2009-06-15 Tracking News

Contents on 15 June '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 2 new, 3 updated
- New MPECs -- two MPECs
Observers -- twelve 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 15 June '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. All of these were "one nighters." So far The Tracking News has counted a total of seven 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 15 June '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-L46 time-stamped "06:06 UT" - Daily Orbit Update - see below
MPEC 2009-L47 time-stamped "12:37 UT" - 2009 LQ1

MPEC 2009-L47 - "12:37 UT" - 2009 LQ1

K09L01Q 2009 LQ1 (risk-listed, H=22.2 ~123m) was discovered at 0449 UT on 14 June by the Catalina Sky Survey (CSS), which observed it at June 14.20-29p12. The discovery was confirmed by the Mt. Lemmon Survey (MLS) (June 15.23-24p4).

<< DOU on 15 June '09 >> MPEC 2009-L46 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K09L00S 2009 LS (i=47.2°, arc=2 days, H=17.7 ~977m) from Guidestar Obs. (June 13.92-94p3), Suno Obs. (June 14.02-03p3), and the Spacewatch 1.8m telescope (June 14.26-27p3)
Observations of small asteroids (H>22.0)
K09K01Y 2009 KY1 (arc=26 days, H=23.7 ~62m) from Spacewatch 1.8m (June 14.23-24p2 at V=21.9-22.2)
Observations of almost-small asteroids (21.7<H<=22.0)
K09L00Q 2009 LQ (arc=4 days, H=21.9 ~141m) from McCarthy Obs. (June 15.14-16p3)
Observations of other objects
K09K07M 2009 KM7 (arc=19 days, H=17.9 ~891m) from Spacewatch 1.8m (June 14.42-43p3)
K09K02V 2009 KV2 (arc=25 days, H=19.8 ~371m) from CSS (June 14.28-29p4)
K09J05R 2009 JR5 (arc=30 days, H=20.3 ~295m) from Spacewatch 1.8m (June 14.22-23p3)
K09A00V 2009 AV (i=45.9°, arc=163 days, H=18.0 ~851m) from Spacewatch 1.8m (June 14.44-45p3)
K05M13O 2005 MO13 (arc=2 opp, H=20.7 ~245m) from CSS (June 14.30-32p4)
K04L02C 2004 LC2 (arc=2 opp, H=18.7 ~616m) from CSS (June 14.22-24p4)
K02L38T 2002 LT38 (arc=2 opp, H=20.2 ~309m) from Tentlingen Obs. (June 13.88-95p4)
K02L32S 2002 LS32 (arc=4 opp, H=18.2 ~776m) from CSS (June 14.25-26p4)
J4386 194386 2001 VG5 from CSS (June 14.25-26p4)
E3651 143651 2003 QO104 from Univ. of Narino Obs. (June 3.01-05p5 & 13.06-08p6)
D8911 138911 2001 AE2 from Leura Obs. (June 13.41-43p3)
85774 85774 1998 UT18 from MLS (June 14.24-26p4)
05620 5620 Jasonwheeler (1990 OA) from Bolzaneto Obs. (June 13.87-89p4) and Goodricke-Pigott Obs. (June 14.23-25p3)
04954 4954 Eric (1990 SQ) from Tzec Maun Obs. Pingelly (June 13.49-53p2 & 13.57p1)

Observers on 15 June '09

Twelve observing facilities appear in today's MPECs.

Code	Observer / observatory
`A88`	Bolzaneto Obs. in Italy, 1 in MPEC 2009-L46 -- 5620
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPECs 2009-L46 & 2009-L47 -- 2009 LQ1, 2009 KV2, 2005 MO13, 2004 LC2, 2002 LS32, 194386
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-L46 -- 5620
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2009-L46 -- 2009 LS
`E17`	Leura Obs. in New South Wales, 1 in MPEC 2009-L46 -- 138911
`932`	McCarthy Obs. in Connecticut, 1 in MPEC 2009-L46 -- 2009 LQ
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2009-L46 & 2009-L47 -- 2009 LQ1, 85774
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2009-L46 -- 2009 LS, 2009 KY1, 2009 KM7, 2009 JR5, 2009 AV
`147`	Suno Obs. in Italy, 1 in MPEC 2009-L46 -- 2009 LS
`A16`	Tentlingen Obs. in Switzerland, 1 in MPEC 2009-L46 -- 2002 LT38
`D25`	Tzec Maun Obs. Pingelly in Western Australia, 1 in MPEC 2009-L46 -- 4954
`H78`	Univ. of Narino Obs. in Colombia, 1 in MPEC 2009-L46 -- 143651

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

Impact Risk Monitoring on 15 June '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 LQ1	JPL Sentry	1602	2010-2104	141	5.8e-06	-3.82	-4.39	0	JPL: "Analysis based on 16 observations spanning 1.0399 days (2009-Jun-14.20093 to 2009-Jun-15.24083)." Diameter approximately 0.113 km. from mean, weighted H=22.3.

2009 LS	JPL Sentry	1324	2017-2107	24	1.9e-08	-3.55	-4.10	0	JPL: "Analysis based on 57 observations spanning 1.8776 days (2009-Jun-12.39072 to 2009-Jun-14.26836)." Diameter approximately 1.100 km. from mean, weighted H=17.5.
2009 LS	NEODyS	1324	2017-2085	24	3.22e-08	-3.33	-3.72	0	NEODyS: "Based on 57 optical observations (of which 0 are rejected as outliers) from 2009/06/12.391 to 2009/06/14.269."

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 15 June '09

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

1602	Noted that JPL Sentry has posted 2009 LQ1 as an impact risk - see above
1324	Noted that JPL Sentry has updated its 2009 LS risk assessment - see above Noted that NEODyS has updated its 2009 LS risk assessment - see above Grabbed MPEC 2009-L46 - Daily Orbit Update - see above Grabbed MPEC 2009-L47 - 2009 LQ1 - see above

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