2009-03-07 Tracking News

Contents on 7 March '09

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- six MPECs
Observers -- 56 observing facilities
Impact Risk Monitoring -- two 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 7 March '09

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2359 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 four 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 7 March '09

Minor Planet Electronic Circulars

As of last check at 2359 UTC, there have been six MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-E42 time-stamped "07:11 UT" - Daily Orbit Update - see below
MPEC 2009-E43 time-stamped "14:48 UT" - Comet C/2009 B2 (LINEAR) - see below
MPEC 2009-E44 time-stamped "15:00 UT" - Observations of Comets - see below
MPEC 2009-E45 time-stamped "16:05 UT" - 2009 EN2 - see below
MPEC 2009-E46 time-stamped "16:07 UT" - 2009 EO2 - see below
MPEC 2009-E47 time-stamped "19:56 UT" - 2009 EP2

MPEC 2009-E47 - "19:56 UT" - 2009 EP2

K09E02P 2009 EP2 (H=21.4 ~178m) was discovered at 1540 UT on 5 March by the Siding Spring Survey (SSS), which observed it at March 5.65-69p4, 5.76-77p5, 6.55p5, 6.67-71p4, and 7.62p5. The discovery was confirmed by Mt. John Obs. (March 7.36p5 & 7.51p4) and Sabino Canyon Obs. (March 7.38p3).

MPEC 2009-E46 - "16:07 UT" - 2009 EO2

K09E02O 2009 EO2 (Earth MOID=5.6 LD, H=19.5 ~426m) was discovered at 0941 UT on 5 March by SSS, which observed it at March 5.40-42p3, 5.47-49p3, 6.40p3, and 7.41p2. The discovery was confirmed by Mt. John Obs. (March 7.37-38p5 & 7.48-49p3).

MPEC 2009-E45 - "16:05 UT" - 2009 EN2

K09E02N 2009 EN2 (risk-listed, i=46.6°, H=18.0 ~851m) was discovered at 1232 UT on 3 March by the Catalina Sky Survey (CSS), which observed it at March 3.52-53p6. The discovery was confirmed by Great Shefford Obs. (March 6.13-17p4), Sabino Canyon Obs. (March 7.44p1), and the Mt. Lemmon Survey (MLS) (March 7.49-52p8).

MPEC 2009-E44 - "15:00 UT" - Observations of Comets

PK08Y030 P/2008 Y3 (McNaught) from SSS (Feb. 28.57p1) and Mt. John Obs. (March 3.46p4)
PK08Y020 P/2008 Y2 (Gibbs) from LINEAR (March 1.26-30p5) and Tzec Maun Obs. Mayhill (March 5.28-29p3)
CK08X030 C/2008 X3 (LINEAR) from SSS (Feb. 21.73p1) and Mt. John Obs. (March 2.47p3 & 4.40-42p5)
PK08W96Z P/2008 WZ96 (LINEAR) from Altamira Obs. (Feb. 21.88-89p2 & 23.88-89p3)
CK08T020 C/2008 T2 (Cardinal) from Maidbronn Obs. (Feb. 17.82-83p5), Altamira Obs. (Feb. 21.93-95p3), Skylive Obs. (March 2.82-83p4), La Vara Obs. (March 2.85p3), and Monte Deva Obs. (March 2.89-90p5)
CK08F75K C/2008 FK75 (Lemmon-Siding Spring) from La Dehesilla Obs. (Feb. 26.20-21p2), Tzec Maun Obs. Mayhill (March 2.48p2), and LINEAR (March 3.39-43p5)
CK08A010 C/2008 A1 (McNaught) from Chante-Perdrix Obs. (Feb. 22.18p1) and Altamira Obs. (Feb. 24.28-29p2)
CK07T050 C/2007 T5 (Gibbs) from Tzec Maun Obs. Mayhill (Feb. 23.44-45p3) and CSS (March 2.35-38p3)
CK07S020 C/2007 S2 (Lemmon) from CSS (March 1.31-34p4), Moriyama Obs. (March 1.65-66p2), and Tzec Maun Obs. Mayhill (March 5.30-31p3)
CK07Q030 C/2007 Q3 (Siding Spring) from Altamira Obs. (Feb. 21.95-96p3), Auckland Obs. (Feb. 23.36p3), AAAA Buenos Aires Obs. (Feb. 24.04-08p3 & 25.02-06p3), Grove Creek Obs. (March 2.44p3), and Mt. John Obs. (March 3.43p3)
CK07N030 C/2007 N3 (Lulin) from JiangNanTianChi Obs. (Jan. 30.85-89p4), Tiana Obs. (Feb. 21.01p3 & 28.01p3), Auckland Obs. (Feb. 23.39p2, 23.44p2 & March 2.45p3), Moriyama Obs. (March 2.48-49p2), Chante-Perdrix Obs. (March 2.77p1 & 2.90-91p5), Siegen Obs. (March 2.86-87p3), La Vara Obs. (March 2.99p3), Purple Mtn. Obs. XuYi Station (XuYi Sta.) (March 3.58-61p4), Borken Obs. (March 3.87-88p3), Beta Orionis Obs. (March 4.00p4), Cordell-Lorenz Obs. (March 5.19-24p4 & 6.08-13p4), Montcabre Obs. (March 5.82p3), Gualba Obs. (March 5.83-84p2), Malaga Obs. (March 5.89-93p3), Isle of Man Obs. (March 5.96-97p5), and San Vito Obs. (March 6.95-96p3)
CK07M020 C/2007 M2 (Catalina) from Auckland Obs. (Feb. 23.38p3), Mt. John Obs. (March 4.39p4), and Kambah Obs. (March 6.63-64p2)
CK07G010 C/2007 G1 (LINEAR) from Auckland Obs. (Feb. 23.37p3), Kambah Obs. (Feb. 26.45p2), Mt. John Obs. (March 3.40-42p4 & 7.46-47p5), and North Ryde Obs. (March 5.45-48p2)
CK07D010 C/2007 D1 (LINEAR) from La Dehesilla Obs. (Feb. 26.12-13p2), the Spacewatch 0.9m telescope (Feb. 26.36-40p3), and Tzec Maun Obs. Mayhill (March 5.33p1)
CK06U060 C/2006 U6 (Spacewatch) from SSS (Feb. 22.72p1), Mt. John Obs. (March 4.43-45p6), and Los Molinos Obs. (March 7.17-19p3)
CK06Q010 C/2006 Q1 (McNaught) from Terskol Obs. (Feb. 19.10-11p6), Altamira Obs. (Feb. 23.23p3), Petit Jean Mtn. South Obs. (PJMSO) (March 4.47-48p6), Isle of Man Obs. (March 6.09-10p3), and Masquefa Obs. (March 7.12-13p3)
CK06O02F C/2006 OF2 (Broughton) from Terskol Obs. (Feb. 18.84-85p8), Szeged Obs. (Feb. 19.81-82p2), Alginet Obs. (Feb. 21.81-82p3), Altamira Obs. (Feb. 21.97-98p3 & 23.95-96p3), Los Altos de Arguineguin Obs. (Feb. 23.87-88p3 & 27.90-92p3), New Millennium Obs. (Feb. 23.96-98p4 & 25.92-96p4), Ingenio Obs. (Feb. 28.99p4), Monte Deva Obs. (March 2.94-96p5), La Vara Obs. (March 2.96p3), Vicksburg Obs. (March 3.09-11p3 & 4.09-11p3), Banyoles Obs. (March 6.79-80p3), and Masquefa Obs. (March 6.93-94p3)
CK06K040 C/2006 K4 (NEAT) from El Leoncito Obs. (Feb. 23.09-10p3), Mt. John Obs. (March 3.44-45p2), and Kambah Obs. (March 6.65-66p2)
PK05SL6B P/2005 SB216 (LONEOS) from Schiaparelli Obs. (Feb. 24.10p1) and Tzec Maun Obs. Mayhill (March 5.32p3)
CK05L030 C/2005 L3 (McNaught) from Terskol Obs. (Feb. 19.08-10p5), Isle of Man Obs. (March 6.06p4), and Masquefa Obs. (March 7.11p3)
0214P 214P/LINEAR from Farm Cove Obs. (Feb. 3.60-62p2) and Altamira Obs. (Feb. 24.26-28p3)
0210P 210P/Christensen from Terskol Obs. (Feb. 19.11-12p6) and Altamira Obs. (Feb. 23.21-22p3 & 24.24-25p3)
0201P 201P/LONEOS from Schiaparelli Obs. (Feb. 23.99p1 & 24.17p1) and MLS (Feb. 24.34-36p4 & March 2.34-36p4)
0144P 144P/Kushida from Terskol Obs. (Feb. 18.81-83p6), Szeged Obs. (Feb. 19.83-84p2), Alginet Obs. (Feb. 21.80-81p3), Altamira Obs. (Feb. 21.96-97p2 & 23.92-94p4), New Millennium Obs. (Feb. 25.92-96p4), Ingenio Obs. (March 1.00p4), Isle of Man Obs. (March 1.99p3), Chante-Perdrix Obs. (March 2.78p1), Siegen Obs. (March 2.83-84p2), Monte Deva Obs. (March 2.90-91p5), La Vara Obs. (March 2.91p3), Vicksburg Obs. (March 3.06-07p3 & 4.07-08p2), and Masquefa Obs. (March 6.91-93p3)
0116P 116P/Wild 4 from Terskol Obs. (Feb. 18.87-88p4), Szeged Obs. (Feb. 19.93-94p2), Altamira Obs. (Feb. 22.03-04p3 & 24.07p3), New Millennium Obs. (Feb. 23.98-99p4 & 25.93-97p4), Isle of Man Obs. (March 1.00p3), LINEAR (March 2.22-27p5), Auckland Obs. (March 2.47p2), La Vara Obs. (March 2.94-95p3), Borken Obs. (March 3.89-90p2), Vicksburg Obs. (March 4.18-21p3), Montcabre Obs. (March 5.87p3), Banyoles Obs. (March 5.88p1), and Masquefa Obs. (March 6.95-97p3)
0077P 77P/Longmore from Altamira Obs. (Feb. 23.17-19p3), New Millennium Obs. (Feb. 25.94-98p4), Isle of Man Obs. (March 2.02p3), Borken Obs. (March 3.07-09p3), CSS (March 3.33-36p4), PJMSO (March 4.42-43p5), Paus Obs. (March 5.02p2), Montcabre Obs. (March 7.03-04p3), and Masquefa Obs. (March 7.05-06p3)
0074P 74P/Smirnova-Chernykh from Szeged Obs. (Feb. 19.91-92p2), Altamira Obs. (Feb. 22.01-02p3), New Millennium Obs. (Feb. 23.97-99p4 & 25.97p2), Isle of Man Obs. (March 2.01p3), Auckland Obs. (March 2.46-47p3), and Vicksburg Obs. (March 4.23-26p3)
0067P 67P/Churyumov-Gerasimenko from Terskol Obs. (Feb. 15.69-70p9), Szeged Obs. (Feb. 19.76-77p2), Altamira Obs. (Feb. 21.86-87p3), and La Vara Obs. (March 2.82-83p3)
0065P 65P/Gunn from Szeged Obs. (Feb. 19.96-97p2), Altamira Obs. (Feb. 24.22-23p3), New Millennium Obs. (Feb. 25.94p2), LINEAR (March 1.38-42p5), Isle of Man Obs. (March 2.03p3), Tzec Maun Obs. Mayhill (March 2.44-45p3), La Vara Obs. (March 2.97-98p3), PJMSO (March 4.41-42p5), Montcabre Obs. (March 7.05-06p3), and Masquefa Obs. (March 7.07-08p3)
0059P 59P/Kearns-Kwee from Altamira Obs. (Feb. 21.92-93p3) and Isle of Man Obs. (March 1.98p1)
0033P 33P/Daniel from Cantabria Obs. (Feb. 25.83-87p3), Tzec Maun Obs. Mayhill (March 1.41p2, 2.42-43p3, 5.26-27p3 & 6.32-33p3), PJMSO (March 4.39-40p4), Paus Obs. (March 4.99p1), and Montcabre Obs. (March 6.93p3)
0029P 29P/Schwassmann-Wachmann 1 from Terskol Obs. (Feb. 18.86-87p4), Szeged Obs. (Feb. 19.89-90p2), Alginet Obs. (Feb. 21.79-80p3), Altamira Obs. (Feb. 21.99-00p3 & 23.97-99p3), New Millennium Obs. (Feb. 23.97-98p4 & 25.92-96p4), Cantabria Obs. (Feb. 25.82p2), Ingenio Obs. (March 1.03-04p4), Isle of Man Obs. (March 2.00-01p3), Auckland Obs. (March 2.46p3), Chante-Perdrix Obs. (March 2.76p1 & 2.86p2), La Vara Obs. (March 2.92-93p3), Vicksburg Obs. (March 3.16-17p3 & 4.13-16p3), Borken Obs. (March 3.85-86p2), Gualba Obs. (March 5.82-83p2), and Montcabre Obs. (March 5.94-95p3)
0022P 22P/Kopff from Terskol Obs. (Feb. 20.06-08p3) and Altamira Obs. (Feb. 23.24-25p3)
0019P 19P/Borrelly from Altamira Obs. (Feb. 23.20-21p3), Tzec Maun Obs. Mayhill (March 2.46-47p3), Paus Obs. (March 5.01p2), and Montcabre Obs. (March 6.98-99p3)
0017P 17P/Holmes from Altamira Obs. (Feb. 24.01-03p4) and La Vara Obs. (March 2.89-90p2)
0010P 10P/Tempel 2 from MLS (March 1.42-44p4) and CSS (March 3.32p2)

MPEC 2009-E43 - "14:48 UT" - Comet C/2009 B2 (LINEAR)

CK09B020 C/2009 B2 (LINEAR) (i=156.9°, q=2.328 AU, Q=87.610 AU, TP=2009 Mar. 7.5556 TT) from North Ryde Obs. (March 2.53p2) and Mt. John Obs. (March 3.69p3)

<< DOU on 7 Mar. '09 >> MPEC 2009-E42 - "07:11 UT" - Daily Orbit Update

Observations of risk-listed objects
K09E00W 2009 EW (small asteroid, arc=4 days, H=26.4 ~18m) from Great Shefford Obs. (March 6.04-12p8)
Observations of recently (no longer) risk-listed objects
K09D01M 2009 DM1 (Q=4.747 AU, arc=2 opp, H=17.1 ~1.29 km) from the Spacewatch 1.8m telescope (2003 Nov. 21.12p3) and MLS (2008 May 30.39-41p4)
Observations of small asteroids (H>22.0)
K09E01F 2009 EF1 (arc=3 days, H=24.2 ~49m) from Great Shefford Obs. (March 5.98-99p2)
K09E00A 2009 EA (arc=5 days, H=26.5 ~17m) from Great Shefford Obs. (March 6.18-19p3)
K08G02G 2008 GG2 (arc=2 opp, H=22.7 ~98m) from Rob McNaught via Australian Natl. Univ. 1m telescope (ANU 1m) (2004 March 30.65-66p6)
K06M01Y 2006 MY1 (arc=81 days, H=22.2 ~123m) from MLS (2006 April 7.30-32p4 & 2006 April 19.22-26p4)
K04P00J 2004 PJ (arc=71 days, H=22.8 ~93m) from the Sloan Digital Sky Survey (SDSS) (2004 June 14.19p2)
K02Q47E 2002 QE47 (arc=2 opp, H=22.2 ~123m) from Spacewatch 0.9m (2007 Dec. 17.41-45p3) and MLS (2007 Dec. 30.21-23p4 at V=21.3-22.4)
Observations of other objects
K09D04Q 2009 DQ4 (arc=11 days, H=21.0 ~214m) from Grove Creek Obs. (March 6.65p3)
K09B81J 2009 BJ81 (arc=121 days, H=18.4 ~708m) from Spacewatch 0.9m (2008 Oct. 30.49-51p3)
K09B58C 2009 BC58 (arc=2 opp, H=18.8 ~589m) from Marc W. Buie via Kitt Peak Natl. Obs. (KPNO) (2002 Feb. 7.33p1 & 2002 Feb. 7.42p1)
K08E05Y 2008 EY5 (q=0.234 AU, arc=2 opp, H=20.1 ~323m) from SSS (March 6.51-53p4)
K08CH5C 2008 CC175 (arc=2 opp, H=21.4 ~178m) from Spacewatch 1.8m (2007 Jan. 27.25-26p3)
K07VO3M 2007 VM243 (arc=2 opp, H=21.0 ~214m) from Spacewatch 0.9m (2008 Sept. 23.18-22p3)
K07F03D 2007 FD3 (arc=32 days, H=20.0 ~339m) from Greiner Research Obs. (GRO) (2007 April 6.34p1)
K07D08K 2007 DK8 (arc=2 opp, H=19.0 ~537m) from SSS (2007 Sept. 6.62-64p4)
K06K40A 2006 KA40 (arc=2 opp, H=19.6 ~407m) from Spacewatch 0.9m (1999 Nov. 15.14-19p3)
K06G02Q 2006 GQ2 (arc=3 opp, H=18.0 ~851m) from Spacewatch 0.9m (March 3.49-52p3)
K05GB9W 2005 GW119 (arc=4 opp, H=18.5 ~676m) from Spacewatch 0.9m (March 3.27-30p3)
K04P02M 2004 PM2 (arc=2 opp, H=19.3 ~467m) from Spacewatch 1.8m (2008 June 2.26-27p3 & 2008 June 6.43p2)
K03W25X 2003 WX25 (Q=4.606 AU, arc=2 opp, H=18.6 ~645m) from CSS (2008 Oct. 9.33-35p4)
K01C32K 2001 CK32 (arc=2 opp, H=18.9 ~562m) from New Millennium Obs. (Feb. 27.81-86p6)
K00S20T 2000 ST20 (arc=4 opp, H=19.1 ~513m) from Spacewatch 0.9m (March 3.22-26p3)
K00GC7U 2000 GU127 (arc=6 opp, H=18.5 ~676m) from Spacewatch 0.9m (March 3.27-30p3)
K00B19H 2000 BH19 (arc=3 opp, H=19.5 ~426m) from SDSS (2000 May 5.26p2)
J94R00C 1994 RC (arc=187 days, H=19.0 ~537m) from Spacewatch 0.9m (1994 April 7.16-18p3 & 1994 April 7.24-25p3)
K6910 206910 2004 NL8 from Zadko Obs. (Feb. 27.73-77p2) and Spacewatch 0.9m (March 3.33-36p3)
G2900 162900 2001 HG31 from New Millennium Obs. (Feb. 27.85-90p4)
A1873 101873 1999 NC5 from New Millennium Obs. (Feb. 27.84-89p6)
89355 89355 2001 VS78 from New Millennium Obs. (Feb. 27.83-88p6)
85990 85990 1999 JV6 from CSS (March 3.33-37p4)
52762 52762 1998 MT24 from New Millennium Obs. (Feb. 27.82-86p6)
35107 35107 1991 VH from New Millennium Obs. (Feb. 27.83-88p6)
22771 22771 1999 CU3 from Spacewatch 0.9m (March 3.15-19p3)
22753 22753 1998 WT from New Millennium Obs. (Feb. 27.86-90p6)
16834 16834 1997 WU22 from SSS (March 6.51-54p4)
12711 12711 Tukmit (1991 BB) from New Millennium Obs. (Feb. 27.82-87p6)
10302 10302 1989 ML from CSS (March 3.25-27p4)
08176 8176 1991 WA from CSS (March 3.44-46p4)
07753 7753 1988 XB from Spacewatch 1.8m (March 3.23p3)
07480 7480 Norwan (1994 PC) from CSS (March 3.25-27p4)
07358 7358 Oze (1995 YA3) from New Millennium Obs. (Feb. 27.85-89p6)
06053 6053 1993 BW3 from SSS (March 6.57-59p3)
05604 5604 1992 FE from SSS (March 6.72-74p4)
03551 3551 Verenia (1983 RD) from Spacewatch 0.9m (March 3.28-31p3)
01864 1864 Daedalus (1971 FA) from New Millennium Obs. (Feb. 27.84-88p5)
01863 1863 Antinous (1948 EA) from CSS (March 3.16-17p4)

Observers on 7 March '09

A total of 56 observing facilities appear in today's MPECs.

Code	Observer / observatory
`834`	AAAA Buenos Aires Obs. in Argentina, 1 in MPEC 2009-E44 -- C/2007 Q3
`J97`	Alginet Obs. in Spain, 3 in MPEC 2009-E44 -- C/2006 OF2, 144P, 29P
`J24`	Altamira Obs. in Spain, 19 in MPEC 2009-E44 -- P/2008 WZ96, C/2008 T2, C/2008 A1, C/2007 Q3, C/2006 Q1, C/2006 OF2, 214P, 210P, 144P, 116P, 77P, 74P, 67P, 65P, 59P, 29P, 22P, 19P, 17P
`467`	Auckland Obs. in New Zealand, 7 in MPEC 2009-E44 -- C/2007 Q3, C/2007 N3, C/2007 M2, C/2007 G1, 116P, 74P, 29P
`4131`	Rob McNaught via Australian Natl. Univ. 1m telescope in New South Wales, 1 in MPEC 2009-E42 -- 2008 GG2
`B87`	Banyoles Obs. in Spain, 2 in MPEC 2009-E44 -- C/2006 OF2, 116P
`I32`	Beta Orionis Obs. in Argentina, 1 in MPEC 2009-E44 -- C/2007 N3
`B59`	Borken Obs. in Germany, 4 in MPEC 2009-E44 -- C/2007 N3, 116P, 77P, 29P
`J96`	Cantabria Obs. in Spain, 2 in MPEC 2009-E44 -- 33P, 29P
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2009-E42, 2009-E44 & 2009-E45 -- 2009 EN2, C/2007 T5, C/2007 S2, 2003 WX25, 85990, 10302, 8176, 7480, 1863, 77P, 10P
`A77`	Chante-Perdrix Obs. in France, 4 in MPEC 2009-E44 -- C/2008 A1, C/2007 N3, 144P, 29P
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-E44 -- C/2007 N3
`808`	El Leoncito Obs. in Argentina, 1 in MPEC 2009-E44 -- C/2006 K4
`E85`	Farm Cove Obs. in New Zealand, 1 in MPEC 2009-E44 -- 214P
`J95`	Great Shefford Obs. in England, 4 in MPECs 2009-E42 & 2009-E45 -- 2009 EW, 2009 EN2, 2009 EF1, 2009 EA
`H51`	Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-E42 -- 2007 FD3
`E16`	Grove Creek Obs. in New South Wales, 2 in MPECs 2009-E42 & 2009-E44 -- 2009 DQ4, C/2007 Q3
`442`	Gualba Obs. in Spain, 2 in MPEC 2009-E44 -- C/2007 N3, 29P
`J39`	Ingenio Obs. in the Canary Islands, 3 in MPEC 2009-E44 -- C/2006 OF2, 144P, 29P
`987`	Isle of Man Obs. on the Isle of Man, 10 in MPEC 2009-E44 -- C/2007 N3, C/2006 Q1, C/2005 L3, 144P, 116P, 77P, 74P, 65P, 59P, 29P
`D32`	JiangNanTianChi Obs. in China, 1 in MPEC 2009-E44 -- C/2007 N3
`415`	Kambah Obs. in the Australian Capital Territory, 3 in MPEC 2009-E44 -- C/2007 M2, C/2007 G1, C/2006 K4
`6951`	Marc W. Buie via Kitt Peak Natl. Obs. in Arizona, 1 in MPEC 2009-E42 -- 2009 BC58
`704`	LINEAR in New Mexico, 4 in MPEC 2009-E44 -- P/2008 Y2, C/2008 FK75, 116P, 65P
`212`	La Dehesilla Obs. in Spain, 2 in MPEC 2009-E44 -- C/2008 FK75, C/2007 D1
`J38`	La Vara Obs. in Spain, 9 in MPEC 2009-E44 -- C/2008 T2, C/2007 N3, C/2006 OF2, 144P, 116P, 67P, 65P, 29P, 17P
`J55`	Los Altos de Arguineguin Obs. in the Canary Islands, 1 in MPEC 2009-E44 -- C/2006 OF2
`844`	Los Molinos Obs. in Uruguay, 1 in MPEC 2009-E44 -- C/2006 U6
`B82`	Maidbronn Obs. in Germany, 1 in MPEC 2009-E44 -- C/2008 T2
`J40`	Malaga Obs. in Spain, 1 in MPEC 2009-E44 -- C/2007 N3
`232`	Masquefa Obs. in Spain, 7 in MPEC 2009-E44 -- C/2006 Q1, C/2006 OF2, C/2005 L3, 144P, 116P, 77P, 65P
`213`	Montcabre Obs. in Spain, 7 in MPEC 2009-E44 -- C/2007 N3, 116P, 77P, 65P, 33P, 29P, 19P
`945`	Monte Deva Obs. in Spain, 3 in MPEC 2009-E44 -- C/2008 T2, C/2006 OF2, 144P
`900`	Moriyama Obs. in Japan, 2 in MPEC 2009-E44 -- C/2007 S2, C/2007 N3
`474`	Mt. John Obs. in New Zealand, 10 in MPECs 2009-E43, 2009-E44, 2009-E46 & 2009-E47 -- 2009 EP2, 2009 EO2, C/2009 B2, P/2008 Y3, C/2008 X3, C/2007 Q3, C/2007 M2, C/2007 G1, C/2006 U6, C/2006 K4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2009-E42, 2009-E44 & 2009-E45 -- 2009 EN2, 2009 DM1, 2006 MY1, 2002 QE47, 201P, 10P
`A24`	New Millennium Obs. in Italy, 17 in MPECs 2009-E42 & 2009-E44 -- C/2006 OF2, 2001 CK32, 89355, 52762, 35107, 22753, 162900, 12711, 101873, 7358, 1864, 144P, 116P, 77P, 74P, 65P, 29P
`423`	North Ryde Obs. in New South Wales, 2 in MPECs 2009-E43 & 2009-E44 -- C/2009 B2, C/2007 G1
`B49`	Paus Obs. in Spain, 3 in MPEC 2009-E44 -- 77P, 33P, 19P
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2009-E44 -- C/2006 Q1, 77P, 65P, 33P
`D29`	Purple Mtn. Obs. XuYi Station in China, 1 in MPEC 2009-E44 -- C/2007 N3
`854`	Sabino Canyon Obs. in Arizona, 2 in MPECs 2009-E45 & 2009-E47 -- 2009 EP2, 2009 EN2
`233`	San Vito Obs. in Italy, 1 in MPEC 2009-E44 -- C/2007 N3
`204`	Schiaparelli Obs. in Italy, 2 in MPEC 2009-E44 -- P/2005 SB216, 201P
`E12`	Siding Spring Survey (SSS) in New South Wales, 10 in MPECs 2009-E42, 2009-E44, 2009-E46 & 2009-E47 -- 2009 EP2, 2009 EO2, P/2008 Y3, C/2008 X3, 2008 EY5, 2007 DK8, C/2006 U6, 16834, 6053, 5604
`510`	Siegen Obs. in Germany, 2 in MPEC 2009-E44 -- C/2007 N3, 144P
`B40`	Skylive Obs. in Italy, 1 in MPEC 2009-E44 -- C/2008 T2
`645`	Sloan Digital Sky Survey (SDSS) in New Mexico, 2 in MPEC 2009-E42 -- 2004 PJ, 2000 BH19
`691`	Spacewatch 0.9m telescope in Arizona, 13 in MPECs 2009-E42 & 2009-E44 -- 2009 BJ81, 2007 VM243, C/2007 D1, 2006 KA40, 2006 GQ2, 2005 GW119, 2002 QE47, 2000 ST20, 2000 GU127, 1994 RC, 22771, 206910, 3551
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2009-E42 -- 2009 DM1, 2008 CC175, 2004 PM2, 7753
`629`	Szeged Obs. in Hungary, 7 in MPEC 2009-E44 -- C/2006 OF2, 144P, 116P, 74P, 67P, 65P, 29P
`B18`	Terskol Obs. in Russia, 9 in MPEC 2009-E44 -- C/2006 Q1, C/2006 OF2, C/2005 L3, 210P, 144P, 116P, 67P, 29P, 22P
`B89`	Tiana Obs. in Spain, 1 in MPEC 2009-E44 -- C/2007 N3
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 9 in MPEC 2009-E44 -- P/2008 Y2, C/2008 FK75, C/2007 T5, C/2007 S2, C/2007 D1, P/2005 SB216, 65P, 33P, 19P
`H47`	Vicksburg Obs. in Mississippi, 5 in MPEC 2009-E44 -- C/2006 OF2, 144P, 116P, 74P, 29P
`D20`	Zadko Obs. in Western Australia, 1 in MPEC 2009-E42 -- 206910

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

Impact Risk Monitoring on 7 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 EN2	JPL Sentry	1804	2022-2106	16	4.1e-09	-4.29	-4.68	0	JPL: "Analysis based on 19 observations spanning 3.9985 days (2009-Mar-03.52237 to 2009-Mar-07.52091)." Diameter approximately 0.925 km. from mean, weighted H=17.8.

2009 EW	JPL Sentry	1703	2075	1	4.9e-07	-7.06	-7.06	0	JPL: "Analysis based on 53 observations spanning 3.8331 days (2009-Mar-02.29194 to 2009-Mar-06.124991)." Diameter approximately 0.018 km. from mean, weighted H=26.4.
2009 EW	NEODyS	1624	2075-2081	2	5.29e-07	-7.03	-7.05	0	NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2009/03/02.293 to 2009/03/06.126."

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 7 March '09

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

2100	Grabbed MPEC 2009-E47 - 2009 EP2 - see above
1804	Noted that JPL Sentry has posted 2009 EN2 as an impact risk - see above
1703	Noted that JPL Sentry has updated its 2009 EW risk assessment - see above
1624	Noted that NEODyS has updated its 2009 EW risk assessment - see above
1623	Grabbed MPEC 2009-E42 - Daily Orbit Update - see above Grabbed MPEC 2009-E43 - Comet C/2009 B2 (LINEAR) - see above Grabbed MPEC 2009-E44 - Observations of Comets - see above Grabbed MPEC 2009-E45 - 2009 EN2 - see above Grabbed MPEC 2009-E46 - 2009 EO2 - see above

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