Contents  on 29 September '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 29 September '08

The MPC's NEO Confirmation Page has 10 listings: 2 new, 8 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and eight updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 21 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 29 September '08

Minor Planet Electronic Circulars

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


MPEC 2008-S92 - "22:48 UT" - 2008 SJ148


MPEC 2008-S91 - "22:44 UT" - 2008 SH148


MPEC 2008-S90 - "22:33 UT" - 2008 SG148


MPEC 2008-S89 - "16:49 UT" - 2008 SE85


MPEC 2008-S88 - "16:46 UT" - 2008 SD85


MPEC 2008-S87 - "16:44 UT" - 2008 SC85


MPEC 2008-S86 - "16:40 UT" - 2008 SB85


<< DOU on 29 Sept. '08 >>  MPEC 2008-S85 - "06:08 UT" - Daily Orbit Update


MPEC 2008-S84 - "03:57 UT" - 2007 TD66

Observers  on 29 September '08

A total of 33 observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 1 in MPEC 2008-S85 -- 2008 SU1
H55Astronomical Research Obs. (ARO) in Illinois, 10 in MPECs 2008-S84, 2008-S85, 2008-S86 & 2008-S87 -- 2008 SV11, 2008 ST7, 2008 SC85, 2008 SB85, 2008 RT, 2008 QY, 2008 MZ, 2007 TD66, 2002 RQ25, 2000 AX93
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-S85 -- 39572
A74Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-S88 -- 2008 SD85
B09Capannoli Obs. in Italy, 2 in MPEC 2008-S85 -- 2008 SQ, 2008 SE
703Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2008-S85 & 2008-S89 -- 2008 SE85, 2008 QS11, 2004 EN20, 2002 TB70, 2002 SP, 2001 SW269, 189700
113Drebach Obs. in Germany, 1 in MPEC 2008-S87 -- 2008 SC85
595Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-S90 -- 2008 SG148
F654Jim Bedient in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2008-S87 -- 2008 SC85
683Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2008-S85 -- 96744
J95Great Shefford Obs. in England, 3 in MPECs 2008-S86, 2008-S87 & 2008-S88 -- 2008 SD85, 2008 SC85, 2008 SB85
240Herrenberg Obs. in Germany, 3 in MPEC 2008-S85 -- 2008 SR7, 2001 SK9, 141851
A35Hormersdorf Obs. in Germany, 1 in MPEC 2008-S85 -- 2008 SQ
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-S87 -- 2008 SC85
J66Kinver Obs. in England, 1 in MPEC 2008-S87 -- 2008 SC85
J59Linceo Obs. in Spain, 1 in MPEC 2008-S85 -- 2008 SR1
A06Mataro Obs. in Spain, 2 in MPEC 2008-S85 -- 4179, 1620
B67Mirasteilas Obs. in Switzerland, 4 in MPEC 2008-S85 -- 2008 PL3, 168044, 162900, 136923
108Montelupo Obs. in Italy, 1 in MPEC 2008-S85 -- 8567
474Mt. John Obs. in New Zealand, 2 in MPECs 2008-S86 & 2008-S87 -- 2008 SC85, 2008 SB85
G96Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-S85, 2008-S86, 2008-S87, 2008-S88, 2008-S89, 2008-S90, 2008-S91 & 2008-S92 -- 2008 SJ148, 2008 SH148, 2008 SG148, 2008 SE85, 2008 SD85, 2008 SC85, 2008 SB85, 90075, 162039, 155140
A13Naef Obs. in Switzerland, 1 in MPEC 2008-S85 -- 2008 RH1
423North Ryde Obs. in New South Wales, 1 in MPEC 2008-S85 -- 3753
6581Dave Balam via Plaskett 1.8m Telescope in British Columbia, 4 in MPECs 2008-S86, 2008-S88, 2008-S90 & 2008-S91 -- 2008 SH148, 2008 SG148, 2008 SD85, 2008 SB85
D90.Cristovao Jacques in Brazil via RAS Obs. Moorook in South Australia, 1 in MPEC 2008-S89 -- 2008 SE85
473Remanzacco Obs. in Italy, 1 in MPEC 2008-S87 -- 2008 SC85
854Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-S89 -- 2008 SE85
H36Sandlot Obs. in Kansas, 2 in MPECs 2008-S86 & 2008-S87 -- 2008 SC85, 2008 SB85
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-S85 -- 2007 RF5, 2001 RV17
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-S86 -- 2008 SB85
291Spacewatch 1.8m telescope in Arizona, 8 in MPECs 2008-S85, 2008-S86 & 2008-S87 -- 2008 SW11, 2008 SC85, 2008 SB85, 2006 UK, 2005 CN, 2000 KW43, 1998 QE2, 1997 US2
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-S90 -- 2008 SG148
H47Vicksburg Obs. in Mississippi, 1 in MPEC 2008-S85 -- 4257
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 29 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.
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 SE85JPL Sentry21112015-2105293.7e-08-4.18-4.280JPL: "Analysis based on 17 observations spanning .95911 days (2008-Sep-28.44782 to 2008-Sep-29.40693)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2008 SH82JPL Sentry21112032-2106293.0e-07-4.66-5.260JPL: "Analysis based on 18 observations spanning 3.0472 days (2008-Sep-26.21299 to 2008-Sep-29.26018)." Diameter approximately 0.215 km. from mean, weighted H=21.0.
2008 SV11JPL Sentry23582009-2089165.0e-07-1.13-1.130JPL: "Analysis based on 34 observations spanning 4.0310 days (2008-Sep-25.26245 to 2008-Sep-29.2934)." Diameter approximately 0.781 km. from mean, weighted H=18.2.
NEODyS14292009-2085201.05e-06-0.63-0.630NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2008/09/25.263 to 2008/09/28.099."
2008 ST7JPL Sentry14292073-2108623.1e-05-4.34-5.160JPL: "Analysis based on 39 observations spanning 3.9205 days (2008-Sep-24.29993 to 2008-Sep-28.22045)." Diameter approximately 0.053 km. from mean, weighted H=24.0.
NEODyS14292050-2089145.06e-06-5.02-5.410NEODyS: "Based on 42 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/09/28.221."

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 29 September '08

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

2358Noted that JPL Sentry has updated its 2008 SV11 risk assessment - see above
2302Grabbed MPEC 2008-S90 - 2008 SG148 - see above
Grabbed MPEC 2008-S91 - 2008 SH148 - see above
Grabbed MPEC 2008-S92 - 2008 SJ148 - see above
2111Noted that JPL Sentry has posted 2008 SE85 as an impact risk - see above
Noted that JPL Sentry has posted 2008 SH82 as an impact risk - see above
1701Grabbed MPEC 2008-S86 - 2008 SB85 - see above
Grabbed MPEC 2008-S87 - 2008 SC85 - see above
Grabbed MPEC 2008-S88 - 2008 SD85 - see above
Grabbed MPEC 2008-S89 - 2008 SE85 - see above
1429Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above
Noted that NEODyS has updated its 2008 ST7 risk assessment - see above
Noted that NEODyS has updated its 2008 SV11 risk assessment - see above
Grabbed MPEC 2008-S85 - Daily Orbit Update - see above
0429Grabbed MPEC 2008-S84 - 2007 TD66 - see above