2009-02-08 Tracking News

Contents on 8 February '09

IAU Minor Planet Center
- NEOCP Activity -- none
- 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 8 February '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were two listings noted earlier today.

New MPECs on 8 February '09

Minor Planet Electronic Circulars

As of last check at 2259 UTC, there has been one MPEC posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 8 Feb. '09 >> MPEC 2009-C64 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09C03C 2009 CC3 (arc=3 days, H=19.0 ~537m) from the Siding Spring Survey (SSS) (Feb. 7.60p1)
K09B71L 2009 BL71 (almost small, arc=8 days, H=22.0 ~135m) from Great Shefford Obs. (Feb. 6.96p2 & 7.04p1)
Observations of small asteroids (H>22.0)
K09C00U 2009 CU (arc=3 days, H=24.3 ~47m) from Astronomical Research Obs. (ARO) (Feb. 5.43-44p4)
K09C00P 2009 CP (arc=5 days, H=26.8 ~15m) from Great Shefford Obs. (Feb. 7.20p2)
K02K03M 2002 KM3 (arc=27 days, H=22.3 ~117m) from NEAT's Mt. Palomar telescope (2002 May 10.29-31p2)
Observations of other objects
K09C03A 2009 CA3 (arc=4 days, H=20.0 ~339m) from Great Shefford Obs. (Feb. 7.82-83p2)
K09C02Z 2009 CZ2 (arc=4 days, H=18.9 ~562m) from Great Shefford Obs. (Feb. 7.77p2)
K09A16F 2009 AF16 (arc=20 days, H=21.2 ~195m) from Schiaparelli Obs. (Jan. 30.06-07p3)
K08Y27R 2008 YR27 (arc=57 days, H=18.1 ~812m) from Schiaparelli Obs. (Jan. 30.10-12p3)
K04K15F 2004 KF15 (arc=66 days, H=20.8 ~234m) from NEAT's USAF Haleakala telescope (2004 May 10.48-50p3)
K02P75O 2002 PO75 (arc=100 days, H=19.1 ~513m) from NEAT/Hawaii (2002 July 22.38-40p3)
J99A10Q 1999 AQ10 (arc=4 opp, H=20.4 ~282m) from Atlante Obs. (Feb. 8.03-04p3)
J98S14Z 1998 SZ14 (arc=55 days, H=19.2 ~490m) from NEAT's GEODSS Haleakala telescope (1998 Nov. 15.50-51p2)
85953 85953 1999 FK21 from SSS (Feb. 7.61-64p4)
68350 68350 2001 MK3 from Atlante Obs. (Feb. 7.99-00p3)
03552 3552 Don Quixote (1983 SA) from SSS (Feb. 7.62-65p3)
01943 1943 Anteros (1973 EC) from SSS (Feb. 7.72-74p4)

Observers on 8 February '09

Eight observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2009-C64 -- 2009 CU
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2009-C64 -- 1999 AQ10, 68350
`J95`	Great Shefford Obs. in England, 4 in MPEC 2009-C64 -- 2009 CZ2, 2009 CP, 2009 CA3, 2009 BL71
`566`	NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2009-C64 -- 1998 SZ14
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-C64 -- 2002 KM3
`608`	NEAT's USAF Haleakala telescope in Hawaii, 2 in MPEC 2009-C64 -- 2004 KF15, 2002 PO75
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2009-C64 -- 2009 AF16, 2008 YR27
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-C64 -- 2009 CC3, 85953, 3552, 1943

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

Impact Risk Monitoring on 8 February '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2259 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 CC3	JPL Sentry	1541	2095-2104	5	3.9e-07	-3.84	-4.22	0	JPL: "Analysis based on 34 observations spanning 2.9723 days (2009-Feb-04.62941 to 2009-Feb-07.60175)." Diameter approximately 0.540 km. from mean, weighted H=19.0.

2009 BL71	JPL Sentry	1541	R E M O V E D						JPL: Risk listing removed at 0955 UTC.

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 8 February '09

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

1541	Noted that JPL Sentry has removed 2009 BL71 as an impact risk - see above Noted that JPL Sentry has updated its 2009 CC3 risk assessment - see above Grabbed MPEC 2009-C64 - Daily Orbit Update - see above Noted that the NEOCP has become empty

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