2009-03-03 Tracking News

Contents on 3 March '09

IAU Minor Planet Center
- NEOCP Activity -- two listings: 2 updated
- New MPECs -- 23 MPECs
Observers -- nineteen observing facilities
Impact Risk Monitoring -- ten 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 3 March '09

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two updated listings. Both of these were "one nighters." The Tracking News counted a total of 25 listings on the NEOCP at some point on this day.

New MPECs on 3 March '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there were 23 MPECs posted this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-E15 time-stamped "07:08 UT" - Daily Orbit Update - see below
MPEC 2009-E16 time-stamped "14:15 UT" - 2009 EP - see below
MPEC 2009-E17 time-stamped "14:18 UT" - 2009 EQ - see below
MPEC 2009-E18 time-stamped "14:21 UT" - 2009 ER - see below
MPEC 2009-E19 time-stamped "14:24 UT" - 2009 ES - see below
MPEC 2009-E20 time-stamped "14:27 UT" - 2009 ET - see below
MPEC 2009-E21 time-stamped "14:30 UT" - 2009 EU - see below
MPEC 2009-E22 time-stamped "14:33 UT" - 2009 EV - see below
MPEC 2009-E23 time-stamped "14:36 UT" - 2009 EW - see below
MPEC 2009-E24 time-stamped "14:39 UT" - 2009 EX - see below
MPEC 2009-E25 time-stamped "14:42 UT" - 2009 EY - see below
MPEC 2009-E26 time-stamped "14:45 UT" - 2009 EZ - see below
MPEC 2009-E27 time-stamped "14:50 UT" - 2009 EA1 - see below
MPEC 2009-E28 time-stamped "14:53 UT" - 2009 EB1 - see below
MPEC 2009-E29 time-stamped "14:56 UT" - 2009 EC1 - see below
MPEC 2009-E30 time-stamped "15:03 UT" - 2009 ED1 - see below
MPEC 2009-E31 time-stamped "15:06 UT" - 2009 EE1 - see below
MPEC 2009-E32 time-stamped "15:09 UT" - 2009 EF1 - see below
MPEC 2009-E33 time-stamped "15:12 UT" - 2009 EG1 - see below
MPEC 2009-E34 time-stamped "17:22 UT" - 2009 EH1 - see below
MPEC 2009-E35 time-stamped "17:25 UT" - 2009 EJ1 - see below
MPEC 2009-E36 time-stamped "23:51 UT" - 2009 EK1 - see below
MPEC 2009-E37 time-stamped "23:54 UT" - 2009 EM1

MPEC 2009-E37 - "23:54 UT" - 2009 EM1

K09E01M 2009 EM1 (small asteroid, H=22.9 ~89m) was discovered at 0555 UT on 3 March by the Catalina Sky Survey (CSS), which observed it at March 3.25-30p8. The discovery was confirmed by Sabino Canyon Obs. (March 3.30-31p3), Magdalena Ridge Obs. (MRO) (March 3.30-31p4), Astronomical Research Obs. (ARO) (March 3.37p3), and Starkenburg Obs. (March 3.93-94p3).

MPEC 2009-E36 - "23:51 UT" - 2009 EK1

K09E01K 2009 EK1 (Earth MOID=3.8 LD, H=21.6 ~162m) was discovered at 0813 UT on 2 March by the Mt. Lemmon Survey (MLS), which observed it at March 2.34-36p4, 2.41p4, and 3.38-39p3. The discovery was confirmed by ARO (March 3.25-26p3) and the Spacewatch 1.8m telescope (March 3.40-41p3).

MPEC 2009-E35 - "17:25 UT" - 2009 EJ1

K09E01J 2009 EJ1 (risk-listed, Earth MOID=0.1 LD, H=28.4 ~7m) was discovered at 0642 UT on 3 March by the Spacewatch 0.9m telescope, which observed it at March 3.28-31p3. The discovery was confirmed by Spacewatch 1.8m (March 3.36-37p3, 3.44-45p3 & 3.50p3), ARO (March 3.38-39p3), and Mt. John Obs. (March 3.60p6). This object is now within ten lunar distances (LD) of Earth, reaching 1.6 LD on 28 Feb.

MPEC 2009-E34 - "17:22 UT" - 2009 EH1

K09E01H 2009 EH1 (risk-listed, Earth MOID=0.2 LD, H=27.9 ~9m) was discovered at 0611 UT on 3 March by MLS, which observed it at March 3.26-30p16. The discovery was confirmed by Mt. John Obs. (March 3.57-58p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 1.8 LD on 8 March.

MPEC 2009-E33 - "15:12 UT" - 2009 EG1

K09E01G 2009 EG1 (small asteroid, H=23.5 ~68m) was discovered at 0950 UT on 3 March by MLS, which observed it at March 3.41-42p4 and 3.50-51p4. The discovery was confirmed by Sabino Canyon Obs. (March 3.47-48p3) and MRO (March 3.52-53p3).

MPEC 2009-E32 - "15:09 UT" - 2009 EF1

K09E01F 2009 EF1 (small asteroid, H=23.4 ~71m) was discovered at 0946 UT on 3 March by CSS, which observed it at March 3.41-46p7. The discovery was confirmed by Sabino Canyon Obs. (March 3.49-50p3) and MRO (March 3.51-52p3).

MPEC 2009-E31 - "15:06 UT" - 2009 EE1

K09E01E 2009 EE1 (risk-listed, H=25.5 ~27m) was discovered at 0611 UT on 3 March by MLS, which observed it at March 3.26-30p15. The discovery was confirmed by Mt. John Obs. (March 3.54-55p4).

MPEC 2009-E30 - "15:03 UT" - 2009 ED1

K09E01D 2009 ED1 (H=19.6 ~407m) was discovered at 1159 UT on 2 March by MLS, which observed it at March 2.50-54p8. The discovery was confirmed by LINEAR (March 2.41-48p5) and Sabino Canyon Obs. (March 3.35-37p3).

MPEC 2009-E29 - "14:56 UT" - 2009 EC1

K09E01C 2009 EC1 (small asteroid, H=22.7 ~98m) was discovered at 1126 UT on 2 March by CSS, which observed it at March 2.48-53p8 and 3.28-29p4. The discovery was confirmed by MRO (March 2.53p3), Sabino Canyon Obs. (March 3.33-34p3), and MLS (March 3.40p4).

MPEC 2009-E28 - "14:53 UT" - 2009 EB1

K09E01B 2009 EB1 (H=19.9 ~355m) was discovered at 0909 UT on 2 March by MLS, which observed it at March 2.38-40p3, 2.46p4, and 3.38-39p4. The discovery was confirmed by Spacewatch 1.8m (March 2.48-49p3).

MPEC 2009-E27 - "14:50 UT" - 2009 EA1

K09E01A 2009 EA1 (small asteroid, H=25.8 ~23m) was discovered at 0854 UT on 2 March by MLS, which observed it at March 2.30-32p4 at V=21.8-22.6, 2.37-41p8 at V=20.6-21.9, and 3.25p4 at V=20.7-21.0.

MPEC 2009-E26 - "14:45 UT" - 2009 EZ

K09E00Z 2009 EZ (H=20.4 ~282m) was discovered at 0806 UT on 2 March by LINEAR, which observed it at March 2.34-40p4. The discovery was confirmed by MRO (March 3.37-38p2 & 3.42-43p2).

MPEC 2009-E25 - "14:42 UT" - 2009 EY

K09E00Y 2009 EY (small asteroid, Earth MOID=4.4 LD, H=26.5 ~17m) was discovered at 0715 UT on 2 March by MLS, which observed it at March 2.30-37p8, 2.42p4, and 3.24p4. The discovery was confirmed by MRO (March 2.43-44p3).

MPEC 2009-E24 - "14:39 UT" - 2009 EX

K09E00X 2009 EX (small asteroid, H=23.4 ~71m) was discovered at 0713 UT on 2 March by MLS, which observed it at March 2.30-32p4 and 2.37-38p4. The discovery was confirmed by Spacewatch 1.8m (March 3.16-17p3).

MPEC 2009-E23 - "14:36 UT" - 2009 EW

K09E00W 2009 EW (risk-listed, Earth MOID=0.9 LD, H=26.3 ~19m) was discovered at 0700 UT on 2 March by CSS, which observed it at March 2.29-37p8. The discovery was confirmed by MRO (March 2.45-46p4 & 3.33-35p5), Great Shefford Obs. (March 3.05p2), and Sabino Canyon Obs. (March 3.27p3). This object is now within ten lunar distances (LD) of Earth, reaching 1.0 LD on 6 March.

MPEC 2009-E22 - "14:33 UT" - 2009 EV

K09E00V 2009 EV (risk-listed, Earth MOID=5.4 LD, H=19.9 ~355m) was discovered at 0621 UT on 2 March by MLS, which observed it at March 2.27-33p7 at V=21.8-22.4. The discovery was confirmed by MRO (March 2.42-43p3) and Spacewatch 1.8m (March 3.14-15p3).

MPEC 2009-E21 - "14:30 UT" - 2009 EU

K09E00U 2009 EU (small asteroid, Earth MOID=1.0 LD, H=26.5 ~17m) was discovered at 0546 UT on 2 March by MLS, which observed it at March 2.24-26p4 and 2.33p3. The discovery was confirmed by MRO (March 2.39-40p3) and Spacewatch 1.8m (March 3.38-39p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 3.6 LD on 11 March.

MPEC 2009-E20 - "14:27 UT" - 2009 ET

K09E00T 2009 ET (small asteroid, Earth MOID=9.0 LD, H=27.3 ~12m) was discovered at 0544 UT on 2 March by MLS, which observed it at March 2.24-30p8 and 3.23p4. The discovery was confirmed by MRO (March 2.35-36p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.5 LD on 10 March.

MPEC 2009-E19 - "14:24 UT" - 2009 ES

K09E00S 2009 ES (risk-listed, H=20.2 ~309m) was discovered at 0505 UT on 2 March by MLS, which observed it at March 2.21-23p4 at V=21.3-22.2, 2.33-34p3 at V=21.0-21.4, and 3.20-22p4 at V=21.1-21.8. The discovery was confirmed by MRO (March 2.37-39p3).

MPEC 2009-E18 - "14:21 UT" - 2009 ER

K09E00R 2009 ER (small asteroid, H=25.0 ~34m) was discovered at 0457 UT on 2 March by CSS, which observed it at March 2.21-23p4 and 2.41-43p4. The discovery was confirmed by MRO (March 2.26p4 & 3.22-23p4), Sabino Canyon Obs. (March 2.28p3), Great Shefford Obs. (March 3.03-04p3), and MLS (March 3.18p4).

MPEC 2009-E17 - "14:18 UT" - 2009 EQ

K09E00Q 2009 EQ (i=52.0°, Q=4.596 AU, H=18.7 ~616m) was discovered at 0420 UT on 2 March by MLS, which observed it at March 2.18-20p4 at V=21.3-22.6, 2.41p4 at V=21.8-22.7, and 3.21-22p4 at V=22.3-7. The discovery was confirmed by MRO (March 2.23-24p4 & 3.23-24p2) and Spacewatch 1.8m (March 3.13p3).

MPEC 2009-E16 - "14:15 UT" - 2009 EP

K09E00P 2009 EP (small asteroid, H=23.8 ~59m) was discovered at 0357 UT on 2 March by CSS, which observed it at March 2.17-20p3. The discovery was confirmed by Sabino Canyon Obs. (March 2.29-30p3), Marco Micheli via Faulkes Telescope North (March 2.32-33p3), MRO (March 2.33-34p4 & 3.26-27p4), Great Shefford Obs. (March 3.04p4), and MLS (March 3.20p3).

<< DOU on 3 Mar. '09 >> MPEC 2009-E15 - "07:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K09D47E 2009 DE47 (arc=2 days, H=18.3 ~741m) from Guidestar Obs. (March 1.08-09p3) and ARO (March 2.48p3)
K09D46L 2009 DL46 (arc=2 days, H=21.3 ~186m) from Spacewatch 1.8m (March 2.33-34p3) and ARO (March 2.42p3)
K09D43C 2009 DC43 (arc=4 days, H=17.9 ~891m) from Spacewatch 1.8m (March 2.38-39p3)
K09D42Z 2009 DZ42 (arc=4 days, H=19.6 ~407m) from Mt. John Obs. (March 2.42-43p4)
Observations of recently (no longer) risk-listed objects
K09D45B 2009 DB45 (arc=3 days, H=19.2 ~490m) from MLS (March 2.17p2 at V=21.7-22.5)
K09D43V 2009 DV43 (small asteroid, arc=3 days, H=23.7 ~62m) from MLS (March 2.34-36p4)
K09D43T 2009 DT43 (small asteroid, Q=4.176 AU, arc=3 days, H=26.7 ~15m) from Mt. John Obs. (March 2.52p4)
K09D42V 2009 DV42 (arc=4 days, H=18.5 ~676m) from Iowa Robotic Obs. (March 2.32p1 & 2.36p1) and ARO (March 2.43p3)
K09D39H 2009 DH39 (i=53.1°, arc=4 days, H=18.8 ~589m) from the Siding Spring Survey (SSS) (March 1.42-43p2)
K09D03R 2009 DR3 (arc=17 days, H=21.4 ~178m) from LINEAR (March 2.22-27p5), Hamamatsu-Yuto Obs. (March 2.48-51p8), and Thompsonville Obs. (March 3.16-18p6)
K09C05V 2009 CV5 (small asteroid, arc=15 days, H=24.8 ~37m) from ARO (March 2.46-47p3)
K09C04R 2009 CR4 (arc=18 days, H=21.7 ~155m) from Spacewatch 1.8m (March 3.11-12p3)
K09C03B 2009 CB3 (q=0.294 AU, arc=26 days, H=19.4 ~446m) from ARO (March 2.45p3) and Spacewatch 1.8m (March 2.47p2)
K09C02A 2009 CA2 (arc=27 days, H=18.8 ~589m) from ARO (March 2.47-48p3)
K09C00T 2009 CT (arc=28 days, H=19.6 ~407m) from Mt. John Obs. (March 2.55p5)
Observations of small asteroids (H>22.0)
K09E00A 2009 EA (arc=1 day, H=26.4 ~18m) from ARO (March 2.40-41p3) and Mt. John Obs. (March 2.44p3)
K09D45N 2009 DN45 (arc=2 days, H=24.8 ~37m) from CSS (March 2.26-28p3)
K09D45D 2009 DD45 (arc=4 days, H=25.7 ~25m) from Mt. John Obs. (March 2.38-40p9), Kambah Obs. (March 2.41-43p2), SSS (March 2.42-46p22, 2.55p5, 2.63-67p19 & 2.72p5), and Great Shefford Obs. (March 2.99-03p9)
K09D43A 2009 DA43 (arc=4 days, H=24.6 ~41m) from Mt. John Obs. (March 2.50-51p3)
K09D36S 2009 DS36 (arc=5 days, H=25.8 ~23m) from Mt. John Obs. (March 2.48-49p4)
K09D00W 2009 DW (arc=13 days, H=26.0 ~21m) from ARO (March 2.42-47p6 at V=21.8-22.3)
K09C01T 2009 CT1 (arc=27 days, H=24.3 ~47m) from Spacewatch 1.8m (March 2.50-51p3)
K09B58M 2009 BM58 (Q=4.034 AU, arc=33 days, H=24.2 ~49m) from Spacewatch 1.8m (March 3.26-27p2)
K03W25P 2003 WP25 (arc=6 opp, H=24.2 ~49m) from CSS (March 2.45-52p8)
Observations of other objects
K09D46K 2009 DK46 (Q=4.033 AU, arc=2 days, H=18.0 ~851m) from Spacewatch 1.8m (March 2.30-31p3)
K09D45O 2009 DO45 (arc=2 days, H=18.7 ~616m) from CSS (March 2.25-28p4)
K09D45M 2009 DM45 (arc=5 days, H=21.3 ~186m) from SSS (March 1.41p1)
K09D04Q 2009 DQ4 (arc=11 days, H=21.0 ~214m) from Thompsonville Obs. (March 3.14-15p6)
K09D01L 2009 DL1 (arc=12 days, H=18.8 ~589m) from Iowa Robotic Obs. (March 2.24p1 & 2.28p1), LINEAR (March 2.34-40p5), ARO (March 2.44p3), and Mt. John Obs. (March 2.53-54p3)
K09D01D 2009 DD1 (arc=11 days, H=20.3 ~295m) from LINEAR (March 2.24-27p4)
K09C05O 2009 CO5 (arc=28 days, H=21.7 ~155m) from LINEAR (March 2.19-21p3)
K09C01W 2009 CW1 (arc=27 days, H=21.7 ~155m) from LINEAR (March 2.29-31p3)
K09B77D 2009 BD77 (arc=32 days, H=20.4 ~282m) from Thompsonville Obs. (March 3.12-13p6)
K09B71A 2009 BA71 (arc=2 opp, H=20.7 ~245m) from MLS (March 2.27-29p4)
K09B58P 2009 BP58 (arc=2 opp, H=18.7 ~616m) from CSS (March 2.18-20p3)
K09B11B 2009 BB11 (arc=35 days, H=19.3 ~467m) from CSS (March 1.35-37p4)
K09B02D 2009 BD2 (arc=41 days, H=17.6 ~1.02 km) from Spacewatch 0.9m (March 1.17-21p3)
K09A16D 2009 AD16 (Q=4.187 AU, arc=46 days, H=20.6 ~257m) from Mt. John Obs. (March 2.46p4)
K08U95C 2008 UC95 (arc=124 days, H=18.6 ~645m) from CSS (March 2.21-24p4)
K08R26S 2008 RS26 (Q=4.800 AU, arc=180 days, H=18.0 ~851m) from MLS (March 1.14-16p4)
K08L08W 2008 LW8 (arc=3 opp, H=17.3 ~1.17 km) from MLS (March 2.13-15p4)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.9 ~1.41 km) from Thompsonville Obs. (March 3.22-24p6)
K06SL7X 2006 SX217 (arc=3 opp, H=18.8 ~589m) from CSS (March 2.50-52p4)
K06S06D 2006 SD6 (arc=2 opp, H=20.2 ~309m) from Spacewatch 0.9m (March 2.41-44p3)
K06B10C 2006 BC10 (arc=3 opp, H=19.5 ~426m) from LINEAR (March 2.22-27p5) and Thompsonville Obs. (March 3.19-21p6)
K05E30M 2005 EM30 (i=53.1°, arc=3 opp, H=18.9 ~562m) from CSS (March 1.39-42p4)
K04E09U 2004 EU9 (arc=3 opp, H=18.9 ~562m) from Spacewatch 0.9m (March 2.22-26p3), LINEAR (March 2.28-33p4), and Thompsonville Obs. (March 3.09-10p6)
K02E03B 2002 EB3 (arc=5 opp, H=17.7 ~977m) from LINEAR (March 2.41-48p5)
K02C11T 2002 CT11 (i=53.9°, arc=5 opp, H=17.0 ~1.35 km) from CSS (March 2.38-41p4)
K00K44N 2000 KN44 (Q=4.248 AU, arc=2 opp, H=18.6 ~645m) from CSS (March 2.50-52p4)
J96B03Z 1996 BZ3 (Q=4.029 AU, arc=4 opp, H=18.3 ~741m) from Spacewatch 0.9m (March 2.41-44p3)
K6910 206910 2004 NL8 from LINEAR (March 2.34-40p5)
K3015 203015 1999 YF3 from MLS (March 1.15-17p4)
J8856 198856 2005 LR3 from CSS (March 1.46-48p4)
F3953 153953 2002 AD9 from CSS (March 2.26-28p4)
F2889 152889 2000 CF59 from CSS (March 2.32-34p4)
E1495 141495 2002 EZ11 from LINEAR (March 2.35-40p4)
D8883 138883 2000 YL29 from LINEAR (March 2.41-48p5) and MLS (March 2.50-52p3)
25916 25916 2001 CP44 from CSS (March 2.21-24p4)
22771 22771 1999 CU3 from LINEAR (March 2.28-32p5)
08566 8566 1996 EN from Spacewatch 0.9m (March 2.28-31p3) and LINEAR (March 2.33-39p5)
07822 7822 1991 CS from CSS (March 1.49-52p4)
07753 7753 1988 XB from Spacewatch 0.9m (March 2.29-32p3) and Spacewatch 1.8m (March 2.44-45p3)
04596 4596 1981 QB from MLS (March 1.30-32p4) and LINEAR (March 2.27-32p5)
04179 4179 Toutatis (1989 AC) from Tiana Obs. (Feb. 13.98-00p3 & 27.98-00p3), LINEAR (March 2.17-21p3), and Hamamatsu-Yuto Obs. (March 2.45-46p4)
03103 3103 Eger (1982 BB) from CSS (March 1.49-52p4)

Observers on 3 March '09

Nineteen observing facilities appeared in this day's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 12 in MPECs 2009-E15, 2009-E35, 2009-E36 & 2009-E37 -- 2009 EM1, 2009 EK1, 2009 EJ1, 2009 EA, 2009 DW, 2009 DV42, 2009 DL46, 2009 DL1, 2009 DE47, 2009 CV5, 2009 CB3, 2009 CA2
`703`	Catalina Sky Survey (CSS) in Arizona, 22 in MPECs 2009-E15, 2009-E16, 2009-E18, 2009-E23, 2009-E29, 2009-E32 & 2009-E37 -- 2009 EW, 2009 ER, 2009 EP, 2009 EM1, 2009 EF1, 2009 EC1, 2009 DO45, 2009 DN45, 2009 BP58, 2009 BB11, 2008 UC95, 2006 SX217, 2005 EM30, 2003 WP25, 2002 CT11, 2000 KN44, 25916, 198856, 153953, 152889, 7822, 3103
`F659`	Marco Micheli in Hawaii via Faulkes Telescope North in Hawaii, 1 in MPEC 2009-E16 -- 2009 EP
`J95`	Great Shefford Obs. in England, 4 in MPECs 2009-E15, 2009-E16, 2009-E18 & 2009-E23 -- 2009 EW, 2009 ER, 2009 EP, 2009 DD45
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2009-E15 -- 2009 DE47
`379`	Hamamatsu-Yuto Obs. in Japan, 2 in MPEC 2009-E15 -- 2009 DR3, 4179
`857`	Iowa Robotic Obs. in Arizona, 2 in MPEC 2009-E15 -- 2009 DV42, 2009 DL1
`415`	Kambah Obs. in the Australian Capital Territory, 1 in MPEC 2009-E15 -- 2009 DD45
`704`	LINEAR in New Mexico, 17 in MPECs 2009-E15, 2009-E26 & 2009-E30 -- 2009 EZ, 2009 ED1, 2009 DR3, 2009 DL1, 2009 DD1, 2009 CW1, 2009 CO5, 2006 BC10, 2004 EU9, 2002 EB3, 22771, 206910, 141495, 138883, 8566, 4596, 4179
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 14 in MPECs 2009-E16, 2009-E17, 2009-E18, 2009-E19, 2009-E20, 2009-E21, 2009-E22, 2009-E23, 2009-E25, 2009-E26, 2009-E29, 2009-E32, 2009-E33 & 2009-E37 -- 2009 EZ, 2009 EY, 2009 EW, 2009 EV, 2009 EU, 2009 ET, 2009 ES, 2009 ER, 2009 EQ, 2009 EP, 2009 EM1, 2009 EG1, 2009 EF1, 2009 EC1
`474`	Mt. John Obs. in New Zealand, 12 in MPECs 2009-E15, 2009-E31, 2009-E34 & 2009-E35 -- 2009 EJ1, 2009 EH1, 2009 EE1, 2009 EA, 2009 DZ42, 2009 DT43, 2009 DS36, 2009 DL1, 2009 DD45, 2009 DA43, 2009 CT, 2009 AD16
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 25 in MPECs 2009-E15, 2009-E16, 2009-E17, 2009-E18, 2009-E19, 2009-E20, 2009-E21, 2009-E22, 2009-E24, 2009-E25, 2009-E27, 2009-E28, 2009-E29, 2009-E30, 2009-E31, 2009-E33, 2009-E34 & 2009-E36 -- 2009 EY, 2009 EX, 2009 EV, 2009 EU, 2009 ET, 2009 ES, 2009 ER, 2009 EQ, 2009 EP, 2009 EK1, 2009 EH1, 2009 EG1, 2009 EE1, 2009 ED1, 2009 EC1, 2009 EB1, 2009 EA1, 2009 DV43, 2009 DB45, 2009 BA71, 2008 RS26, 2008 LW8, 203015, 138883, 4596
`854`	Sabino Canyon Obs. in Arizona, 8 in MPECs 2009-E16, 2009-E18, 2009-E23, 2009-E29, 2009-E30, 2009-E32, 2009-E33 & 2009-E37 -- 2009 EW, 2009 ER, 2009 EP, 2009 EM1, 2009 EG1, 2009 EF1, 2009 ED1, 2009 EC1
`E12`	Siding Spring Survey (SSS) in New South Wales, 3 in MPEC 2009-E15 -- 2009 DM45, 2009 DH39, 2009 DD45
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2009-E15 & 2009-E35 -- 2009 EJ1, 2009 BD2, 2006 SD6, 2004 EU9, 1996 BZ3, 8566, 7753
`291`	Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-E15, 2009-E17, 2009-E21, 2009-E22, 2009-E24, 2009-E28, 2009-E35 & 2009-E36 -- 2009 EX, 2009 EV, 2009 EU, 2009 EQ, 2009 EK1, 2009 EJ1, 2009 EB1, 2009 DL46, 2009 DK46, 2009 DC43, 2009 CT1, 2009 CR4, 2009 CB3, 2009 BM58, 7753
`611`	Starkenburg Obs. in Germany, 1 in MPEC 2009-E37 -- 2009 EM1
`H53`	Thompsonville Obs. in Illinois, 6 in MPEC 2009-E15 -- 2009 DR3, 2009 DQ4, 2009 BD77, 2006 WZ2, 2006 BC10, 2004 EU9
`B89`	Tiana Obs., 1 in MPEC 2009-E15 -- 4179

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

Impact Risk Monitoring on 3 March '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2359 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 EJ1	JPL Sentry	1901	2036-2086	9	5.9e-09	-9.78	-9.98	0	JPL: "Analysis based on 21 observations spanning .32485 days (2009-Mar-03.27933 to 2009-Mar-03.60418)." Diameter approximately 0.008 km. from mean, weighted H=28.2.

2009 EH1	JPL Sentry	1930	2048-2076	7	2.2e-08	-8.94	-9.08	0	JPL: "Analysis based on 18 observations spanning .32144 days (2009-Mar-03.25773 to 2009-Mar-03.57917)." Diameter approximately 0.009 km. from mean, weighted H=27.8.

2009 EE1	JPL Sentry	1700	2072	1	1.4e-10	-10.20	-10.2	0	JPL: "Analysis based on 19 observations spanning .29351 days (2009-Mar-03.25773 to 2009-Mar-03.55124)." Diameter approximately 0.028 km. from mean, weighted H=25.4.

2009 EW	JPL Sentry	1700	2063-2081	17	1.7e-05	-5.47	-5.64	0	JPL: "Analysis based on 22 observations spanning 1.0561 days (2009-Mar-02.29194 to 2009-Mar-03.348)." Diameter approximately 0.019 km. from mean, weighted H=26.3.

2009 EV	JPL Sentry	1630	2011-2090	74	1.8e-08	-4.28	-4.73	0	JPL: "Analysis based on 13 observations spanning .88685 days (2009-Mar-02.26506 to 2009-Mar-03.15191)." Diameter approximately 0.359 km. from mean, weighted H=19.9.

2009 ES	JPL Sentry	1630	2026-2098	20	2.9e-08	-4.92	-5.22	0	JPL: "Analysis based on 14 observations spanning 1.0041 days (2009-Mar-02.21182 to 2009-Mar-03.21594)." Diameter approximately 0.320 km. from mean, weighted H=20.1.

2009 DE47	JPL Sentry	1600	R E M O V E D						JPL: Risk listing removed at 1031 UTC.

2009 DL46	JPL Sentry	1600	2072	1	1.0e-10	-8.60	-8.60	0	JPL: "Analysis based on 28 observations spanning 2.0028 days (2009-Feb-28.41984 to 2009-Mar-02.422627)." Diameter approximately 0.170 km. from mean, weighted H=21.5.

2009 DC43	NEODyS	1600	2070	1	4.94e-11	-6.76	-6.76	0	NEODyS: "Based on 39 optical observations (of which 0 are rejected as outliers) from 2009/02/26.500 to 2009/03/02.389."
2009 DC43	JPL Sentry	1600	R E M O V E D						JPL: Risk listing removed at 0951 UTC.

2009 DZ42	JPL Sentry	1600	2073	1	5.7e-09	-5.77	-5.77	0	JPL: "Analysis based on 49 observations spanning 4.3018 days (2009-Feb-26.12849 to 2009-Mar-02.43025)." Diameter approximately 0.410 km. from mean, weighted H=19.6.
2009 DZ42	NEODyS	1600	2073	1	1.26e-09	-6.45	-6.45	0	NEODyS: "Based on 49 optical observations (of which 0 are rejected as outliers) from 2009/02/26.129 to 2009/03/02.431."

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 3 March '09

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

2359	Grabbed MPEC 2009-E36 - 2009 EK1 - see above Grabbed MPEC 2009-E37 - 2009 EM1 - see above
1930	Noted that JPL Sentry has posted 2009 EH1 as an impact risk - see above
1901	Noted that JPL Sentry has posted 2009 EJ1 as an impact risk - see above
1732	Grabbed MPEC 2009-E34 - 2009 EH1 - see above Grabbed MPEC 2009-E35 - 2009 EJ1 - see above
1700	Noted that JPL Sentry has posted 2009 EE1 as an impact risk - see above Noted that JPL Sentry has posted 2009 EW as an impact risk - see above
1630	Noted that JPL Sentry has posted 2009 ES as an impact risk - see above Noted that JPL Sentry has posted 2009 EV as an impact risk - see above
1600	Noted that JPL Sentry has removed 2009 DC43 as an impact risk - see above Noted that NEODyS has updated its 2009 DC43 risk assessment - see above Noted that JPL Sentry has removed 2009 DE47 as an impact risk - see above Noted that JPL Sentry has updated its 2009 DL46 risk assessment - 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 Grabbed MPEC 2009-E15 - Daily Orbit Update - see above Grabbed MPEC 2009-E16 - 2009 EP - see above Grabbed MPEC 2009-E17 - 2009 EQ - see above Grabbed MPEC 2009-E18 - 2009 ER - see above Grabbed MPEC 2009-E19 - 2009 ES - see above Grabbed MPEC 2009-E20 - 2009 ET - see above Grabbed MPEC 2009-E21 - 2009 EU - see above Grabbed MPEC 2009-E22 - 2009 EV - see above Grabbed MPEC 2009-E23 - 2009 EW - see above Grabbed MPEC 2009-E24 - 2009 EX - see above Grabbed MPEC 2009-E25 - 2009 EY - see above Grabbed MPEC 2009-E26 - 2009 EZ - see above Grabbed MPEC 2009-E27 - 2009 EA1 - see above Grabbed MPEC 2009-E28 - 2009 EB1 - see above Grabbed MPEC 2009-E29 - 2009 EC1 - see above Grabbed MPEC 2009-E30 - 2009 ED1 - see above Grabbed MPEC 2009-E31 - 2009 EE1 - see above Grabbed MPEC 2009-E32 - 2009 EF1 - see above Grabbed MPEC 2009-E33 - 2009 EG1 - see above

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