2008-11-22 Tracking News

Contents on 22 November '08

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 new
- New MPECs -- six MPECs
Observers -- 23 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 22 November '08

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

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new listing. This was a "one nighter." So far The Tracking News has counted a total of nine objects listed 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 22 November '08

Minor Planet Electronic Circulars

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

MPEC 2008-W48 time-stamped "01:00 UT" - 2008 WK32 - see below
MPEC 2008-W49 time-stamped "01:18 UT" - 2008 WM32 - see below
MPEC 2008-W50 time-stamped "07:08 UT" - Daily Orbit Update - see below
MPEC 2008-W51 time-stamped "13:45 UT" - 2008 WW32 - see below
MPEC 2008-W52 time-stamped "13:48 UT" - 2008 WX32 - see below
MPEC 2008-W53 time-stamped "13:51 UT" - 2008 WY32

MPEC 2008-W53 - "13:51 UT" - 2008 WY32

K08W32Y 2008 WY32 (small asteroid, H=22.2 ~123m) was discovered at 0412 UT on 22 Nov. by the Mt. Lemmon Survey (MLS), which observed it at Nov. 22.18-25p11.

MPEC 2008-W52 - "13:48 UT" - 2008 WX32

K08W32X 2008 WX32 (H=18.5 ~676m) was discovered at 0741 UT on 21 Nov. by MLS, which observed it at Nov. 21.29-32p6, 21.39p2, and 21.46p1. The discovery was confirmed by the Spacewatch 1.8m telescope (Nov. 21.41-42p3 & 22.19-20p3) and Sandlot Obs. (Nov. 22.32-33p2).

MPEC 2008-W51 - "13:45 UT" - 2008 WW32

K08W32W 2008 WW32 (risk-listed, H=21.4 ~178m) was discovered at 0305 UT on 21 Nov. by MLS, which observed it at Nov. 21.13-19p9. The discovery was confirmed by Spacewatch 1.8m (Nov. 22.16-17p3).

<< DOU on 22 Nov. '08 >> MPEC 2008-W50 - "07:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08W14D 2008 WD14 (small asteroid, arc=1 day, H=22.7 ~98m) from Spacewatch 1.8m (Nov. 22.09-12p6)
K08W14A 2008 WA14 (small asteroid, arc=2 days, H=22.9 ~89m) from Spacewatch 1.8m (Nov. 22.23-25p6)
K08W13Z 2008 WZ13 (arc=2 days, H=18.4 ~708m) from Spacewatch 1.8m (Nov. 22.25-26p3)
K08W13Y 2008 WY13 (Q=4.583 AU, arc=2 days, H=21.4 ~178m) from Spacewatch 1.8m (Nov. 22.27-28p3)
K08W02O 2008 WO2 (small asteroid, arc=1 day, H=29.8 ~4m) from MLS (Nov. 21.29p4 at V=21.6-22.6 & 21.38p4 at V=21.0-22.4)
K08W01P 2008 WP1 (arc=3 days, H=20.1 ~323m) from Spacewatch 1.8m (Nov. 21.08-09p3 & 22.18-19p3)
K08V14L 2008 VL14 (arc=12 days, H=21.1 ~204m) from David Tholen's team on Mauna Kea (Nov. 20.37p4)
Observations of recently (no longer) risk-listed objects
K08W00C 2008 WC (small asteroid, arc=2 days, H=26.3 ~19m) from Astronomical Research Obs. (ARO) (Nov. 20.06p3)
K08V14H 2008 VH14 (small asteroid, Q=4.722 AU, arc=13 days, H=23.2 ~78m) from Desert Moon Obs. (Nov. 21.20-23p3) and MLS (Nov. 21.23-24p3)
K08V03Z 2008 VZ3 (small asteroid, arc=14 days, H=24.4 ~45m) from ARO (Nov. 20.08-09p8)
K08V00E 2008 VE (small asteroid, Q=4.408 AU, arc=19 days, H=22.2 ~123m) from ARO (Nov. 20.17-18p3)
K08U07E 2008 UE7 (arc=26 days, H=20.5 ~269m) from Lumezzane Obs. (Nov. 20.03-04p4), ARO (Nov. 20.15-16p5), and Petit Jean Mtn. South Obs. (PJMSO) (Nov. 21.39-40p6)
K08U05W 2008 UW5 (arc=25 days, H=18.1 ~812m) from ARO (Nov. 20.02-03p3)
Observations of small asteroids (H>22.0)
K08W02Q 2008 WQ2 (arc=1 day, H=24.2 ~49m) from the Catalina Sky Survey (CSS) (Nov. 21.25-28p4)
K08W02P 2008 WP2 (arc=1 day, H=25.0 ~34m) from LINEAR (Nov. 21.25-37p10)
K08W00K 2008 WK (arc=2 days, H=23.0 ~85m) from ARO (Nov. 20.14-15p4)
K08W00E 2008 WE (arc=2 days, H=25.9 ~22m) from ARO (Nov. 20.12-13p3)
K08W00D 2008 WD (arc=3 days, H=25.8 ~23m) from LINEAR (Nov. 20.26-29p4), MLS (Nov. 21.22p3), Sabino Canyon Obs. (Nov. 21.29-30p3), Jim Young via Table Mtn. Obs. (Nov. 21.36-38p4), ARO (Nov. 21.40p3), and Sandlot Obs. (Nov. 21.40-41p6)
K08U99T 2008 UT99 (arc=22 days, H=24.4 ~45m) from Spacewatch 1.8m (Nov. 21.46-47p3)
Observations of other objects
K08W32L 2008 WL32 (q=1.591 AU, arc=2 opp, H=18.2 ~776m) from the Spacewatch 0.9m telescope (Nov. 6.33-36p3), LINEAR (Nov. 21.35-37p3 discovery), Farra d'Isonzo Obs. (Nov. 21.95-96p3), Calar Alto Obs. (Nov. 21.95-96p3), and Great Shefford Obs. (Nov. 21.96-97p2)
K08W14C 2008 WC14 (Q=5.116 AU, arc=1 day, H=19.9 ~355m) from ARO (Nov. 21.42-43p3)
K08W00N 2008 WN (arc=2 days, H=18.4 ~708m) from Spacewatch 1.8m (Nov. 21.22-23p2)
K08W00B 2008 WB (i=44.1°, arc=3 days, H=21.0 ~214m) from ARO (Nov. 20.05p4)
K08V04U 2008 VU4 (Q=4.196 AU, arc=14 days, H=17.5 ~1.07 km) from PJMSO (Nov. 21.40-41p6)
K08V04Q 2008 VQ4 (arc=17 days, H=19.2 ~490m) from Modra Obs. (Nov. 5.76-77p2) and Desert Moon Obs. (Nov. 21.10-17p3)
K08V00F 2008 VF (arc=20 days, H=19.5 ~426m) from Lumezzane Obs. (Nov. 20.00-01p4), ARO (Nov. 20.16-17p5), and PJMSO (Nov. 21.41-42p7)
K08T04F 2008 TF4 (arc=45 days, H=19.3 ~467m) from ARO (Nov. 20.13-15p3)
K08T02R 2008 TR2 (arc=46 days, H=19.9 ~355m) from ARO (Nov. 20.03-04p3)
K08T02Q 2008 TQ2 (arc=49 days, H=20.8 ~234m) from Desert Moon Obs. (Nov. 21.42-46p3)
K08S82J 2008 SJ82 (arc=56 days, H=20.6 ~257m) from Desert Moon Obs. (Nov. 21.33-39p3)
K08S07V 2008 SV7 (arc=57 days, H=21.6 ~162m) from ARO (Nov. 20.31-32p3)
K08S07P 2008 SP7 (Q=4.200 AU, arc=59 days, H=19.0 ~537m) from ARO (Nov. 20.11p2) and PJMSO (Nov. 21.34p5)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.4 ~708m) from Thompsonville Obs. (Nov. 22.15-16p6)
K08S01N 2008 SN1 (Q=4.025 AU, arc=61 days, H=19.6 ~407m) from ARO (Nov. 20.11-12p3)
K08S00Q 2008 SQ (arc=60 days, H=19.6 ~407m) from ARO (Nov. 20.10p1)
K08S00E 2008 SE (arc=61 days, H=19.4 ~446m) from ARO (Nov. 20.13p1)
K08Q00Y 2008 QY (arc=2 opp, H=18.5 ~676m) from ARO (Nov. 20.11-12p3)
K08Q00C 2008 QC (arc=92 days, H=20.7 ~245m) from ARO (Nov. 20.05-07p3 at V=22.1-2)
K08N00U 2008 NU (Q=4.202 AU, arc=143 days, H=17.5 ~1.07 km) from CSS (Nov. 21.15-18p4)
K08M00Z 2008 MZ (Q=4.207 AU, arc=159 days, H=18.6 ~645m) from ARO (Nov. 20.17p1) and PJMSO (Nov. 21.38-39p6)
K08E05V 2008 EV5 (arc=2 opp, H=19.8 ~371m) from the Siding Spring Survey (SSS) (Nov. 20.74-75p3)
K07VO3L 2007 VL243 (i=43.3°, q=0.262 AU, arc=2 opp, H=17.8 ~933m) from SSS (Nov. 20.73p1)
K06SL7Z 2006 SZ217 (arc=3 opp, H=17.3 ~1.17 km) from PJMSO (Nov. 21.42-43p6)
K05W01D 2005 WD1 (i=43.1°, arc=3 opp, H=16.7 ~1.55 km) from CSS (Nov. 21.22-24p4)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from CSS (Nov. 21.18-21p4)
K04T19L 2004 TL19 (arc=2 opp, H=20.6 ~257m) from CSS (Nov. 21.26-28p4)
K04F11H 2004 FH11 (arc=4 opp, H=16.8 ~1.48 km) from ARO (Nov. 20.26-29p3)
K03W25X 2003 WX25 (Q=4.606 AU, arc=2 opp, H=18.6 ~645m) from Lumezzane Obs. (Nov. 19.85-86p4) and LINEAR (Nov. 21.19-24p5)
K01X00Q 2001 XQ (Q=6.249 AU, arc=2 opp, H=19.2 ~490m) from CSS (Nov. 21.48-50p4)
K01V76C 2001 VC76 (arc=2 opp, H=19.7 ~389m) from MLS (Nov. 21.26-28p3)
K01T01W 2001 TW1 (arc=5 opp, H=19.2 ~490m) from CSS (Nov. 21.19-21p4)
K01L05M 2001 LM5 (arc=3 opp, H=19.3 ~467m) from Lumezzane Obs. (Nov. 20.03p4) and PJMSO (Nov. 21.35p6)
J96T09E 1996 TE9 (arc=3 opp, H=18.8 ~589m) from Lumezzane Obs. (Nov. 19.80-81p4)
J9801 199801 2007 AE12 from Schiaparelli Obs. (Nov. 15.13-14p5)
J0166 190166 2005 UP156 from Spacewatch 0.9m (Nov. 21.17-20p3)
J0135 190135 2005 QE30 from LINEAR (Nov. 21.06-10p3)
I5851 185851 2000 DP107 from CSS (Nov. 21.15-18p4)
G3373 163373 2002 PZ39 from Spacewatch 1.8m (Nov. 21.38-39p3)
G2900 162900 2001 HG31 from LINEAR (Nov. 21.25-37p10) and Thompsonville Obs. (Nov. 22.22-23p6)
G2679 162679 2000 TK1 from Lumezzane Obs. (Nov. 19.79-80p4)
G2004 162004 1991 VE from Spacewatch 0.9m (Nov. 21.49-52p3)
E1052 141052 2001 XR1 from CSS (Nov. 21.39-41p4)
D7805 137805 1999 YK5 from Thompsonville Obs. (Nov. 22.03-05p6)
D7799 137799 1999 YB from LINEAR (Nov. 21.26-31p5)
D7052 137052 1998 VO33 from Spacewatch 0.9m (Nov. 21.44-48p3)
D6923 136923 1998 JH2 from Spacewatch 0.9m (Nov. 21.43-47p3)
D6773 136773 1996 TR6 from CSS (Nov. 21.32-34p4)
85774 85774 1998 UT18 from Schiaparelli Obs. (Nov. 15.15p5), MLS (Nov. 21.42-44p4), and CSS (Nov. 21.45-47p4)
53430 53430 1999 TY16 from Lulin Minor Bodies Tracking (LIMIT) (Nov. 14.66-77p10 & 17.72-85p10), Schiaparelli Obs. (Nov. 15.17-18p5), and Thompsonville Obs. (Nov. 22.18-19p6)
31221 31221 1998 BP26 from Inastars Obs. (Nov. 21.74-76p4)
13651 13651 1997 BR from CSS (Nov. 21.32-34p4)
12538 12538 1998 OH from CSS (Nov. 21.09-11p4)
08567 8567 1996 HW1 from Thompsonville Obs. (Nov. 22.19-21p6)
07358 7358 Oze (1995 YA3) from MLS (Nov. 21.40-41p4)
07335 7335 1989 JA from Lumezzane Obs. (Nov. 20.01-02p3) and Spacewatch 0.9m (Nov. 21.26-30p3)
06569 6569 Ondaatje (1993 MO) from ARO (Nov. 20.30-31p3)
06178 6178 1986 DA from MLS (Nov. 21.20-22p4)
05143 5143 Heracles (1991 VL) from LINEAR (Nov. 21.14-19p5)
05011 5011 Ptah (6743 P-L) from MLS (Nov. 21.10-11p4)
04183 4183 Cuno (1959 LM) from LINEAR (Nov. 21.19-25p5)
03360 3360 Syrinx (1981 VA) from Lumezzane Obs. (Nov. 19.77p4) and Thompsonville Obs. (Nov. 22.06p6)
02608 2608 Seneca (1978 DA) from ARO (Nov. 20.21-23p2 at V=21.9-22.1)
02212 2212 Hephaistos (1978 SB) from LINEAR (Nov. 21.32-37p5)
01863 1863 Antinous (1948 EA) from CSS (Nov. 21.51-52p4)
01627 1627 Ivar (1929 SH) from Thompsonville Obs. (Nov. 22.16-18p6)

MPEC 2008-W49 - "01:18 UT" - 2008 WM32

K08W32M 2008 WM32 (i=39.3°, Q=5.031 AU, H=19.6 ~407m) was discovered at 0910 UT on 21 Nov. by CSS, which observed it at Nov. 21.35-38p8. The discovery was confirmed by Sandlot Obs. (Nov. 21.44p3), Young/Table Mtn. (Nov. 21.46-47p4), ARO (Nov. 21.47p3), and Calar Alto Obs. (Nov. 22.04p3).

MPEC 2008-W48 - "01:00 UT" - 2008 WK32

K08W32K 2008 WK32 (risk-listed, H=19.5 ~426m) was discovered at 0754 UT on 21 Nov. by Spacewatch 1.8m, which observed it at Nov. 21.33-37p6 and 21.43-44p3. The discovery was confirmed by Sandlot Obs. (Nov. 21.42-43p2) and Bergen-Enkheim Obs. (Nov. 21.91-93p3).

Observers on 22 November '08

A total of 23 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 25 in MPECs 2008-W49 & 2008-W50 -- 2008 WM32, 2008 WK, 2008 WE, 2008 WD, 2008 WC14, 2008 WC, 2008 WB, 2008 VZ3, 2008 VF, 2008 VE, 2008 UW5, 2008 UE7, 2008 TR2, 2008 TF4, 2008 SV7, 2008 SQ, 2008 SP7, 2008 SN1, 2008 SE, 2008 QY, 2008 QC, 2008 MZ, 2004 FH11, 6569, 2608
`A74`	Bergen-Enkheim Obs. in Germany, 1 in MPEC 2008-W48 -- 2008 WK32
`493`	Calar Alto Obs. in Spain, 2 in MPECs 2008-W49 & 2008-W50 -- 2008 WM32, 2008 WL32
`703`	Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2008-W49 & 2008-W50 -- 2008 WQ2, 2008 WM32, 2008 NU, 2005 WD1, 2005 TZ51, 2004 TL19, 2001 XQ, 2001 TW1, 85774, 185851, 141052, 136773, 13651, 12538, 1863
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-W50 -- 2008 VQ4, 2008 VH14, 2008 TQ2, 2008 SJ82
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-W50 -- 2008 WL32
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-W50 -- 2008 WL32
`B15`	Inastars Obs. in Germany, 1 in MPEC 2008-W50 -- 31221
`704`	LINEAR in New Mexico, 10 in MPEC 2008-W50 -- 2008 WP2, 2008 WL32, 2008 WD, 2003 WX25, 190135, 162900, 137799, 5143, 4183, 2212
`D35`	Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2008-W50 -- 53430
`130`	Lumezzane Obs. in Italy, 8 in MPEC 2008-W50 -- 2008 VF, 2008 UE7, 2003 WX25, 2001 LM5, 1996 TE9, 162679, 7335, 3360
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-W50 -- 2008 VL14
`118`	Modra Obs. in Slovakia, 1 in MPEC 2008-W50 -- 2008 VQ4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-W50, 2008-W51, 2008-W52 & 2008-W53 -- 2008 WY32, 2008 WX32, 2008 WW32, 2008 WO2, 2008 WD, 2008 VH14, 2001 VC76, 85774, 7358, 6178, 5011
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2008-W50 -- 2008 VU4, 2008 VF, 2008 UE7, 2008 SP7, 2008 MZ, 2006 SZ217, 2001 LM5
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-W50 -- 2008 WD
`H36`	Sandlot Obs. in Kansas, 4 in MPECs 2008-W48, 2008-W49, 2008-W50 & 2008-W52 -- 2008 WX32, 2008 WM32, 2008 WK32, 2008 WD
`204`	Schiaparelli Obs. in Italy, 3 in MPEC 2008-W50 -- 85774, 53430, 199801
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-W50 -- 2008 EV5, 2007 VL243
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2008-W50 -- 2008 WL32, 190166, 162004, 137052, 136923, 7335
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2008-W48, 2008-W50, 2008-W51 & 2008-W52 -- 2008 WZ13, 2008 WY13, 2008 WX32, 2008 WW32, 2008 WP1, 2008 WN, 2008 WK32, 2008 WD14, 2008 WA14, 2008 UT99, 163373
`6735`	Jim Young via Table Mtn. Obs. in southern California, 2 in MPECs 2008-W49 & 2008-W50 -- 2008 WM32, 2008 WD
`H53`	Thompsonville Obs. in Illinois, 7 in MPEC 2008-W50 -- 2008 SQ1, 53430, 162900, 137805, 8567, 3360, 1627

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

Impact Risk Monitoring on 22 November '08

**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.
Note that the time horizon for JPL is 100 years from today and for NEODyS is usually the year 2090.
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

2008 WW32	JPL Sentry	1710	2023-2080	13	5.5e-09	-6.41	-6.96	0	JPL: "Analysis based on 12 observations spanning 1.0426 days (2008-Nov-21.12895 to 2008-Nov-22.17155)." Diameter approximately 0.157 km. from mean, weighted H=21.7.

2008 WK32	NEODyS	1530	2065-2073	2	4.55e-10	-6.74	-6.99	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/11/21.330 to 2008/11/21.931."
2008 WK32	JPL Sentry	0503	2037-2089	5	1.5e-09	-6.21	-6.73	0	JPL: "Analysis based on 14 observations spanning .60095 days (2008-Nov-21.32959 to 2008-Nov-21.93054)." Diameter approximately 0.350 km. from mean, weighted H=19.9.

2008 WJ14	NEODyS	1530	2071	1	4.43e-11	-11.14	-11.14	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2008/11/21.362 to 2008/11/21.464."

2008 WD14	JPL Sentry	1529	2086-2107	3	2.4e-08	-6.84	-6.85	0	JPL: "Analysis based on 18 observations spanning 1.0296 days (2008-Nov-21.09428 to 2008-Nov-22.12383)." Diameter approximately 0.100 km. from mean, weighted H=22.6.

2008 WA14	JPL Sentry	1529	R E M O V E D						JPL: Risk listing removed at 0954 UTC.

2008 WZ13	NEODyS	1530	2012-2090	121	3.49e-07	-2.83	-3.16	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/11/20.276 to 2008/11/22.261."
2008 WZ13	JPL Sentry	1529	2020-2108	110	3.0e-07	-3.30	-4.19	0	JPL: "Analysis based on 20 observations spanning 1.9842 days (2008-Nov-20.27557 to 2008-Nov-22.2598)." Diameter approximately 0.662 km. from mean, weighted H=18.5.

2008 WY13	NEODyS	1530	2064-2086	7	2.7e-08	-5.60	-5.81	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/11/20.275 to 2008/11/22.278."
2008 WY13	JPL Sentry	1529	2064-2107	17	1.1e-07	-5.10	-5.64	0	JPL: "Analysis based on 20 observations spanning 2.0032 days (2008-Nov-20.27393 to 2008-Nov-22.27709)." Diameter approximately 0.183 km. from mean, weighted H=21.3.

2008 WO2	NEODyS	1530	2074-2089	4	3.86e-07	-9.08	-9.21	0	NEODyS: "Based on 24 optical observations (of which 0 are rejected as outliers) from 2008/11/20.219 to 2008/11/21.383."
2008 WO2	JPL Sentry	1529	2065-2095	9	2.0e-05	-7.40	-7.64	0	JPL: "Analysis based on 24 observations spanning 1.1647 days (2008-Nov-20.21777 to 2008-Nov-21.38252)." Diameter approximately 0.004 km. from mean, weighted H=29.8.

2008 WP1	NEODyS	1530	R E M O V E D						-
2008 WP1	JPL Sentry	1529	R E M O V E D						JPL: Risk listing removed at 0949 UTC.

2008 VL14	NEODyS	1530	2071-2079	4	8.95e-07	-3.89	-4.17	0	NEODyS: "Based on 45 optical observations (of which 1 are rejected as outliers) from 2008/11/09.266 to 2008/11/21.109."
2008 VL14	JPL Sentry	1529	2071-2076	3	8.7e-07	-3.90	-4.18	0	JPL: "Analysis based on 44 observations spanning 11.842 days (2008-Nov-09.2656 to 2008-Nov-21.10802)." Diameter approximately 0.201 km. from mean, weighted H=21.1.

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 22 November '08

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

1710	Noted that JPL Sentry has posted 2008 WW32 as an impact risk - see above
1530	Noted that NEODyS has updated its 2008 VL14 risk assessment - see above Noted that NEODyS has posted 2008 WJ14 as an impact risk - see above Noted that NEODyS has posted 2008 WK32 as an impact risk - see above Noted that NEODyS has posted 2008 WO2 as an impact risk - see above Noted that NEODyS has removed 2008 WP1 as an impact risk - see above Noted that NEODyS has posted 2008 WY13 as an impact risk - see above Noted that NEODyS has posted 2008 WZ13 as an impact risk - see above Grabbed MPEC 2008-W50 - Daily Orbit Update - see above Grabbed MPEC 2008-W51 - 2008 WW32 - see above Grabbed MPEC 2008-W52 - 2008 WX32 - see above Grabbed MPEC 2008-W53 - 2008 WY32 - see above
1529	Noted that JPL Sentry has updated its 2008 VL14 risk assessment - see above Noted that JPL Sentry has removed 2008 WA14 as an impact risk - see above Noted that JPL Sentry has posted 2008 WD14 as an impact risk - see above Noted that JPL Sentry has updated its 2008 WO2 risk assessment - see above Noted that JPL Sentry has removed 2008 WP1 as an impact risk - see above Noted that JPL Sentry has updated its 2008 WY13 risk assessment - see above Noted that JPL Sentry has updated its 2008 WZ13 risk assessment - see above
0503	Noted that JPL Sentry has posted 2008 WK32 as an impact risk - see above
0202	Grabbed MPEC 2008-W48 - 2008 WK32 - see above Grabbed MPEC 2008-W49 - 2008 WM32 - see above

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