Contents  on 28 September '08


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 September '08

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

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had eight updated listings. Of these, two were "one nighters."

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 September '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 28 Sept. '08 >>  MPEC 2008-S83 - "06:07 UT" - Daily Orbit Update

Observers  on 28 September '08

A total of 20 observing facilities appear in today's MPEC.

CodeObserver / observatory
H55Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2008-S83 -- 2008 SR7, 2008 SQ7, 2008 SP7, 2008 SH82, 2008 RW24, 2008 OP8, 2000 TV28, 153951
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-S83 -- 2006 BT7
B20Carmelita Obs. in Spain, 1 in MPEC 2008-S83 -- 190119
703Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2008-S83 -- 2008 QT3, 2001 SQ3, 142348
G58Chabot Obs. in northern California, 1 in MPEC 2008-S83 -- 2005 TZ51
113Drebach Obs. in Germany, 1 in MPEC 2008-S83 -- 2008 MR1
808El Leoncito Obs. in Argentina, 10 in MPEC 2008-S83 -- 2008 RV, 2008 QS11, 2008 PL3, 87684, 86829, 39572, 163000, 5332, 4179, 3691
240Herrenberg Obs. in Germany, 2 in MPEC 2008-S83 -- 66008, 39572
B15Inastars Obs. in Germany, 1 in MPEC 2008-S83 -- 85818
474Mt. John Obs. in New Zealand, 2 in MPEC 2008-S83 -- 2008 SP7, 2006 TC
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2008-S83 -- 2008 HB38, 2000 TV28
A13Naef Obs. in Switzerland, 1 in MPEC 2008-S83 -- 2008 SQ
J69North Obs. in England, 1 in MPEC 2008-S83 -- 137032
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2008-S83 -- 2008 SQ, 2008 MR1, 2008 JZ7, 2005 TZ51
J53Posadas Obs. in Spain, 4 in MPEC 2008-S83 -- 2003 GW, 2002 SS41, 164400, 163000
H36Sandlot Obs. in Kansas, 1 in MPEC 2008-S83 -- 2008 SH82
E12Siding Spring Survey (SSS) in New South Wales, 8 in MPEC 2008-S83 -- 2008 SR1, 2008 SJ82, 2008 QS11, 2008 PH3, 2008 KZ5, 2006 TC, 2006 TB, 2005 WD1
A98Taurus-1 Obs. in Belarus, 2 in MPEC 2008-S83 -- 185851, 137032
A55Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-S83 -- 2008 QS11
B42Vitebsk Obs. in Belarus, 1 in MPEC 2008-S83 -- 164400
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 28 September '08

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.
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.





Notes for Today's Latest Risk Assessments
2008 SJ82JPL Sentry14562088-209643.2e-08-5.67-6.070JPL: "Analysis based on 15 observations spanning 1.0351 days (2008-Sep-26.74755 to 2008-Sep-27.7827)." Diameter approximately 0.240 km. from mean, weighted H=20.8.
NEODyS1456208817.46e-09-6.36-6.360NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/09/26.748 to 2008/09/27.783."
2008 SH82NEODyS14562025-2081223.27e-08-5.35-5.900NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/09/27.240."

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 September '08

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

1456Noted that NEODyS has posted 2008 SH82 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 SJ82 risk assessment - see above
Noted that NEODyS has posted 2008 SJ82 as an impact risk - see above
Grabbed MPEC 2008-S83 - Daily Orbit Update - see above