2009-02-25 Tracking News

Contents on 25 February '09

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- five MPECs
Observers -- fifteen 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 25 February '09

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty. There were five listings noted earlier today.

New MPECs on 25 February '09

Minor Planet Electronic Circulars

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

MPEC 2009-D60 time-stamped "07:07 UT" - Daily Orbit Update - see below
MPEC 2009-D61 time-stamped "12:14 UT" - 2009 DR36 - see below
MPEC 2009-D62 time-stamped "12:17 UT" - 2009 DS36 - see below
MPEC 2009-D63 time-stamped "18:29 UT" - 2009 DH39 - see below
MPEC 2009-D64 time-stamped "20:18 UT" - 2009 BP58

MPEC 2009-D64 - "20:18 UT" - 2009 BP58

K09B58P 2009 BP58 (H=18.7 ~616m) from NEAT's Mt. Palomar telescope (2002 Nov. 7.47-49p3 & 2002 Nov. 12.43-47p3)

MPEC 2009-D63 - "18:29 UT" - 2009 DH39

K09D39H 2009 DH39 (risk-listed, i=51.5°, Earth MOID=6.0 LD, H=18.7 ~616m) was discovered at 1129 UT on 25 Feb. by the Siding Spring Survey (SSS), which observed it at Feb. 25.48-53p9. The discovery was confirmed by Farra d'Isonzo Obs. (Feb. 25.75p2).

MPEC 2009-D62 - "12:17 UT" - 2009 DS36

K09D36S 2009 DS36 (small asteroid, H=25.8 ~23m) was discovered at 0241 UT on 25 Feb. by Calar Alto Obs., which observed it at Feb. 25.11-23p13. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 25.27-31p4) and Sandlot Obs. (Feb. 25.37p2).

MPEC 2009-D61 - "12:14 UT" - 2009 DR36

K09D36R 2009 DR36 (H=20.7 ~245m) was discovered at 1159 UT on 24 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 24.50-54p6. The discovery was confirmed by Calar Alto Obs. (Feb. 25.05p3) and MRO (Feb. 25.33-34p4).

<< DOU on 25 Feb. '09 >> MPEC 2009-D60 - "07:07 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D01E 2009 DE1 (small asteroid, arc=5 days, H=24.3 ~47m) from CSS (Feb. 24.48p3)
K09D01A 2009 DA1 (small asteroid, Q=4.320 AU, arc=5 days, H=22.3 ~117m) from La Sagra Obs. (Feb. 23.89-90p3), Astronomical Research Obs. (ARO) (Feb. 24.18-19p3), and the Spacewatch 1.8m telescope (Feb. 24.24-25p2)
Observations of recently (no longer) risk-listed objects
K09D03R 2009 DR3 (arc=10 days, H=21.5 ~170m) from CSS (Feb. 14.25-27p3 & 24.20-21p4), La Sagra Obs. (Feb. 16.97-99p3 & 17.98-01p3), and ARO (Feb. 24.12-13p3)
K09B71L 2009 BL71 (almost small, arc=25 days, H=21.9 ~141m) from ARO (Feb. 24.04-06p3)
K09B58C 2009 BC58 (arc=30 days, H=18.8 ~589m) from Spacewatch 1.8m (Feb. 24.22-23p3)
Observations of small asteroids (H>22.0)
K09D10U 2009 DU10 (arc=2 days, H=26.9 ~14m) from ARO (Feb. 23.33p3) and CSS (Feb. 24.19-21p9 & 24.27p3)
K09D10T 2009 DT10 (arc=3 days, H=22.8 ~93m) from ARO (Feb. 24.21-22p2)
K09D01O 2009 DO1 (arc=5 days, H=23.1 ~81m) from Spacewatch 1.8m (Feb. 24.34-35p3) and CSS (Feb. 24.36-37p4)
K09D01C 2009 DC1 (arc=5 days, H=24.0 ~54m) from ARO (Feb. 24.15p4)
K09D01B 2009 DB1 (arc=5 days, H=22.9 ~89m) from ARO (Feb. 23.22p4 & 24.11-12p3) and CSS (Feb. 24.18p4)
K09D00W 2009 DW (arc=7 days, H=25.9 ~22m) from Spacewatch 1.8m (Feb. 24.36-37p2)
K09D00V 2009 DV (arc=7 days, H=24.9 ~35m) from Spacewatch 1.8m (Feb. 24.40-41p3)
K09D00D 2009 DD (arc=8 days, H=25.6 ~26m) from Spacewatch 1.8m (Feb. 24.32p2)
K09C01U 2009 CU1 (arc=21 days, H=22.5 ~107m) from ARO (Feb. 24.18-19p3)
K09C01T 2009 CT1 (arc=21 days, H=24.3 ~47m) from Spacewatch 1.8m (Feb. 24.43-45p3)
K09B58M 2009 BM58 (Q=4.038 AU, arc=26 days, H=24.2 ~49m) from Spacewatch 1.8m (Feb. 24.42-43p3)
K09B58H 2009 BH58 (arc=27 days, H=23.5 ~68m) from Spacewatch 1.8m (Feb. 24.48-49p3)
K00C59K 2000 CK59 (arc=2 opp, H=24.1 ~51m) from Spacewatch 1.8m (Feb. 24.38-39p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09C05R 2009 CR5 (arc=10 days, H=22.0 ~135m) from ARO (Feb. 24.08-10p3)
Observations of other objects
K09D12B 2009 DB12 (arc=2 days, H=21.5 ~170m) from ARO (Feb. 24.12-13p3) and CSS (Feb. 24.18p4)
K09D09G 2009 DG9 (Q=4.497 AU, arc=2 days, H=20.9 ~224m) from ARO (Feb. 23.39-40p3)
K09D04Q 2009 DQ4 (arc=5 days, H=21.0 ~214m) from ARO (Feb. 24.19-21p3), CSS (Feb. 24.25-26p4), and Rio Cuarto Obs. (Feb. 25.15-17p4)
K09D04O 2009 DO4 (i=38.0°, Q=4.239 AU, arc=4 days, H=21.3 ~186m) from ARO (Feb. 24.15-16p3) and CSS (Feb. 24.20-21p4)
K09D01N 2009 DN1 (arc=5 days, H=20.2 ~309m) from ARO (Feb. 24.07-12p6)
K09D01L 2009 DL1 (arc=5 days, H=18.9 ~562m) from the Spacewatch 0.9m telescope (Feb. 24.43-47p3)
K09D01D 2009 DD1 (arc=5 days, H=20.3 ~295m) from ARO (Feb. 24.14p3) and CSS (Feb. 24.20-21p4)
K09D00Z 2009 DZ (arc=6 days, H=21.4 ~178m) from CSS (Feb. 24.18p4)
K09C05P 2009 CP5 (arc=10 days, H=21.3 ~186m) from ARO (Feb. 24.13-14p3)
K09B77D 2009 BD77 (arc=24 days, H=20.4 ~282m) from Spacewatch 0.9m (Feb. 20.40-42p2) and Hamamatsu-Yuto Obs. (Feb. 21.70-73p5)
K09B05T 2009 BT5 (arc=35 days, H=20.6 ~257m) from ARO (Feb. 24.17p3)
K09A16H 2009 AH16 (arc=40 days, H=17.5 ~1.07 km) from CSS (Feb. 24.35-36p4)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from Hamamatsu-Yuto Obs. (Feb. 21.47-49p5)
K06G02Q 2006 GQ2 (arc=3 opp, H=18.0 ~851m) from CSS (Feb. 24.53p3)
K06E52V 2006 EV52 (arc=4 opp, H=16.9 ~1.41 km) from Spacewatch 0.9m (Feb. 20.40-44p3 & 24.36-40p3)
K06B10C 2006 BC10 (arc=3 opp, H=19.5 ~426m) from El Guijo Obs. (Feb. 23.92-94p3)
K05S19G 2005 SG19 (Q=4.171 AU, arc=2 opp, H=16.7 ~1.55 km) from CSS (Feb. 24.46-48p4)
K05J80Y 2005 JY80 (Q=4.120 AU, arc=3 opp, H=16.7 ~1.55 km) from Spacewatch 1.8m (Feb. 24.50-52p3 at V=21.9-22.1)
K05E00F 2005 EF (arc=2 opp, H=20.7 ~245m) from CSS (Feb. 24.39-41p4)
K04E09U 2004 EU9 (arc=3 opp, H=18.9 ~562m) from Hamamatsu-Yuto Obs. (Feb. 21.66-70p10)
K03Y01X 2003 YX1 (arc=2 opp, H=20.9 ~224m) from CSS (Feb. 24.21-22p4)
K03Q47N 2003 QN47 (arc=3 opp, H=18.1 ~812m) from ARO (Feb. 24.03-06p3 at V=22.1-4)
K5744 205744 2002 BK25 from Spacewatch 0.9m (Feb. 24.48-51p3)
G2063 162063 1997 EH29 from Spacewatch 0.9m (Feb. 24.31-35p3)
F3953 153953 2002 AD9 from CSS (Feb. 24.43-45p4)
E3651 143651 2003 QO104 from CSS (Feb. 24.43-45p4)
E1495 141495 2002 EZ11 from Spacewatch 0.9m (Feb. 24.36-40p3)
D9622 139622 2001 QQ142 from Spacewatch 0.9m (Feb. 24.48-50p3)
89355 89355 2001 VS78 from El Guijo Obs. (Feb. 23.80-82p3)
85867 85867 1999 BY9 from Spacewatch 0.9m (Feb. 24.31-35p3)
85275 85275 1994 LY from CSS (Feb. 24.39-41p4)
52768 52768 1998 OR2 from CSS (Feb. 24.50-52p4)
10302 10302 1989 ML from CSS (Feb. 24.33-34p3) and the Mt. Lemmon Survey (MLS) (Feb. 24.34-35p4)
07753 7753 1988 XB from Spacewatch 0.9m (Feb. 22.29-33p3)
07480 7480 Norwan (1994 PC) from CSS (Feb. 24.33-34p4)
04179 4179 Toutatis (1989 AC) from Spacewatch 0.9m (Feb. 20.14-17p3)

Observers on 25 February '09

Fifteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 18 in MPEC 2009-D60 -- 2009 DU10, 2009 DT10, 2009 DR3, 2009 DQ4, 2009 DO4, 2009 DN1, 2009 DG9, 2009 DD1, 2009 DC1, 2009 DB12, 2009 DB1, 2009 DA1, 2009 CU1, 2009 CR5, 2009 CP5, 2009 BT5, 2009 BL71, 2003 QN47
`493`	Calar Alto Obs. in Spain, 2 in MPECs 2009-D61 & 2009-D62 -- 2009 DS36, 2009 DR36
`703`	Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2009-D60 & 2009-D61 -- 2009 DZ, 2009 DU10, 2009 DR36, 2009 DR3, 2009 DQ4, 2009 DO4, 2009 DO1, 2009 DE1, 2009 DD1, 2009 DB12, 2009 DB1, 2009 AH16, 2006 GQ2, 2005 SG19, 2005 EF, 2003 YX1, 85275, 52768, 153953, 143651, 10302, 7480
`J27`	El Guijo Obs. in Spain, 2 in MPEC 2009-D60 -- 2006 BC10, 89355
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2009-D63 -- 2009 DH39
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2009-D60 -- 2009 BD77, 2006 WZ2, 2004 EU9
`J75`	La Sagra Obs. in Spain, 2 in MPEC 2009-D60 -- 2009 DR3, 2009 DA1
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 2 in MPECs 2009-D61 & 2009-D62 -- 2009 DS36, 2009 DR36
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2009-D60 -- 10302
`644`	NEAT's Mt. Palomar telescope in southern California, 1 in MPEC 2009-D64 -- 2009 BP58
`I20`	Rio Cuarto Obs. in Argentina, 1 in MPEC 2009-D60 -- 2009 DQ4
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2009-D62 -- 2009 DS36
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-D63 -- 2009 DH39
`691`	Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2009-D60 -- 2009 DL1, 2009 BD77, 2006 EV52, 85867, 205744, 162063, 141495, 139622, 7753, 4179
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPEC 2009-D60 -- 2009 DW, 2009 DV, 2009 DO1, 2009 DD, 2009 DA1, 2009 CT1, 2009 BM58, 2009 BH58, 2009 BC58, 2005 JY80, 2000 CK59

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

Impact Risk Monitoring on 25 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 DH39	JPL Sentry	2101	2012-2108	14	4.2e-09	-3.97	-4.09	0	JPL: "Analysis based on 11 observations spanning .27142 days (2009-Feb-25.47873 to 2009-Feb-25.75015)." Diameter approximately 0.666 km. from mean, weighted H=18.5.

2009 DE1	JPL Sentry	1514	R E M O V E D						JPL: Risk listing removed at 0953 UTC.

2009 DA1	JPL Sentry	1514	2064	1	1.0e-08	-6.56	-6.56	0	JPL: "Analysis based on 42 observations spanning 5.1836 days (2009-Feb-19.06293 to 2009-Feb-24.24653)." Diameter approximately 0.110 km. from mean, weighted H=22.4.
2009 DA1	NEODyS	1514	2064	1	6.77e-09	-6.78	-6.78	0	NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2009/02/19.064 to 2009/02/24.247."

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 25 February '09

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

2101	Noted that JPL Sentry has posted 2009 DH39 as an impact risk - see above Grabbed MPEC 2009-D64 - 2009 BP58 - see above
1858	Grabbed MPEC 2009-D63 - 2009 DH39 - see above Noted that the NEOCP has become empty
1514	Noted that JPL Sentry has updated its 2009 DA1 risk assessment - see above Noted that NEODyS has updated its 2009 DA1 risk assessment - see above Noted that JPL Sentry has removed 2009 DE1 as an impact risk - see above Grabbed MPEC 2009-D60 - Daily Orbit Update - see above Grabbed MPEC 2009-D61 - 2009 DR36 - see above Grabbed MPEC 2009-D62 - 2009 DS36 - see above

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