2009-11-28 Tracking News

Contents on 28 November '09

IAU Minor Planet Center
- NEOCP Activity -- four listings: 4 updated
- New MPECs -- two MPECs
Observers -- nine observing facilities
Impact Risk Monitoring -- five 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 28 November '09

The MPC's NEO Confirmation Page has 4 listings: 4 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four updated listings. Of these, three 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 28 November '09

Minor Planet Electronic Circulars

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

MPEC 2009-W134 time-stamped "07:13 UT" - Daily Orbit Update - see below
MPEC 2009-W135 time-stamped "17:55 UT" - 2009 WM139

MPEC 2009-W135 - "17:55 UT" - 2009 WM139

K09WD9M 2009 WM139 (H=18.5 ~676m) was discovered at 1217 UT on 27 Nov. by the Siding Spring Survey (SSS), which observed it at Nov. 27.51-55p4, 27.61p2, 27.67p2, 28.50p2, and 28.65p2.

<< DOU on 28 Nov. '09 >> MPEC 2009-W134 - "07:13 UT" - Daily Orbit Update

Observations of risk-listed objects
K09W54D 2009 WD54 (small asteroid, arc=2 days, H=28.5 ~7m) from the Mt. Lemmon Survey (MLS) (Nov. 26.24-26p4)
K09W01M 2009 WM1 (arc=10 days, H=20.4 ~282m) from MLS (Nov. 27.51-52p5)
K09W01J 2009 WJ1 (Q=4.111 AU, arc=11 days, H=21.2 ~195m) from the Spacewatch 1.8m telescope (Nov. 28.07-08p3)
Observations of recently (no longer) risk-listed objects
K09V26A 2009 VA26 from Spacewatch 1.8m (Nov. 27.30p1)
Observations of small asteroids (H>22.0)
K09WA5N 2009 WN105 (Q=4.400 AU, arc=3 days, H=22.2 ~123m) from Spacewatch 1.8m (Nov. 27.35-36p3)
K09W25V 2009 WV25 (arc=5 days, H=24.1 ~51m) from Hamamatsu-Yuto Obs. (Nov. 27.52-54p4)
K09W11B 2009 WB11 (arc=7 days, H=25.4 ~28m) from Spacewatch 1.8m (Nov. 27.44-45p3)
K09W00E 2009 WE (arc=10 days, H=22.3 ~117m) from MLS (Nov. 26.15-16p4)
K09V24J 2009 VJ24 (arc=19 days, H=22.1 ~129m) from Spacewatch 1.8m (Nov. 28.09-10p3)
K09U02F 2009 UF2 (Q=4.623 AU, arc=40 days, H=24.4 ~45m) from Spacewatch 1.8m (Nov. 27.33-34p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K09W11D 2009 WD11 (arc=7 days, H=21.8 ~148m) from Spacewatch 1.8m (Nov. 27.42-43p3)
K09V44Q 2009 VQ44 (q=0.368 AU, arc=11 days, H=21.9 ~141m) from MLS (Nov. 26.14p4)
Observations of other objects
K09WA4H 2009 WH104 (Q=4.021 AU, arc=2 days, H=21.0 ~214m) from MLS (Nov. 26.21-23p4)
K09W25P 2009 WP25 (q=0.319 AU, arc=5 days, H=19.7 ~389m) from MLS (Nov. 26.15-16p4)
K09W07F 2009 WF7 (arc=6 days, H=18.9 ~562m) from MLS (Nov. 25.29-30p4)
K09W01L 2009 WL1 (arc=10 days, H=18.4 ~708m) from the Catalina Sky Survey (CSS) (Nov. 27.28-30p3)
K09V00W 2009 VW (arc=15 days, H=21.6 ~162m) from La Sagra Obs. (Nov. 24.84-86p3)
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. 27.80-83p4)
K09U05P 2009 UP5 (arc=37 days, H=19.2 ~490m) from MLS (Nov. 26.06-07p4)
K09S02G 2009 SG2 (arc=68 days, H=20.0 ~339m) from MLS (Nov. 25.06-08p4)
K09Q34D 2009 QD34 (arc=92 days, H=18.0 ~851m) from MLS (Nov. 25.39-41p4)
K09N00A 2009 NA (Q=4.129 AU, arc=150 days, H=17.6 ~1.02 km) from Hamamatsu-Yuto Obs. (Nov. 27.68-72p9)
K09K08K 2009 KK8 (arc=182 days, H=18.8 ~589m) from the Spacewatch 0.9m telescope (Nov. 26.18-22p3)
K06X02G 2006 XG2 (arc=2 opp, H=20.3 ~295m) from Spacewatch 1.8m (Nov. 27.31-32p3)
K06W01N 2006 WN1 (arc=2 opp, H=18.7 ~616m) from MLS (Nov. 27.28-30p5)
K06V13G 2006 VG13 (arc=2 opp, H=21.5 ~170m) from Spacewatch 1.8m (Nov. 27.49-50p3)
K06U00R 2006 UR (arc=2 opp, H=19.2 ~490m) from Hamamatsu-Yuto Obs. (Nov. 27.72-76p10)
K05R06Q 2005 RQ6 (arc=2 opp, H=18.8 ~589m) from Hamamatsu-Yuto Obs. (Nov. 27.54-60p10)
K05M00C 2005 MC (Q=4.167 AU, arc=3 opp, H=16.4 ~1.78 km) from Hamamatsu-Yuto Obs. (Nov. 27.84-86p4)
K04X35M 2004 XM35 (arc=2 opp, H=19.7 ~389m) from CSS (Nov. 27.20-22p4)
K02U03N 2002 UN3 (arc=5 opp, H=18.7 ~616m) from CSS (Nov. 26.27-29p4)
J97Y03M 1997 YM3 (Q=5.450 AU, arc=3 opp, H=17.2 ~1.23 km) from MLS (Nov. 27.47-50p5 at V=21.4-22.5)
J90U00A 1990 UA (arc=4 opp, H=19.6 ~407m) from MLS (Nov. 27.28-30p3)
L5188 215188 2000 NM from CSS (Nov. 26.39-41p4 & 27.35-37p4)
K7945 207945 1991 JW from CSS (Nov. 27.48-51p4)
G2566 162566 2000 RJ34 from CSS (Nov. 26.52-53p4)
F2560 152560 1991 BN from CSS (Nov. 26.41-43p4 & 27.35-37p3)
E3404 143404 2003 BD44 from Spacewatch 0.9m (Nov. 26.18-22p3)
D8852 138852 2000 WN10 from Spacewatch 0.9m (Nov. 27.10-14p3)
99248 99248 2001 KY66 from CSS (Nov. 27.38-41p4)
96189 96189 Pygmalion (1991 NT3) from CSS (Nov. 26.27-30p5)
89959 89959 2002 NT7 from CSS (Nov. 27.51-52p4)
86067 86067 1999 RM28 from SSS (Nov. 27.68-70p4)
85839 85839 1998 YO4 from CSS (Nov. 27.48-50p4)
16064 16064 1999 RH27 from Spacewatch 0.9m (Nov. 26.52-54p3)
05131 5131 1990 BG from CSS (Nov. 26.44-47p8 & 27.45-47p4)
04055 4055 Magellan (1985 DO2) from CSS (Nov. 27.53-54p4)
04015 4015 Wilson-Harrington (1979 VA) from Gualba Obs. (Nov. 26.74-75p3)
03552 3552 Don Quixote (1983 SA) from Vicksburg Obs. (Nov. 24.01-02p3)
01864 1864 Daedalus (1971 FA) from CSS (Nov. 26.52-53p4 & 27.53-54p4)

Observers on 28 November '09

Nine observing facilities appear in today's MPECs.

Code	Observer / observatory
`703`	Catalina Sky Survey (CSS) in Arizona, 14 in MPEC 2009-W134 -- 2009 WL1, 2004 XM35, 2002 UN3, 99248, 96189, 89959, 85839, 215188, 207945, 162566, 152560, 5131, 4055, 1864
`442`	Gualba Obs. in Spain, 1 in MPEC 2009-W134 -- 4015
`379`	Hamamatsu-Yuto Obs. in Japan, 6 in MPEC 2009-W134 -- 2009 WV25, 2009 UV18, 2009 NA, 2006 UR, 2005 RQ6, 2005 MC
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2009-W134 -- 2009 VW
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 13 in MPEC 2009-W134 -- 2009 WP25, 2009 WM1, 2009 WH104, 2009 WF7, 2009 WE, 2009 WD54, 2009 VQ44, 2009 UP5, 2009 SG2, 2009 QD34, 2006 WN1, 1997 YM3, 1990 UA
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPECs 2009-W134 & 2009-W135 -- 2009 WM139, 86067
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2009-W134 -- 2009 KK8, 16064, 143404, 138852
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPEC 2009-W134 -- 2009 WN105, 2009 WJ1, 2009 WD11, 2009 WB11, 2009 VJ24, 2009 VA26, 2009 UF2, 2006 XG2, 2006 VG13
`H47`	Vicksburg Obs. in Mississippi, 1 in MPEC 2009-W134 -- 3552

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

Impact Risk Monitoring on 28 November '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 WO106	NEODyS	1648	2011-2078	24	4.73e-09	-4.54	-4.77	0	NEODyS: "Based on 25 optical observations (of which 0 are rejected as outliers) from 2009/11/26.509 to 2009/11/27.546."

2009 WF106	NEODyS	1648	2020-2072	5	6.6e-10	-5.69	-5.88	0	NEODyS: "Based on 33 optical observations (of which 1 are rejected as outliers) from 2009/11/25.409 to 2009/11/27.469."

2009 WD54	JPL Sentry	1648	R E M O V E D						JPL: Risk listing removed at 1130 UTC.

2009 WM1	NEODyS	1648	2018-2086	77	3.92e-05	-1.67	-1.76	1	NEODyS: "Based on 67 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2009/11/27.518. NOTE: The Virtual Impactor in 2027/11/23.217 ... is rated as Torino Scale 1."

2009 WJ1	JPL Sentry	1648	2078	1	5.8e-09	-6.43	-6.43	0	JPL: "Analysis based on 46 observations spanning 10.967 days (2009-Nov-17.10881 to 2009-Nov-28.07621)." Diameter approximately 0.200 km. from mean, weighted H=21.1.
2009 WJ1	NEODyS	1648	R E M O V E D						-

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 28 November '09

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

1816

Grabbed MPEC 2009-W135 - 2009 WM139 - see above

1648

Noted that JPL Sentry has removed 2009 WD54 as an impact risk - see above
Noted that NEODyS has posted 2009 WF106 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WJ1 risk assessment - see above
Noted that NEODyS has removed 2009 WJ1 as an impact risk - see above
Noted that NEODyS has updated its 2009 WM1 risk assessment - see above
Noted that NEODyS has posted 2009 WO106 as an impact risk - see above
Grabbed MPEC 2009-W134 - Daily Orbit Update - see above

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