2009-05-04 Tracking News

Contents on 4 May '09

IAU Minor Planet Center
- NEOCP Activity -- three listings: 1 new, 2 updated
- New MPECs -- ten MPECs
Observers -- 62 observing facilities
Impact Risk Monitoring -- four 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 May '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 seven 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 at Suno Observatory by Birtwhistle et al.

New MPECs on 4 May '09

Minor Planet Electronic Circulars

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

MPEC 2009-J14 time-stamped "03:19 UT" - Comet C/2002 S7 = 2008 N4 = 1996 X3 (SOHO) - see below
MPEC 2009-J15 time-stamped "06:09 UT" - Daily Orbit Update - see below
MPEC 2009-J16 time-stamped "14:33 UT" - Comet C/2009 F2 (McNaught) - see below
MPEC 2009-J17 time-stamped "14:55 UT" - Comet C/2009 F4 (McNaught) - see below
MPEC 2009-J18 time-stamped "15:00 UT" - Comet C/2009 F5 (McNaught) - see below
MPEC 2009-J19 time-stamped "15:11 UT" - Comet C/2009 F6 (Yi-SWAN) - see below
MPEC 2009-J20 time-stamped "15:22 UT" - Comet C/2009 G1 (STEREO) - see below
MPEC 2009-J21 time-stamped "15:40 UT" - Observations of Comets - see below
MPEC 2009-J22 time-stamped "16:37 UT" - 2009 JR - see below
MPEC 2009-J23 time-stamped "16:44 UT" - 2009 JS

MPEC 2009-J23 - "16:44 UT" - 2009 JS

K09J00S 2009 JS (small asteroid, Earth MOID=3.3 LD, H=25.7 ~25m) was discovered at 0726 UT on 3 May by LINEAR, which observed it at May 3.31-37p5. The discovery was confirmed by Great Shefford Obs. (May 4.13p2). This object is now within ten lunar distances (LD) of Earth, reaching 3.3 LD on 30 April.

MPEC 2009-J22 - "16:37 UT" - 2009 JR

K09J00R 2009 JR (H=21.2 ~195m) was discovered at 0507 UT on 3 May by LINEAR, which observed it at May 3.21-28p5. The discovery was confirmed by Ernesto Guido via RAS Obs. Mayhill (May 4.31-33p4) and Grove Creek Obs. (May 4.38-40p7).

MPEC 2009-J21 - "15:40 UT" - Observations of Comets

PK09F070 P/2009 F7 (LINEAR) from Schiaparelli Obs. (April 21.96p1), Farm Cove Obs. (April 29.36-37p3 & May 3.40-41p3), Chante-Perdrix Obs. (April 29.90-92p3), Nazaret Obs. (April 30.95-96p3), Grove Creek Obs. (May 1.42p3 & 3.47-48p2), Jaen Obs. (May 1.90-92p2), and La Dehesilla Obs. (May 1.96p1 & 2.95p1)
PK08Y020 P/2008 Y2 (Gibbs) from the Spacewatch 1.8m telescope (April 20.19-22p9) and the Catalina Sky Survey (CSS) (April 29.24-26p4)
CK08T020 C/2008 T2 (Cardinal) from Moletai Obs. (April 26.84-85p3), Sendai Obs. (April 28.48p3), Santa Maria de Montmagastrell Obs. (April 29.86p3), Nazaret Obs. (April 30.85-86p3 & May 2.87-88p3), Rodeno Obs. (May 1.85p3), La Vara Obs. (May 1.88-89p3), and La Dehesilla Obs. (May 2.88-89p3)
CK08Q010 C/2008 Q1 (Maticic) from Sendai Obs. (April 28.60-62p3), Santa Maria de M. Obs. (April 28.99p3), Paus Obs. (April 29.91-92p3), La Dehesilla Obs. (May 1.11p3), Moriyama Obs. (May 1.60-61p2), Hamamatsu-Yuto Obs. (May 1.73-75p3), Rodeno Obs. (May 1.98-99p3), El Olivo Obs. (May 1.99p3 & 3.01-02p3), Casasco Obs. (May 2.08-09p2 & 2.99-00p2), Atlante Obs. (May 2.98p2), Posadas Obs. (May 3.03-04p3), and CSS (May 4.31-32p4)
CK08F75K C/2008 FK75 (Lemmon-Siding Spring) from Ageo Obs. (April 15.74-75p3), Schiaparelli Obs. (April 22.07p1), Sendai Obs. (April 28.63-64p3), Nazaret Obs. (April 28.97p3), La Dehesilla Obs. (May 1.06-07p3), Tzec Maun Obs. Mayhill (May 1.34-35p3), Paus Obs. (May 1.94-96p3), El Olivo Obs. (May 2.00-01p3), Rodeno Obs. (May 2.01-02p3), Posadas Obs. (May 3.04-05p3), and Farm Cove Obs. (May 3.45-46p3)
CK08A010 C/2008 A1 (McNaught) from Ageo Obs. (April 9.74-76p3), Moriyama Obs. (April 28.68p2), and Cyclops Obs. (May 1.93-94p2)
CK07Q030 C/2007 Q3 (Siding Spring) from Ageo Obs. (April 26.45p2 & 29.43-44p3), Yatsuka Obs. (April 29.46p2), and El Condor Obs. (April 29.98-00p3)
CK07N030 C/2007 N3 (Lulin) from Panker Obs. (April 21.85-87p2), Cordell-Lorenz Obs. (April 24.07-11p4), Moletai Obs. (April 26.82-83p5), Sendai Obs. (April 28.48-49p3), Hamamatsu-Yuto Obs. (April 29.48-49p3), Santa Maria de M. Obs. (April 29.87p3), Nazaret Obs. (April 30.87p2), Rodeno Obs. (May 1.86-87p3), Posadas Obs. (May 1.87p3), La Vara Obs. (May 1.89-90p3), Castelmartini Obs. (May 2.81p2), and Montcabre Obs. (May 2.83-86p3)
CK07D010 C/2007 D1 (LINEAR) from Schiaparelli Obs. (April 21.99p1 & 22.06p1), Tzec Maun Obs. Mayhill (April 27.29p2), Moriyama Obs. (April 27.64-65p2), and El Olivo Obs. (May 2.94p3)
CK07B020 C/2007 B2 (Skiff) from Grove Creek Obs. (April 18.76-77p2) and Kambah Obs. (April 30.65-66p2)
CK06W030 C/2006 W3 (Christensen) from Moriyama Obs. (April 28.72p2), Sendai Obs. (April 28.73p3), Yatsuka Obs. (April 28.79p3), and Chante-Perdrix Obs. (May 2.14p2)
CK06U060 C/2006 U6 (Spacewatch) from Nazaret Obs. (April 26.94-95p3), Moriyama Obs. (April 28.53-54p2), Santa Maria de M. Obs. (April 28.92-93p3), LINEAR (April 30.19-24p4), CSS (April 30.23-25p4), and Posadas Obs. (May 1.88-89p3)
CK06Q010 C/2006 Q1 (McNaught) from Hamamatsu-Yuto Obs. (April 28.77-78p4, 29.76-78p6, 30.74-76p3 & May 1.75-76p3), Malaga Obs. (April 28.98-03p3), Santa Maria de M. Obs. (April 28.00-01p2), Moriyama Obs. (April 29.63-64p2), Hiratsuka Obs. (April 30.56-57p3), Skylive Obs. (April 30.93-94p4 & May 1.08-09p6), Isle of Man Obs. (April 30.99p3), Tzec Maun Obs. Mayhill (May 1.36-37p3), Stammersdorf Obs. (May 1.95-97p3), Jaen Obs. (May 1.98-99p2), Masquefa Obs. (May 1.99-00p3), Rodeno Obs. (May 1.99-00p3), Casasco Obs. (May 1.00-03p2 & 2.95-97p2), Mt. Tuffley Obs. (May 1.00-01p3), El Olivo Obs. (May 2.04p3), La Vara Obs. (May 2.08-09p3), Posadas Obs. (May 3.07p3), Banyoles Obs. (May 3.86-87p3), and Castelmartini Obs. (May 3.94-95p4)
CK06O02F C/2006 OF2 (Broughton) from Sendai Obs. (April 28.49p3), Hamamatsu-Yuto Obs. (April 29.49-51p3), Santa Maria de M. Obs. (April 29.88p3), Nazaret Obs. (April 30.88p3), La Vara Obs. (May 1.94-95p2), Masquefa Obs. (May 2.85-86p3), and Castelmartini Obs. (May 3.80-81p3)
CK05S040 C/2005 S4 (McNaught) from Chante-Perdrix Obs. (April 24.04-05p2) and Paus Obs. (May 1.00-01p2)
CK05L030 C/2005 L3 (McNaught) from Panker Obs. (April 21.00p3), Remanzacco Obs. (April 25.95p1), Sendai Obs. (April 28.62-63p3), Hamamatsu-Yuto Obs. (April 28.71-72p4, 29.70-72p5, 30.65-66p3 & May 1.61-63p3), Malaga Obs. (April 28.86-93p3), Carmelita Obs. (April 28.89-90p3), Santa Maria de M. Obs. (April 28.98p3), Paus Obs. (April 29.88-89p3), Sant Celoni Obs. (April 29.90-93p3), Hiratsuka Obs. (April 30.52-53p3), Tzec Maun Obs. Mayhill (May 1.37-38p3), Montcabre Obs. (May 1.84-85p3), Stammersdorf Obs. (May 1.90-92p3), Rodeno Obs. (May 1.93-94p3), Chante-Perdrix Obs. (May 1.95-96p2 & 2.85-87p3), Masquefa Obs. (May 1.96-97p3), Posadas Obs. (May 1.97-98p3 & 3.01p3), El Olivo Obs. (May 1.98p3 & 2.95-96p3), La Vara Obs. (May 2.03-04p3), Atlante Obs. (May 2.93-95p3), and Nazaret Obs. (May 2.99-03p3)
CK02V94Q C/2002 VQ94 (LINEAR) from LINEAR (May 1.27-32p4) and Heidelberg-Konigstuhl Obs. (May 1.90-91p2)
0214P 214P/LINEAR from Kambah Obs. (March 28.67-71p2, April 30.69p2 & May 3.71p2)
0210P 210P/Christensen from Ageo Obs. (April 27.72p2), Chante-Perdrix Obs. (April 28.87-88p3), Nazaret Obs. (April 28.94-96p4), La Dehesilla Obs. (May 2.01p1), and the Mt. Lemmon Survey (MLS) (May 4.21-22p4)
0209P 209P/LINEAR from Ageo Obs. (April 23.74-75p4) and Moriyama Obs. (April 28.77-78p2)
0172P 172P/Yeung from the Siding Spring Survey (SSS) (April 23.72-76p4 & May 3.70-73p4)
0150P 150P/LONEOS from Kambah Obs. (March 28.59-60p2 & May 3.68-69p2) and SSS (May 1.66-67p2)
0144P 144P/Kushida from Panker Obs. (April 21.87-89p4), Sendai Obs. (April 28.49-50p3), Nazaret Obs. (April 28.88p3 & 30.89-90p3), La Axarquia Obs. (April 28.89-93p3), and Castelmartini Obs. (May 2.82p3 & 3.80p2)
0143P 143P/Kowal-Mrkos from Yatsuka Obs. (April 29.51-52p2), El Olivo Obs. (May 2.90-91p3), and Nazaret Obs. (May 2.90p1 & 2.95-97p3)
0116P 116P/Wild 4 from Vitebsk Obs. (April 25.81-82p3), Washington D.C. Obs. (April 27.05p2, 27.13-14p2 & 28.08-12p3), Sendai Obs. (April 28.50p3), Atlante Obs. (April 28.87-88p3), Nazaret Obs. (April 28.89-90p3 & 30.91-92p3), Santa Maria de M. Obs. (April 28.95-96p3), Tzec Maun Obs. Mayhill (April 29.24-25p3), Yatsuka Obs. (April 29.48p3), Isle of Man Obs. (April 30.98p3), Mt. Tuffley Obs. (May 1.98p3), and Castelmartini Obs. (May 3.81p3)
0088P 88P/Howell from Ageo Obs. (April 19.64p2), La Axarquia Obs. (April 27.89-91p3), Kiev Comet Station (April 27.97-98p5), Sendai Obs. (April 28.52p3), Santa Maria de M. Obs. (April 28.97-98p3), Hiratsuka Obs. (April 30.50-51p3), Masquefa Obs. (May 1.91-92p3), Rodeno Obs. (May 1.91-93p3), Linceo Obs. (May 1.92-93p3), El Olivo Obs. (May 1.95-96p3), Posadas Obs. (May 1.95p3), and Nazaret Obs. (May 2.97-98p3)
0077P 77P/Longmore from Vitebsk Obs. (April 24.82-84p3), Kiev Comet Station (April 27.94-96p7), Atlante Obs. (April 28.93-94p3), Santa Maria de M. Obs. (April 28.94p3), Yatsuka Obs. (April 29.50p3), Nazaret Obs. (April 29.92p3), Hiratsuka Obs. (April 30.47-48p3), MLS (May 1.19-22p4), Linceo Obs. (May 1.86-88p3), Stammersdorf Obs. (May 1.87-89p3), Montcabre Obs. (May 1.89-90p3), Masquefa Obs. (May 1.89-90p3), Rodeno Obs. (May 1.90p3), Posadas Obs. (May 1.90-91p3), El Olivo Obs. (May 1.93-94p3), and Osaki Obs. (May 2.59p2)
0074P 74P/Smirnova-Chernykh from Santa Maria de M. Obs. (April 29.91p3) and Castelmartini Obs. (May 3.82p3)
0067P 67P/Churyumov-Gerasimenko from Santa Maria de M. Obs. (April 29.83-84p3), Nazaret Obs. (April 30.84-85p5 & May 2.85-86p3), Rodeno Obs. (May 1.84-85p3), and La Vara Obs. (May 1.88p3)
0065P 65P/Gunn from Ageo Obs. (April 19.67-68p3), Sendai Obs. (April 28.51p3), Carmelita Obs. (April 28.86p3), Santa Maria de M. Obs. (April 28.96-97p3), Yatsuka Obs. (April 29.49p3), Nazaret Obs. (April 29.93-94p3), Isle of Man Obs. (April 30.00p4), Castelmartini Obs. (May 1.82-83p3), Montcabre Obs. (May 1.87-88p3), Rodeno Obs. (May 1.88-89p3), Linceo Obs. (May 1.89-91p3), Masquefa Obs. (May 1.93-95p3), Atlante Obs. (May 2.87p3), and El Olivo Obs. (May 2.91-92p3)
0029P 29P/Schwassmann-Wachmann 1 from Moletai Obs. (April 27.83-85p6), Nazaret Obs. (April 28.85-87p3 & 29.87p3), Santa Maria de M. Obs. (April 29.89-90p3), La Vara Obs. (May 1.92-93p3), and Masquefa Obs. (May 2.83-84p3)
0019P 19P/Borrelly from Maidbronn Obs. (April 24.99-01p4), Moriyama Obs. (April 28.59-60p2), Nazaret Obs. (April 28.91p3 & 30.93-94p4), La Dehesilla Obs. (May 1.99p1), and Chante-Perdrix Obs. (May 2.84p1)

MPEC 2009-J20 - "15:22 UT" - Comet C/2009 G1 (STEREO)

CK09G010 C/2009 G1 (STEREO) (i=108.3°, q=1.129 AU, TP=2009 Apr. 16.564 TT) from Moriyama Obs. (April 28.79-80p2), Ageo Obs. (April 29.79p3, 30.79p2 & May 1.79p3), and RAS Obs. Moorook (May 2.79-80p3)

MPEC 2009-J19 - "15:11 UT" - Comet C/2009 F6 (Yi-SWAN)

CK09F060 C/2009 F6 (Yi-SWAN) (i=85.8°, q=1.275 AU, TP=2009 May 7.383 TT) from Panker Obs. (April 21.83-84p5), Ageo Obs. (April 26.46-48p3), Kiev Comet Station (April 27.86-92p13), Moriyama Obs. (April 28.79p2), and Yatsuka Obs. (April 29.47p3)

MPEC 2009-J18 - "15:00 UT" - Comet C/2009 F5 (McNaught)

CK09F050 C/2009 F5 (McNaught) (i=85.0°, q=2.245 AU, Q=157.925 AU, TP=2008 Nov. 4.8271 TT) from Remanzacco Obs. (April 27.03p2), Ageo Obs. (April 27.68-69p2 & 29.69-70p3), Kiev Comet Station (April 27.98-00p7), Farm Cove Obs. (April 29.39p3 & May 3.42p3), Yatsuka Obs. (April 29.53p3), Moriyama Obs. (April 29.60p2), Linceo Obs. (May 1.94-96p3), Atlante Obs. (May 2.96-97p3), Posadas Obs. (May 3.02-03p3), LINEAR (May 3.30-36p5), Grove Creek Obs. (May 3.45-46p2), and Sant Celoni Obs. (May 3.89-93p3)

MPEC 2009-J17 - "14:55 UT" - Comet C/2009 F4 (McNaught)

CK09F040 C/2009 F4 (McNaught) (i=79.3°, q=5.460 AU, TP=2012 Jan. 1.5683 TT) from Ageo Obs. (April 15.72-73p2 & 26.72p2), Kiev Comet Station (April 28.04-05p4), Moriyama Obs. (April 29.61-62p2), La Vara Obs. (May 2.06-07p3), Farm Cove Obs. (May 3.43-44p3), Mt. John Obs. (May 3.47p3), and Kambah Obs. (May 3.66-67p2)

MPEC 2009-J16 - "14:33 UT" - Comet C/2009 F2 (McNaught)

CK09F020 C/2009 F2 (McNaught) (i=59.3°, q=5.875 AU, Q=699.084 AU, TP=2009 Nov. 14.2639 TT) from Beta Orionis Obs. (May 1.96-98p2), Mt. John Obs. (May 3.41-42p3), Grove Creek Obs. (May 3.42-44p2), and North Ryde Obs. (May 4.41-44p2)

<< DOU on 4 May '09 >> MPEC 2009-J15 - "06:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K09H82F 2009 HF82 (i=36.0°, arc=3 days, H=20.3 ~295m) from Spacewatch 1.8m (May 3.34-36p5)
K09H82C 2009 HC82 (i=154.6°, Q=4.374 AU, arc=5 days, H=16.2 ~1.95 km) from Great Shefford Obs. (May 4.04-05p2)
K09H58V 2009 HV58 (i=47.3°, arc=8 days, H=19.5 ~426m) from Spacewatch 1.8m (May 3.32p2)
K09H00C 2009 HC (small asteroid, arc=16 days, H=24.8 ~37m) from Spacewatch 1.8m (May 3.27p3)
Observations of recently (no longer) risk-listed objects
K09H51X 2009 HX51 (arc=11 days, H=21.1 ~204m) from Spacewatch 1.8m (May 4.19-20p3)
Observations of small asteroids (H>22.0)
K09J00A 2009 JA (arc=3 days, H=25.5 ~27m) from Mt. John Obs. (May 3.58p5 & 3.67p4) and Great Shefford Obs. (May 4.00-01p5)
K09H82M 2009 HM82 (arc=4 days, H=22.5 ~107m) from Mt. John Obs. (May 3.60p11) and Great Shefford Obs. (May 3.98-02p5)
K09H00G 2009 HG (arc=16 days, H=24.0 ~54m) from Mt. John Obs. (May 3.46p3)
K09H00D 2009 HD (arc=16 days, H=22.8 ~93m) from Grove Creek Obs. (May 3.54p2)
Observations of almost-small asteroids (21.7<H<=22.0)
K09H21C 2009 HC21 (arc=13 days, H=22.0 ~135m) from Spacewatch 1.8m (May 3.30-31p3) and Mt. John Obs. (May 3.45p4)
Observations of other objects
K09H88F 2009 HF88 (arc=3 days, H=19.6 ~407m) from Spacewatch 1.8m (May 3.39-40p3)
K09H82D 2009 HD82 (arc=9 days, H=21.6 ~162m) from Spacewatch 1.8m (May 3.41p3)
K09H82B 2009 HB82 (Q=4.514 AU, arc=8 days, H=17.7 ~977m) from SSS (May 1.78p1)
K09H67Z 2009 HZ67 (arc=6 days, H=21.1 ~204m) from Engelhardt Obs. Zelenchukskaya Station (May 4.01p2)
K09H51Y 2009 HY51 (arc=10 days, H=20.7 ~245m) from Spacewatch 1.8m (May 3.37-38p3)
K09H44V 2009 HV44 (i=37.9°, arc=12 days, H=19.0 ~537m) from Casasco Obs. (May 2.10p2) and Doc Greiner Research Obs. (DGRO) (May 4.20-21p18)
K09D47E 2009 DE47 (arc=64 days, H=18.7 ~616m) from Grove Creek Obs. (May 3.52-53p4)
K09D01L 2009 DL1 (arc=73 days, H=18.9 ~562m) from El Condor Obs. (May 3.31-32p2) and Grove Creek Obs. (May 3.57p3)
K08W02N 2008 WN2 (arc=191 days, H=20.8 ~234m) from LINEAR (May 3.30-33p3)
K08R98G 2008 RG98 (arc=2 opp, H=17.2 ~1.23 km) from SSS (May 2.81p2)
K07B02T 2007 BT2 (arc=3 opp, H=17.1 ~1.29 km) from Posadas Obs. (May 2.92-93p3)
K06U63C 2006 UC63 (arc=2 opp, H=19.8 ~371m) from Spacewatch 1.8m (May 4.15p2)
K05M13O 2005 MO13 (arc=2 opp, H=20.7 ~245m) from Mt. John Obs. (May 3.64-66p6)
K05M05R 2005 MR5 (arc=2 opp, H=20.6 ~257m) from Mt. John Obs. (May 3.68-70p6)
K05M00C 2005 MC (Q=4.169 AU, arc=3 opp, H=16.3 ~1.86 km) from Mt. John Obs. (May 3.71-72p4)
K7945 207945 1991 JW from Posadas Obs. (May 3.06p3)
F5334 155334 2006 DZ169 from Posadas Obs. (May 2.93-94p2)
E3947 143947 2003 YQ117 from LINEAR (May 3.31-36p4)
D8911 138911 2001 AE2 from LINEAR (May 3.38-43p4)
D6617 136617 1994 CC from SSS (May 3.53-56p4)
86666 86666 2000 FL10 from Mirasteilas Obs. (May 3.82-84p3) and Jaen Obs. (May 3.86-90p2)
52768 52768 1998 OR2 from El Condor Obs. (May 3.38-39p3)
04954 4954 Eric (1990 SQ) from El Condor Obs. (May 3.36-37p2)
03988 3988 1986 LA from LINEAR (May 3.22-27p4)
03552 3552 Don Quixote (1983 SA) from SSS (May 2.54-56p4)

MPEC 2009-J14 - "03:19 UT" - Comet C/2002 S7 = 2008 N4 = 1996 X3 (SOHO)

Observers on 4 May '09

A total of 62 observing facilities appear in today's MPECs.

Code	Observer / observatory
`349`	Ageo Obs. in Japan, 11 in MPECs 2009-J17, 2009-J18, 2009-J19, 2009-J20 & 2009-J21 -- C/2009 G1, C/2009 F6, C/2009 F5, C/2009 F4, C/2008 FK75, C/2008 A1, C/2007 Q3, 210P, 209P, 88P, 65P
`J51`	Atlante Obs. in the Canary Islands, 6 in MPECs 2009-J18 & 2009-J21 -- C/2009 F5, C/2008 Q1, C/2005 L3, 116P, 77P, 65P
`B87`	Banyoles Obs. in Spain, 1 in MPEC 2009-J21 -- C/2006 Q1
`I32`	Beta Orionis Obs. in Argentina, 1 in MPEC 2009-J16 -- C/2009 F2
`B20`	Carmelita Obs. in Spain, 2 in MPEC 2009-J21 -- C/2005 L3, 65P
`B66`	Casasco Obs. in Italy, 3 in MPECs 2009-J15 & 2009-J21 -- 2009 HV44, C/2008 Q1, C/2006 Q1
`160`	Castelmartini Obs. in Italy, 7 in MPEC 2009-J21 -- C/2007 N3, C/2006 Q1, C/2006 OF2, 144P, 116P, 74P, 65P
`703`	Catalina Sky Survey (CSS) in Arizona, 3 in MPEC 2009-J21 -- P/2008 Y2, C/2008 Q1, C/2006 U6
`A77`	Chante-Perdrix Obs. in France, 6 in MPEC 2009-J21 -- P/2009 F7, C/2006 W3, C/2005 S4, C/2005 L3, 210P, 19P
`850`	Cordell-Lorenz Obs. in Tennessee, 1 in MPEC 2009-J21 -- C/2007 N3
`B84`	Cyclops Obs. in The Netherlands, 1 in MPEC 2009-J21 -- C/2008 A1
`H26`	Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2009-J15 -- 2009 HV44
`I21`	El Condor Obs. in Argentina, 4 in MPECs 2009-J15 & 2009-J21 -- 2009 DL1, C/2007 Q3, 52768, 4954
`J36`	El Olivo Obs. in Spain, 9 in MPEC 2009-J21 -- C/2008 Q1, C/2008 FK75, C/2007 D1, C/2006 Q1, C/2005 L3, 143P, 88P, 77P, 65P
`114`	Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-J15 -- 2009 HZ67
`E85`	Farm Cove Obs. in New Zealand, 4 in MPECs 2009-J17, 2009-J18 & 2009-J21 -- P/2009 F7, C/2009 F5, C/2009 F4, C/2008 FK75
`J95`	Great Shefford Obs. in England, 4 in MPECs 2009-J15 & 2009-J23 -- 2009 JS, 2009 JA, 2009 HM82, 2009 HC82
`E16`	Grove Creek Obs. in New South Wales, 8 in MPECs 2009-J15, 2009-J16, 2009-J18, 2009-J21 & 2009-J22 -- 2009 JR, 2009 HD, P/2009 F7, C/2009 F5, C/2009 F2, 2009 DL1, 2009 DE47, C/2007 B2
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-J21 -- C/2008 Q1, C/2007 N3, C/2006 Q1, C/2006 OF2, C/2005 L3
`024`	Heidelberg-Konigstuhl Obs. in Germany, 1 in MPEC 2009-J21 -- C/2002 VQ94
`D88`	Hiratsuka Obs. in Japan, 4 in MPEC 2009-J21 -- C/2006 Q1, C/2005 L3, 88P, 77P
`987`	Isle of Man Obs. on the Isle of Man, 3 in MPEC 2009-J21 -- C/2006 Q1, 116P, 65P
`J28`	Jaen Obs. in Spain, 3 in MPECs 2009-J15 & 2009-J21 -- P/2009 F7, C/2006 Q1, 86666
`415`	Kambah Obs. in the Australian Capital Territory, 4 in MPECs 2009-J17 & 2009-J21 -- C/2009 F4, C/2007 B2, 214P, 150P
`585`	Kiev Comet Station in the Ukraine, 5 in MPECs 2009-J17, 2009-J18, 2009-J19 & 2009-J21 -- C/2009 F6, C/2009 F5, C/2009 F4, 88P, 77P
`704`	LINEAR in New Mexico, 9 in MPECs 2009-J15, 2009-J18, 2009-J21, 2009-J22 & 2009-J23 -- 2009 JS, 2009 JR, C/2009 F5, 2008 WN2, C/2006 U6, C/2002 VQ94, 143947, 138911, 3988
`J31`	La Axarquia Obs. in Spain, 2 in MPEC 2009-J21 -- 144P, 88P
`212`	La Dehesilla Obs. in Spain, 6 in MPEC 2009-J21 -- P/2009 F7, C/2008 T2, C/2008 Q1, C/2008 FK75, 210P, 19P
`J38`	La Vara Obs. in Spain, 8 in MPECs 2009-J17 & 2009-J21 -- C/2009 F4, C/2008 T2, C/2007 N3, C/2006 Q1, C/2006 OF2, C/2005 L3, 67P, 29P
`J59`	Linceo Obs. in Spain, 4 in MPECs 2009-J18 & 2009-J21 -- C/2009 F5, 88P, 77P, 65P
`B82`	Maidbronn Obs. in Germany, 1 in MPEC 2009-J21 -- 19P
`J40`	Malaga Obs. in Spain, 2 in MPEC 2009-J21 -- C/2006 Q1, C/2005 L3
`232`	Masquefa Obs. in Spain, 7 in MPEC 2009-J21 -- C/2006 Q1, C/2006 OF2, C/2005 L3, 88P, 77P, 65P, 29P
`B67`	Mirasteilas Obs. in Switzerland, 1 in MPEC 2009-J15 -- 86666
`152`	Moletai Obs. in Lithuania, 3 in MPEC 2009-J21 -- C/2008 T2, C/2007 N3, 29P
`213`	Montcabre Obs. in Spain, 4 in MPEC 2009-J21 -- C/2007 N3, C/2005 L3, 77P, 65P
`900`	Moriyama Obs. in Japan, 12 in MPECs 2009-J17, 2009-J18, 2009-J19, 2009-J20 & 2009-J21 -- C/2009 G1, C/2009 F6, C/2009 F5, C/2009 F4, C/2008 Q1, C/2008 A1, C/2007 D1, C/2006 W3, C/2006 U6, C/2006 Q1, 209P, 19P
`474`	Mt. John Obs. in New Zealand, 9 in MPECs 2009-J15, 2009-J16 & 2009-J17 -- 2009 JA, 2009 HM82, 2009 HG, 2009 HC21, C/2009 F4, C/2009 F2, 2005 MR5, 2005 MO13, 2005 MC
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2009-J21 -- 210P, 77P
`J93`	Mt. Tuffley Obs. in England, 2 in MPEC 2009-J21 -- C/2006 Q1, 116P
`J47`	Nazaret Obs. in Spain, 17 in MPEC 2009-J21 -- P/2009 F7, C/2008 T2, C/2008 FK75, C/2007 N3, C/2006 U6, C/2006 OF2, C/2005 L3, 210P, 144P, 143P, 116P, 88P, 77P, 67P, 65P, 29P, 19P
`423`	North Ryde Obs. in New South Wales, 1 in MPEC 2009-J16 -- C/2009 F2
`D92`	Osaki Obs. in Japan, 1 in MPEC 2009-J21 -- 77P
`A32`	Panker Obs. in Germany, 4 in MPECs 2009-J19 & 2009-J21 -- C/2009 F6, C/2007 N3, C/2005 L3, 144P
`B49`	Paus Obs. in Spain, 4 in MPEC 2009-J21 -- C/2008 Q1, C/2008 FK75, C/2005 S4, C/2005 L3
`J53`	Posadas Obs. in Spain, 12 in MPECs 2009-J15, 2009-J18 & 2009-J21 -- C/2009 F5, C/2008 Q1, C/2008 FK75, C/2007 N3, 2007 BT2, C/2006 U6, C/2006 Q1, C/2005 L3, 207945, 155334, 88P, 77P
`H06%`	Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-J22 -- 2009 JR
`D90`	RAS Obs. Moorook in South Australia, 1 in MPEC 2009-J20 -- C/2009 G1
`473`	Remanzacco Obs. in Italy, 2 in MPECs 2009-J18 & 2009-J21 -- C/2009 F5, C/2005 L3
`939`	Rodeno Obs. in Spain, 10 in MPEC 2009-J21 -- C/2008 T2, C/2008 Q1, C/2008 FK75, C/2007 N3, C/2006 Q1, C/2005 L3, 88P, 77P, 67P, 65P
`B70`	Sant Celoni Obs. in Spain, 2 in MPECs 2009-J18 & 2009-J21 -- C/2009 F5, C/2005 L3
`B74`	Santa Maria de Montmagastrell Obs. in Spain, 14 in MPEC 2009-J21 -- C/2008 T2, C/2008 Q1, C/2007 N3, C/2006 U6, C/2006 Q1, C/2006 OF2, C/2005 L3, 116P, 88P, 77P, 74P, 67P, 65P, 29P
`204`	Schiaparelli Obs. in Italy, 3 in MPEC 2009-J21 -- P/2009 F7, C/2008 FK75, C/2007 D1
`D93`	Sendai Obs. in Japan, 11 in MPEC 2009-J21 -- C/2008 T2, C/2008 Q1, C/2008 FK75, C/2007 N3, C/2006 W3, C/2006 OF2, C/2005 L3, 144P, 116P, 88P, 65P
`E12`	Siding Spring Survey (SSS) in New South Wales, 6 in MPECs 2009-J15 & 2009-J21 -- 2009 HB82, 2008 RG98, 136617, 3552, 172P, 150P
`B40`	Skylive Obs. in Italy, 1 in MPEC 2009-J21 -- C/2006 Q1
`291`	Spacewatch 1.8m telescope in Arizona, 10 in MPECs 2009-J15 & 2009-J21 -- 2009 HY51, 2009 HX51, 2009 HV58, 2009 HF88, 2009 HF82, 2009 HD82, 2009 HC21, 2009 HC, P/2008 Y2, 2006 UC63
`A97`	Stammersdorf Obs. in Austria, 3 in MPEC 2009-J21 -- C/2006 Q1, C/2005 L3, 77P
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 5 in MPEC 2009-J21 -- C/2008 FK75, C/2007 D1, C/2006 Q1, C/2005 L3, 116P
`B42`	Vitebsk Obs. in Belarus, 2 in MPEC 2009-J21 -- 116P, 77P
`I13`	Washington D.C. Obs. in Washington, D.C., 1 in MPEC 2009-J21 -- 116P
`367`	Yatsuka Obs. in Japan, 8 in MPECs 2009-J18, 2009-J19 & 2009-J21 -- C/2009 F6, C/2009 F5, C/2007 Q3, C/2006 W3, 143P, 116P, 77P, 65P

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

Impact Risk Monitoring on 4 May '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 HF82	JPL Sentry	1312	R E M O V E D						JPL: Risk listing removed at 0854 UTC.
2009 HF82	NEODyS	1312	R E M O V E D						-

2009 HC82	JPL Sentry	1312	2012-2109	31	5.0e-08	-1.14	-1.17	0	JPL: "Analysis based on 23 observations spanning 4.6749 days (2009-Apr-29.37373 to 2009-May-04.04865)." Diameter approximately 1.900 km. from mean, weighted H=16.2.
2009 HC82	NEODyS	1312	2012-2090	52	5.74e-08	-1.18	-1.23	0	NEODyS: "Based on 24 optical observations (of which 1 are rejected as outliers) from 2009/04/29.374 to 2009/05/04.049."

2009 HV58	JPL Sentry	1312	2011-2105	13	1.0e-07	-2.84	-2.85	0	JPL: "Analysis based on 31 observations spanning 7.9301 days (2009-Apr-25.39439 to 2009-May-03.32445)." Diameter approximately 0.440 km. from mean, weighted H=19.4.
2009 HV58	NEODyS	1312	2011-2090	11	1.03e-07	-2.75	-2.76	0	NEODyS: "Based on 31 optical observations (of which 0 are rejected as outliers) from 2009/04/25.395 to 2009/05/03.325."

2009 HC	JPL Sentry	1312	2095-2098	6	1.6e-06	-6.19	-6.80	0	JPL: "Analysis based on 108 observations spanning 16.043 days (2009-Apr-17.23164 to 2009-May-03.27432)." Diameter approximately 0.036 km. from mean, weighted H=24.9.

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 May '09

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

1700	Grabbed MPEC 2009-J22 - 2009 JR - see above Grabbed MPEC 2009-J23 - 2009 JS - see above
1604	Grabbed MPEC 2009-J21 - Observations of Comets - see above
1534	Grabbed MPEC 2009-J18 - Comet C/2009 F5 (McNaught) - see above Grabbed MPEC 2009-J19 - Comet C/2009 F6 (Yi-SWAN) - see above Grabbed MPEC 2009-J20 - Comet C/2009 G1 (STEREO) - see above
1500	Grabbed MPEC 2009-J16 - Comet C/2009 F2 (McNaught) - see above Grabbed MPEC 2009-J17 - Comet C/2009 F4 (McNaught) - see above
1312	Noted that JPL Sentry has updated its 2009 HC risk assessment - see above Noted that JPL Sentry has posted 2009 HC82 as an impact risk - see above Noted that NEODyS has posted 2009 HC82 as an impact risk - see above Noted that JPL Sentry has removed 2009 HF82 as an impact risk - see above Noted that NEODyS has removed 2009 HF82 as an impact risk - see above Noted that JPL Sentry has updated its 2009 HV58 risk assessment - see above Noted that NEODyS has updated its 2009 HV58 risk assessment - see above Grabbed MPEC 2009-J15 - Daily Orbit Update - see above
0414	Grabbed MPEC 2009-J14 - Comet C/2002 S7 = 2008 N4 = 1996 X3 (SOHO) - see above

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