2009-04-06 Tracking News

Contents on 6 April '09

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- two MPECs
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 6 April '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.

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 6 April '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-G18 time-stamped "04:06 UT" - 2008 JV19 - see below
MPEC 2009-G19 time-stamped "06:12 UT" - Daily Orbit Update

<< DOU on 6 Apr. '09 >> MPEC 2009-G19 - "06:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K09F00J 2009 FJ (small asteroid, arc=19 days, H=24.9 ~35m) from the Spacewatch 1.8m telescope (April 5.27-29p3)
Observations of recently (no longer) risk-listed objects
K09F30J 2009 FJ30 (small asteroid, arc=8 days, H=22.5 ~107m) from Astronomical Research Obs. (ARO) (April 4.29-31p3)
K09F04S 2009 FS4 (small asteroid, arc=18 days, H=25.2 ~31m) from Calar Alto Obs. (April 6.11p2)
Observations of small asteroids (H>22.0)
K09F04W 2009 FW4 (arc=13 days, H=24.6 ~41m) from Bisei Spaceguard Center (March 25.66-68p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09F32N 2009 FN32 (arc=7 days, H=22.0 ~135m) from ARO (April 4.36-37p3)
Observations of other objects
K09F29Y 2009 FY29 (arc=10 days, H=19.9 ~355m) from ARO (April 4.37-38p3)
K09F28P 2009 FP28 (arc=10 days, H=20.7 ~245m) from Los Campitos Obs. (April 5.03-04p2)
K09D47E 2009 DE47 (arc=35 days, H=18.7 ~616m) from ARO (April 4.38-39p3)
K09D46L 2009 DL46 (arc=35 days, H=21.6 ~162m) from ARO (April 4.41-42p3)
K09D36R 2009 DR36 (arc=39 days, H=20.6 ~257m) from ARO (April 4.25-27p3)
K09D09G 2009 DG9 (Q=4.670 AU, arc=42 days, H=21.0 ~214m) from ARO (April 4.33-35p3)
K09D01L 2009 DL1 (arc=44 days, H=18.9 ~562m) from ARO (April 4.42p3)
K09B81E 2009 BE81 (arc=63 days, H=21.0 ~214m) from ARO (April 4.07-12p3 at V=22.1-5)
K08Y02K 2008 YK2 (arc=105 days, H=19.6 ~407m) from ARO (April 4.38-40p3)
K08W60L 2008 WL60 (arc=133 days, H=18.0 ~851m) from LINEAR (April 5.31-36p5) and Naef Obs. (April 5.85-88p4)
K08W02N 2008 WN2 (arc=163 days, H=20.8 ~234m) from Grove Creek Obs. (April 5.57p3)
K08S11V 2008 SV11 (Q=4.511 AU, arc=2 opp, H=18.4 ~708m) from Bisei (March 31.46-47p5), Hamamatsu-Yuto Obs. (April 5.49-50p9 & 5.57-58p2), and El Condor Obs. (April 6.08p1 & 6.13p1)
K07B02T 2007 BT2 (arc=3 opp, H=17.2 ~1.23 km) from Hamamatsu-Yuto Obs. (April 5.54-55p3)
K04V00C 2004 VC (i=39.1°, arc=3 opp, H=18.8 ~589m) from Schiaparelli Obs. (April 6.13-14p3)
K03W87W 2003 WW87 (i=47.0°, Q=4.082 AU, arc=3 opp, H=17.0 ~1.35 km) from ARO (April 4.22-28p3 at V=22.5-7)
J99Y00A 1999 YA (i=38.2°, arc=4 opp, H=18.2 ~776m) from ARO (April 4.14-19p3 at V=22.3-5)
K8617 208617 2002 EB3 from El Condor Obs. (April 6.10-12p3)
J8856 198856 2005 LR3 from LINEAR (April 5.31-36p5) and Naef Obs. (April 5.86-88p2)
D8883 138883 2000 YL29 from the Catalina Sky Survey (CSS) (April 3.37-39p8)
90367 90367 2003 LC5 from CSS (April 3.37-39p4)
86666 86666 2000 FL10 from CSS (April 3.37-39p4)
85275 85275 1994 LY from CSS (April 3.17-18p4)
52768 52768 1998 OR2 from Grove Creek Obs. (April 5.78-79p6)
14402 14402 1991 DB from LINEAR (April 5.38-43p5)
07822 7822 1991 CS from Bergen-Enkheim Obs. (April 2.97-08p7 & 3.13p1)
03102 3102 Krok (1981 QA) from CSS (April 3.24-26p4)

MPEC 2009-G18 - "04:06 UT" - 2008 JV19

K08J19V 2008 JV19 (H=20.7 ~245m) from Calar Alto Obs. (April 5.14p3 & 6.10p3), Naef Obs. (April 5.91p1 & 5.97p1), and Schiaparelli Obs. (April 6.12p2)

Observers on 6 April '09

Thirteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2009-G19 -- 2009 FY29, 2009 FN32, 2009 FJ30, 2009 DR36, 2009 DL46, 2009 DL1, 2009 DG9, 2009 DE47, 2009 BE81, 2008 YK2, 2003 WW87, 1999 YA
`A74`	Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-G19 -- 7822
`300`	Bisei Spaceguard Center in Japan, 2 in MPEC 2009-G19 -- 2009 FW4, 2008 SV11
`493`	Calar Alto Obs. in Spain, 2 in MPECs 2009-G18 & 2009-G19 -- 2009 FS4, 2008 JV19
`703`	Catalina Sky Survey (CSS) in Arizona, 5 in MPEC 2009-G19 -- 90367, 86666, 85275, 138883, 3102
`I21`	El Condor Obs. in Argentina, 2 in MPEC 2009-G19 -- 2008 SV11, 208617
`E16`	Grove Creek Obs. in New South Wales, 2 in MPEC 2009-G19 -- 2008 WN2, 52768
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2009-G19 -- 2008 SV11, 2007 BT2
`704`	LINEAR in New Mexico, 3 in MPEC 2009-G19 -- 2008 WL60, 198856, 14402
`I36`	Los Campitos Obs. in Argentina, 1 in MPEC 2009-G19 -- 2009 FP28
`A13`	Naef Obs. in Switzerland, 3 in MPECs 2009-G18 & 2009-G19 -- 2008 WL60, 2008 JV19, 198856
`204`	Schiaparelli Obs. in Italy, 2 in MPECs 2009-G18 & 2009-G19 -- 2008 JV19, 2004 VC
`291`	Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2009-G19 -- 2009 FJ

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

Impact Risk Monitoring on 6 April '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: JPL at 2313 and NEODyS 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 FJ	JPL Sentry	1327	2058-2107	9	4.2e-05	-4.40	-4.43	0	JPL: "Analysis based on 119 observations spanning 18.983 days (2009-Mar-17.30916 to 2009-Apr-05.2917)." Diameter approximately 0.036 km. from mean, weighted H=24.9.
2009 FJ	NEODyS	1327	2058-2088	7	4.09e-05	-4.41	-4.43	0	NEODyS: "Based on 126 optical observations (of which 7 are rejected as outliers) from 2009/03/17.245 to 2009/04/05.292."

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 6 April '09

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

1327	Noted that JPL Sentry has updated its 2009 FJ risk assessment - see above Noted that NEODyS has updated its 2009 FJ risk assessment - see above Grabbed MPEC 2009-G19 - Daily Orbit Update - see above
0455	Grabbed MPEC 2009-G18 - 2008 JV19 - see above Noted that the NEOCP has become active

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