Contents  on 28 July '08

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 28 July '08

The MPC's NEO Confirmation Page has 5 listings: 1 new, 4 updated

When last checked at 2357 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one new and four updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of seven objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs  on 28 July '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there have been four MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-O39 - "20:48 UT" - 2008 JA8


MPEC 2008-O38 - "16:20 UT" - 2008 OX1


MPEC 2008-O37 - "13:37 UT" - 2008 OO1


<< DOU on 28 July '08 >>  MPEC 2008-O36 - "06:07 UT" - Daily Orbit Update

Observers  on 28 July '08

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 4 in MPECs 2008-O36 & 2008-O37 -- 2008 OO1, 2008 OO, 2008 MU1, 2008 JQ14
J27El Guijo Obs. in Spain, 3 in MPEC 2008-O36 -- 2005 RC34, 90403, 1917
J95Great Shefford Obs. in England, 2 in MPECs 2008-O36 & 2008-O37 -- 2008 OO1, 2008 OM
379Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-O36 -- 2005 RC34, 11398, 8567
196Homburg-Erbach Obs. in Germany, 1 in MPEC 2008-O36 -- 8567
620Mallorca Obs. on Mallorca, 1 in MPEC 2008-O36 -- 2008 OO
900Moriyama Obs. in Japan, 2 in MPECs 2008-O36 & 2008-O38 -- 2008 OX1, 2008 OO
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-O37 & 2008-O38 -- 2008 OX1, 2008 OO1
644NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2008-O39 -- 2008 JA8
608NEAT's USAF Haleakala telescope in Hawaii, 1 in MPEC 2008-O39 -- 2008 JA8
B38Santa Mama Obs. in Italy, 2 in MPEC 2008-O36 -- 2005 RC34, 35107
E12Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2008-O36, 2008-O37 & 2008-O38 -- 2008 OX1, 2008 OO1, 2008 ON, 2008 OM, 2008 NS1, 2008 MZ
H53Thompsonville Obs. in Illinois, 2 in MPEC 2008-O36 -- 35107, 11398
F85Tiki Obs. in Tahiti, 1 in MPEC 2008-O39 -- 2008 JA8
B42Vitebsk Obs. in Belarus, 1 in MPEC 2008-O36 -- 35107
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 July '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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
2008 OO1JPL Sentry1558210719.7e-07-6.13-6.130JPL: "Analysis based on 19 observations spanning 1.8232 days (2008-Jul-26.55201 to 2008-Jul-28.37521)." Diameter approximately 0.039 km. from mean, weighted H=24.7.
2008 OOJPL Sentry14512049-2108975.9e-07-3.61-4.710JPL: "Analysis based on 44 observations spanning 1.5627 days (2008-Jul-26.09211 to 2008-Jul-27.65479)." Diameter approximately 0.401 km. from mean, weighted H=19.6.
NEODyS14512049-2090594.38e-07-3.68-3.960NEODyS: "Based on 44 optical observations (of which 0 are rejected as outliers) from 2008/07/26.093 to 2008/07/27.656."

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 28 July '08

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

2108Grabbed MPEC 2008-O39 - 2008 JA8 - see above
1758Grabbed MPEC 2008-O38 - 2008 OX1 - see above
1558Noted that JPL Sentry has posted 2008 OO1 as an impact risk - see above
1451Noted that JPL Sentry has updated its 2008 OO risk assessment - see above
Noted that NEODyS has updated its 2008 OO risk assessment - see above
Grabbed MPEC 2008-O36 - Daily Orbit Update - see above
Grabbed MPEC 2008-O37 - 2008 OO1 - see above