Contents  on 10 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.

Radar Astrometry  on 10 July '09

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:


Data update noted at 2358 UTC when the database was dated 10 July

NEOCP Activity  on 10 July '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (checked at 2358 UTC). It was last noted active on July 5th.

New MPECs  on 10 July '09

Minor Planet Electronic Circulars

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


MPEC 2009-N34 - "18:57 UT" - Comets C/2009 H5, 2009 H6, 2009 H7, 2009 H8 (SOHO)


MPEC 2009-N33 - "18:50 UT" - Comet C/2009 G7, 2009 G8, 2009 H3, 2009 H4 (SOHO)


MPEC 2009-N32 - "14:46 UT" - 2008 KV42


<< DOU on 10 July '09 >>  MPEC 2009-N31 - "06:05 UT" - Daily Orbit Update

Observers  on 10 July '09

Twelve observing facilities appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2008 EV5
300Bisei Spaceguard Center in Japan, 2 in MPEC 2009-N31 -- 2009 HF21, 2009 DF1
H26Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-N31 -- 2009 NE, 2002 LV
695Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2009-N32 -- 2008 KV42
568Mauna Kea in Hawaii, 1 in MPEC 2009-N32 -- 2008 KV42
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-N31 -- 2009 KM7
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2009-N31 -- 2009 NE, 2002 LV
I20Rio Cuarto Obs. in Argentina, 3 in MPEC 2009-N31 -- 2009 MA, 2005 SG19, 154229
260_Sergio Foglia & Maura Tombelli in Italy using the Siding Spring Digitized Sky Survey in New South Wales, 1 in MPEC 2009-N31 -- 2009 KM7
E12Siding Spring Survey (SSS) in New South Wales, 11 in MPEC 2009-N31 -- 2009 MX6, 2009 MC9, 2009 MB9, 2008 NP3, 152560, 108519, 5693, 4015, 3554, 1863, 1036
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 7 in MPECs 2009-N33 & 2009-N34 -- C/2009 H7, C/2009 H6, C/2009 H5, C/2009 H4, C/2009 H3, C/2009 G8, C/2009 G7
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPECs 2009-N33 & 2009-N34 -- C/2009 H8, C/2009 G7
587Sormano Obs. in Italy, 3 in MPEC 2009-N31 -- 2009 MX6, 2009 MS, 2009 HD21
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 10 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 MB9JPL Sentry1400203712.9e-09-5.28-5.280JPL: "Analysis based on 32 observations spanning 9.6712 days (2009-Jun-29.47208 to 2009-Jul-09.14333)." Diameter approximately 0.640 km. from mean, weighted H=18.6.
NEODyS1400203713.54e-09-4.96-4.960NEODyS: "Based on 32 optical observations (of which 0 are rejected as outliers) from 2009/06/29.473 to 2009/07/09.144."

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 10 July '09

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

2358Noted Radar Astrometry database update - see above
2006Grabbed MPEC 2009-N34 - Comets C/2009 H5, 2009 H6, 2009 H7, 2009 H8 (SOHO) - see above
1900Grabbed MPEC 2009-N33 - Comet C/2009 G7, 2009 G8, 2009 H3, 2009 H4 (SOHO) - see above
1501Grabbed MPEC 2009-N32 - 2008 KV42 - see above
1400Noted that JPL Sentry has updated its 2009 MB9 risk assessment - see above
Noted that NEODyS has updated its 2009 MB9 risk assessment - see above
Grabbed MPEC 2009-N31 - Daily Orbit Update - see above