2009-10-27 Tracking News

Contents on 27 October '09

IAU Minor Planet Center
- NEOCP Activity -- five listings: 2 new, 3 updated
- New MPECs -- eighteen MPECs
Observers -- 32 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
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 27 October '09

The MPC's NEO Confirmation Page has 5 listings: 2 new, 3 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had two new and three updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of eighteen 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 27 October '09

Minor Planet Electronic Circulars

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

MPEC 2009-U106 time-stamped "01:09 UT" - 2009 UL28 - see below
MPEC 2009-U107 time-stamped "01:12 UT" - 2009 UM28 - see below
MPEC 2009-U108 time-stamped "01:17 UT" - 2009 UK28 - see below
MPEC 2009-U109 time-stamped "03:40 UT" - 2008 NW4 - see below
MPEC 2009-U110 time-stamped "03:46 UT" - 2008 QY40 - see below
MPEC 2009-U111 time-stamped "03:52 UT" - 2008 SP266 - see below
MPEC 2009-U112 time-stamped "06:10 UT" - Daily Orbit Update - see below
MPEC 2009-U113 time-stamped "17:01 UT" - 2008 AP129 - see below
MPEC 2009-U114 time-stamped "17:09 UT" - 2008 QB43 - see below
MPEC 2009-U115 time-stamped "19:54 UT" - 2009 US87 - see below
MPEC 2009-U116 time-stamped "20:01 UT" - 2009 UT87 - see below
MPEC 2009-U117 time-stamped "20:06 UT" - 2009 UU87 - see below
MPEC 2009-U118 time-stamped "20:26 UT" - 2009 UV87 - see below
MPEC 2009-U119 time-stamped "20:33 UT" - 2009 UW87 - see below
MPEC 2009-U120 time-stamped "20:39 UT" - 2009 UX87 - see below
MPEC 2009-U121 time-stamped "20:43 UT" - 2009 UY87 - see below
MPEC 2009-U122 time-stamped "20:48 UT" - 2009 UZ87 - see below
MPEC 2009-U123 time-stamped "23:30 UT" - 2009 UG89

MPEC 2009-U123 - "23:30 UT" - 2009 UG89

K09U89G 2009 UG89 (i=131.2°, q=4.346 AU, Q=144.058 AU, H=12.6 ~10.2 km) was discovered at 0227 UT on 22 Oct. by the Mt. Lemmon Survey (MLS), which observed it at Oct. 22.10-12p4, 22.18p4, 24.08-14p8, and 25.10-11p4. The discovery was confirmed by Sandlot Obs. (Oct. 24.08-10p3), the Spacewatch 1.8m telescope (Oct. 24.13-14p3 & 25.12-13p3), and Magdalena Ridge Obs. (MRO) (Oct. 24.14-16p4 & 25.08-11p4).

MPEC 2009-U122 - "20:48 UT" - 2009 UZ87

K09U87Z 2009 UZ87 (small asteroid, Earth MOID=5.0 LD, H=25.6 ~26m) was discovered at 1028 UT on 27 Oct. by MLS, which observed it at Oct. 27.44-52p11. The discovery was confirmed by MRO (Oct. 27.47-48p5) and the Catalina Sky Survey (CSS) (Oct. 27.48p2). This object was within ten lunar distances (LD) of Earth, reaching 9.0 LD on 26 Oct.

MPEC 2009-U121 - "20:43 UT" - 2009 UY87

K09U87Y 2009 UY87 (risk-listed, H=19.1 ~513m) was discovered at 0948 UT on 27 Oct. by CSS, which observed it at Oct. 27.41-42p3 and 27.49-52p8. The discovery was confirmed by MRO (Oct. 27.49-51p5) and Moriyama Obs. (Oct. 27.70p2).

MPEC 2009-U120 - "20:39 UT" - 2009 UX87

K09U87X 2009 UX87 (small asteroid, Earth MOID=9.6 LD, H=25.2 ~31m) was discovered at 0545 UT on 27 Oct. by CSS, which observed it at Oct. 27.24-31p7 and 27.39-44p7. The discovery was confirmed by Sabino Canyon Obs. (Oct. 27.39p3), MRO (Oct. 27.40-42p4), and Tenagra II Obs. (Oct. 27.44p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 9.8 LD on 30 Oct.

MPEC 2009-U119 - "20:33 UT" - 2009 UW87

K09U87W 2009 UW87 (small asteroid, Earth MOID=1.2 LD, H=27.9 ~9m) was discovered at 0429 UT on 27 Oct. by MLS, which observed it at Oct. 27.19-25p6 and 27.36p3. The discovery was confirmed by MRO (Oct. 27.25-28p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 1.8 LD on 31 Oct.

MPEC 2009-U118 - "20:26 UT" - 2009 UV87

K09U87V 2009 UV87 (risk-listed, Q=4.000 AU, H=24.9 ~35m) was discovered at 0426 UT on 27 Oct. by MLS, which observed it at Oct. 27.18-24p8 and 27.36p4. The discovery was confirmed by MRO (Oct. 27.24-25p4).

MPEC 2009-U117 - "20:06 UT" - 2009 UU87

K09U87U 2009 UU87 (small asteroid, H=25.5 ~27m) was discovered at 1004 UT on 26 Oct. by MLS, which observed it at Oct. 26.42-48p8 and 27.33p4. The discovery was confirmed by Sandlot Obs. (Oct. 27.37-39p4), MRO (Oct. 27.43-44p3), and Tenagra II Obs. (Oct. 27.50-51p3).

MPEC 2009-U116 - "20:01 UT" - 2009 UT87

K09U87T 2009 UT87 (small asteroid, H=22.9 ~89m) was discovered at 0412 UT on 26 Oct. by MLS, which observed it at Oct. 26.18-20p4, 26.25p4, 26.31p2, and 27.18p4. The discovery was confirmed by MRO (Oct. 26.26-27p4 & 27.19-21p4).

MPEC 2009-U115 - "19:54 UT" - 2009 US87

K09U87S 2009 US87 (H=21.6 ~162m) was discovered at 1007 UT on 23 Oct. by MLS, which observed it at Oct. 23.42-44p4. The discovery was confirmed by the Spacewatch 0.9m telescope (Oct. 25.42-46p3), Spacewatch 1.8m (Oct. 26.32-33p3), and MRO (Oct. 27.45-46p4).

MPEC 2009-U114 - "17:09 UT" - 2008 QB43

K08Q43B 2008 QB43 (KBO, q=33.863 AU, Q=52.871 AU, H=5.6 ~257 km) was discovered at 0620 UT on 25 Aug. 2008 from Mt. Palomar, where it was observed at 2008 Aug. 25.26p1, 2008 Aug. 25.31p1, 2008 Aug. 26.23p1, 2008 Aug. 26.28p1, 2008 Sept. 19.13p1, 2008 Sept. 19.24p1, 2008 Sept. 19.29p1, 2008 Oct. 17.14p1, 2008 Oct. 17.20p1, 2008 Oct. 17.25p1, July 3.44p1, and 4.44p1. The discovery was confirmed by the Sloan Digital Sky Survey (SDSS) (1999 Oct. 16.31p2 at V=21.54-22.83).

MPEC 2009-U113 - "17:01 UT" - 2008 AP129

K08AC9P 2008 AP129 (KBO, q=35.898 AU, Q=47.440 AU, H=5.3 ~295 km) was discovered at 1231 UT on 11 Jan. 2008 from Mt. Palomar, where it was observed at 2008 Jan. 11.52-55p2, 2008 Jan. 14.26p1, 2008 Jan. 14.30p1, 2008 Jan. 31.21p1, 2008 Jan. 31.27p1, 2008 Jan. 31.40p1, 2008 Feb. 13.10p1, 2008 Feb. 13.18p1, 2008 Feb. 13.24p1, 2008 April 29.20p1, 2008 April 29.30p1, 2008 May 20.24p1, 2008 Oct. 9.45p1, 2008 Oct. 9.50p1, 2008 Oct. 12.44p1, 2008 Oct. 12.49p1, Jan. 28.32p1, and 28.37p1.

<< DOU on 27 Oct. '09 >> MPEC 2009-U112 - "06:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K09U20L 2009 UL20 (small asteroid, arc=2 days, H=23.8 ~59m) from Spacewatch 1.8m (Oct. 27.21-22p3)
K09U18V 2009 UV18 (arc=5 days, H=15.6 ~2.57 km, q=1.094 AU) from Spacewatch 1.8m (Oct. 26.39-40p3), Cordell-Lorenz Obs. (Oct. 26.40-45p4), and La Sagra Obs. (Oct. 27.11-14p4)
Observations of recently (no longer) risk-listed objects
K09U18W 2009 UW18 (arc=3 days, H=19.6 ~407m) from Spacewatch 1.8m (Oct. 26.24p3) and CSS (Oct. 26.36-38p4)
K09U14K 2009 UK14 (small asteroid, arc=3 days, H=25.9 ~22m) from Astronomical Research Obs. (ARO) (Oct. 25.15p3)
K09U02F 2009 UF2 (small asteroid, Q=4.666 AU, arc=9 days, H=24.3 ~47m) from Spacewatch 1.8m (Oct. 26.22-23p3 & 27.17-18p3)
K09U02D 2009 UD2 (small asteroid, arc=9 days, H=22.2 ~123m) from Spacewatch 1.8m (Oct. 27.12-13p3)
K09U00K 2009 UK (arc=11 days, H=20.0 ~339m) from Spacewatch 1.8m (Oct. 27.15p3)
Observations of small asteroids (H>22.0)
K09U20K 2009 UK20 (arc=2 days, H=26.6 ~16m) from Spacewatch 1.8m (Oct. 27.19-20p3)
K09U19T 2009 UT19 (q=0.292 AU, arc=3 days, H=22.5 ~107m) from Spacewatch 1.8m (Oct. 27.16-17p3)
K09U19C 2009 UC19 (arc=2 days, H=25.0 ~34m) from LINEAR (Oct. 26.29-33p4)
K09U14H 2009 UH14 (arc=5 days, H=22.4 ~112m) from LINEAR (Oct. 26.27-33p5)
K09U05Q 2009 UQ5 (arc=5 days, H=24.6 ~41m) from Chabot Obs. (Oct. 26.20-21p3)
K09U03O 2009 UO3 (arc=7 days, H=23.0 ~85m) from Madonna di Dossobuono Obs. (Oct. 26.83p3)
K09U00G 2009 UG (arc=9 days, H=23.2 ~78m) from ARO (Oct. 25.08p3)
K09U00F 2009 UF (arc=10 days, H=22.6 ~102m) from ARO (Oct. 25.09-11p3)
K09U00A 2009 UA (arc=10 days, H=23.7 ~62m) from Chabot Obs. (Oct. 26.18-19p3)
K09T10F 2009 TF10 (arc=11 days, H=22.2 ~123m) from ARO (Oct. 25.11-12p4) and MLS (Oct. 26.15-17p4)
K09T08N 2009 TN8 (arc=10 days, H=24.2 ~49m) from the Siding Spring Survey (SSS) (Oct. 24.64p1 & 24.70-73p2) and ARO (Oct. 25.14p3)
K08U95B 2008 UB95 (arc=2 opp, H=24.7 ~39m) from Spacewatch 1.8m (Oct. 26.37-38p2)
Observations of other objects
K09U19A 2009 UA19 (i=47.8°, arc=1 day, H=18.2 ~776m) from ARO (Oct. 25.02-03p3)
K09U14J 2009 UJ14 (i=59.7°, Q=5.540 AU, arc=5 days, H=20.5 ~269m) from Chabot Obs. (Oct. 26.25-26p3)
K09T12K 2009 TK12 (arc=13 days, H=20.4 ~282m) from Castelmartini Obs. (Oct. 24.98p3) and Madonna di Dossobuono Obs. (Oct. 26.88-89p3)
K09T08K 2009 TK8 (arc=12 days, H=20.2 ~309m) from Santa Maria de Montmagastrell Obs. (Oct. 23.96-98p4), Castelmartini Obs. (Oct. 25.04p3), ARO (Oct. 25.19-20p6), La Sagra Obs. (Oct. 26.86-88p6), and Peschiera del Garda Obs. (Oct. 26.88-90p4)
K09T01A 2009 TA1 (arc=26 days, H=20.1 ~323m) from Castelmartini Obs. (Oct. 25.06-07p3)
K09SH1V 2009 SV171 (Q=4.185 AU, arc=28 days, H=19.6 ~407m) from Castelmartini Obs. (Oct. 25.09-10p3), ARO (Oct. 25.22-23p5), and Cordell-Lorenz Obs. (Oct. 26.35-37p2)
K09SA4S 2009 SS104 (arc=30 days, H=20.9 ~224m) from Spacewatch 1.8m (Oct. 26.27-28p3)
K09S02G 2009 SG2 (arc=31 days, H=20.1 ~323m) from Peschiera del Garda Obs. (Oct. 13.81-84p4)
K09R00N 2009 RN (Q=4.583 AU, arc=45 days, H=20.0 ~339m) from Castelmartini Obs. (Oct. 25.08-09p3) and ARO (Oct. 25.23-24p5)
K09N00H 2009 NH (arc=106 days, H=18.8 ~589m) from Hadano Obs. (July 15.69-70p4)
K09N00E 2009 NE (q=0.361 AU, Q=4.987 AU, arc=4 opp, H=16.0 ~2.14 km) from Hadano Obs. (July 15.56-58p4)
K09M09C 2009 MC9 (arc=111 days, H=18.1 ~812m) from Hadano Obs. (Sept. 7.53-54p4) and Peschiera del Garda Obs. (Oct. 13.89-91p3)
K09M01L 2009 ML1 (arc=125 days, H=19.5 ~426m) from Madonna di Dossobuono Obs. (Oct. 26.86p3)
K09K03C 2009 KC3 (Q=5.447 AU, arc=175 days, H=18.0 ~851m) from Madonna di Dossobuono Obs. (Oct. 26.87p3)
K08W59B 2008 WB59 (arc=2 opp, H=19.4 ~446m) from SSS (Oct. 23.65-67p2)
K07L00L 2007 LL (arc=3 opp, H=20.4 ~282m) from Hadano Obs. (July 15.65-66p4)
K06V13G 2006 VG13 (arc=2 opp, H=21.4 ~178m) from Spacewatch 1.8m (Oct. 26.41-42p3)
K05R06Q 2005 RQ6 (arc=2 opp, H=18.8 ~589m) from Castelmartini Obs. (Oct. 25.00-01p3), Atlante Obs. (Oct. 25.90-91p3), and Peschiera del Garda Obs. (Oct. 26.91-92p3)
K02U03N 2002 UN3 (arc=5 opp, H=18.7 ~616m) from Spacewatch 0.9m (Oct. 26.41-45p3)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from Hadano Obs. (July 15.62p4)
K00A93X 2000 AX93 (arc=5 opp, H=17.6 ~1.02 km) from Spacewatch 1.8m (Oct. 26.49p3)
J99H01Y 1999 HY1 (arc=4 opp, H=18.2 ~776m) from Castelmartini Obs. (Oct. 25.03p3) and Cordell-Lorenz Obs. (Oct. 26.25-29p4)
M0124 220124 2002 TE66 from SSS (Oct. 23.61-62p2)
L8017 218017 2001 XV266 from Castelmartini Obs. (Oct. 25.12p3) and CSS (Oct. 26.34-36p3)
L7683 217683 1999 RP36 from Castelmartini Obs. (Oct. 25.05-06p3), LINEAR (Oct. 26.28-33p5), Cordell-Lorenz Obs. (Oct. 26.36-38p2), and Purple Mtn. Obs. Xuyi Station (Xuyi Sta.) (Oct. 26.69-73p4)
L1871 211871 2004 HO from SSS (Oct. 23.60-63p3)
I5716 185716 1998 SF35 from Castelmartini Obs. (Oct. 25.02p3) and Cordell-Lorenz Obs. (Oct. 26.26-30p4)
I3548 183548 2003 HU42 from MLS (Oct. 26.51-52p4)
G3697 163697 2003 EF54 from Hadano Obs. (Sept. 7.59-60p3)
G2998 162998 2001 SK162 from Castelmartini Obs. (Oct. 24.92-93p3)
F5340 155340 2006 SK198 from MLS (Oct. 26.36-38p4)
F4244 154244 2002 KL6 from Castelmartini Obs. (Oct. 25.01p3)
F2931 152931 2000 EA107 from CSS (Oct. 26.49-51p3)
F2575 152575 1994 GY from Nazaret Obs. (Oct. 26.09-10p3)
E0158 140158 2001 SX169 from MLS (Oct. 26.18-20p4)
D6617 136617 1994 CC from Castelmartini Obs. (Oct. 24.99-00p3) and Xuyi Sta. (Oct. 26.46-50p4)
99907 99907 1989 VA from LINEAR (Oct. 26.42-46p4)
87684 87684 2000 SY2 from SSS (Oct. 23.71-73p2)
87311 87311 2000 QJ1 from LINEAR (Oct. 26.44-47p3)
85818 85818 1998 XM4 from Castelmartini Obs. (Oct. 25.17p2) and LINEAR (Oct. 26.35-40p5)
42286 42286 2001 TN41 from SSS (Oct. 24.64p1)
38091 38091 1999 JT3 from Castelmartini Obs. (Oct. 25.04-05p3), Xuyi Sta. (Oct. 25.63-66p4), LINEAR (Oct. 26.27-33p5), and MLS (Oct. 26.30p4)
20790 20790 2000 SE45 from Castelmartini Obs. (Oct. 24.96p3) and CSS (Oct. 26.23-25p4)
17274 17274 2000 LC16 from Hadano Obs. (Sept. 7.58p5)
16816 16816 1997 UF9 from Xuyi Sta. (Oct. 26.63-67p4)
06239 6239 Minos (1989 QF) from CSS (Oct. 26.27-29p4)
05587 5587 1990 SB from Castelmartini Obs. (Oct. 25.10p1)
05131 5131 1990 BG from LINEAR (Oct. 26.43-47p4)
04486 4486 Mithra (1987 SB) from Spacewatch 0.9m (Oct. 26.47-50p3)
03361 3361 Orpheus (1982 HR) from MLS (Oct. 26.18-20p4)
03288 3288 Seleucus (1982 DV) from Xuyi Sta. (Oct. 25.52-56p4)
00433 433 Eros (1898 DQ) from Hadano Obs. (Sept. 7.61p3)

MPEC 2009-U111 - "03:52 UT" - 2008 SP266

K08SQ6P 2008 SP266 (KBO, q=36.144 AU, Q=46.284 AU, H=5.7 ~245 km) from Mt. Palomar (Aug. 19.40p1, 19.49p1 & 20.30p1) and Lowell Obs. Anderson Mesa Station (Sept. 18.35p1 & 18.44p1)

MPEC 2009-U110 - "03:46 UT" - 2008 QY40

K08Q40Y 2008 QY40 (q=36.691 AU, Q=89.488 AU, H=5.3 ~295 km) from Mt. Palomar (July 26.39p1, 29.38p1, 29.47p1, 30.37p1 & 30.47p1) and Anderson Mesa Sta. (Oct. 12.25p1 & 12.31p1)

MPEC 2009-U109 - "03:40 UT" - 2008 NW4

K08N04W 2008 NW4 (KBO, q=36.353 AU, Q=54.820 AU, H=6.0 ~214 km) from Mt. Palomar (May 27.43p1 & 29.42p1) and Anderson Mesa Sta. (July 27.21p1 & 27.27p1)

MPEC 2009-U108 - "01:17 UT" - 2009 UK28

K09U28K 2009 UK28 (H=19.9 ~355m) was discovered at 0339 UT on 26 Oct. by La Sagra Obs., which observed it at Oct. 26.15-18p5 and 26.98-99p4. The discovery was confirmed by Engelhardt Obs. Zelenchukskaya Station (Oct. 26.88-91p7), Libbiano Obs. (Oct. 26.94-95p3), and Sormano Obs. (Oct. 26.96p3).

MPEC 2009-U107 - "01:12 UT" - 2009 UM28

K09U28M 2009 UM28 (small asteroid, H=23.6 ~65m) was discovered at 0508 UT on 26 Oct. by MLS, which observed it at Oct. 26.21-25p7 and 26.31p4. The discovery was confirmed by MRO (Oct. 26.28-30p5), Sabino Canyon Obs. (Oct. 26.30-33p3), Kevin Hills via RAS Obs. Moorook (Oct. 26.47-50p4), Remanzacco Obs. (Oct. 26.88-89p3), Libbiano Obs. (Oct. 26.88-89p3), Sormano Obs. (Oct. 26.90p1 & 26.94p1), and Schiaparelli Obs. (Oct. 26.00-01p2).

MPEC 2009-U106 - "01:09 UT" - 2009 UL28

K09U28L 2009 UL28 (small asteroid, Earth MOID=8.6 LD, H=24.9 ~35m) was discovered at 0446 UT on 26 Oct. by Spacewatch 0.9m, which observed it at Oct. 26.20-23p3. The discovery was confirmed by Spacewatch 1.8m (Oct. 26.34-35p3), Sabino Canyon Obs. (Oct. 26.35-37p3), MRO (Oct. 26.39-40p5), and Libbiano Obs. (Oct. 26.97-98p3).

Observers on 27 October '09

A total of 32 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 9 in MPEC 2009-U112 -- 2009 UK14, 2009 UG, 2009 UF, 2009 UA19, 2009 TN8, 2009 TK8, 2009 TF10, 2009 SV171, 2009 RN
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2009-U112 -- 2005 RQ6
`160`	Castelmartini Obs. in Italy, 17 in MPEC 2009-U112 -- 2009 TK8, 2009 TK12, 2009 TA1, 2009 SV171, 2009 RN, 2005 RQ6, 1999 HY1, 85818, 38091, 218017, 217683, 20790, 185716, 162998, 154244, 136617, 5587
`703`	Catalina Sky Survey (CSS) in Arizona, 8 in MPECs 2009-U112, 2009-U120, 2009-U121 & 2009-U122 -- 2009 UZ87, 2009 UY87, 2009 UX87, 2009 UW18, 218017, 20790, 152931, 6239
`G58`	Chabot Obs. in northern California, 3 in MPEC 2009-U112 -- 2009 UQ5, 2009 UJ14, 2009 UA
`850`	Cordell-Lorenz Obs. in Tennessee, 5 in MPEC 2009-U112 -- 2009 UV18, 2009 SV171, 1999 HY1, 217683, 185716
`114`	Engelhardt Obs. Zelenchukskaya Station in Karachay-Cherkessia, 1 in MPEC 2009-U108 -- 2009 UK28
`355`	Hadano Obs. in Japan, 8 in MPEC 2009-U112 -- 2009 NH, 2009 NE, 2009 MC9, 2007 LL, 2002 LV, 17274, 163697, 433
`704`	LINEAR in New Mexico, 8 in MPEC 2009-U112 -- 2009 UH14, 2009 UC19, 99907, 87311, 85818, 38091, 217683, 5131
`J75`	La Sagra Obs. in Spain, 3 in MPECs 2009-U108 & 2009-U112 -- 2009 UV18, 2009 UK28, 2009 TK8
`B33`	Libbiano Obs. in Italy, 3 in MPECs 2009-U106, 2009-U107 & 2009-U108 -- 2009 UM28, 2009 UL28, 2009 UK28
`688`	Lowell Obs. Anderson Mesa Station in Arizona, 3 in MPECs 2009-U109, 2009-U110 & 2009-U111 -- 2008 SP266, 2008 QY40, 2008 NW4
`560`	Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2009-U112 -- 2009 UO3, 2009 TK12, 2009 ML1, 2009 KC3
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 11 in MPECs 2009-U106, 2009-U107, 2009-U115, 2009-U116, 2009-U117, 2009-U118, 2009-U119, 2009-U120, 2009-U121, 2009-U122 & 2009-U123 -- 2009 UZ87, 2009 UY87, 2009 UX87, 2009 UW87, 2009 UV87, 2009 UU87, 2009 UT87, 2009 US87, 2009 UM28, 2009 UL28, 2009 UG89
`900`	Moriyama Obs. in Japan, 1 in MPEC 2009-U121 -- 2009 UY87
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 14 in MPECs 2009-U107, 2009-U112, 2009-U115, 2009-U116, 2009-U117, 2009-U118, 2009-U119, 2009-U122 & 2009-U123 -- 2009 UZ87, 2009 UW87, 2009 UV87, 2009 UU87, 2009 UT87, 2009 US87, 2009 UM28, 2009 UG89, 2009 TF10, 38091, 183548, 155340, 140158, 3361
`675`	Mt. Palomar in southern California, 5 in MPECs 2009-U109, 2009-U110, 2009-U111, 2009-U113 & 2009-U114 -- 2008 SP266, 2008 QY40, 2008 QB43, 2008 NW4, 2008 AP129
`J47`	Nazaret Obs. in Spain, 1 in MPEC 2009-U112 -- 152575
`A53`	Peschiera del Garda Obs. in Italy, 4 in MPEC 2009-U112 -- 2009 TK8, 2009 SG2, 2009 MC9, 2005 RQ6
`D29`	Purple Mtn. Obs. Xuyi Station (Xuyi Sta.) in China, 5 in MPEC 2009-U112 -- 38091, 217683, 16816, 136617, 3288
D90`	Kevin Hills in England via RAS Obs. Moorook in South Australia, 1 in MPEC 2009-U107 -- 2009 UM28
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2009-U107 -- 2009 UM28
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-U106, 2009-U107 & 2009-U120 -- 2009 UX87, 2009 UM28, 2009 UL28
`H36`	Sandlot Obs. in Kansas, 2 in MPECs 2009-U117 & 2009-U123 -- 2009 UU87, 2009 UG89
`B74`	Santa Maria de Montmagastrell Obs. in Spain, 1 in MPEC 2009-U112 -- 2009 TK8
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2009-U107 -- 2009 UM28
`E12`	Siding Spring Survey (SSS) in New South Wales, 6 in MPEC 2009-U112 -- 2009 TN8, 2008 WB59, 87684, 42286, 220124, 211871
`645`	Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2009-U114 -- 2008 QB43
`587`	Sormano Obs. in Italy, 2 in MPECs 2009-U107 & 2009-U108 -- 2009 UM28, 2009 UK28
`691`	Spacewatch 0.9m telescope in Arizona, 4 in MPECs 2009-U106, 2009-U112 & 2009-U115 -- 2009 US87, 2009 UL28, 2002 UN3, 4486
`291`	Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-U106, 2009-U112, 2009-U115 & 2009-U123 -- 2009 UW18, 2009 UV18, 2009 UT19, 2009 US87, 2009 UL28, 2009 UL20, 2009 UK20, 2009 UK, 2009 UG89, 2009 UF2, 2009 UD2, 2009 SS104, 2008 UB95, 2006 VG13, 2000 AX93
`926`	Tenagra II Obs. in Arizona, 2 in MPECs 2009-U117 & 2009-U120 -- 2009 UX87, 2009 UU87

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

Impact Risk Monitoring on 27 October '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 UY87	JPL Sentry	2310	2020-2100	22	1.8e-08	-4.60	-5.01	0	JPL: "Analysis based on 18 observations spanning .29206 days (2009-Oct-27.40843 to 2009-Oct-27.70049)." Diameter approximately 0.488 km. from mean, weighted H=19.2.

2009 UV87	JPL Sentry	2310	2029-2100	20	2.3e-08	-7.36	-7.99	0	JPL: "Analysis based on 16 observations spanning .17970 days (2009-Oct-27.18486 to 2009-Oct-27.36456)." Diameter approximately 0.039 km. from mean, weighted H=24.7.

2009 UL20	JPL Sentry	1323	R E M O V E D						JPL: Risk listing removed at 0850 UTC.

2009 UV18	JPL Sentry	1323	R E M O V E D						JPL: Risk listing removed at 0847 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 27 October '09

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

2358	Grabbed MPEC 2009-U123 - 2009 UG89 - see above
2310	Noted that JPL Sentry has posted 2009 UV87 as an impact risk - see above Noted that JPL Sentry has posted 2009 UY87 as an impact risk - see above Grabbed MPEC 2009-U115 - 2009 US87 - see above Grabbed MPEC 2009-U116 - 2009 UT87 - see above Grabbed MPEC 2009-U117 - 2009 UU87 - see above Grabbed MPEC 2009-U118 - 2009 UV87 - see above Grabbed MPEC 2009-U119 - 2009 UW87 - see above Grabbed MPEC 2009-U120 - 2009 UX87 - see above Grabbed MPEC 2009-U121 - 2009 UY87 - see above Grabbed MPEC 2009-U122 - 2009 UZ87 - see above
1806	Grabbed MPEC 2009-U113 - 2008 AP129 - see above Grabbed MPEC 2009-U114 - 2008 QB43 - see above
1323	Noted that JPL Sentry has removed 2009 UL20 as an impact risk - see above Noted that JPL Sentry has removed 2009 UV18 as an impact risk - see above Grabbed MPEC 2009-U112 - Daily Orbit Update - see above
0405	Grabbed MPEC 2009-U106 - 2009 UL28 - see above Grabbed MPEC 2009-U107 - 2009 UM28 - see above Grabbed MPEC 2009-U108 - 2009 UK28 - see above Grabbed MPEC 2009-U109 - 2008 NW4 - see above Grabbed MPEC 2009-U110 - 2008 QY40 - see above Grabbed MPEC 2009-U111 - 2008 SP266 - see above

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