Contents  on 22 July '09

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 22 July '09

The MPC's NEO Confirmation Page has 2 listings: 2 new

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters." So far The Tracking News has counted a total of three listings on the NEOCP at some point 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 22 July '09

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been three MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2009-O25 - "23:07 UT" - Comets C/2009 A8, 2009 A9, 2009 A10, 2009 O1 (STEREO)


MPEC 2009-O24 - "19:18 UT" - 2004 VA15


<< DOU on 22 July '09 >>  MPEC 2009-O23 - "06:07 UT" - Daily Orbit Update

Observers  on 22 July '09

Eighteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2009-O23 -- 2009 OF
H55Astronomical Research Obs. (ARO) in Illinois, 6 in MPEC 2009-O23 -- 2009 OF, 2009 FN28, 2005 GG, 2004 BE85, 2002 VC92, 1990 HA
B88Bigmuskie Obs. in Italy, 1 in MPEC 2009-O23 -- 2000 OB22
I21El Condor Obs. in Argentina, 6 in MPEC 2009-O23 -- 2009 OG, 2009 MC9, 24761, 17274, 143651, 5626
151Eschenberg Obs. in Switzerland, 3 in MPEC 2009-O23 -- 2009 OF, 2009 NJ, 2002 LV
J95Great Shefford Obs. in England, 2 in MPEC 2009-O23 -- 2009 NL, 2001 AA50
J75La Sagra Obs. in Spain, 1 in MPEC 2009-O23 -- 2009 NH
560Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2009-O23 -- 2009 OF, 2009 MX6, 2000 OB22
A13Naef Obs. in Switzerland, 5 in MPEC 2009-O23 -- 2009 OC, 2009 NL, 2009 ML1, 2009 HB82, 2001 OA14
A53Peschiera del Garda Obs. in Italy, 3 in MPEC 2009-O23 -- 2009 OC, 2009 NE, 2002 LV
C494HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 3 in MPEC 2009-O25 -- C/2009 A9, C/2009 A8, C/2009 A10
C495COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2009-O25 -- C/2009 O1
C505COR2-B instrument (5) aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2009-O25 -- C/2009 O1
434San Benedetto Po Obs. in Italy, 2 in MPEC 2009-O23 -- 2002 LV, 162483
204Schiaparelli Obs. in Italy, 5 in MPEC 2009-O23 -- 2009 OF, 2009 OC, 2005 SN25, 2001 AA50, 162483
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-O23 & 2009-O24 -- 2005 AD3, 2004 VA15
A71Stixendorf Obs. in Austria, 1 in MPEC 2009-O23 -- 3200
198Wildberg Obs. in Germany, 1 in MPEC 2009-O23 -- 16960
J08Zonalunar Obs. in Spain, 1 in MPEC 2009-O23 -- 2007 LL
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 22 July '09

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2358 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. Beginning Jan. 22nd, both are also posting impact solutions beyond 100 years for a few objects.
For the latest official risk assessments, and for explanations of the terminology, see the JPL NEO Program Sentry and NEODyS CLOMON (backup) 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
2009 OFJPL Sentry1400203912.0e-06-3.68-3.680JPL: "Analysis based on 67 observations spanning 4.6830 days (2009-Jul-17.21281 to 2009-Jul-21.89584)." Diameter approximately 0.190 km. from mean, weighted H=21.3.
NEODyS1400203912.43e-06-3.59-3.590NEODyS: "Based on 67 optical observations (of which 1 are rejected as outliers) from 2009/07/17.214 to 2009/07/21.897."

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 22 July '09

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

2323Grabbed MPEC 2009-O25 - Comets C/2009 A8, 2009 A9, 2009 A10, 2009 O1 (STEREO) - see above
2000Grabbed MPEC 2009-O24 - 2004 VA15 - see above
1400Noted that JPL Sentry has updated its 2009 OF risk assessment - see above
Noted that NEODyS has updated its 2009 OF risk assessment - see above
Grabbed MPEC 2009-O23 - Daily Orbit Update - see above