2009-06-04 Tracking News

Contents on 4 June '09

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- one MPEC
Observers -- thirteen 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 4 June '09

Not active

The Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) was empty when checked at 2359 UTC, but earlier one listing was noted.

New MPECs on 4 June '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there was one MPEC posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 4 June '09 >> MPEC 2009-L19 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09H00C 2009 HC (small asteroid, arc=45 days, H=24.7 ~39m) from Astronomical Research Obs. (ARO) (June 1.12-13p2 at V=21.8-22.2)
Observations of recently (no longer) risk-listed objects
K09K02L 2009 KL2 (arc=14 days, H=18.1 ~812m) from ARO (June 1.28-30p4) and Tenagra II Obs. (June 3.32-34p3)
Observations of small asteroids (H>22.0)
K09L00E 2009 LE (arc=2 days, H=23.7 ~62m) from Desert Moon Obs. (June 3.28-33p3) and Great Shefford Obs. (June 4.08-09p3)
K09L00D 2009 LD (arc=2 days, H=26.2 ~19m) from Great Shefford Obs. (June 4.07p3)
K09H00G 2009 HG (arc=45 days, H=24.5 ~43m) from ARO (June 1.32p2)
Observations of other objects
K09K22J 2009 KJ22 (arc=3 days, H=20.1 ~323m) from Rio Cuarto Obs. (June 3.22-24p3) and Alianza S4 Obs. (June 3.33p3)
K09J02M 2009 JM2 (arc=22 days, H=19.4 ~446m) from Rio Cuarto Obs. (June 3.07-08p3)
K09F28N 2009 FN28 (Q=4.001 AU, arc=68 days, H=19.3 ~467m) from ARO (May 31.31-32p2)
K09E02Q 2009 EQ2 (arc=88 days, H=20.7 ~245m) from Desert Moon Obs. (June 3.22-25p3)
K09D01L 2009 DL1 (arc=103 days, H=19.0 ~537m) from El Leoncito Obs. (May 31.19-20p2 & June 2.14-15p3)
K08W64M 2008 WM64 (arc=190 days, H=20.6 ~257m) from Cima Rest Obs. (June 1.99-00p3)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Skylive Obs. (June 2.98-00p2) and McCarthy Obs. (June 3.27p3)
F9399 159399 1998 UL1 from Castelmartini Obs. (June 2.87-88p5)
E2781 142781 2002 UM11 from Rio Cuarto Obs. (June 3.11-12p2)
D8883 138883 2000 YL29 from Castelmartini Obs. (June 2.85p3)
D6617 136617 1994 CC from El Leoncito Obs. (May 31.08-09p4, June 1.03-04p4 & 2.02-04p3)
85989 85989 1999 JD6 from North Obs. (June 1.97-98p3), Castelmartini Obs. (June 2.95-96p3), and McCarthy Obs. (June 3.28-29p3)
54690 54690 2001 EB from the Mt. Lemmon Survey (MLS) (June 3.17-19p4)
54401 54401 2000 LM from Desert Moon Obs. (June 3.35-36p3)
35396 35396 1997 XF11 from Rio Cuarto Obs. (June 3.03-05p3)
17274 17274 2000 LC16 from El Leoncito Obs. (May 31.29-31p3 & June 2.23-25p3)
15745 15745 1991 PM5 from Castelmartini Obs. (June 2.97p2)
14402 14402 1991 DB from Castelmartini Obs. (June 2.98-99p3)
09950 9950 ESA (1990 VB) from El Leoncito Obs. (May 31.28p1, June 1.25-26p2 & 2.20-22p3)
03552 3552 Don Quixote (1983 SA) from El Leoncito Obs. (May 31.99-01p4 & June 2.01-02p4)

Observers on 4 June '09

Thirteen observing facilities appeared in this day's MPEC.

Code	Observer / observatory
`I08`	Alianza S4 Obs. in Argentina, 1 in MPEC 2009-L19 -- 2009 KJ22
`H55`	Astronomical Research Obs. (ARO) in Illinois, 4 in MPEC 2009-L19 -- 2009 KL2, 2009 HG, 2009 HC, 2009 FN28
`160`	Castelmartini Obs. in Italy, 5 in MPEC 2009-L19 -- 85989, 159399, 15745, 14402, 138883
`B11`	Cima Rest Obs. in Italy, 1 in MPEC 2009-L19 -- 2008 WM64
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2009-L19 -- 2009 LE, 2009 EQ2, 54401
`808`	El Leoncito Obs. in Argentina, 5 in MPEC 2009-L19 -- 2009 DL1, 17274, 136617, 9950, 3552
`J95`	Great Shefford Obs. in England, 2 in MPEC 2009-L19 -- 2009 LE, 2009 LD
`932`	McCarthy Obs. in Connecticut, 2 in MPEC 2009-L19 -- 2002 LV, 85989
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-L19 -- 54690
`J69`	North Obs. in England, 1 in MPEC 2009-L19 -- 85989
`I20`	Rio Cuarto Obs. in Argentina, 4 in MPEC 2009-L19 -- 2009 KJ22, 2009 JM2, 35396, 142781
`B40`	Skylive Obs. in Italy, 1 in MPEC 2009-L19 -- 2002 LV
`926`	Tenagra II Obs. in Arizona, 1 in MPEC 2009-L19 -- 2009 KL2

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

Impact Risk Monitoring on 4 June '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2205 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 HC	JPL Sentry	1333	2095-2099	2	1.2e-06	-6.26	-6.28	0	JPL: "Analysis based on 148 observations spanning 44.903 days (2009-Apr-17.23164 to 2009-Jun-01.13477)." Diameter approximately 0.038 km. from mean, weighted H=24.8.

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 4 June '09

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

1435	Noted that the NEOCP has become empty
1333	Noted that JPL Sentry has updated its 2009 HC risk assessment - see above Grabbed MPEC 2009-L19 - Daily Orbit Update - see above Noted that the NEOCP has become active

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