2009-07-31 Tracking News

Contents on 31 July '09

IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- two MPECs
Observers -- 26 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 31 July '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." So far The Tracking News has counted a total of three 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 31 July '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-O55 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2009-O56 time-stamped "15:29 UT" - Comet C/2009 O4 (Hill)

MPEC 2009-O56 - "15:29 UT" - Comet C/2009 O4 (Hill)

CK09O040 C/2009 O4 from the Catalina Sky Survey (CSS) (July 30.37-39p4 & 30.45p4), Moriyama Obs. (July 30.70-71p4 & 30.77-78p2), RAS Obs. Moorook (July 30.73-76p6 & 30.84p4), Wildberg Obs. (July 30.94-96p5), Vitebsk Obs. (July 30.96-97p3), Zvezdno Obshtestvo Obs. (July 30.97-99p3), Taunus Obs. (July 30.97-99p12), Guidestar Obs. (July 30.97-99p4), Vallemare di Borbona Obs. (July 31.05-07p4), Atlante Obs. (July 31.07-10p3), Doc Greiner Research Obs. (DGRO) (July 31.21-22p4), Sabino Canyon Obs. (July 31.32-33p4), Magdalena Ridge Obs. (MRO) (July 31.35-38p5), and Sandlot Obs. (July 31.39-40p3)

<< DOU on 31 July '09 >> MPEC 2009-O55 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K09O06W 2009 OW6 (small asteroid, arc=3 days, H=25.2 ~31m) from the Spacewatch 1.8m telescope (July 30.47-48p3)
Observations of recently (no longer) risk-listed objects
K09O00F 2009 OF (arc=13 days, H=21.5 ~170m) from Astronomical Research Obs. (ARO) (July 28.09-10p5)
Observations of small asteroids (H>22.0)
K09O05S 2009 OS5 (arc=9 days, H=23.7 ~62m) from Schiaparelli Obs. (July 30.04p1) and Gissar Obs. (July 30.94-97p3)
K09O03C 2009 OC3 (arc=7 days, H=22.2 ~123m) from ARO (July 30.27-28p3)
Observations of other objects
K09O09P 2009 OP9 (arc=1 day, H=19.5 ~426m) from ARO (July 30.29-30p3)
K09O04Z 2009 OZ4 (i=38.4°, Q=4.570 AU, arc=5 days, H=19.1 ~513m) from ARO (July 28.27p4 & 30.17-18p5), La Sagra Obs. (July 28.98-01p3), and Stia Obs. (July 29.87-88p4)
K09O00G 2009 OG (i=48.3°, q=0.382 AU, Q=5.031 AU, arc=13 days, H=16.1 ~2.04 km) from the Siding Spring Survey (SSS) (July 30.70p2)
K09O00C 2009 OC (arc=2 opp, H=20.4 ~282m) from Stia Obs. (July 28.84-85p2)
K09N00L 2009 NL (Q=4.759 AU, arc=17 days, H=19.9 ~355m) from La Sagra Obs. (July 29.05-08p3) and ARO (July 30.19-20p5)
K09N00J 2009 NJ (arc=18 days, H=18.6 ~645m) from ARO (July 30.10-11p4)
K09N00H 2009 NH (arc=19 days, H=18.8 ~589m) from ARO (July 30.21-23p5)
K09M09C 2009 MC9 (arc=30 days, H=17.9 ~891m) from SSS (July 30.69-70p2)
K09M06X 2009 MX6 (arc=36 days, H=19.2 ~490m) from ARO (July 30.12-13p4)
K09M00S 2009 MS (i=52.4°, arc=41 days, H=16.0 ~2.14 km, q=0.864 AU) from the Spacewatch 0.9m telescope (July 30.19-21p2)
K09L00X 2009 LX (Q=4.543 AU, arc=48 days, H=19.6 ~407m) from Schiaparelli Obs. (July 30.02p3 & 30.06-07p2)
K09H82B 2009 HB82 (Q=4.414 AU, arc=98 days, H=17.8 ~933m) from CSS (July 30.37-39p4)
K05C25W 2005 CW25 (arc=5 opp, H=18.6 ~645m) from Schiaparelli Obs. (July 29.89-93p3)
K02N01P 2002 NP1 (arc=3 opp, H=17.6 ~1.02 km) from Schiaparelli Obs. (July 29.96p3 & 30.01p2) and CSS (July 30.27-29p4)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from CSS (July 30.22-24p4), Hamamatsu-Yuto Obs. (July 30.47-51p12), Bigmuskie Obs. (July 30.84p3), and Atlante Obs. (July 30.91-92p3)
G3902 163902 2003 SW222 from CSS (July 29.24-25p3) and Spacewatch 0.9m (July 30.21-23p2)
G2483 162483 2000 PJ5 from CSS (July 30.20-21p3)
G1989 161989 Cacus (1978 CA) from CSS (July 30.43-44p3)
D8883 138883 2000 YL29 from Stia Obs. (July 29.84-85p4)
A5140 105140 2000 NL10 from LINEAR (July 30.38-42p5)
54401 54401 2000 LM from LINEAR (July 30.33-37p4)
52750 52750 1998 KK17 from CSS (July 29.34-35p4)
24761 24761 Ahau (1993 BW2) from CSS (July 30.30-32p4)
24445 24445 2000 PM8 from Spacewatch 0.9m (July 30.17-21p3)
16834 16834 1997 WU22 from Alicante Obs. (July 29.97-98p3)
09162 9162 Kwiila (1987 OA) from Alicante Obs. (July 29.94-95p3)
06239 6239 Minos (1989 QF) from Spacewatch 0.9m (July 30.46-47p2)
05626 5626 1991 FE from Alicante Obs. (July 28.97-98p3)
04034 4034 1986 PA from CSS (July 30.45p4)

Observers on 31 July '09

A total of 26 observing facilities appear in today's MPECs.

Code	Observer / observatory
`J10`	Alicante Obs. in Spain, 3 in MPEC 2009-O55 -- 16834, 9162, 5626
`H55`	Astronomical Research Obs. (ARO) in Illinois, 8 in MPEC 2009-O55 -- 2009 OZ4, 2009 OP9, 2009 OF, 2009 OC3, 2009 NL, 2009 NJ, 2009 NH, 2009 MX6
`J51`	Atlante Obs. in the Canary Islands, 2 in MPECs 2009-O55 & 2009-O56 -- C/2009 O4, 2002 LV
`B88`	Bigmuskie Obs. in Italy, 1 in MPEC 2009-O55 -- 2002 LV
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2009-O55 & 2009-O56 -- C/2009 O4, 2009 HB82, 2002 NP1, 2002 LV, 52750, 24761, 163902, 162483, 161989, 4034
`H26`	Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-O56 -- C/2009 O4
`190`	Gissar Obs. in Tajikistan, 1 in MPEC 2009-O55 -- 2009 OS5
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2009-O56 -- C/2009 O4
`379`	Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-O55 -- 2002 LV
`704`	LINEAR in New Mexico, 2 in MPEC 2009-O55 -- 54401, 105140
`J75`	La Sagra Obs. in Spain, 2 in MPEC 2009-O55 -- 2009 OZ4, 2009 NL
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-O56 -- C/2009 O4
`900`	Moriyama Obs. in Japan, 1 in MPEC 2009-O56 -- C/2009 O4
`D90`	RAS Obs. Moorook in South Australia, 1 in MPEC 2009-O56 -- C/2009 O4
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-O56 -- C/2009 O4
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2009-O56 -- C/2009 O4
`204`	Schiaparelli Obs. in Italy, 4 in MPEC 2009-O55 -- 2009 OS5, 2009 LX, 2005 CW25, 2002 NP1
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2009-O55 -- 2009 OG, 2009 MC9
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-O55 -- 2009 MS, 24445, 163902, 6239
`291`	Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-O55 -- 2009 OW6
`A78`	Stia Obs. in Italy, 3 in MPEC 2009-O55 -- 2009 OZ4, 2009 OC, 138883
`B01`	Taunus Obs. in Germany, 1 in MPEC 2009-O56 -- C/2009 O4
`A55`	Vallemare di Borbona Obs. in Italy, 1 in MPEC 2009-O56 -- C/2009 O4
`B42`	Vitebsk Obs. in Belarus, 1 in MPEC 2009-O56 -- C/2009 O4
`198`	Wildberg Obs. in Germany, 1 in MPEC 2009-O56 -- C/2009 O4
`A79`	Zvezdno Obshtestvo Obs. in Bulgaria, 1 in MPEC 2009-O56 -- C/2009 O4

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

Impact Risk Monitoring on 31 July '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	1309	2080	1	7.1e-06	-5.57	-5.57	0	JPL: "Analysis based on 34 observations spanning 3.1179 days (2009-Jul-27.36058 to 2009-Jul-30.47853)." Diameter approximately 0.030 km. from mean, weighted H=25.2.
2009 OW6	NEODyS	1309	2074-2080	3	7.42e-06	-5.55	-5.58	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/07/27.361 to 2009/07/30.479."

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 31 July '09

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

2109	Grabbed MPEC 2009-O56 - Comet C/2009 O4 (Hill) - see above
1309	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-O55 - Daily Orbit Update - see above

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