2009-02-24 Tracking News

Contents on 24 February '09

IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- one MPEC
Observers -- ten observing facilities
Impact Risk Monitoring -- three 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 24 February '09

The MPC's NEO Confirmation Page has 3 listings: 1 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and two updated listings. All of these were "one nighters." So far The Tracking News has counted a total of six objects listed on the NEOCP at some point today.

To learn how observers use the NEOCP, see the Practical guide on how to observe NEOCP object by Birtwhistle et al. at Suno Observatory.

New MPECs on 24 February '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 24 Feb. '09 >> MPEC 2009-D59 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D10S 2009 DS10 (arc=3 days, H=21.0 ~214m) from the Spacewatch 1.8m telescope (Feb. 24.17-18p2)
K09D01M 2009 DM1 from Astronomical Research Obs. (ARO) (Feb. 23.03-04p4)
K09D01A 2009 DA1 (small asteroid, Q=4.305 AU, arc=5 days, H=22.3 ~117m) from La Sagra Obs. (Feb. 21.04-06p4, 21.91-93p3 & 23.96-98p3) and ARO (Feb. 23.37-38p3)
Observations of recently (no longer) risk-listed objects
K09D03R 2009 DR3 (arc=4 days, H=21.5 ~170m) from Petit Jean Mtn. South Obs. (PJMSO) (Feb. 23.32-33p7) and Sormano Obs. (Feb. 23.98-99p4)
K09D01F 2009 DF1 (arc=4 days, H=20.7 ~245m) from ARO (Feb. 23.44-45p4)
K09C05V 2009 CV5 (small asteroid, arc=8 days, H=24.9 ~35m) from ARO (Feb. 23.40-41p4)
K09C04R 2009 CR4 (arc=11 days, H=21.7 ~155m) from the Spacewatch 0.9m telescope (Feb. 20.18-21p3) and Spacewatch 1.8m (Feb. 24.21-22p3)
K09C02A 2009 CA2 (arc=20 days, H=18.8 ~589m) from ARO (Feb. 23.49p3)
K09C00S 2009 CS (arc=21 days, H=19.8 ~371m) from PJMSO (Feb. 23.36-37p6)
K09B81D 2009 BD81 (Q=4.241 AU, arc=23 days, H=20.7 ~245m) from ARO (Feb. 23.02-03p4)
Observations of small asteroids (H>22.0)
K09D04P 2009 DP4 (arc=3 days, H=23.0 ~85m) from ARO (Feb. 23.41-42p4)
K09D04N 2009 DN4 (arc=3 days, H=26.0 ~21m) from ARO (Feb. 23.14p2)
K09D01O 2009 DO1 (arc=4 days, H=23.2 ~78m) from ARO (Feb. 23.46-47p3)
K09D01C 2009 DC1 (arc=4 days, H=24.0 ~54m) from ARO (Feb. 23.31p5)
K09D00V 2009 DV (arc=6 days, H=24.9 ~35m) from ARO (Feb. 23.27-28p3)
K09D00D 2009 DD (arc=7 days, H=25.6 ~26m) from ARO (Feb. 23.42-43p4)
K09B58M 2009 BM58 (Q=4.019 AU, arc=23 days, H=24.2 ~49m) from Spacewatch 1.8m (Feb. 21.22-23p3)
Observations of other objects
K09D04Q 2009 DQ4 (arc=3 days, H=21.0 ~214m) from ARO (Feb. 23.32p4)
K09D04O 2009 DO4 (i=37.8°, Q=4.129 AU, arc=3 days, H=21.3 ~186m) from ARO (Feb. 23.31-32p4)
K09D01N 2009 DN1 (arc=4 days, H=20.2 ~309m) from ARO (Feb. 23.20-21p3)
K09D01L 2009 DL1 (arc=4 days, H=18.9 ~562m) from ARO (Feb. 23.45-46p3)
K09D01D 2009 DD1 (arc=4 days, H=20.3 ~295m) from ARO (Feb. 23.30-31p3)
K09D00Z 2009 DZ (arc=6 days, H=21.4 ~178m) from ARO (Feb. 23.08p4) and Sormano Obs. (Feb. 23.94p3)
K09C05T 2009 CT5 (q=0.281 AU, arc=8 days, H=18.7 ~616m) from ARO (Feb. 23.09p5)
K09C05S 2009 CS5 (arc=10 days, H=19.4 ~446m) from ARO (Feb. 23.17-19p3) and Spacewatch 1.8m (Feb. 24.20p3)
K09C05P 2009 CP5 (arc=10 days, H=21.3 ~186m) from ARO (Feb. 23.15p3) and Sormano Obs. (Feb. 23.96p3)
K09C05O 2009 CO5 (arc=20 days, H=21.7 ~155m) from Cyclops Obs. (Feb. 18.81-83p4)
K09C03A 2009 CA3 (arc=19 days, H=20.1 ~323m) from ARO (Feb. 23.10-11p3)
K09C02Z 2009 CZ2 (Q=4.064 AU, arc=19 days, H=19.1 ~513m) from ARO (Feb. 23.07p3)
K09B77D 2009 BD77 (arc=24 days, H=20.4 ~282m) from LINEAR (Feb. 23.33-39p5)
K09B71K 2009 BK71 (i=36.3°, arc=24 days, H=19.4 ~446m) from ARO (Feb. 23.16-17p3)
K09B71A 2009 BA71 (arc=2 opp, H=20.7 ~245m) from PJMSO (Feb. 23.34-35p6)
K09B58P 2009 BP58 (arc=24 days, H=18.7 ~616m) from the Catalina Sky Survey (CSS) (Feb. 22.25-26p4)
K08Y26G 2008 YG26 (arc=56 days, H=21.7 ~155m) from ARO (Feb. 23.11-14p3 at V=22.0-22.1)
K08X00P 2008 XP (arc=84 days, H=21.4 ~178m) from ARO (Feb. 23.05-09p3 at V=21.9-22.1)
K08W64M 2008 WM64 (arc=91 days, H=20.5 ~269m) from ARO (Feb. 23.46-48p3 at V=21.8-22.1)
K08U95C 2008 UC95 (arc=116 days, H=18.6 ~645m) from CSS (Feb. 22.17-19p4)
K08M05B 2008 MB5 (arc=237 days, H=19.2 ~490m) from CSS (Feb. 22.25-27p4)
K08E32A 2008 EA32 (IEO, Q=0.804 AU, arc=2 opp, H=16.5 ~1.70 km) from Schiaparelli Obs. (Feb. 21.82-85p3)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from PJMSO (Feb. 23.33p5)
K06B10C 2006 BC10 (arc=3 opp, H=19.5 ~426m) from PJMSO (Feb. 23.33-34p5)
K05L08H 2005 LH8 (Q=4.121 AU, arc=3 opp, H=18.6 ~645m) from ARO (Feb. 23.24-25p2 at V=22.1)
K04E09U 2004 EU9 (arc=3 opp, H=18.9 ~562m) from Schiaparelli Obs. (Feb. 22.06-07p5) and LINEAR (Feb. 23.33-38p5)
K03A23B 2003 AB23 (arc=4 opp, H=19.9 ~355m) from ARO (Feb. 23.27-30p3 at V=22.1-2)
K02V94Y 2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.8 ~1.48 km) from LINEAR (Feb. 23.10-15p5)
K00CA1T 2000 CT101 (arc=5 opp, H=20.7 ~245m) from ARO (Feb. 23.40-43p3 at V=22.3-4)
J99C08W 1999 CW8 (arc=3 opp, H=18.6 ~645m) from LINEAR (Feb. 23.21-25p3)
K6359 206359 2003 QM47 from LINEAR (Feb. 23.27-31p5)
K0840 200840 2001 XN254 from LINEAR (Feb. 23.15-20p5)
55532 55532 2001 WG2 from LINEAR (Feb. 23.10-14p5)
35107 35107 1991 VH from LINEAR (Feb. 23.16-19p4)
22753 22753 1998 WT from LINEAR (Feb. 23.21-26p5)
08567 8567 1996 HW1 from Cyclops Obs. (Feb. 18.79p3)
03122 3122 Florence (1981 ET3) from LINEAR (Feb. 23.32-38p5)
01980 1980 Tezcatlipoca (1950 LA) from Schiaparelli Obs. (Feb. 21.81-85p4)

Observers on 24 February '09

Ten observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 30 in MPEC 2009-D59 -- 2009 DZ, 2009 DV, 2009 DQ4, 2009 DP4, 2009 DO4, 2009 DO1, 2009 DN4, 2009 DN1, 2009 DM1, 2009 DL1, 2009 DF1, 2009 DD1, 2009 DD, 2009 DC1, 2009 DA1, 2009 CZ2, 2009 CV5, 2009 CT5, 2009 CS5, 2009 CP5, 2009 CA3, 2009 CA2, 2009 BK71, 2009 BD81, 2008 YG26, 2008 XP, 2008 WM64, 2005 LH8, 2003 AB23, 2000 CT101
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2009-D59 -- 2009 BP58, 2008 UC95, 2008 MB5
`B84`	Cyclops Obs. in The Netherlands, 2 in MPEC 2009-D59 -- 2009 CO5, 8567
`704`	LINEAR in New Mexico, 10 in MPEC 2009-D59 -- 2009 BD77, 2004 EU9, 2002 VY94, 1999 CW8, 55532, 35107, 22753, 206359, 200840, 3122
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2009-D59 -- 2009 DA1
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-D59 -- 2009 DR3, 2009 CS, 2009 BA71, 2006 WZ2, 2006 BC10
`204`	Schiaparelli Obs. in Italy, 3 in MPEC 2009-D59 -- 2008 EA32, 2004 EU9, 1980
`587`	Sormano Obs. in Italy, 3 in MPEC 2009-D59 -- 2009 DZ, 2009 DR3, 2009 CP5
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2009-D59 -- 2009 CR4
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2009-D59 -- 2009 DS10, 2009 CS5, 2009 CR4, 2009 BM58

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

Impact Risk Monitoring on 24 February '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 DS10	NEODyS	1459	R E M O V E D						-
2009 DS10	JPL Sentry	1459	R E M O V E D						JPL: Risk listing removed at 0951 UTC.

2009 DM1	NEODyS	1500	2010-2087	35	5.89e-08	-3.22	-3.68	0	NEODyS: "Based on 33 optical observations (of which 0 are rejected as outliers) from 2009/02/19.116 to 2009/02/23.043."
2009 DM1	JPL Sentry	1459	2010-2083	26	5.5e-08	-3.25	-3.69	0	JPL: "Analysis based on 33 observations spanning 3.9276 days (2009-Feb-19.11474 to 2009-Feb-23.04234)." Diameter approximately 1.100 km. from mean, weighted H=17.4.

2009 DA1	NEODyS	1500	2064	1	1.8e-08	-6.35	-6.35	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2009/02/19.064 to 2009/02/23.985."
2009 DA1	JPL Sentry	1459	2064	1	2.5e-08	-6.16	-6.16	0	JPL: "Analysis based on 34 observations spanning 4.9215 days (2009-Feb-19.06293 to 2009-Feb-23.98439)." Diameter approximately 0.110 km. from mean, weighted H=22.4.

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 24 February '09

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

1500	Noted that NEODyS has updated its 2009 DA1 risk assessment - see above Noted that NEODyS has updated its 2009 DM1 risk assessment - see above
1459	Noted that JPL Sentry has updated its 2009 DA1 risk assessment - see above Noted that JPL Sentry has updated its 2009 DM1 risk assessment - see above Noted that JPL Sentry has removed 2009 DS10 as an impact risk - see above Noted that NEODyS has removed 2009 DS10 as an impact risk - see above Grabbed MPEC 2009-D59 - Daily Orbit Update - see above

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