2009-08-02 Tracking News

Contents on 2 August '09

IAU Minor Planet Center
- NEOCP Activity -- nine listings: 3 new, 6 updated
- New MPECs -- two MPECs
Observers -- fifteen observing facilities
Impact Risk Monitoring -- one object
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 2 August '09

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had three new and six updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of ten listings on the NEOCP at some point today.

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

New MPECs on 2 August '09

Minor Planet Electronic Circulars

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

MPEC 2009-P04 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2009-P05 time-stamped "15:11 UT" - 2007 RQ17

MPEC 2009-P05 - "15:11 UT" - 2007 RQ17

K07R17Q 2007 RQ17 from the Siding Spring Survey (SSS) (Aug. 1.37p2 & 2.37p3)

<< DOU on 2 Aug. '09 >> MPEC 2009-P04 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K09O06W 2009 OW6 (small asteroid, arc=5 days, H=25.3 ~29m) from the Spacewatch 1.8m telescope (Aug. 1.35-36p3) and David Tholen's team on Mauna Kea (Aug. 1.55p3)
Observations of other objects
K09O09O 2009 OO9 (q=0.291 AU, arc=1 day, H=18.9 ~562m) from Alianza S4 Obs. (July 30.40p3)
K09O00C 2009 OC (arc=2 opp, H=20.4 ~282m) from Castelmartini Obs. (Aug. 1.94-95p3)
K09N00L 2009 NL (Q=4.757 AU, arc=20 days, H=19.8 ~371m) from Great Shefford Obs. (July 30.06-12p4) and Castelmartini Obs. (Aug. 1.96p3)
K09N00H 2009 NH (arc=22 days, H=18.8 ~589m) from Castelmartini Obs. (Aug. 1.96p3) and Atlante Obs. (Aug. 2.02-03p3)
K09N00E 2009 NE (q=0.361 AU, Q=4.987 AU, arc=4 opp, H=15.9 ~2.24 km) from Eschenberg Obs. (Aug. 1.84p3) and Atlante Obs. (Aug. 1.92-94p3)
K09M09C 2009 MC9 (arc=33 days, H=17.9 ~891m) from El Condor Obs. (Aug. 2.03-07p2 & 2.13p1)
K09M06X 2009 MX6 (arc=38 days, H=19.2 ~490m) from Castelmartini Obs. (Aug. 1.86-87p3)
K09L00X 2009 LX (Q=4.542 AU, arc=51 days, H=19.5 ~426m) from LINEAR (Aug. 1.33-38p8)
K09H77V 2009 HV77 (arc=104 days, H=20.7 ~245m) from El Condor Obs. (Aug. 2.17-19p2)
K08O02X 2008 OX2 (arc=2 opp, H=20.1 ~323m) from Tholen team/Mauna Kea (June 22.57-58p3 & July 2.52p3)
K05VB8P 2005 VP118 (arc=4 opp, H=18.8 ~589m) from Tholen team/Mauna Kea (July 5.61p1 at R=23.3)
K05T45U 2005 TU45 (arc=4 opp, H=17.1 ~1.29 km) from Tholen team/Mauna Kea (July 2.61p1 at R=22.4)
K05S25N 2005 SN25 (arc=4 opp, H=19.7 ~389m) from program code 5 via Faulkes Telescope North (July 29.50p2) and Eschenberg Obs. (Aug. 1.91-92p7)
K04K15F 2004 KF15 (arc=2 opp, H=20.8 ~234m) from Spacewatch 1.8m (Aug. 1.23-29p3)
K02N01P 2002 NP1 (arc=3 opp, H=17.6 ~1.02 km) from Faulkes North/code 5 (July 29.49p2)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Atlante Obs. (Aug. 1.89-90p3) and Thompsonville Obs. (Aug. 2.14-15p6)
K01A50A 2001 AA50 (i=43.9°, arc=4 opp, H=18.5 ~676m) from Great Shefford Obs. (July 29.94p1, 29.99p1 & 30.07-11p2)
G3051 163051 2001 YJ4 from Eschenberg Obs. (Aug. 1.93-94p3)
G1989 161989 Cacus (1978 CA) from the Spacewatch 0.9m telescope (Aug. 1.45-47p3)
F3591 153591 2001 SN263 from Spacewatch 0.9m (July 31.38-42p2)
24761 24761 Ahau (1993 BW2) from SSS (Aug. 1.56-59p4) and El Condor Obs. (Aug. 2.10p1 & 2.18p1)
20826 20826 2000 UV13 from SSS (Aug. 1.73-76p4)
17511 17511 1992 QN from LINEAR (Aug. 1.39-43p4)
17274 17274 2000 LC16 from Mt. Tuffley Obs. (Aug. 1.00p3) and El Condor Obs. (Aug. 2.08p1 & 2.15p1)
11500 11500 Tomaiyowit (1989 UR) from Eschenberg Obs. (Aug. 1.89-90p5)
05626 5626 1991 FE from El Condor Obs. (Aug. 2.09p1 & 2.16p1)
04034 4034 1986 PA from the Catalina Sky Survey (CSS) (Aug. 1.34-36p4)
01943 1943 Anteros (1973 EC) from Atlante Obs. (Aug. 2.05-07p3)
00433 433 Eros (1898 DQ) from LINEAR (Aug. 1.33-35p3), Mt. Tuffley Obs. (Aug. 1.98-99p3), and Thompsonville Obs. (Aug. 2.17-18p6)

Observers on 2 August '09

Fifteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`I08`	Alianza S4 Obs. in Argentina, 1 in MPEC 2009-P04 -- 2009 OO9
`J51`	Atlante Obs. in the Canary Islands, 4 in MPEC 2009-P04 -- 2009 NH, 2009 NE, 2002 LV, 1943
`160`	Castelmartini Obs. in Italy, 4 in MPEC 2009-P04 -- 2009 OC, 2009 NL, 2009 NH, 2009 MX6
`703`	Catalina Sky Survey in Arizona, 1 in MPEC 2009-P04 -- 4034
`I21`	El Condor Obs. in Argentina, 5 in MPEC 2009-P04 -- 2009 MC9, 2009 HV77, 24761, 17274, 5626
`151`	Eschenberg Obs. in Switzerland, 4 in MPEC 2009-P04 -- 2009 NE, 2005 SN25, 163051, 11500
`F655`	program code 5 via Faulkes Telescope North in Hawaii, 2 in MPEC 2009-P04 -- 2005 SN25, 2002 NP1
`J95`	Great Shefford Obs. in England, 2 in MPEC 2009-P04 -- 2009 NL, 2001 AA50
`704`	LINEAR in New Mexico, 3 in MPEC 2009-P04 -- 2009 LX, 17511, 433
`5682`	David Tholen's team on Mauna Kea in Hawaii, 4 in MPEC 2009-P04 -- 2009 OW6, 2008 OX2, 2005 VP118, 2005 TU45
`J93`	Mt. Tuffley Obs. in England, 2 in MPEC 2009-P04 -- 17274, 433
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPECs 2009-P04 & 2009-P05 -- 2007 RQ17, 24761, 20826
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-P04 -- 161989, 153591
`291`	Spacewatch 1.8m telescope in Arizona, 2 in MPEC 2009-P04 -- 2009 OW6, 2004 KF15
`H53`	Thompsonville Obs. in Illinois, 2 in MPEC 2009-P04 -- 2002 LV, 433

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

Impact Risk Monitoring on 2 August '09

**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.
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 OW6	JPL Sentry	1434	2080	1	4.7e-06	-5.77	-5.77	0	JPL: "Analysis based on 51 observations spanning 5.1894 days (2009-Jul-27.36058 to 2009-Aug-01.550023)." Diameter approximately 0.030 km. from mean, weighted H=25.3.
2009 OW6	NEODyS	1434	2080	1	8.25e-06	-5.52	-5.52	0	NEODyS: "Based on 52 optical observations (of which 2 are rejected as outliers) from 2009/07/27.361 to 2009/08/01.551."

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 2 August '09

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

1727	Grabbed MPEC 2009-P05 - 2007 RQ17 - see above
1434	Noted that JPL Sentry has updated its 2009 OW6 risk assessment - see above Noted that NEODyS has updated its 2009 OW6 risk assessment - see above Grabbed MPEC 2009-P04 - Daily Orbit Update - see above

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