2009-10-02 Tracking News

Contents on 2 October '09

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- three MPECs
Observers -- eleven 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
News image catalog
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 October '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of two 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 October '09

Minor Planet Electronic Circulars

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

MPEC 2009-T02 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2009-T03 time-stamped "10:20 UT" - 2005 SP9 - see below
MPEC 2009-T04 time-stamped "12:10 UT" - 2006 WL3

MPEC 2009-T04 - "12:10 UT" - 2006 WL3

K06W03L 2006 WL3 from Tenagra II Obs. (Sept. 30.43-44p3 & Oct. 2.40-41p3)

MPEC 2009-T03 - "10:20 UT" - 2005 SP9

K05S09P 2005 SP9 from Tenagra II Obs. (Sept. 30.10p3 & Oct. 2.09p2)

<< DOU on 2 Oct. '09 >> MPEC 2009-T02 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09SM9C 2009 SC229 (arc=3 days, H=18.9 ~562m) from Astronomical Research Obs. (ARO) (Oct. 1.28-30p3) and Great Shefford Obs. (Oct. 1.89-92p3)
K09S18G 2009 SG18 (i=58.4°, Q=5.023 AU, arc=10 days, H=17.8 ~933m) from ARO (Oct. 1.05-06p3)
Observations of recently (no longer) risk-listed objects
K09SH1P 2009 SP171 (arc=3 days, H=19.1 ~513m) from ARO (Oct. 1.10-11p4)
K09SA3T 2009 ST103 (Q=4.642 AU, arc=5 days, H=18.0 ~851m) from ARO (Oct. 1.07-08p3)
K09S98O 2009 SO98 (small asteroid, arc=7 days, H=24.3 ~47m) from ARO (Oct. 1.26p4)
K09S00K 2009 SK (small asteroid, Q=4.276 AU, arc=14 days, H=25.1 ~32m) from the Spacewatch 1.8m telescope (Oct. 1.26-27p3)
Observations of small asteroids (H>22.0)
K09SH1W 2009 SW171 (arc=3 days, H=25.9 ~22m) from Spacewatch 1.8m (Oct. 1.24-25p3)
K09SA4L 2009 SL104 (arc=5 days, H=23.4 ~71m) from ARO (Oct. 1.09p3)
K09SA0C 2009 SC100 (arc=6 days, H=23.7 ~62m) from ARO (Oct. 1.17-18p3)
K09SA0B 2009 SB100 (arc=6 days, H=23.5 ~68m) from ARO (Oct. 1.27p5)
K09S17X 2009 SX17 (arc=11 days, H=24.2 ~49m) from the Mt. Lemmon Survey (MLS) (Oct. 2.17-18p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K09R01V 2009 RV1 (Q=4.427 AU, arc=19 days, H=22.0 ~135m) from Spacewatch 1.8m (Oct. 1.28-29p3)
Observations of other objects
K09SA3O 2009 SO103 (arc=6 days, H=17.2 ~1.23 km) from ARO (Oct. 1.19-21p3) and Walnut Creek Obs. (Oct. 1.20-22p3)
K09SA3M 2009 SM103 (Q=4.600 AU, arc=6 days, H=16.9 ~1.41 km) from Castelmartini Obs. (Sept. 30.80p4) and ARO (Oct. 1.03p3)
K09S19T 2009 ST19 (arc=15 days, H=18.5 ~676m) from Nazaret Obs. (Oct. 1.05p1, 1.11-16p3 & 1.22-24p2)
K09S02F 2009 SF2 (arc=13 days, H=20.6 ~257m) from ARO (Oct. 1.30-31p3)
K09S00Q 2009 SQ (q=0.369 AU, Q=4.979 AU, arc=13 days, H=19.0 ~537m) from Modra Obs. (Sept. 29.80-81p2)
K09M09C 2009 MC9 (arc=92 days, H=18.1 ~812m) from Castelmartini Obs. (Sept. 30.83p3)
K04T18B 2004 TB18 (arc=3 opp, H=17.6 ~1.02 km) from Spacewatch 1.8m (Oct. 1.40-41p3)
K04L00J 2004 LJ (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (Oct. 1.49-50p2)
K02F06B 2002 FB6 (arc=5 opp, H=17.6 ~1.02 km) from Castelmartini Obs. (Sept. 30.78p3)
K00CA1O 2000 CO101 (arc=2 opp, H=19.0 ~537m) from Castelmartini Obs. (Sept. 30.78-79p3) and Hamamatsu-Yuto Obs. (Oct. 1.40-42p5)
L7683 217683 1999 RP36 from MLS (Oct. 1.32-34p4)
G2181 162181 1999 LF6 from Castelmartini Obs. (Sept. 30.76p3)
F9402 159402 1999 AP10 from Urseanu Obs. (Sept. 23.91-93p5)
E3624 143624 2003 HM16 from MLS (Oct. 1.34-36p4)
54401 54401 2000 LM from Castelmartini Obs. (Sept. 30.85p3)
17274 17274 2000 LC16 from Castelmartini Obs. (Sept. 30.86-87p3)
16834 16834 1997 WU22 from Castelmartini Obs. (Sept. 30.85-86p3)
12711 12711 Tukmit (1991 BB) from Castelmartini Obs. (Sept. 30.77p3)

Observers on 2 October '09

Eleven observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2009-T02 -- 2009 ST103, 2009 SP171, 2009 SO98, 2009 SO103, 2009 SM103, 2009 SL104, 2009 SG18, 2009 SF2, 2009 SC229, 2009 SC100, 2009 SB100
`160`	Castelmartini Obs. in Italy, 9 in MPEC 2009-T02 -- 2009 SM103, 2009 MC9, 2002 FB6, 2000 CO101, 54401, 17274, 16834, 162181, 12711
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-T02 -- 2009 SC229
`379`	Hamamatsu-Yuto Obs. in Japan, 1 in MPEC 2009-T02 -- 2000 CO101
`118`	Modra Obs. in Slovakia, 1 in MPEC 2009-T02 -- 2009 SQ
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 3 in MPEC 2009-T02 -- 2009 SX17, 217683, 143624
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2009-T02 -- 2009 ST19
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-T02 -- 2009 SW171, 2009 SK, 2009 RV1, 2004 TB18, 2004 LJ
`926`	Tenagra II Obs. in Arizona, 2 in MPECs 2009-T03 & 2009-T04 -- 2006 WL3, 2005 SP9
`A92`	Urseanu Obs. in Romania, 1 in MPEC 2009-T02 -- 159402
`G56`	Walnut Creek Obs. in northern California, 1 in MPEC 2009-T02 -- 2009 SO103

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

Impact Risk Monitoring on 2 October '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 SC229	NEODyS	1521	R E M O V E D						-
2009 SC229	JPL Sentry	1521	R E M O V E D						JPL: Risk listing removed at 0849 UTC.

2009 SG18	NEODyS	1521	R E M O V E D						-

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 October '09

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

1521	Noted that JPL Sentry has removed 2009 SC229 as an impact risk - see above Noted that NEODyS has removed 2009 SC229 as an impact risk - see above Noted that NEODyS has removed 2009 SG18 as an impact risk - see above Grabbed MPEC 2009-T02 - Daily Orbit Update - see above Grabbed MPEC 2009-T03 - 2005 SP9 - see above Grabbed MPEC 2009-T04 - 2006 WL3 - see above
0544	Noted that the NEOCP has become active

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