2009-03-04 Tracking News

Contents on 4 March '09

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- one MPEC
Observers -- sixteen observing facilities
Impact Risk Monitoring -- nine 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 4 March '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. This was a "one nighter." So far The Tracking News has counted a total of two 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 by Birtwhistle et al. at Suno Observatory.

New MPECs on 4 March '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 4 Mar. '09 >> MPEC 2009-E38 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09E00W 2009 EW (small asteroid, arc=1 day, H=26.4 ~18m) from Astronomical Research Obs. (ARO) (March 3.31p3)
K09D46L 2009 DL46 (arc=3 days, H=21.4 ~178m) from the Spacewatch 1.8m telescope (March 3.32-33p3) and ARO (March 3.41-42p3)
K09D43C 2009 DC43 (arc=5 days, H=18.1 ~812m) from ARO (March 3.43-48p6) and Spacewatch 1.8m (March 3.46-47p3)
K09D42Z 2009 DZ42 (arc=5 days, H=19.6 ~407m) from ARO (March 3.04-05p3)
Observations of recently (no longer) risk-listed objects
K09D47E 2009 DE47 (arc=3 days, H=18.5 ~676m) from Spacewatch 1.8m (March 3.43p3) and ARO (March 3.47p3)
K09D45A 2009 DA45 (small asteroid, arc=4 days, H=22.4 ~112m) from the Mt. Lemmon Survey (MLS) (March 3.26-30p8)
K09D43V 2009 DV43 (small asteroid, arc=4 days, H=23.7 ~62m) from ARO (March 3.27-28p3)
K09D42V 2009 DV42 (arc=5 days, H=18.5 ~676m) from ARO (March 3.45-46p3)
K09D39H 2009 DH39 (i=53.3°, arc=6 days, H=18.8 ~589m) from ARO (March 3.05-06p3) and LINEAR (March 3.11-15p4)
K09D03R 2009 DR3 (arc=17 days, H=21.4 ~178m) from ARO (March 3.28-29p3)
K09D01M 2009 DM1 (Q=4.577 AU, arc=12 days, H=17.1 ~1.29 km) from ARO (March 3.07p3)
K09D01F 2009 DF1 (arc=12 days, H=20.6 ~257m) from ARO (March 3.44-45p3)
K09C02R 2009 CR2 (Q=5.038 AU, arc=29 days, H=16.5 ~1.70 km) from Guidestar Obs. (March 3.80-82p3)
Observations of small asteroids (H>22.0)
K09E01G 2009 EG1 (arc=0 days, H=23.5 ~68m) from ARO (March 3.47-48p3)
K09E01F 2009 EF1 (arc=0 days, H=24.2 ~49m) from ARO (March 3.46p3)
K09E00U 2009 EU (arc=1 day, H=26.5 ~17m) from ARO (March 3.23-24p3)
K09E00R 2009 ER (arc=1 day, H=25.0 ~34m) from ARO (March 3.19-20p3)
K09D45N 2009 DN45 (arc=3 days, H=24.8 ~37m) from ARO (March 3.32p4)
K09D45D 2009 DD45 (arc=4 days, H=25.7 ~25m) from Siegen Obs. (March 3.01-04p2)
K09D36S 2009 DS36 (arc=6 days, H=25.7 ~25m) from Mt. John Obs. (March 3.48-49p3)
K09D10T 2009 DT10 (arc=10 days, H=22.9 ~89m) from ARO (March 3.21-22p3)
K09D01O 2009 DO1 (arc=12 days, H=23.1 ~81m) from Spacewatch 1.8m (March 3.48-49p3)
K09D01C 2009 DC1 (arc=12 days, H=24.0 ~54m) from ARO (March 3.17-19p6)
Observations of other objects
K09E01D 2009 ED1 (arc=1 day, H=19.7 ~389m) from ARO (March 3.46-47p3) and Mt. John Obs. (March 3.63p4)
K09E01B 2009 EB1 (arc=1 day, H=20.4 ~282m) from ARO (March 3.27-28p3)
K09E00Z 2009 EZ (arc=1 day, H=20.6 ~257m) from ARO (March 3.29-30p3), LINEAR (March 3.34-37p4), Ernesto Guido via RAS Obs. Mayhill (March 3.39-41p2), and Mt. John Obs. (March 3.61p5)
K09D46K 2009 DK46 (Q=4.020 AU, arc=3 days, H=18.1 ~812m) from MLS (March 3.43-50p8)
K09D45M 2009 DM45 (arc=6 days, H=21.4 ~178m) from ARO (March 3.14-15p2)
K09D36R 2009 DR36 (arc=7 days, H=20.6 ~257m) from ARO (March 3.41p4)
K09D09G 2009 DG9 (Q=4.544 AU, arc=10 days, H=21.0 ~214m) from ARO (March 3.34-35p3)
K09D04Q 2009 DQ4 (arc=11 days, H=21.0 ~214m) from ARO (March 3.33p3) and Mt. John Obs. (March 3.64p3)
K09D01N 2009 DN1 (arc=12 days, H=20.3 ~295m) from ARO (March 3.15-16p3)
K09D01L 2009 DL1 (arc=12 days, H=18.8 ~589m) from the Spacewatch 0.9m telescope (Feb. 27.47-48p2), LINEAR (March 3.33-38p5), and ARO (March 3.36p4)
K09D01D 2009 DD1 (arc=12 days, H=20.3 ~295m) from ARO (March 3.23-24p4)
K09C01S 2009 CS1 (arc=28 days, H=21.0 ~214m) from ARO (March 3.04-05p3)
K09B81H 2009 BH81 (i=45.1°, arc=31 days, H=19.5 ~426m) from ARO (March 3.43p3)
K09B02L 2009 BL2 (arc=44 days, H=19.2 ~490m) from ARO (March 3.09p3)
K09A16F 2009 AF16 (arc=47 days, H=21.2 ~195m) from ARO (March 3.12-14p4)
K08U94Z 2008 UZ94 (arc=126 days, H=17.6 ~1.02 km) from ARO (March 3.06-07p4)
K08U91V 2008 UV91 (arc=126 days, H=20.1 ~323m) from the Catalina Sky Survey (CSS) (March 2.48-49p4), Great Shefford Obs. (March 3.13p3), Sabino Canyon Obs. (March 3.28-29p3), ARO (March 3.40-42p7), and Magdalena Ridge Obs. (MRO) (March 3.49-50p2)
K08TF7K 2008 TK157 (arc=161 days, H=20.6 ~257m) from ARO (March 3.09-10p2 at V=22.0-22.1)
K08Q03T 2008 QT3 (arc=188 days, H=18.8 ~589m) from Boambee Obs. (Feb. 28.49-51p2)
K08O09B 2008 OB9 (Q=5.652 AU, arc=2 opp, H=17.5 ~1.07 km) from ARO (March 3.08p3)
K08E00E 2008 EE (arc=2 opp, H=19.7 ~389m) from CSS (March 3.17p3)
K06S06D 2006 SD6 (arc=2 opp, H=20.2 ~309m) from Spacewatch 0.9m (Feb. 27.40-44p3)
K06G02Q 2006 GQ2 (arc=3 opp, H=18.0 ~851m) from LINEAR (March 3.44-48p5)
K05S19G 2005 SG19 (Q=4.171 AU, arc=2 opp, H=16.7 ~1.55 km) from LINEAR (March 3.38-43p5)
K05GB9W 2005 GW119 (arc=4 opp, H=18.4 ~708m) from Spacewatch 0.9m (Feb. 27.28-32p3)
K04V00V 2004 VV (i=52.4°, arc=4 opp, H=17.2 ~1.23 km) from Spacewatch 0.9m (Feb. 28.21p1)
K01C32K 2001 CK32 (arc=2 opp, H=18.9 ~562m) from Thierry Pauwels via Uccle Obs. (March 2.83-85p6) and Guidestar Obs. (March 3.78-79p3)
K00S20T 2000 ST20 (arc=4 opp, H=19.1 ~513m) from Spacewatch 0.9m (Feb. 27.23-27p3)
K00GC7U 2000 GU127 (arc=6 opp, H=18.5 ~676m) from Spacewatch 0.9m (Feb. 27.28-32p3)
K00B19L 2000 BL19 (Q=4.472 AU, arc=2 opp, H=19.9 ~355m) from Boambee Obs. (March 1.40-44p3)
J96B03Z 1996 BZ3 (Q=4.029 AU, arc=4 opp, H=18.2 ~776m) from LINEAR (March 3.33-37p5)
K6910 206910 2004 NL8 from Spacewatch 0.9m (Feb. 27.36-39p3)
G2080 162080 1998 DG16 from Guidestar Obs. (March 3.83-84p4)
D8325 138325 2000 GO82 from Spacewatch 0.9m (Feb. 27.29-34p3)
22771 22771 1999 CU3 from Spacewatch 0.9m (Feb. 27.16-20p3)
16834 16834 1997 WU22 from Boambee Obs. (Feb. 28.42-49p3)
08034 8034 Akka (1992 LR) from Spacewatch 0.9m (March 1.16-20p3)
05604 5604 1992 FE from the Siding Spring Survey (SSS) (March 2.68-69p3)
04957 4957 Brucemurray (1990 XJ) from Boambee Obs. (Feb. 28.47-49p2)
04055 4055 Magellan (1985 DO2) from Boambee Obs. (Feb. 28.44p1 & 28.52p1)
03551 3551 Verenia (1983 RD) from Spacewatch 0.9m (Feb. 27.30-34p3)
03102 3102 Krok (1981 QA) from Spacewatch 0.9m (Feb. 28.46-50p3)
01917 1917 Cuyo (1968 AA) from Boambee Obs. (Feb. 28.43-46p2 & 28.51p1)

Observers on 4 March '09

Sixteen observing facilities appear in today's MPEC.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 36 in MPEC 2009-E38 -- 2009 EZ, 2009 EW, 2009 EU, 2009 ER, 2009 EG1, 2009 EF1, 2009 ED1, 2009 EB1, 2009 DZ42, 2009 DV43, 2009 DV42, 2009 DT10, 2009 DR36, 2009 DR3, 2009 DQ4, 2009 DN45, 2009 DN1, 2009 DM45, 2009 DM1, 2009 DL46, 2009 DL1, 2009 DH39, 2009 DG9, 2009 DF1, 2009 DE47, 2009 DD1, 2009 DC43, 2009 DC1, 2009 CS1, 2009 BL2, 2009 BH81, 2009 AF16, 2008 UZ94, 2008 UV91, 2008 TK157, 2008 OB9
`432`	Boambee Obs. in New South Wales, 6 in MPEC 2009-E38 -- 2008 QT3, 2000 BL19, 16834, 4957, 4055, 1917
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2009-E38 -- 2008 UV91, 2008 EE
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-E38 -- 2008 UV91
`A17`	Guidestar Obs. in Germany, 3 in MPEC 2009-E38 -- 2009 CR2, 2001 CK32, 162080
`704`	LINEAR in New Mexico, 6 in MPEC 2009-E38 -- 2009 EZ, 2009 DL1, 2009 DH39, 2006 GQ2, 2005 SG19, 1996 BZ3
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-E38 -- 2008 UV91
`474`	Mt. John Obs. in New Zealand, 4 in MPEC 2009-E38 -- 2009 EZ, 2009 ED1, 2009 DS36, 2009 DQ4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2009-E38 -- 2009 DK46, 2009 DA45
`H06%`	Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-E38 -- 2009 EZ
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2009-E38 -- 2008 UV91
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2009-E38 -- 5604
`510`	Siegen Obs. in Germany, 1 in MPEC 2009-E38 -- 2009 DD45
`691`	Spacewatch 0.9m telescope in Arizona, 12 in MPEC 2009-E38 -- 2009 DL1, 2006 SD6, 2005 GW119, 2004 VV, 2000 ST20, 2000 GU127, 22771, 206910, 138325, 8034, 3551, 3102
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2009-E38 -- 2009 DO1, 2009 DL46, 2009 DE47, 2009 DC43
`0122`	Thierry Pauwels via Uccle Obs. in Belgium, 1 in MPEC 2009-E38 -- 2001 CK32

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

Impact Risk Monitoring on 4 March '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 EK1	JPL Sentry	0306	2016-2108	100	7.2e-07	-4.26	-4.68	0	JPL: "Analysis based on 17 observations spanning 1.0678 days (2009-Mar-02.34255 to 2009-Mar-03.41031)." Diameter approximately 0.178 km. from mean, weighted H=21.4.

2009 EJ1	NEODyS	1614	2025-2090	30	1.72e-07	-8.26	-8.84	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/03/03.280 to 2009/03/03.605."

2009 EH1	NEODyS	1614	2040-2076	13	2.76e-08	-8.82	-8.93	0	NEODyS: "Based on 19 optical observations (of which 1 are rejected as outliers) from 2009/03/03.258 to 2009/03/03.580."

2009 EW	JPL Sentry	1536	2063-2081	22	1.6e-05	-5.55	-5.76	0	JPL: "Analysis based on 25 observations spanning 1.0561 days (2009-Mar-02.29194 to 2009-Mar-03.348)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
2009 EW	NEODyS	1536	2063-2081	22	1.7e-05	-5.53	-5.73	0	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/03/02.293 to 2009/03/03.349."

2009 EV	NEODyS	1536	2010-2090	236	2.69e-08	-4.19	-4.90	0	NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/03/02.266 to 2009/03/03.153."

2009 ES	NEODyS	1536	2016-2083	17	1.55e-08	-5.12	-5.61	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2009/03/02.213 to 2009/03/03.217."

2009 DL46	JPL Sentry	1536	R E M O V E D						JPL: Risk listing removed at 1134 UTC.

2009 DC43	NEODyS	1536	R E M O V E D						-

2009 DZ42	JPL Sentry	1536	2073	1	1.3e-10	-7.41	-7.41	0	JPL: "Analysis based on 52 observations spanning 4.9185 days (2009-Feb-26.12849 to 2009-Mar-03.046956)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
2009 DZ42	NEODyS	1536	2073	1	1.4e-11	-8.40	-8.40	0	NEODyS: "Based on 52 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/03/03.048."

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 March '09

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

1614	Noted that NEODyS has posted 2009 EH1 as an impact risk - see above Noted that NEODyS has posted 2009 EJ1 as an impact risk - see above
1536	Noted that NEODyS has removed 2009 DC43 as an impact risk - see above Noted that JPL Sentry has removed 2009 DL46 as an impact risk - see above Noted that JPL Sentry has updated its 2009 DZ42 risk assessment - see above Noted that NEODyS has updated its 2009 DZ42 risk assessment - see above Noted that NEODyS has posted 2009 ES as an impact risk - see above Noted that NEODyS has posted 2009 EV as an impact risk - see above Noted that JPL Sentry has updated its 2009 EW risk assessment - see above Noted that NEODyS has posted 2009 EW as an impact risk - see above Grabbed MPEC 2009-E38 - Daily Orbit Update - see above
0306	Noted that JPL Sentry has posted 2009 EK1 as an impact risk - see above

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