2009-01-17 Tracking News

Contents on 17 January '09

IAU Minor Planet Center
- NEOCP Activity -- 13 listings: 1 new, 12 updated
- New MPECs -- nine MPECs
Observers -- 32 observing facilities
Impact Risk Monitoring -- one object
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 17 January '09

The MPC's NEO Confirmation Page has 13 listings: 1 new, 12 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had one new and twelve updated listings. Of these, one was a "one nighter." So far The Tracking News has counted a total of 21 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 17 January '09

Minor Planet Electronic Circulars

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

MPEC 2009-B03 time-stamped "02:29 UT" - 2009 AC16 - see below
MPEC 2009-B04 time-stamped "02:33 UT" - 2009 AD16 - see below
MPEC 2009-B05 time-stamped "02:37 UT" - 2009 AE16 - see below
MPEC 2009-B06 time-stamped "07:05 UT" - Daily Orbit Update - see below
MPEC 2009-B07 time-stamped "16:11 UT" - 2009 AF16 - see below
MPEC 2009-B08 time-stamped "16:15 UT" - 2009 AG16 - see below
MPEC 2009-B09 time-stamped "16:18 UT" - 2009 AH16 - see below
MPEC 2009-B10 time-stamped "16:53 UT" - Comets C/2008 W1, 2009 A1 (STEREO) - see below
MPEC 2009-B11 time-stamped "19:19 UT" - 2007 EJ26

MPEC 2009-B11 - "19:19 UT" - 2007 EJ26

K07E26J 2007 EJ26 (H=18.4 ~708m) from the Siding Spring Survey (SSS) (Jan. 4.59p1, 16.72p1 & 17.70-74p3)

MPEC 2009-B10 - "16:53 UT" - Comets C/2008 W1, 2009 A1 (STEREO)

CK09A010 C/2009 A1 from the HI1-A instrument (4) aboard STEREO-A (Jan. 10.02-07p6, 10.27-43p14, 10.49-60p10, 10.82-27p34, 11.74-77p4, 11.88-96p8, 12.24-29p6, 12.38-54p14 & 12.63p2) and the HI1-B instrument (4) aboard STEREO-B (Jan. 12.32p2, 12.43p2, 12.49p2 & 12.54-63p8)
CK08W010 C/2008 W1 from STEREO-B/HI1-B (4) (Nov. 18.74-79p6 & 18.88-99p10)

MPEC 2009-B09 - "16:18 UT" - 2009 AH16

K09A16H 2009 AH16 (H=17.7 ~977m) was discovered at 1053 UT on 15 Jan. by LINEAR, which observed it at Jan. 15.45-50p5 and 16.46-51p5. The discovery was confirmed by Sabino Canyon Obs. (Jan. 16.38p3), Astronomical Research Obs. (ARO) (Jan. 16.43-44p3), Calar Alto Obs. (Jan. 17.20p3), and Magdalena Ridge Obs. (MRO) (Jan. 17.54-55p4).

MPEC 2009-B08 - "16:15 UT" - 2009 AG16

K09A16G 2009 AG16 (H=21.1 ~204m) was discovered at 0750 UT on 15 Jan. by LINEAR, which observed it at Jan. 15.33-38p4. The discovery was confirmed by Sabino Canyon Obs. (Jan. 16.27-28p3), ARO (Jan. 16.33p3), Calar Alto Obs. (Jan. 17.21p3), and the Spacewatch 1.8m telescope (Jan. 17.52-53p3).

MPEC 2009-B07 - "16:11 UT" - 2009 AF16

K09A16F 2009 AF16 (H=21.0 ~214m) was discovered at 0607 UT on 15 Jan. by LINEAR, which observed it at Jan. 15.26-30p5 and 16.27-32p10. The discovery was confirmed by Sabino Canyon Obs. (Jan. 16.21-22p3), ARO (Jan. 16.24-25p4), San Marcello Pistoiese Obs. (Jan. 16.74p3), Alter Satzberg Obs. (Jan. 16.93-95p3), Calar Alto Obs. (Jan. 16.93-94p3), and Rodeo Obs. (Jan. 17.18p3).

<< DOU on 17 Jan. '09 >> MPEC 2009-B06 - "07:05 UT" - Daily Orbit Update

Observations of risk-listed objects
K09A00L 2009 AL (almost small, Q=4.089 AU, arc=16 days, H=21.8 ~148m) from Spacewatch 1.8m (Jan. 17.13-15p3)
Observations of recently (no longer) risk-listed objects
K09A15M 2009 AM15 (arc=10 days, H=18.6 ~645m) from SSS (Jan. 16.59p2)
K08Y32Y 2008 YY32 (small asteroid, arc=4 days, H=25.2 ~31m) from Schiaparelli Obs. (Jan. 4.17p5)
K08Y30U 2008 YU30 (small asteroid, arc=16 days, H=23.2 ~78m) from ARO (Jan. 16.27-28p3) and Desert Moon Obs. (Jan. 16.45-50p3)
K08Y30T 2008 YT30 (arc=16 days, H=19.3 ~467m) from Spacewatch 1.8m (Jan. 16.26-27p3)
K08Y29E 2008 YE29 (Q=4.540 AU, arc=17 days, H=20.3 ~295m) from ARO (Jan. 16.14-15p3) and Desert Moon Obs. (Jan. 16.20-22p3)
K08Y03J 2008 YJ3 (arc=25 days, H=20.2 ~309m) from Spacewatch 1.8m (Jan. 16.28p2)
Observations of small asteroids (H>22.0)
K08Y30G 2008 YG30 (arc=4 days, H=24.6 ~41m) from Schiaparelli Obs. (Jan. 4.15-16p5)
K08Y29G 2008 YG29 (arc=17 days, H=24.1 ~51m) from ARO (Jan. 16.20-22p3) and Spacewatch 1.8m (Jan. 16.34p3)
K08Y27M 2008 YM27 (arc=18 days, H=23.4 ~71m) from Spacewatch 1.8m (Jan. 16.29-30p3)
K08Y02M 2008 YM2 (arc=26 days, H=24.0 ~54m) from Spacewatch 1.8m (Jan. 16.32-33p3 at V=22.1)
K08T00D 2008 TD (arc=8 days, H=25.4 ~28m) from David Tholen's team on Mauna Kea (2008 Oct. 9.33p2)
K07U01Y 2007 UY1 (arc=2 opp, H=22.9 ~89m) from LINEAR (Jan. 16.20-26p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K08Y03G 2008 YG3 (Q=4.065 AU, arc=25 days, H=22.0 ~135m) from LINEAR (Jan. 16.20-26p5) and ARO (Jan. 16.21p3)
Observations of other objects
K09A16D 2009 AD16 (Q=4.216 AU, arc=2 days, H=20.5 ~269m) from ARO (Jan. 17.12-13p4)
K09A16C 2009 AC16 (arc=2 days, H=21.3 ~186m) from ARO (Jan. 17.08-09p3)
K09A15L 2009 AL15 (arc=9 days, H=21.3 ~186m) from Spacewatch 1.8m (Jan. 16.43-45p3)
K09A15K 2009 AK15 (arc=10 days, H=19.4 ~446m) from SSS (Jan. 16.57p1)
K09A00T 2009 AT (Q=7.351 AU, arc=14 days, H=21.0 ~214m) from ARO (Jan. 16.22-23p3) and Desert Moon Obs. (Jan. 16.25-30p3)
K09A00N 2009 AN (arc=15 days, H=20.6 ~257m) from ARO (Jan. 16.16-17p3)
K09A00M 2009 AM (Q=4.756 AU, arc=15 days, H=21.4 ~178m) from ARO (Jan. 16.17-18p3), Desert Moon Obs. (Jan. 16.33-35p3), the Mt. Lemmon Survey (MLS) (Jan. 16.35-36p3), and Stia Obs. (Jan. 16.85p3)
K09A00K 2009 AK (Q=4.212 AU, arc=15 days, H=19.7 ~389m) from ARO (Jan. 16.02-03p3)
K08Y32Z 2008 YZ32 (arc=16 days, H=20.2 ~309m) from ARO (Jan. 16.24p3) and Stia Obs. (Jan. 16.90-91p3)
K08Y32X 2008 YX32 (arc=16 days, H=20.8 ~234m) from ARO (Jan. 16.15-16p3)
K08Y30E 2008 YE30 (Q=4.098 AU, arc=25 days, H=21.2 ~195m) from ARO (Jan. 16.25-26p6) and Spacewatch 1.8m (Jan. 16.35-36p3)
K08Y28Z 2008 YZ28 (Q=4.050 AU, arc=17 days, H=20.0 ~339m) from ARO (Jan. 16.11-12p3)
K08Y27S 2008 YS27 (arc=18 days, H=21.2 ~195m) from ARO (Jan. 16.40-42p3)
K08Y27R 2008 YR27 (arc=41 days, H=18.1 ~812m) from LINEAR (Jan. 16.26-31p5) and Stia Obs. (Jan. 16.87-88p4)
K08Y26G 2008 YG26 (arc=18 days, H=21.7 ~155m) from ARO (Jan. 16.19-20p4)
K08X03E 2008 XE3 (Q=4.045 AU, arc=2 opp, H=16.3 ~1.86 km) from LINEAR (Jan. 16.27-33p5)
K08X02E 2008 XE2 (arc=43 days, H=19.3 ~467m) from ARO (Jan. 16.35-36p3)
K08W60H 2008 WH60 (arc=54 days, H=20.9 ~224m) from ARO (Jan. 16.06-08p3)
K08W01P 2008 WP1 (arc=58 days, H=20.4 ~282m) from ARO (Jan. 16.02-04p3 at V=21.9-22.1)
K08U00C 2008 UC (arc=85 days, H=19.0 ~537m) from Schiaparelli Obs. (Jan. 12.87-88p2)
K08T02Q 2008 TQ2 (arc=105 days, H=20.9 ~224m) from ARO (Jan. 16.34-36p3)
K08S01Q 2008 SQ1 (Q=4.682 AU, arc=2 opp, H=18.5 ~676m) from ARO (Jan. 16.15-16p3)
K08S01O 2008 SO1 (Q=4.610 AU, arc=2 opp, H=19.8 ~371m) from ARO (Jan. 16.31-33p3)
K08R26S 2008 RS26 (Q=4.801 AU, arc=136 days, H=18.1 ~812m) from ARO (Jan. 16.05-06p4)
K08Q03T 2008 QT3 (arc=144 days, H=18.8 ~589m) from ARO (Jan. 16.06-07p5)
K08O09B 2008 OB9 (Q=5.652 AU, arc=171 days, H=17.5 ~1.07 km) from ARO (Jan. 16.04p2)
K08CB6H 2008 CH116 (q=0.273 AU, arc=2 opp, H=19.0 ~537m) from Desert Moon Obs. (Jan. 16.54-55p3)
K07M13K 2007 MK13 (arc=3 opp, H=19.9 ~355m) from LINEAR (Jan. 16.47-51p4)
K06S19O 2006 SO19 (arc=3 opp, H=19.4 ~446m) from Spacewatch 1.8m (Jan. 16.54-55p3)
K06F51D 2006 FD51 (arc=2 opp, H=18.5 ~676m) from Spacewatch 1.8m (Jan. 16.51-52p2)
K06A02S 2006 AS2 (arc=4 opp, H=20.3 ~295m) from Walnut Creek Obs. (Jan. 16.24-26p3)
K05T51Z 2005 TZ51 (arc=3 opp, H=17.9 ~891m) from ARO (Jan. 16.10-11p4)
K05A28Y 2005 AY28 (q=0.375 AU, arc=2 opp, H=21.6 ~162m) from Spacewatch 1.8m (Jan. 16.31-32p3)
K04B41H 2004 BH41 (arc=4 opp, H=19.3 ~467m) from Spacewatch 1.8m (Jan. 17.12-13p3)
K03W25X 2003 WX25 (Q=4.606 AU, arc=2 opp, H=18.6 ~645m) from Cormons Obs. (Jan. 16.74-75p3)
K03R00B 2003 RB (arc=4 opp, H=18.7 ~616m) from MLS (Jan. 16.50-51p4)
K03B84H 2003 BH84 (arc=3 opp, H=16.9 ~1.41 km) from Spacewatch 1.8m (Jan. 16.37-38p3)
K02V94Y 2002 VY94 (Q=5.375 AU, arc=2 opp, H=16.8 ~1.48 km) from ARO (Jan. 16.08-09p4)
K01N01Z 2001 NZ1 (arc=5 opp, H=17.9 ~891m) from ARO (Jan. 16.10-13p3 at V=21.9-22.2)
K01B16J 2001 BJ16 (arc=4 opp, H=18.4 ~708m) from the Spacewatch 0.9m telescope (Jan. 16.43-47p3)
K00Y29J 2000 YJ29 (i=43.6°, q=0.327 AU, arc=2 opp, H=17.9 ~891m) from Spacewatch 1.8m (Jan. 16.25-26p3)
K00O00M 2000 OM (arc=3 opp, H=18.7 ~616m) from ARO (Jan. 16.07-08p5)
K00E70W 2000 EW70 (arc=2 opp, H=21.2 ~195m) from ARO (Jan. 16.30p3) and Desert Moon Obs. (Jan. 16.39-41p3)
K00B19L 2000 BL19 (Q=4.472 AU, arc=2 opp, H=19.9 ~355m) from LINEAR (Jan. 16.34-39p5) and ARO (Jan. 16.37-38p4)
K00A06E 2000 AE6 (Q=4.220 AU, arc=3 opp, H=17.5 ~1.07 km) from ARO (Jan. 16.38-39p3)
J99C08W 1999 CW8 (arc=3 opp, H=18.5 ~676m) from ARO (Jan. 16.31-32p3)
J94A01W 1994 AW1 (arc=3 opp, H=17.6 ~1.02 km) from Schiaparelli Obs. (Jan. 12.82-83p3) and LINEAR (Jan. 16.08-13p5)
K3471 203471 2002 AU4 from MLS (Jan. 16.12-13p4)
G2900 162900 2001 HG31 from LINEAR (Jan. 16.08-13p5)
G2361 162361 2000 AF6 from MLS (Jan. 16.16-18p4)
G2004 162004 1991 VE from LINEAR (Jan. 16.14-18p3)
F9368 159368 1979 QB from Spacewatch 0.9m (Jan. 16.20-24p3)
F4988 154988 2004 XN35 from MLS (Jan. 16.43-44p4)
F4715 154715 2004 LB6 from Mirasteilas Obs. (Jan. 17.01p3)
F3953 153953 2002 AD9 from LINEAR (Jan. 16.44-49p5)
F2742 152742 1998 XE12 from MLS (Jan. 16.16-17p3)
E3651 143651 2003 QO104 from LINEAR (Jan. 16.40-44p4)
E2348 142348 2002 RX211 from LINEAR (Jan. 16.26-31p5)
E1765 141765 2002 MP3 from LINEAR (Jan. 16.27-32p5)
D7805 137805 1999 YK5 from Schiaparelli Obs. (Jan. 12.85-86p2)
D6849 136849 1998 CS1 from Lulin Minor Bodies Tracking (LIMIT) (Jan. 10.56-71p30) and LINEAR (Jan. 16.38-43p5)
B1253 111253 2001 XU10 from LINEAR (Jan. 16.27-32p5), Stia Obs. (Jan. 16.92-93p4), and Mirasteilas Obs. (Jan. 16.96-98p3)
89355 89355 2001 VS78 from LINEAR (Jan. 16.21-26p5) and Mirasteilas Obs. (Jan. 16.94-95p3)
87024 87024 2000 JS66 from SSS (Jan. 16.61-64p4)
54071 54071 2000 GQ146 from LINEAR (Jan. 16.08-11p3)
36284 36284 2000 DM8 from El Guijo Obs. (Jan. 16.95-97p3)
25916 25916 2001 CP44 from LINEAR (Jan. 16.34-39p5)
20460 20460 Robwhiteley (1999 LO28) from LINEAR (Jan. 16.20-25p5)
12711 12711 Tukmit (1991 BB) from Mirasteilas Obs. (Jan. 17.03-04p3)
07358 7358 Oze (1995 YA3) from Vicksburg Obs. (Jan. 16.20-21p3) and Mirasteilas Obs. (Jan. 16.99-00p3)
05189 5189 1990 UQ from MLS (Jan. 16.45-46p4)
03200 3200 Phaethon (1983 TB) from Cormons Obs. (Jan. 16.78-79p4)
01627 1627 Ivar (1929 SH) from Vicksburg Obs. (Jan. 16.08-10p3)
01620 1620 Geographos (1951 RA) from LINEAR (Jan. 16.09-12p4) and Cormons Obs. (Jan. 16.77-78p3)

MPEC 2009-B05 - "02:37 UT" - 2009 AE16

K09A16E 2009 AE16 (i=46.4°, H=18.5 ~676m) was discovered at 0926 UT on 15 Jan. by LINEAR, which observed it at Jan. 15.39-44p5 and 16.46-51p5. The discovery was confirmed by Sabino Canyon Obs. (Jan. 16.34p3), Cordell-Lorenz Obs. (Jan. 16.35-39p10), ARO (Jan. 16.37p3), Tzec Maun Obs. Mayhill (Jan. 16.43-44p5), Moriyama Obs. (Jan. 16.66-67p2), and Farra d'Isonzo Obs. (Jan. 16.00-01p3).

MPEC 2009-B04 - "02:33 UT" - 2009 AD16

K09A16D 2009 AD16 (Q=4.219 AU, H=20.5 ~269m) was discovered at 0607 UT on 15 Jan. by LINEAR, which observed it at Jan. 15.26-30p4 and 16.27-32p5. The discovery was confirmed by Sabino Canyon Obs. (Jan. 16.23p3), Walnut Creek Obs. (Jan. 16.27-28p3), Cordell-Lorenz Obs. (Jan. 16.31-32p4), Moriyama Obs. (Jan. 16.52p2 & 16.70-71p2), San Marcello Pistoiese Obs. (Jan. 16.75p3), CAST Obs. (Jan. 16.80-81p2), Capannoli Obs. (Jan. 16.87-90p3), Paus Obs. (Jan. 16.88-91p4), Farra d'Isonzo Obs. (Jan. 16.91p2), Montcabre Obs. (Jan. 16.92-94p5), Calar Alto Obs. (Jan. 16.92-93p3), Alter Satzberg Obs. (Jan. 16.97p4), and El Guijo Obs. (Jan. 16.98-99p4).

MPEC 2009-B03 - "02:29 UT" - 2009 AC16

K09A16C 2009 AC16 (Earth MOID=4.8 LD, H=21.2 ~195m) was discovered at 0458 UT on 15 Jan. by LINEAR, which observed it at Jan. 15.21-26p5 and 16.20-25p5. The discovery was confirmed by ARO (Jan. 16.18p2), Sabino Canyon Obs. (Jan. 16.19p2), San Marcello Pistoiese Obs. (Jan. 16.73-74p3), Alter Satzberg Obs. (Jan. 16.80-81p4), Calar Alto Obs. (Jan. 16.91p3), and Farra d'Isonzo Obs. (Jan. 16.97p2).

Observers on 17 January '09

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

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 3 in MPECs 2009-B03, 2009-B04 & 2009-B07 -- 2009 AF16, 2009 AD16, 2009 AC16
`H55`	Astronomical Research Obs. (ARO) in Illinois, 37 in MPECs 2009-B03, 2009-B05, 2009-B06, 2009-B07, 2009-B08 & 2009-B09 -- 2009 AT, 2009 AN, 2009 AM, 2009 AK, 2009 AH16, 2009 AG16, 2009 AF16, 2009 AE16, 2009 AD16, 2009 AC16, 2008 YZ32, 2008 YZ28, 2008 YX32, 2008 YU30, 2008 YS27, 2008 YG3, 2008 YG29, 2008 YG26, 2008 YE30, 2008 YE29, 2008 XE2, 2008 WP1, 2008 WH60, 2008 TQ2, 2008 SQ1, 2008 SO1, 2008 RS26, 2008 QT3, 2008 OB9, 2005 TZ51, 2002 VY94, 2001 NZ1, 2000 OM, 2000 EW70, 2000 BL19, 2000 AE6, 1999 CW8
`235`	CAST Obs. in Italy, 1 in MPEC 2009-B04 -- 2009 AD16
`493`	Calar Alto Obs. in Spain, 5 in MPECs 2009-B03, 2009-B04, 2009-B07, 2009-B08 & 2009-B09 -- 2009 AH16, 2009 AG16, 2009 AF16, 2009 AD16, 2009 AC16
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2009-B04 -- 2009 AD16
`850`	Cordell-Lorenz Obs. in Tennessee, 2 in MPECs 2009-B04 & 2009-B05 -- 2009 AE16, 2009 AD16
`A94`	Cormons Obs. in Italy, 3 in MPEC 2009-B06 -- 2003 WX25, 3200, 1620
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2009-B06 -- 2009 AT, 2009 AM, 2008 YU30, 2008 YE29, 2008 CH116, 2000 EW70
`J27`	El Guijo Obs. in Spain, 2 in MPECs 2009-B04 & 2009-B06 -- 2009 AD16, 36284
`595`	Farra d'Isonzo Obs. in Italy, 3 in MPECs 2009-B03, 2009-B04 & 2009-B05 -- 2009 AE16, 2009 AD16, 2009 AC16
`704`	LINEAR in New Mexico, 26 in MPECs 2009-B03, 2009-B04, 2009-B05, 2009-B06, 2009-B07, 2009-B08 & 2009-B09 -- 2009 AH16, 2009 AG16, 2009 AF16, 2009 AE16, 2009 AD16, 2009 AC16, 2008 YR27, 2008 YG3, 2008 XE3, 2007 UY1, 2007 MK13, 2000 BL19, 1994 AW1, 89355, 54071, 25916, 20460, 162900, 162004, 153953, 143651, 142348, 141765, 136849, 111253, 1620
`D35`	Lulin Minor Bodies Tracking in Taiwan, 1 in MPEC 2009-B06 -- 136849
`H01`	Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2009-B09 -- 2009 AH16
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2009-B06 -- 2008 TD
`B67`	Mirasteilas Obs. in Switzerland, 5 in MPEC 2009-B06 -- 89355, 154715, 12711, 111253, 7358
`213`	Montcabre Obs. in Spain, 1 in MPEC 2009-B04 -- 2009 AD16
`900`	Moriyama Obs. in Japan, 2 in MPECs 2009-B04 & 2009-B05 -- 2009 AE16, 2009 AD16
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 7 in MPEC 2009-B06 -- 2009 AM, 2003 RB, 203471, 162361, 154988, 152742, 5189
`B49`	Paus Obs. in Spain, 1 in MPEC 2009-B04 -- 2009 AD16
`H11`	Rodeo Obs. in New Mexico, 1 in MPEC 2009-B07 -- 2009 AF16
`C494`	HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 1 in MPEC 2009-B10 -- C/2009 A1
`C504`	HI1-B instrument (4) aboard STEREO-B in heliocentric orbit trailing Earth, 2 in MPEC 2009-B10 -- C/2009 A1, C/2008 W1
`854`	Sabino Canyon Obs. in Arizona, 6 in MPECs 2009-B03, 2009-B04, 2009-B05, 2009-B07, 2009-B08 & 2009-B09 -- 2009 AH16, 2009 AG16, 2009 AF16, 2009 AE16, 2009 AD16, 2009 AC16
`104`	San Marcello Pistoiese Obs. in Italy, 3 in MPECs 2009-B03, 2009-B04 & 2009-B07 -- 2009 AF16, 2009 AD16, 2009 AC16
`204`	Schiaparelli Obs. in Italy, 5 in MPEC 2009-B06 -- 2008 YY32, 2008 YG30, 2008 UC, 1994 AW1, 137805
`E12`	Siding Spring Survey (SSS) in New South Wales, 4 in MPECs 2009-B06 & 2009-B11 -- 2009 AM15, 2009 AK15, 2007 EJ26, 87024
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2009-B06 -- 2001 BJ16, 159368
`291`	Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2009-B06 & 2009-B08 -- 2009 AL15, 2009 AL, 2009 AG16, 2008 YT30, 2008 YM27, 2008 YM2, 2008 YJ3, 2008 YG29, 2008 YE30, 2006 SO19, 2006 FD51, 2005 AY28, 2004 BH41, 2003 BH84, 2000 YJ29
`A78`	Stia Obs. in Italy, 4 in MPEC 2009-B06 -- 2009 AM, 2008 YZ32, 2008 YR27, 111253
`H10`	Tzec Maun Obs. Mayhill in New Mexico, 1 in MPEC 2009-B05 -- 2009 AE16
`H47`	Vicksburg Obs. in Mississippi, 2 in MPEC 2009-B06 -- 7358, 1627
`G56`	Walnut Creek Obs. in northern California, 2 in MPECs 2009-B04 & 2009-B06 -- 2009 AD16, 2006 AS2

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

Impact Risk Monitoring on 17 January '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.
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

2009 AL	NEODyS	1557	2057-2090	2	4.69e-08	-5.97	-5.99	0	NEODyS: "Based on 41 optical observations (of which 0 are rejected as outliers) from 2009/01/01.300 to 2009/01/17.147."
2009 AL	JPL Sentry	1556	2057-2106	3	1.7e-07	-5.48	-5.65	0	JPL: "Analysis based on 41 observations spanning 15.846 days (2009-Jan-01.29931 to 2009-Jan-17.14576)." Diameter approximately 0.150 km. from mean, weighted H=21.8.

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 17 January '09

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

1928	Grabbed MPEC 2009-B11 - 2007 EJ26 - see above
1714	Grabbed MPEC 2009-B10 - Comets C/2008 W1, 2009 A1 (STEREO) - see above
1626	Grabbed MPEC 2009-B07 - 2009 AF16 - see above Grabbed MPEC 2009-B08 - 2009 AG16 - see above Grabbed MPEC 2009-B09 - 2009 AH16 - see above
1557	Noted that NEODyS has updated its 2009 AL risk assessment - see above Grabbed MPEC 2009-B06 - Daily Orbit Update - see above
1556	Noted that JPL Sentry has updated its 2009 AL risk assessment - see above
0258	Grabbed MPEC 2009-B03 - 2009 AC16 - see above Grabbed MPEC 2009-B04 - 2009 AD16 - see above Grabbed MPEC 2009-B05 - 2009 AE16 - see above

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