Contents  on 1 August '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 1 August '09

The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, five were "one nighters."

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 August '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.


<< DOU on 1 Aug. '09 >>  MPEC 2009-P03 - "06:08 UT" - Daily Orbit Update


MPEC 2009-P02 - "03:36 UT" - Comets C/2009 M3, 2009 M4, 2009 M5, 2009 M6 (SOHO)


MPEC 2009-P01 - "03:28 UT" - Comets C/2009 L16, 2009 L17, 2009 M1, 2009 M2 (SOHO)

Observers  on 1 August '09

Thirteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 7 in MPEC 2009-P03 -- 2009 OZ7, 2009 OX5, 2009 OW6, 2009 OS5, 2009 OF, 2009 MN8, 2009 KC7
703Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2009-P03 -- 2009 OC3, 2009 ML1, 2009 KJ22, 17511, 163051, 5786, 1943, 433
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 6 in MPEC 2009-P03 -- 2009 OZ4, 2009 OC, 2009 MZ6, 2009 LX, 2002 NW16, 2001 AA50
B19Iluro Obs. in Spain, 5 in MPEC 2009-P03 -- 2002 NW16, 16834, 138883, 9162, 1943
704LINEAR in New Mexico, 2 in MPEC 2009-P03 -- 2009 NE, 16834
J87La Canada Obs. in Spain, 1 in MPEC 2009-P03 -- 2009 NE
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-P03 -- 2009 OW6
D21Shenton Park Obs. in Western Australia, 6 in MPEC 2009-P03 -- 2009 OZ7, 2009 OG, 2009 OC3, 2009 NL, 2009 MC9, 2009 LX
E12Siding Spring Survey (SSS) in New South Wales, 5 in MPEC 2009-P03 -- 2009 OG, 2009 MC9, 2009 KC3, 2009 CR2, 52762
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2009-P01 & 2009-P02 -- C/2009 M6, C/2009 M5, C/2009 M4, C/2009 M3, C/2009 M2, C/2009 M1, C/2009 L17, C/2009 L16
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPECs 2009-P01 & 2009-P02 -- C/2009 M4, C/2009 M3, C/2009 M2, C/2009 L17
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-P03 -- 2000 OB22, 18736
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-P03 -- 2009 OW6
6892Hugh C. Harris via U.S. Naval Obs. Flagstaff Station in Arizona, 1 in MPEC 2009-P03 -- 433
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 1 August '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 OW6JPL Sentry14552074-208027.4e-06-5.57-5.580JPL: "Analysis based on 45 observations spanning 4.1078 days (2009-Jul-27.36058 to 2009-Jul-31.4684)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
NEODyS1455208017.12e-06-5.58-5.580NEODyS: "Based on 46 optical observations (of which 1 are rejected as outliers) from 2009/07/27.361 to 2009/07/31.469."

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 August '09

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

1455Noted that JPL Sentry has updated its 2009 OW6 risk assessment - see above
Noted that NEODyS has updated its 2009 OW6 risk assessment - see above
Grabbed MPEC 2009-P03 - Daily Orbit Update - see above
0500Grabbed MPEC 2009-P01 - Comets C/2009 L16, 2009 L17, 2009 M1, 2009 M2 (SOHO) - see above
Grabbed MPEC 2009-P02 - Comets C/2009 M3, 2009 M4, 2009 M5, 2009 M6 (SOHO) - see above