2009-07-23 Tracking News

Contents on 23 July '09

IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- one MPEC
Observers -- ten 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 23 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. 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 23 July '09

Minor Planet Electronic Circulars

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

<< DOU on 23 July '09 >> MPEC 2009-O26 - "06:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09O00F 2009 OF (arc=6 days, H=21.3 ~186m) from Zonalunar Obs. (July 21.91p1) and Great Shefford Obs. (July 22.92-93p3)
Observations of recently (no longer) risk-listed objects
K09N00A 2009 NA (Q=4.153 AU, arc=20 days, H=17.4 ~1.12 km) from Schiaparelli Obs. (July 20.98-99p4) and Lumezzane Obs. (July 21.05p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K06T07U 2006 TU7 (arc=2 opp, H=21.9 ~141m) from the Siding Spring Survey (SSS) (July 22.71-73p3 & 22.83p1)
Observations of other objects
K09N00L 2009 NL (Q=4.745 AU, arc=9 days, H=19.9 ~355m) from Petit Jean Mtn. South Obs. (PJMSO) (July 22.28-29p7)
K09N00J 2009 NJ (arc=10 days, H=18.5 ~676m) from Lumezzane Obs. (July 20.85p4)
K09N00H 2009 NH (arc=11 days, H=18.8 ~589m) from PJMSO (July 22.26-27p6)
K09N00E 2009 NE (q=0.361 AU, Q=4.987 AU, arc=4 opp, H=15.8 ~2.34 km) from PJMSO (July 22.22p6)
K09K22J 2009 KJ22 (arc=52 days, H=19.9 ~355m) from the Catalina Sky Survey (CSS) (July 22.28-29p3) and PJMSO (July 22.29-30p6)
K09K07C 2009 KC7 (Q=4.055 AU, arc=55 days, H=19.4 ~446m) from Astronomical Research Obs. (ARO) (July 21.11-12p3)
K09K05D 2009 KD5 (arc=58 days, H=18.2 ~776m) from SSS (July 22.78p2)
K08W60L 2008 WL60 (arc=195 days, H=18.0 ~851m) from Bornheim Obs. (April 19.86-88p3, 21.86-88p3 & 22.84-87p4)
K05S25N 2005 SN25 (arc=4 opp, H=19.7 ~389m) from Lumezzane Obs. (July 20.99-00p3)
K05M00C 2005 MC (Q=4.169 AU, arc=3 opp, H=16.3 ~1.86 km) from PJMSO (July 22.30p5)
K04V15A 2004 VA15 (Q=4.606 AU, arc=2 opp, H=18.5 ~676m) from SSS (July 22.80p1)
K02Y05Q 2002 YQ5 (arc=3 opp, H=19.7 ~389m) from Schiaparelli Obs. (July 20.95p1) and Lumezzane Obs. (July 20.97-98p3)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Bornheim Obs. (July 15.90-91p4 & 16.89-91p4), Lumezzane Obs. (July 20.94-95p4), and PJMSO (July 22.21-22p6)
G3758 163758 2003 OS13 from Lumezzane Obs. (July 20.94p4)
G3051 163051 2001 YJ4 from Lumezzane Obs. (July 21.03-04p4)
G2483 162483 2000 PJ5 from CSS (July 22.19-20p4)
54401 54401 2000 LM from Lumezzane Obs. (July 21.02-03p4)
15745 15745 1991 PM5 from Bornheim Obs. (June 22.93-94p3, 24.91-93p4 & July 15.87-89p3) and Lumezzane Obs. (July 20.95p4)
11500 11500 Tomaiyowit (1989 UR) from Bootes Obs. (July 22.93p1 & 22.97p1)
09162 9162 Kwiila (1987 OA) from Bootes Obs. (July 22.91-92p3)
08035 8035 1992 TB from Lumezzane Obs. (July 21.06-07p4)
05693 5693 1993 EA from Bornheim Obs. (April 19.89-90p3, 21.89-91p4 & 22.87-90p4)
05011 5011 Ptah (6743 P-L) from Bornheim Obs. (April 19.84-85p4)

Observers on 23 July '09

Ten observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2009-O26 -- 2009 KC7
`J05`	Bootes Obs., 2 in MPEC 2009-O26 -- 11500, 9162
`127`	Bornheim Obs. in Germany, 5 in MPEC 2009-O26 -- 2008 WL60, 2002 LV, 15745, 5693, 5011
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-O26 -- 2009 KJ22, 162483
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-O26 -- 2009 OF
`130`	Lumezzane Obs. in Italy, 10 in MPEC 2009-O26 -- 2009 NJ, 2009 NA, 2005 SN25, 2002 YQ5, 2002 LV, 54401, 163758, 163051, 15745, 8035
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 6 in MPEC 2009-O26 -- 2009 NL, 2009 NH, 2009 NE, 2009 KJ22, 2005 MC, 2002 LV
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2009-O26 -- 2009 NA, 2002 YQ5
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-O26 -- 2009 KD5, 2006 TU7, 2004 VA15
`J08`	Zonalunar Obs. in Spain, 1 in MPEC 2009-O26 -- 2009 OF

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

Impact Risk Monitoring on 23 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 OF	JPL Sentry	1300	2039	1	1.8e-06	-3.72	-3.72	0	JPL: "Analysis based on 71 observations spanning 5.7140 days (2009-Jul-17.21281 to 2009-Jul-22.92683)." Diameter approximately 0.190 km. from mean, weighted H=21.3.
2009 OF	NEODyS	1300	2039	1	2.31e-06	-3.62	-3.62	0	NEODyS: "Based on 71 optical observations (of which 1 are rejected as outliers) from 2009/07/17.214 to 2009/07/22.928."

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 23 July '09

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

1300	Noted that JPL Sentry has updated its 2009 OF risk assessment - see above Noted that NEODyS has updated its 2009 OF risk assessment - see above Grabbed MPEC 2009-O26 - Daily Orbit Update - see above

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