2009-11-20 Tracking News

Contents on 20 November '09

IAU Minor Planet Center
- NEOCP Activity -- nine listings: 2 new, 7 updated
- New MPECs -- eleven MPECs
Observers -- 27 observing facilities
Impact Risk Monitoring -- eleven objects
Chronology

Resources:

Consolidated Risk Tables - the CRT page
Earth's Busy Neighborhood Traffic Report
Ephemerides for risk-rated and nearby objects
News image catalog
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 20 November '09

The MPC's NEO Confirmation Page has 9 listings: 2 new, 7 updated

When last checked at 2321 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and seven updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of 22 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 20 November '09

Minor Planet Electronic Circulars

As of last check at 2321 UTC, there have been eleven MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2009-W47 time-stamped "07:12 UT" - Daily Orbit Update - see below
MPEC 2009-W48 time-stamped "12:55 UT" - 1998 HJ3 - see below
MPEC 2009-W49 time-stamped "13:59 UT" - 2009 VZ25 - see below
MPEC 2009-W50 time-stamped "15:11 UT" - 2009 WV7 - see below
MPEC 2009-W51 time-stamped "15:20 UT" - 2009 WW7 - see below
MPEC 2009-W52 time-stamped "15:29 UT" - 2009 WX7 - see below
MPEC 2009-W53 time-stamped "15:32 UT" - 2009 WY7 - see below
MPEC 2009-W54 time-stamped "15:39 UT" - 2009 WZ7 - see below
MPEC 2009-W55 time-stamped "18:45 UT" - 2009 WM8 - see below
MPEC 2009-W56 time-stamped "18:48 UT" - 2009 WN8 - see below
MPEC 2009-W57 time-stamped "19:51 UT" - 2009 WO8

MPEC 2009-W57 - "19:51 UT" - 2009 WO8

K09W08O 2009 WO8 (small asteroid, H=27.2 ~12m) was discovered at 0757 UT on 20 Nov. by the Mt. Lemmon Survey (MLS), which observed it at Nov. 20.33-38p8 and 20.45p3. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Nov. 20.39-41p4), Sabino Canyon Obs. (Nov. 20.41-42p3), and Tenagra II Obs. (Nov. 20.43p3).

MPEC 2009-W56 - "18:48 UT" - 2009 WN8

K09W08N 2009 WN8 (small asteroid, Earth MOID=5.8 LD, H=24.6 ~41m) was discovered at 0726 UT on 19 Nov. by LINEAR, which observed it at Nov. 19.31-36p5. The discovery was confirmed by MLS (Nov. 20.40-42p4).

MPEC 2009-W55 - "18:45 UT" - 2009 WM8

K09W08M 2009 WM8 (small asteroid, Earth MOID=9.6 LD, H=24.8 ~37m) was discovered at 1104 UT on 17 Nov. by MLS, which observed it at Nov. 17.46-47p3, 17.52p4, 18.49-50p3, 19.52p2, and 20.46-47p3. The discovery was confirmed by MRO (Nov. 17.50-52p4).

MPEC 2009-W54 - "15:39 UT" - 2009 WZ7

K09W07Z 2009 WZ7 (H=19.6 ~407m) was discovered at 0851 UT on 19 Nov. by LINEAR, which observed it at Nov. 19.37-42p4. The discovery was confirmed by Modra Obs. (Nov. 20.17-18p3), MRO (Nov. 20.28-30p4), Sabino Canyon Obs. (Nov. 20.38p3), Cordell-Lorenz Obs. (Nov. 20.40-44p7), and Tenagra II Obs. (Nov. 20.45-46p3).

MPEC 2009-W53 - "15:32 UT" - 2009 WY7

K09W07Y 2009 WY7 (risk-listed, q=0.254 AU, Earth MOID=3.8 LD, H=23.6 ~65m) was discovered at 0715 UT on 19 Nov. by LINEAR, which observed it at Nov. 19.30-34p4. The discovery was confirmed by MLS (Nov. 20.39-41p4).

MPEC 2009-W52 - "15:29 UT" - 2009 WX7

K09W07X 2009 WX7 (small asteroid, Earth MOID=3.2 LD, H=26.7 ~15m) was discovered at 0715 UT on 19 Nov. by LINEAR, which observed it at Nov. 19.30-35p5. The discovery was confirmed by MLS (Nov. 20.40-42p3) and MRO (Nov. 20.49-51p4). This object is now within ten lunar distances (LD) of Earth, reaching 3.7 LD on 17 Nov.

MPEC 2009-W51 - "15:20 UT" - 2009 WW7

K09W07W 2009 WW7 (risk-listed, Earth MOID=0.7 LD, H=28.9 ~6m) was discovered at 0652 UT on 19 Nov. by MLS, which observed it at Nov. 19.24-29p7, 19.35p4, and 20.19p2. The discovery was confirmed by MRO (Nov. 20.21-23p5), Astronomical Research Obs. Westfield (ARO Westfield) (Nov. 20.21-22p3), the Spacewatch 1.8m telescope (Nov. 20.25-26p3), and Tenagra II Obs. (Nov. 20.36-37p2). This object is now within ten lunar distances (LD) of Earth, reaching 1.9 LD on 18 Nov.

MPEC 2009-W50 - "15:11 UT" - 2009 WV7

K09W07V 2009 WV7 (small asteroid, H=25.9 ~22m) was discovered at 0504 UT on 19 Nov. by the Catalina Sky Survey (CSS), which observed it at Nov. 19.21-26p8 and 19.36p2. The discovery was confirmed by Sabino Canyon Obs. (Nov. 19.28-29p3 & 20.31-32p2), MRO (Nov. 19.30-31p4 & 20.15-17p5), Spacewatch 1.8m (Nov. 20.06-07p3), Tenagra II Obs. (Nov. 20.12-13p3), ARO Westfield (Nov. 20.22-23p3), and Jim Young via Table Mtn. Obs. (Nov. 20.31-33p4).

MPEC 2009-W49 - "13:59 UT" - 2009 VZ25

K09V25Z 2009 VZ25 (risk-listed, Q=4.590 AU, H=23.6 ~65m) from the Spacewatch 0.9m telescope (Nov. 20.15-18p3), Spacewatch 1.8m (Nov. 20.23-24p2 & 20.44-45p3), MRO (Nov. 20.25-27p3), and ARO Westfield (Nov. 20.32-34p3)

MPEC 2009-W48 - "12:55 UT" - 1998 HJ3

J98H03J 1998 HJ3 (risk-listed, Earth MOID=4.5 LD, H=18.8 ~589m) from LINEAR (Nov. 19.37-41p4), Modra Obs. (Nov. 20.16p5), MRO (Nov. 20.28-30p4), Cordell-Lorenz Obs. (Nov. 20.30-35p5), Sabino Canyon Obs. (Nov. 20.35-36p3), Tenagra II Obs. (Nov. 20.43p3), and Tzec Maun Obs. Mayhill (Nov. 20.51p2)

<< DOU on 20 Nov. '09 >> MPEC 2009-W47 - "07:12 UT" - Daily Orbit Update

Observations of risk-listed objects
K09W06P 2009 WP6 (small asteroid, q=0.293 AU, arc=2 days, H=26.8 ~15m) from Spacewatch 1.8m (Nov. 20.18-19p3)
K09W06J 2009 WJ6 (small asteroid, arc=1 day, H=27.4 ~11m) from Alter Satzberg Obs. (Nov. 19.85-87p6), Great Shefford Obs. (Nov. 19.90-95p9), Bergen-Enkheim Obs. (Nov. 19.96-98p5), and Tenagra II Obs. (Nov. 20.10p2)
K09W01M 2009 WM1 (arc=2 days, H=20.4 ~282m) from Spacewatch 1.8m (Nov. 19.48p2)
K09W01J 2009 WJ1 (arc=3 days, H=21.3 ~186m) from Spacewatch 1.8m (Nov. 20.08-09p3)
K09V26A 2009 VA26 (i=38.4°, arc=9 days, H=20.8 ~234m) from MLS (Nov. 19.29-31p4) and Spacewatch 1.8m (Nov. 20.19-20p3)
Observations of recently (no longer) risk-listed objects
K09W00F 2009 WF (arc=3 days, H=19.8 ~371m) from Tenagra II Obs. (Nov. 19.47p3)
K09W00B 2009 WB (small asteroid, arc=3 days, H=24.1 ~51m) from LINEAR (Nov. 19.19-23p4) and Tenagra II Obs. (Nov. 19.25-26p3)
K09U18W 2009 UW18 (arc=27 days, H=19.6 ~407m) from MLS (Nov. 18.32-35p4) and LINEAR (Nov. 19.26-29p4)
K09U18V 2009 UV18 (Q=5.187 AU, arc=2 opp, H=15.5 ~2.69 km, q=1.167 AU) from Hamamatsu-Yuto Obs. (Nov. 19.81-83p2)
Observations of small asteroids (H>22.0)
K09W06X 2009 WX6 (arc=1 day, H=23.8 ~59m) from Drebach Obs. (Nov. 19.88-90p5)
K09W01K 2009 WK1 (arc=2 days, H=27.2 ~12m) from Tenagra II Obs. (Nov. 19.31-32p3)
K09W00E 2009 WE (arc=3 days, H=22.2 ~123m) from MLS (Nov. 19.17p4)
K09V44S 2009 VS44 (arc=4 days, H=25.6 ~26m) from Chabot Obs. (Nov. 19.34-35p3)
K09V44R 2009 VR44 (arc=4 days, H=25.0 ~34m) from Chabot Obs. (Nov. 19.32-33p3)
K09V24J 2009 VJ24 (arc=11 days, H=22.1 ~129m) from Spacewatch 1.8m (Nov. 20.09-10p3)
K09V01N 2009 VN1 (arc=5 days, H=24.2 ~49m) from Spacewatch 1.8m (Nov. 19.28-29p2)
K09U01N 2009 UN1 (arc=33 days, H=25.3 ~29m) from Spacewatch 1.8m (Nov. 19.34-35p2)
Observations of other objects
K09W06O 2009 WO6 (Q=4.869 AU, arc=32 days, H=17.2 ~1.23 km) from CSS (Nov. 18.31-33p4)
K09W00N 2009 WN (arc=3 days, H=18.8 ~589m) from LINEAR (Nov. 19.43-47p4)
K09V00Z 2009 VZ (arc=11 days, H=21.3 ~186m) from Petit Jean Mtn. South Obs. (PJMSO) (Nov. 19.36-37p11)
K09U28K 2009 UK28 (arc=25 days, H=19.7 ~389m) from Thompsonville Obs. (Nov. 20.17-19p6)
K09U03M 2009 UM3 (Q=4.350 AU, arc=30 days, H=17.9 ~891m) from CSS (Nov. 18.38-40p3)
K09T10M 2009 TM10 (arc=62 days, H=19.4 ~446m) from LINEAR (Nov. 19.19-23p4)
K09SA3M 2009 SM103 (Q=4.412 AU, arc=56 days, H=16.8 ~1.48 km) from Thompsonville Obs. (Nov. 20.09-11p6)
K09S19T 2009 ST19 (arc=65 days, H=18.3 ~741m) from CSS (Nov. 19.30-32p4) and Santa Maria de Montmagastrell Obs. (Nov. 19.90-92p3)
K09R00N 2009 RN (Q=4.583 AU, arc=70 days, H=19.9 ~355m) from Hamamatsu-Yuto Obs. (Nov. 19.69-72p4)
K09Q34D 2009 QD34 (arc=85 days, H=18.0 ~851m) from LINEAR (Nov. 19.25-30p5)
K09Q02H 2009 QH2 (arc=93 days, H=21.2 ~195m) from Spacewatch 0.9m (Nov. 19.11-13p3)
K09N00H 2009 NH (arc=132 days, H=18.7 ~616m) from Thompsonville Obs. (Nov. 20.21-22p6)
K09N00A 2009 NA (Q=4.129 AU, arc=142 days, H=17.6 ~1.02 km) from PJMSO (Nov. 19.23-24p6) and Thompsonville Obs. (Nov. 20.24-25p6)
K09M06X 2009 MX6 (arc=148 days, H=19.2 ~490m) from PJMSO (Nov. 19.24-25p6)
K09K08K 2009 KK8 (arc=174 days, H=18.8 ~589m) from Spacewatch 0.9m (Nov. 18.19-23p3)
K09K03C 2009 KC3 (Q=5.447 AU, arc=2 opp, H=18.0 ~851m) from La Sagra Obs. (Nov. 18.77-80p3)
K08W59B 2008 WB59 (arc=2 opp, H=19.4 ~446m) from Thompsonville Obs. (Nov. 20.16-17p6)
K08G01E 2008 GE1 (arc=2 opp, H=19.3 ~467m) from Spacewatch 1.8m (Nov. 19.53p3)
K07B48X 2007 BX48 (arc=2 opp, H=20.1 ~323m) from Chabot Obs. (Nov. 19.30-31p3)
K07B29G 2007 BG29 (arc=3 opp, H=18.0 ~851m) from CSS (Nov. 19.48-50p4)
K06U00R 2006 UR (arc=2 opp, H=19.2 ~490m) from PJMSO (Nov. 19.25-26p5)
K05Y93Y 2005 YY93 (q=0.302 AU, Q=4.871 AU, arc=3 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (Nov. 19.31-33p3 at V=22.6)
K05R06Q 2005 RQ6 (arc=2 opp, H=18.9 ~562m) from PJMSO (Nov. 19.33-34p5), Hamamatsu-Yuto Obs. (Nov. 19.53-54p4), Atlante Obs. (Nov. 19.98-00p3), and Thompsonville Obs. (Nov. 20.14-15p6)
K05Q00L 2005 QL (arc=2 opp, H=18.8 ~589m) from LINEAR (Nov. 19.37-42p4)
K05L07V 2005 LV7 (arc=2 opp, H=19.2 ~490m) from Spacewatch 1.8m (Nov. 19.44-45p2)
K05E29Z 2005 EZ29 (arc=2 opp, H=20.3 ~295m) from Spacewatch 1.8m (Nov. 19.29-30p3)
K04X04K 2004 XK4 (arc=2 opp, H=20.9 ~224m) from Spacewatch 1.8m (Nov. 19.38-40p3 at V=20.9-22.3)
K03X11F 2003 XF11 (q=0.332 AU, Q=4.055 AU, arc=4 opp, H=16.9 ~1.41 km) from Spacewatch 1.8m (Nov. 19.49-50p3)
K03U34X 2003 UX34 (arc=5 opp, H=20.2 ~309m) from Spacewatch 0.9m (Nov. 19.21-25p3)
K02X40A 2002 XA40 (arc=5 opp, H=17.0 ~1.35 km) from Spacewatch 0.9m (Nov. 19.49-53p3)
K02U03N 2002 UN3 (arc=5 opp, H=18.6 ~645m) from CSS (Nov. 19.38-41p4)
K02N16W 2002 NW16 (arc=2 opp, H=18.0 ~851m) from Hamamatsu-Yuto Obs. (Nov. 19.46-50p4), Castelmartini Obs. (Nov. 19.75p3), and Thompsonville Obs. (Nov. 20.07-08p6)
K02A15T 2002 AT15 (i=36.4°, arc=3 opp, H=18.3 ~741m) from Spacewatch 0.9m (Nov. 19.50-54p3)
K01H08A 2001 HA8 (arc=3 opp, H=16.9 ~1.41 km) from Spacewatch 0.9m (Nov. 19.37-40p3)
K01D03B 2001 DB3 (Q=4.185 AU, arc=4 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (Nov. 19.50-52p3)
J99Y00C 1999 YC (i=38.2°, q=0.241 AU, arc=8 opp, H=17.1 ~1.29 km) from LINEAR (Nov. 19.26-30p4)
L7807 217807 2000 XK44 from CSS (Nov. 19.39-41p4)
L6689 216689 2004 HM1 from LINEAR (Nov. 19.25-29p4)
F4244 154244 2002 KL6 from MLS (Nov. 19.19-21p4)
F2828 152828 1999 VT25 from MLS (Nov. 19.24-25p3)
D8852 138852 2000 WN10 from La Sagra Obs. (Nov. 18.94-96p3), LINEAR (Nov. 19.25-30p5), and Goodricke-Pigott Obs. (Nov. 19.27-30p2)
D7805 137805 1999 YK5 from CSS (Nov. 19.46-48p4)
85628 85628 1998 KV2 from CSS (Nov. 19.48-50p3)
54401 54401 2000 LM from CSS (Nov. 19.18-20p4)
36284 36284 2000 DM8 from Castelmartini Obs. (Nov. 19.70p3)
35396 35396 1997 XF11 from LINEAR (Nov. 19.31-36p5)
22771 22771 1999 CU3 from Castelmartini Obs. (Nov. 19.75-76p3)
20790 20790 2000 SE45 from CSS (Nov. 19.19-21p4)
12711 12711 Tukmit (1991 BB) from Castelmartini Obs. (Nov. 19.71p2)
10150 10150 1994 PN from La Sagra Obs. (Nov. 19.12-15p3)
09202 9202 1993 PB from Castelmartini Obs. (Nov. 19.72p3)
04015 4015 Wilson-Harrington (1979 VA) from Hamamatsu-Yuto Obs. (Nov. 18.37-39p2 & 19.38-39p3), Cordell-Lorenz Obs. (Nov. 19.07-12p5), and Nazaret Obs. (Nov. 19.84p3)
03361 3361 Orpheus (1982 HR) from LINEAR (Nov. 19.14-17p3)

Observers on 20 November '09

A total of 27 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2009-W47 -- 2009 WJ6
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 3 in MPECs 2009-W49, 2009-W50 & 2009-W51 -- 2009 WW7, 2009 WV7, 2009 VZ25
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2009-W47 -- 2005 RQ6
`A74`	Bergen-Enkheim Obs. in Germany, 1 in MPEC 2009-W47 -- 2009 WJ6
`160`	Castelmartini Obs. in Italy, 5 in MPEC 2009-W47 -- 2002 NW16, 36284, 22771, 12711, 9202
`703`	Catalina Sky Survey (CSS) in Arizona, 11 in MPECs 2009-W47 & 2009-W50 -- 2009 WV7, 2009 WO6, 2009 UM3, 2009 ST19, 2007 BG29, 2002 UN3, 85628, 54401, 217807, 20790, 137805
`G58`	Chabot Obs. in northern California, 3 in MPEC 2009-W47 -- 2009 VS44, 2009 VR44, 2007 BX48
`850`	Cordell-Lorenz Obs. in Tennessee, 3 in MPECs 2009-W47, 2009-W48 & 2009-W54 -- 2009 WZ7, 1998 HJ3, 4015
`113`	Drebach Obs. in Germany, 1 in MPEC 2009-W47 -- 2009 WX6
`683`	Goodricke-Pigott Obs. in Arizona, 1 in MPEC 2009-W47 -- 138852
`J95`	Great Shefford Obs. in England, 1 in MPEC 2009-W47 -- 2009 WJ6
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-W47 -- 2009 UV18, 2009 RN, 2005 RQ6, 2002 NW16, 4015
`704`	LINEAR in New Mexico, 16 in MPECs 2009-W47, 2009-W48, 2009-W52, 2009-W53, 2009-W54 & 2009-W56 -- 2009 WZ7, 2009 WY7, 2009 WX7, 2009 WN8, 2009 WN, 2009 WB, 2009 UW18, 2009 TM10, 2009 QD34, 2005 QL, 1999 YC, 1998 HJ3, 35396, 216689, 138852, 3361
`J75`	La Sagra Obs. in Spain, 3 in MPEC 2009-W47 -- 2009 KC3, 138852, 10150
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 8 in MPECs 2009-W48, 2009-W49, 2009-W50, 2009-W51, 2009-W52, 2009-W54, 2009-W55 & 2009-W57 -- 2009 WZ7, 2009 WX7, 2009 WW7, 2009 WV7, 2009 WO8, 2009 WM8, 2009 VZ25, 1998 HJ3
`118`	Modra Obs. in Slovakia, 2 in MPECs 2009-W48 & 2009-W54 -- 2009 WZ7, 1998 HJ3
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2009-W47, 2009-W51, 2009-W52, 2009-W53, 2009-W55, 2009-W56 & 2009-W57 -- 2009 WY7, 2009 WX7, 2009 WW7, 2009 WO8, 2009 WN8, 2009 WM8, 2009 WE, 2009 VA26, 2009 UW18, 154244, 152828
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2009-W47 -- 4015
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-W47 -- 2009 VZ, 2009 NA, 2009 MX6, 2006 UR, 2005 RQ6
`854`	Sabino Canyon Obs. in Arizona, 4 in MPECs 2009-W48, 2009-W50, 2009-W54 & 2009-W57 -- 2009 WZ7, 2009 WV7, 2009 WO8, 1998 HJ3
`B74`	Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-W47 -- 2009 ST19
`691`	Spacewatch 0.9m telescope in Arizona, 7 in MPECs 2009-W47 & 2009-W49 -- 2009 VZ25, 2009 QH2, 2009 KK8, 2003 UX34, 2002 XA40, 2002 AT15, 2001 HA8
`291`	Spacewatch 1.8m telescope in Arizona, 17 in MPECs 2009-W47, 2009-W49, 2009-W50 & 2009-W51 -- 2009 WW7, 2009 WV7, 2009 WP6, 2009 WM1, 2009 WJ1, 2009 VZ25, 2009 VN1, 2009 VJ24, 2009 VA26, 2009 UN1, 2008 GE1, 2005 YY93, 2005 LV7, 2005 EZ29, 2004 XK4, 2003 XF11, 2001 DB3
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2009-W50 -- 2009 WV7
`926`	Tenagra II Obs. in Arizona, 9 in MPECs 2009-W47, 2009-W48, 2009-W50, 2009-W51, 2009-W54 & 2009-W57 -- 2009 WZ7, 2009 WW7, 2009 WV7, 2009 WO8, 2009 WK1, 2009 WJ6, 2009 WF, 2009 WB, 1998 HJ3
`H53`	Thompsonville Obs. in Illinois, 7 in MPEC 2009-W47 -- 2009 UK28, 2009 SM103, 2009 NH, 2009 NA, 2008 WB59, 2005 RQ6, 2002 NW16
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-W48 -- 1998 HJ3

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

Impact Risk Monitoring on 20 November '09

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2321 and JPL at 2322 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 WY7	JPL Sentry	2322	2019-2108	43	8.1e-08	-6.48	-7.30	0	JPL: "Analysis based on 8 observations spanning 1.1107 days (2009-Nov-19.30256 to 2009-Nov-20.41322)." Diameter approximately 0.060 km. from mean, weighted H=23.8.

2009 WW7	JPL Sentry	1730	2042-2105	26	1.8e-05	-6.88	-7.09	0	JPL: "Analysis based on 25 observations spanning 1.1344 days (2009-Nov-19.23811 to 2009-Nov-20.37248)." Diameter approximately 0.006 km. from mean, weighted H=28.9.

2009 WD7	JPL Sentry	0248	2027-2106	22	1.7e-08	-8.09	-8.49	0	JPL: "Analysis based on 15 observations spanning .56236 days (2009-Nov-19.37112 to 2009-Nov-19.93348)." Diameter approximately 0.023 km. from mean, weighted H=25.9.

2009 WR6	NEODyS	1538	2043-2082	5	9.39e-10	-5.73	-6.06	0	NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2009/11/18.507 to 2009/11/19.464."

2009 WP6	JPL Sentry	1538	2067-2108	54	3.5e-05	-5.09	-5.44	0	JPL: "Analysis based on 18 observations spanning 1.9327 days (2009-Nov-18.25267 to 2009-Nov-20.18535)." Diameter approximately 0.015 km. from mean, weighted H=26.8.
2009 WP6	NEODyS	1538	2067-2090	30	2.9e-05	-5.16	-5.48	0	NEODyS: "Based on 18 optical observations (of which 0 are rejected as outliers) from 2009/11/18.253 to 2009/11/20.186."

2009 WK6	NEODyS	1538	2014-2066	9	2.99e-10	-5.66	-5.86	0	NEODyS: "Based on 26 optical observations (of which 0 are rejected as outliers) from 2009/11/17.429 to 2009/11/19.399."

2009 WJ6	NEODyS	1539	2049-2056	3	3.35e-05	-5.39	-5.40	0	NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2009/11/19.267 to 2009/11/20.098."
2009 WJ6	JPL Sentry	1538	2042-2056	3	3.2e-05	-5.40	-5.44	0	JPL: "Analysis based on 50 observations spanning .83074 days (2009-Nov-19.26657 to 2009-Nov-20.09731)." Diameter approximately 0.011 km. from mean, weighted H=27.5.

2009 WM1	JPL Sentry	1538	2018-2107	148	3.6e-05	-1.84	-2.24	0	JPL: "Analysis based on 27 observations spanning 2.0177 days (2009-Nov-17.4641 to 2009-Nov-19.48183)." Diameter approximately 0.277 km. from mean, weighted H=20.4.
2009 WM1	NEODyS	1538	2018-2090	73	2.29e-05	-2.00	-2.48	0	NEODyS: "Based on 27 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2009/11/19.483."

2009 WJ1	JPL Sentry	1538	2080-2103	4	1.7e-08	-6.09	-6.58	0	JPL: "Analysis based on 28 observations spanning 2.9779 days (2009-Nov-17.10881 to 2009-Nov-20.08676)." Diameter approximately 0.203 km. from mean, weighted H=21.1.
2009 WJ1	NEODyS	1538	2057-2080	4	3.13e-08	-5.69	-5.81	0	NEODyS: "Based on 28 optical observations (of which 0 are rejected as outliers) from 2009/11/17.110 to 2009/11/20.088."

2009 VA26	JPL Sentry	1538	2062	2	1.0e-09	-6.82	-6.94	0	JPL: "Analysis based on 44 observations spanning 8.8195 days (2009-Nov-11.38063 to 2009-Nov-20.20013)." Diameter approximately 0.220 km. from mean, weighted H=21.0.
2009 VA26	NEODyS	1538	R E M O V E D						-

1998 HJ3	JPL Sentry	1538	R E M O V E D						JPL: Risk listing removed at 1515 UTC.

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 20 November '09

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

2322	Noted that JPL Sentry has posted 2009 WY7 as an impact risk - see above
2000	Grabbed MPEC 2009-W57 - 2009 WO8 - see above
1923	Grabbed MPEC 2009-W55 - 2009 WM8 - see above Grabbed MPEC 2009-W56 - 2009 WN8 - see above
1730	Noted that JPL Sentry has posted 2009 WW7 as an impact risk - see above
1612	Grabbed MPEC 2009-W54 - 2009 WZ7 - see above
1538	Noted that JPL Sentry has removed 1998 HJ3 as an impact risk - see above Noted that JPL Sentry has updated its 2009 VA26 risk assessment - see above Noted that NEODyS has removed 2009 VA26 as an impact risk - see above Noted that JPL Sentry has updated its 2009 WJ1 risk assessment - see above Noted that NEODyS has updated its 2009 WJ1 risk assessment - see above Noted that JPL Sentry has updated its 2009 WJ6 risk assessment - see above Noted that NEODyS has posted 2009 WJ6 as an impact risk - see above Noted that NEODyS has posted 2009 WK6 as an impact risk - see above Noted that JPL Sentry has updated its 2009 WM1 risk assessment - see above Noted that NEODyS has updated its 2009 WM1 risk assessment - see above Noted that JPL Sentry has updated its 2009 WP6 risk assessment - see above Noted that NEODyS has posted 2009 WP6 as an impact risk - see above Noted that NEODyS has posted 2009 WR6 as an impact risk - see above Grabbed MPEC 2009-W47 - Daily Orbit Update - see above Grabbed MPEC 2009-W48 - 1998 HJ3 - see above Grabbed MPEC 2009-W49 - 2009 VZ25 - see above Grabbed MPEC 2009-W50 - 2009 WV7 - see above Grabbed MPEC 2009-W51 - 2009 WW7 - see above Grabbed MPEC 2009-W52 - 2009 WX7 - see above Grabbed MPEC 2009-W53 - 2009 WY7 - see above
0248	Noted that JPL Sentry has posted 2009 WD7 as an impact risk - see above

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