2008-10-13 Tracking News

Contents on 13 October '08

IAU Minor Planet Center
- NEOCP Activity -- seven listings: 7 updated
- New MPECs -- one MPEC
Observers -- eight observing facilities
Impact Risk Monitoring -- two objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
Old & new CRT Archive
Old News Archive & Small Objects Archive

The latest A/CC news is available via framed access, 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 13 October '08

The MPC's NEO Confirmation Page has 7 listings: 7 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had seven updated listings. Of these, one was a "one nighter."

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 13 October '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 13 Oct. '08 >> MPEC 2008-T125 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K08T03C 2008 TC3 (small asteroid, arc=1 day, H=30.4 ~3m) from Starkenburg Obs. (Oct. 7.03p3)
K08S82H 2008 SH82 (arc=16 days, H=21.1 ~204m) from Astronomical Research Obs. (ARO) (Oct. 12.04p1)
K08S07T 2008 ST7 (small asteroid, arc=18 days, H=24.1 ~51m) from ARO (Oct. 12.20-22p2)
Observations of recently (no longer) risk-listed objects
K08T25V 2008 TV25 (arc=2 days, H=19.9 ~355m) from Schiaparelli Obs. (Oct. 10.08-09p2)
K08T04C 2008 TC4 (q=0.349 AU, arc=6 days, H=21.4 ~178m) from Great Shefford Obs. (Oct. 13.01-02p3)
K08T02C 2008 TC2 (small asteroid, arc=9 days, H=22.9 ~89m) from ARO (Oct. 12.31-32p3)
Observations of small asteroids (H>22.0)
K08T26T 2008 TT26 (arc=4 days, H=23.7 ~62m) from ARO (Oct. 12.06-07p3) and Great Shefford Obs. (Oct. 12.85-87p4)
K08T04A 2008 TA4 (arc=6 days, H=25.1 ~32m) from ARO (Oct. 12.04-05p4) and Great Shefford Obs. (Oct. 12.91p2)
K08T03X 2008 TX3 (arc=6 days, H=24.9 ~35m) from ARO (Oct. 12.25p2)
Observations of other objects
K08T09K 2008 TK9 (arc=4 days, H=19.8 ~371m) from ARO (Oct. 12.13-14p4)
K08R00T 2008 RT (arc=39 days, H=19.8 ~371m) from Schiaparelli Obs. (Oct. 11.09p3)
K05W55S 2005 WS55 (arc=4 opp, H=16.0 ~2.14 km, q=1.108 AU) from Inastars Obs. (Oct. 12.92p4)
K04X45A 2004 XA45 (arc=4 opp, H=20.9 ~224m) from David Tholen's team on Mauna Kea (Sept. 16.60-61p4 at R=22.8-9)
K03G00Y 2003 GY (arc=4 opp, H=20.1 ~323m) from ARO (Oct. 12.41-45p3 at V=22.1-3)
K01T01W 2001 TW1 (arc=5 opp, H=19.1 ~513m) from Schiaparelli Obs. (Oct. 11.06-07p3)
K00F01L 2000 FL1 (i=43.6°, Q=4.178 AU, arc=2 opp, H=15.3 ~2.95 km, q=1.291 AU) from Schiaparelli Obs. (Oct. 11.12p1 & 11.19p1)
E1079 141079 2001 XS30 from Inastars Obs. (Oct. 12.84-85p4)
53319 53319 1999 JM8 from Atlante Obs. (Oct. 12.13-14p3)
31221 31221 1998 BP26 from Mirasteilas Obs. (Oct. 12.03-06p3)
02201 2201 Oljato (1947 XC) from Atlante Obs. (Oct. 12.19-23p3)
01627 1627 Ivar (1929 SH) from Schiaparelli Obs. (Oct. 11.05-10p3)

Observers on 13 October '08

Eight observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2008-T125 -- 2008 TX3, 2008 TT26, 2008 TK9, 2008 TC2, 2008 TA4, 2008 ST7, 2008 SH82, 2003 GY
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2008-T125 -- 53319, 2201
`J95`	Great Shefford Obs. in England, 3 in MPEC 2008-T125 -- 2008 TT26, 2008 TC4, 2008 TA4
`B15`	Inastars Obs. in Germany, 2 in MPEC 2008-T125 -- 2005 WS55, 141079
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-T125 -- 2004 XA45
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2008-T125 -- 31221
`204`	Schiaparelli Obs. in Italy, 5 in MPEC 2008-T125 -- 2008 TV25, 2008 RT, 2001 TW1, 2000 FL1, 1627
`611`	Starkenburg Obs. in Germany, 1 in MPEC 2008-T125 -- 2008 TC3

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 13 October '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 SH82	JPL Sentry	1542	2081	1	3.8e-08	-5.76	-5.76	0	JPL: "Analysis based on 48 observations spanning 15.824 days (2008-Sep-26.21299 to 2008-Oct-12.03706)." Diameter approximately 0.210 km. from mean, weighted H=21.0.
2008 SH82	NEODyS	1542	2081	1	3.66e-08	-5.81	-5.81	0	NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2008/09/26.214 to 2008/10/12.038."

2008 ST7	JPL Sentry	1542	2073-2108	33	5.1e-05	-4.20	-4.50	0	JPL: "Analysis based on 99 observations spanning 17.915 days (2008-Sep-24.29993 to 2008-Oct-12.21517)." Diameter approximately 0.051 km. from mean, weighted H=24.1.
2008 ST7	NEODyS	1542	2062-2089	13	6.56e-07	-5.93	-6.14	0	NEODyS: "Based on 105 optical observations (of which 6 are rejected as outliers) from 2008/09/24.301 to 2008/10/12.216."

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 13 October '08

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

1542

Noted that JPL Sentry has updated its 2008 SH82 risk assessment - see above
Noted that NEODyS has updated its 2008 SH82 risk assessment - see above
Noted that JPL Sentry has updated its 2008 ST7 risk assessment - see above
Noted that NEODyS has updated its 2008 ST7 risk assessment - see above
Grabbed MPEC 2008-T125 - Daily Orbit Update - see above

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