jun-22.26489 to 2011-Jun-27.52989)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
NEODyS1618R E M O V E D-

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 5 July '11

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

1800Noted that JPL Sentry has updated its 2011 MD risk assessment - see above
1618Noted that NEODyS has removed 2011 MD as an impact risk - see above
Noted that JPL Sentry has removed 2011 MD5 as an impact risk - see above
Noted that NEODyS has removed 2011 MD5 as an impact risk - see above
Grabbed MPEC 2011-N21 - Daily Orbit Update - see above
Grabbed MPEC 2011-N22 - 2011 NP - see above
Grabbed MPEC 2011-N23 - 2011 NQ - see above