2009-11-26 Tracking News

Contents on 26 November '09

IAU Minor Planet Center
- NEOCP Activity -- 17 listings: 4 new, 13 updated
- New MPECs -- two MPECs
Observers -- 22 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 26 November '09

The MPC's NEO Confirmation Page has 17 listings: 4 new, 13 updated

When last checked at 2359 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had four new and thirteen updated listings. Of these, nine were "one nighters." So far The Tracking News has counted a total of 25 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 26 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-W117 time-stamped "00:21 UT" - 2009 WN105 - see below
MPEC 2009-W118 time-stamped "07:13 UT" - Daily Orbit Update

<< DOU on 26 Nov. '09 >> MPEC 2009-W118 - "07:13 UT" - Daily Orbit Update

Observations of risk-listed objects
K09WA5A 2009 WA105 (small asteroid, arc=0 days, H=23.9 ~56m) from LINEAR (Nov. 25.20-24p4)
K09W52R 2009 WR52 (small asteroid, arc=3 days, H=28.3 ~7m) from the Spacewatch 1.8m telescope (Nov. 25.41-42p3 & 26.13-14p3)
K09W52Q 2009 WQ52 (small asteroid, Q=4.244 AU, arc=3 days, H=28.1 ~8m) from Great Shefford Obs. (Nov. 25.81-84p4)
K09W25N 2009 WN25 (i=71.6°, Q=5.007 AU, arc=4 days, H=18.3 ~741m) from Alter Satzberg Obs. (Nov. 25.72-74p5) and Atlante Obs. (Nov. 25.86-87p3)
K09W01M 2009 WM1 (arc=8 days, H=20.4 ~282m) from Spacewatch 1.8m (Nov. 25.48-49p3)
Observations of recently (no longer) risk-listed objects
K09W07D 2009 WD7 (small asteroid, arc=4 days, H=25.7 ~25m) from the Spacewatch 0.9m telescope (Nov. 23.22-24p2)
K09W00F 2009 WF (arc=9 days, H=19.8 ~371m) from LINEAR (Nov. 25.32-37p6), Petit Jean Mtn. South Obs. (PJMSO) (Nov. 25.35-36p7), and Desert Moon Obs. (Nov. 25.45-47p4)
K09W00B 2009 WB (small asteroid, arc=7 days, H=24.2 ~49m) from Spacewatch 0.9m (Nov. 22.11-15p3)
K09U18V 2009 UV18 (Q=5.187 AU, arc=2 opp, H=15.5 ~2.69 km, q=1.167 AU) from PJMSO (Nov. 25.43-44p6) and Hamamatsu-Yuto Obs. (Nov. 25.75-78p7)
Observations of small asteroids (H>22.0)
K09WA5B 2009 WB105 (i=38.4°, arc=0 days, H=23.3 ~74m) from LINEAR (Nov. 25.19-24p5)
K09W54A 2009 WA54 (arc=1 day, H=26.8 ~15m) from Tenagra II Obs. (Nov. 24.50p2)
K09W52D 2009 WD52 (arc=3 days, H=24.9 ~35m) from the Mt. Lemmon Survey (MLS) (Nov. 25.33-35p4)
K09W25V 2009 WV25 (arc=4 days, H=24.1 ~51m) from Doc Greiner Research Obs. (DGRO) (Nov. 23.06p3), PJMSO (Nov. 25.24-25p13), Desert Moon Obs. (Nov. 25.27-28p4), MLS (Nov. 25.33-35p4), and Sandlot Obs. (Nov. 26.26p4)
K09W25T 2009 WT25 (arc=4 days, H=23.0 ~85m) from Spacewatch 0.9m (Nov. 25.33-37p3)
K09V44R 2009 VR44 (arc=10 days, H=25.0 ~34m) from Spacewatch 0.9m (Nov. 23.20-23p3) and MLS (Nov. 25.43-45p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K09W51Y 2009 WY51 (Q=4.354 AU, arc=3 days, H=21.8 ~148m) from the Catalina Sky Survey (CSS) (Nov. 25.33-37p4) and Desert Moon Obs. (Nov. 25.38-42p3)
K09W11D 2009 WD11 (arc=5 days, H=21.9 ~141m) from Spacewatch 0.9m (Nov. 25.34-36p2)
K09W11C 2009 WC11 (arc=5 days, H=22.0 ~135m) from Spacewatch 1.8m (Nov. 25.30-31p3)
K09V44Q 2009 VQ44 (q=0.369 AU, arc=11 days, H=21.9 ~141m) from Spacewatch 1.8m (Nov. 26.25-26p3)
K09U87S 2009 US87 (arc=33 days, H=21.9 ~141m) from Spacewatch 0.9m (Nov. 24.24-28p3) and Desert Moon Obs. (Nov. 25.31-34p3)
J96X27B 1996 XB27 (arc=4 opp, H=22.0 ~135m) from Spacewatch 1.8m (Nov. 25.28-29p2)
Observations of other objects
K09WA4Z 2009 WZ104 (arc=1 day, H=20.5 ~269m) from Balzaretto Obs. (Nov. 25.76p2)
K09WA4H 2009 WH104 (arc=1 day, H=21.1 ~204m) from Kanab Obs. (Nov. 25.25-28p2)
K09W25R 2009 WR25 (arc=3 days, H=21.6 ~162m) from DGRO (Nov. 23.05-06p4)
K09V00Z 2009 VZ (arc=17 days, H=21.3 ~186m) from the Siding Spring Survey (SSS) (Nov. 25.67-69p4)
K09V00W 2009 VW (arc=14 days, H=21.7 ~155m) from Spacewatch 0.9m (Nov. 23.12-17p3)
K09T10E 2009 TE10 (i=44.7°, arc=42 days, H=18.7 ~616m) from Spacewatch 1.8m (Nov. 26.07p1)
K09S02G 2009 SG2 (arc=68 days, H=20.1 ~323m) from Spacewatch 1.8m (Nov. 26.16-17p3)
K09S00M 2009 SM (arc=71 days, H=19.4 ~446m) from Spacewatch 1.8m (Nov. 26.19-21p3)
K09R01D 2009 RD1 (arc=76 days, H=20.5 ~269m) from Spacewatch 1.8m (Nov. 26.22-23p3)
K09R00N 2009 RN (Q=4.583 AU, arc=76 days, H=19.9 ~355m) from Hamamatsu-Yuto Obs. (Nov. 25.69-71p7)
K09Q02H 2009 QH2 (arc=95 days, H=21.2 ~195m) from Spacewatch 0.9m (Nov. 21.07-09p3)
K09N00A 2009 NA (Q=4.129 AU, arc=148 days, H=17.6 ~1.02 km) from Hamamatsu-Yuto Obs. (Nov. 25.61-65p11)
K09K00K 2009 KK (arc=2 opp, H=20.4 ~282m) from Spacewatch 0.9m (Nov. 20.43-47p3)
K09B58P 2009 BP58 (arc=3 opp, H=18.6 ~645m) from MLS (Nov. 25.39-41p4)
K07U03R 2007 UR3 (arc=3 opp, H=21.2 ~195m) from Spacewatch 0.9m (Nov. 22.36-39p3)
K06X00A 2006 XA (arc=3 opp, H=17.3 ~1.17 km) from Spacewatch 0.9m (Nov. 21.34-38p3 & 25.34-35p2)
K06W01N 2006 WN1 (arc=2 opp, H=18.8 ~589m) from Spacewatch 0.9m (Nov. 24.29-31p2)
K06V13G 2006 VG13 (arc=2 opp, H=21.5 ~170m) from Spacewatch 1.8m (Nov. 25.51-52p3)
K06U00R 2006 UR (arc=2 opp, H=19.2 ~490m) from Hamamatsu-Yuto Obs. (Nov. 25.65-69p6)
K05R06Q 2005 RQ6 (arc=2 opp, H=18.8 ~589m) from PJMSO (Nov. 25.26p5) and Hamamatsu-Yuto Obs. (Nov. 25.53-60p10)
K05M00C 2005 MC (Q=4.167 AU, arc=3 opp, H=16.4 ~1.78 km) from LINEAR (Nov. 25.45-50p5)
K04X03J 2004 XJ3 (Q=4.472 AU, arc=2 opp, H=17.5 ~1.07 km) from PJMSO (Nov. 25.37-38p5)
K04V15A 2004 VA15 (Q=4.604 AU, arc=2 opp, H=18.4 ~708m) from LINEAR (Nov. 25.32-37p5)
K03U34X 2003 UX34 (arc=5 opp, H=20.2 ~309m) from Spacewatch 0.9m (Nov. 23.20-24p3)
K02V85T 2002 VT85 (arc=5 opp, H=18.0 ~851m) from Spacewatch 0.9m (Nov. 21.34-36p2 & 25.34-38p3)
K01W01T 2001 WT1 (arc=4 opp, H=20.1 ~323m) from Spacewatch 0.9m (Nov. 24.35-38p3)
K01SS6G 2001 SG286 (arc=3 opp, H=20.9 ~224m) from Spacewatch 0.9m (Nov. 24.28p1)
K01R08E 2001 RE8 (arc=3 opp, H=18.8 ~589m) from Spacewatch 0.9m (Nov. 24.45-49p3)
K01H08A 2001 HA8 (arc=3 opp, H=16.9 ~1.41 km) from Spacewatch 0.9m (Nov. 23.41-45p3)
J98V32F 1998 VF32 (arc=4 opp, H=21.1 ~204m) from SSS (Nov. 25.64-66p3)
J95S00A 1995 SA (Q=4.027 AU, arc=6 opp, H=17.4 ~1.12 km) from Spacewatch 1.8m (Nov. 25.34-35p3)
J90U00A 1990 UA (arc=4 opp, H=19.7 ~389m) from Spacewatch 0.9m (Nov. 24.30-33p3)
M2073 222073 1999 HY1 from CSS (Nov. 25.23-25p3)
L8863 218863 2006 WO127 from CSS (Nov. 25.19-22p4)
L7807 217807 2000 XK44 from Urseanu Obs. (Nov. 20.84-85p5) and LINEAR (Nov. 25.26-31p5)
L7683 217683 1999 RP36 from MLS (Nov. 25.20-21p4)
K2683 202683 2006 US216 from SSS (Nov. 25.45-46p2)
I5716 185716 1998 SF35 from CSS (Nov. 25.23-25p4)
G3899 163899 2003 SD220 from CSS (Nov. 25.49-52p4)
G2273 162273 1999 VL12 from Wishing Star Obs. (Nov. 17.05-06p4) and MLS (Nov. 25.20-21p4)
F4631 154631 2003 WO25 from LINEAR (Nov. 25.45-50p5)
F2895 152895 2000 CQ101 from Spacewatch 0.9m (Nov. 25.22-26p3)
E3404 143404 2003 BD44 from Spacewatch 0.9m (Nov. 22.20-22p2)
D8883 138883 2000 YL29 from CSS (Nov. 25.19-21p4)
D8852 138852 2000 WN10 from Spacewatch 0.9m (Nov. 25.11-14p3)
D7062 137062 1998 WM from CSS (Nov. 25.45-47p3)
96590 96590 1998 XB from SSS (Nov. 25.45p2)
89136 89136 2001 US16 from Spacewatch 0.9m (Nov. 22.18-22p3)
22771 22771 1999 CU3 from MLS (Nov. 25.23-24p4)
05751 5751 Zao (1992 AC) from CSS (Nov. 25.19-22p4)
05653 5653 Camarillo (1992 WD5) from Spacewatch 0.9m (Nov. 24.52-54p3)
05646 5646 1990 TR from CSS (Nov. 25.40-43p4)
05131 5131 1990 BG from La Sagra Obs. (Nov. 25.16-19p3)
04015 4015 Wilson-Harrington (1979 VA) from Gualba Obs. (Nov. 24.74p3)
03288 3288 Seleucus (1982 DV) from MLS (Nov. 25.12-15p4)
01627 1627 Ivar (1929 SH) from Smolyan Obs. (Nov. 13.12-14p7)

MPEC 2009-W117 - "00:21 UT" - 2009 WN105

K09WA5N 2009 WN105 (small asteroid, Q=4.478 AU, H=22.3 ~117m) was discovered at 1012 UT on 25 Nov. by Spacewatch 1.8m, which observed it at Nov. 24.27-28p3 and 25.43p3. The discovery was confirmed by Great Shefford Obs. (Nov. 25.95-96p2).

Observers on 26 November '09

A total of 22 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2009-W118 -- 2009 WN25
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2009-W118 -- 2009 WN25
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2009-W118 -- 2009 WZ104
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPEC 2009-W118 -- 2009 WY51, 222073, 218863, 185716, 163899, 138883, 137062, 5751, 5646
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2009-W118 -- 2009 WY51, 2009 WV25, 2009 WF, 2009 US87
`H26`	Doc Greiner Research Obs. (DGRO) in Wisconsin, 2 in MPEC 2009-W118 -- 2009 WV25, 2009 WR25
`J95`	Great Shefford Obs. in England, 2 in MPECs 2009-W117 & 2009-W118 -- 2009 WQ52, 2009 WN105
`442`	Gualba Obs. in Spain, 1 in MPEC 2009-W118 -- 4015
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2009-W118 -- 2009 UV18, 2009 RN, 2009 NA, 2006 UR, 2005 RQ6
`682`	Kanab Obs. in Utah, 1 in MPEC 2009-W118 -- 2009 WH104
`704`	LINEAR in New Mexico, 7 in MPEC 2009-W118 -- 2009 WF, 2009 WB105, 2009 WA105, 2005 MC, 2004 VA15, 217807, 154631
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2009-W118 -- 5131
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 8 in MPEC 2009-W118 -- 2009 WV25, 2009 WD52, 2009 VR44, 2009 BP58, 22771, 217683, 162273, 3288
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 5 in MPEC 2009-W118 -- 2009 WV25, 2009 WF, 2009 UV18, 2005 RQ6, 2004 XJ3
`H36`	Sandlot Obs. in Kansas, 1 in MPEC 2009-W118 -- 2009 WV25
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPEC 2009-W118 -- 2009 VZ, 1998 VF32, 96590, 202683
`071`	Smolyan Obs. in Bulgaria, 1 in MPEC 2009-W118 -- 1627
`691`	Spacewatch 0.9m telescope in Arizona, 24 in MPEC 2009-W118 -- 2009 WT25, 2009 WD7, 2009 WD11, 2009 WB, 2009 VW, 2009 VR44, 2009 US87, 2009 QH2, 2009 KK, 2007 UR3, 2006 XA, 2006 WN1, 2003 UX34, 2002 VT85, 2001 WT1, 2001 SG286, 2001 RE8, 2001 HA8, 1990 UA, 89136, 152895, 143404, 138852, 5653
`291`	Spacewatch 1.8m telescope in Arizona, 12 in MPECs 2009-W117 & 2009-W118 -- 2009 WR52, 2009 WN105, 2009 WM1, 2009 WC11, 2009 VQ44, 2009 TE10, 2009 SM, 2009 SG2, 2009 RD1, 2006 VG13, 1996 XB27, 1995 SA
`926`	Tenagra II Obs. in Arizona, 1 in MPEC 2009-W118 -- 2009 WA54
`A92`	Urseanu Obs. in Romania, 1 in MPEC 2009-W118 -- 217807
`I15`	Wishing Star Obs. in Rhode Island, 1 in MPEC 2009-W118 -- 162273

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

Impact Risk Monitoring on 26 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 WA105	JPL Sentry	1606	2096-2103	2	1.7e-09	-8.56	-8.63	0	JPL: "Analysis based on 20 observations spanning .23898 days (2009-Nov-25.15421 to 2009-Nov-25.39319)." Diameter approximately 0.057 km. from mean, weighted H=23.9.

2009 WR52	JPL Sentry	1606	2031-2109	83	1.0e-04	-5.80	-5.98	0	JPL: "Analysis based on 20 observations spanning 2.9127 days (2009-Nov-23.21917 to 2009-Nov-26.13188)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
2009 WR52	NEODyS	1606	2031-2090	46	7.8e-05	-5.88	-6.02	0	NEODyS: "Based on 21 optical observations (of which 1 are rejected as outliers) from 2009/11/23.220 to 2009/11/26.137."

2009 WQ52	JPL Sentry	1606	2037	1	3.7e-07	-7.61	-7.61	0	JPL: "Analysis based on 21 observations spanning 2.6368 days (2009-Nov-23.19879 to 2009-Nov-25.835553)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
2009 WQ52	NEODyS	1606	R E M O V E D						-

2009 WN25	JPL Sentry	1606	R E M O V E D						JPL: Risk listing removed at 0951 UTC.

2009 WM1	NEODyS	1606	2018-2090	157	3.15e-04	-0.70	-0.96	1	NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2009/11/17.465 to 2009/11/25.488. NOTE: The Virtual Impactors in 2018/11/22.956 and 2027/11/23.216 ... are rated as Torino Scale 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 26 November '09

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

1606

Noted that JPL Sentry has posted 2009 WA105 as an impact risk - see above
Noted that NEODyS has updated its 2009 WM1 risk assessment - see above
Noted that JPL Sentry has removed 2009 WN25 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WQ52 risk assessment - see above
Noted that NEODyS has removed 2009 WQ52 as an impact risk - see above
Noted that JPL Sentry has updated its 2009 WR52 risk assessment - see above
Noted that NEODyS has updated its 2009 WR52 risk assessment - see above
Grabbed MPEC 2009-W118 - Daily Orbit Update - see above

0027

Grabbed MPEC 2009-W117 - 2009 WN105 - see above

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