2009-02-04 Tracking News

Contents on 4 February '09

IAU Minor Planet Center
- NEOCP Activity -- six listings: 6 updated
- New MPECs -- nineteen MPECs
Observers -- 23 observing facilities
Impact Risk Monitoring -- seven 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 4 February '09

The MPC's NEO Confirmation Page has 6 listings: 6 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had six updated listings. Of these, four were "one nighters." So far The Tracking News has counted a total of 29 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 4 February '09

Minor Planet Electronic Circulars

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

MPEC 2009-C29 time-stamped "05:09 UT" - 2007 BG29 - see below
MPEC 2009-C30 time-stamped "07:06 UT" - Daily Orbit Update - see below
MPEC 2009-C31 time-stamped "16:35 UT" - 2009 CQ1 - see below
MPEC 2009-C32 time-stamped "16:38 UT" - 2009 CR1 - see below
MPEC 2009-C33 time-stamped "16:44 UT" - 2009 CS1 - see below
MPEC 2009-C34 time-stamped "16:48 UT" - 2009 CT1 - see below
MPEC 2009-C35 time-stamped "16:52 UT" - 2009 CU1 - see below
MPEC 2009-C36 time-stamped "16:54 UT" - 2009 CV1 - see below
MPEC 2009-C37 time-stamped "16:57 UT" - 2009 CW1 - see below
MPEC 2009-C38 time-stamped "17:01 UT" - 2009 CX1 - see below
MPEC 2009-C39 time-stamped "17:03 UT" - 2009 CY1 - see below
MPEC 2009-C40 time-stamped "17:07 UT" - 2009 CZ1 - see below
MPEC 2009-C41 time-stamped "17:09 UT" - 2009 CA2 - see below
MPEC 2009-C42 time-stamped "17:12 UT" - 2009 CB2 - see below
MPEC 2009-C43 time-stamped "17:17 UT" - 2009 CC2 - see below
MPEC 2009-C44 time-stamped "17:21 UT" - 2009 CD2 - see below
MPEC 2009-C45 time-stamped "22:25 UT" - 2009 CR2 - see below
MPEC 2009-C46 time-stamped "22:42 UT" - Comets C/2008 V1, 2008 V2, 2008 V3, 2008 V4 (SOHO) - see below
MPEC 2009-C47 time-stamped "22:50 UT" - Comets C/2008 V5, 2008 V6, 2008 W2, 2008 W3 (SOHO)

MPEC 2009-C47 - "22:50 UT" - Comets C/2008 V5, 2008 V6, 2008 W2, 2008 W3 (SOHO)

CK08W030 C/2008 W3 from the LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. (SOHO) (Nov. 23.39-53p16, 23.57-82p26 & 23.86p2) and the LASCO Coronagraph 2 aboard the Solar & Heliospheric Obs. (SOHO) (Nov. 23.91-05p20)
CK08W020 C/2008 W2 from SOHO C2 (Nov. 16.32-42p24)
CK08V060 C/2008 V6 from SOHO C2 (Nov. 11.87-93p10)
CK08V050 C/2008 V5 from SOHO C2 (Nov. 8.66-77p18)

MPEC 2009-C46 - "22:42 UT" - Comets C/2008 V1, 2008 V2, 2008 V3, 2008 V4 (SOHO)

CK08V040 C/2008 V4 from SOHO C2 (Nov. 7.06-15p14)
CK08V030 C/2008 V3 from SOHO C2 (Nov. 6.33-35p6 & 6.41-42p4)
CK08V020 C/2008 V2 from SOHO C2 (Nov. 4.25-62p52 & 4.69-83p20)
CK08V010 C/2008 V1 from SOHO C3 (Nov. 2.82-93p12 & 2.97-99p4) and SOHO C2 (Nov. 3.06-17p18)

MPEC 2009-C45 - "22:25 UT" - 2009 CR2

K09C02R 2009 CR2 (risk-listed, Q=4.833 AU, H=16.7 ~1.55 km) was discovered at 0716 UT on 3 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 3.30-32p4 and 3.48-50p4. The discovery was confirmed by Ernesto Guido via RAS Obs. Mayhill (Feb. 3.43-44p2), Jim Young via Table Mtn. Obs. (Feb. 3.44-45p4), Bergen-Enkheim Obs. (Feb. 3.89-93p3), and Naef Obs. (Feb. 4.87-89p2).

MPEC 2009-C44 - "17:21 UT" - 2009 CD2

K09C02D 2009 CD2 (risk-listed, Earth MOID=5.6 LD, H=26.0 ~21m) was discovered at 0739 UT on 4 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 4.32-35p8, 4.40p3, and 4.47p3.

MPEC 2009-C43 - "17:17 UT" - 2009 CC2

K09C02C 2009 CC2 (small asteroid, Earth MOID=0.5 LD, H=27.8 ~9m) was discovered at 0523 UT on 4 Feb. by CSS, which observed it at Feb. 4.22-25p4. The discovery was confirmed by MLS (Feb. 4.29p4), Sabino Canyon Obs. (Feb. 4.32-33p3), Young/Table Mtn. (Feb. 4.35-36p4), and Astronomical Research Obs. (ARO) (Feb. 4.36-37p3). This object is now within ten lunar distances (LD) of Earth, reaching 0.5 LD on 2 Feb. (INTRUDER).

MPEC 2009-C42 - "17:12 UT" - 2009 CB2

K09C02B 2009 CB2 (i=38.6°, H=19.3 ~467m) was discovered at 0338 UT on 4 Feb. by the Spacewatch 1.8m telescope, which observed it at Feb. 4.15-16p3, 4.21-22p3, and 4.46-47p3. The discovery was confirmed by MLS (Feb. 4.24p4 & 4.34p4) and Sandlot Obs. (Feb. 4.36-37p3).

MPEC 2009-C41 - "17:09 UT" - 2009 CA2

K09C02A 2009 CA2 (i=45.1°, H=18.2 ~776m) was discovered at 1249 UT on 3 Feb. by CSS, which observed it at Feb. 3.53-54p4. The discovery was confirmed by MLS (Feb. 4.45p4 & 4.55p3).

MPEC 2009-C40 - "17:07 UT" - 2009 CZ1

K09C01Z 2009 CZ1 (risk-listed, Earth MOID=0.5 LD, H=24.5 ~43m) was discovered at 0915 UT on 3 Feb. by MLS, which observed it at Feb. 3.39-44p8 at V=20.6-21.8 and 4.37-41p8 at V=21.5-22.4. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 3.47-48p3).

MPEC 2009-C39 - "17:03 UT" - 2009 CY1

K09C01Y 2009 CY1 (small asteroid, H=22.9 ~89m) was discovered at 0854 UT on 3 Feb. by MLS, which observed it at Feb. 3.37-42p8, 3.47p3, and 4.30-31p4. The discovery was confirmed by Spacewatch 1.8m (Feb. 4.25p2).

MPEC 2009-C38 - "17:01 UT" - 2009 CX1

K09C01X 2009 CX1 (small asteroid, Q=4.437 AU, H=23.4 ~71m) was discovered at 0854 UT on 3 Feb. by MLS, which observed it at Feb. 3.37-42p8 at V=20.4-21.7, 3.47p4 at V=20.6-21.9, 4.30-31p4 at V=21.6-22.6, and 4.40-41p4 at V=20.6-21.5.

MPEC 2009-C37 - "16:57 UT" - 2009 CW1

K09C01W 2009 CW1 (borderline-small, H=22.0 ~135m) was discovered at 0801 UT on 3 Feb. by LINEAR, which observed it at Feb. 3.33-38p4. The discovery was confirmed by MLS (Feb. 4.55-56p4).

MPEC 2009-C36 - "16:54 UT" - 2009 CV1

K09C01V 2009 CV1 (small asteroid, H=26.0 ~21m) was discovered at 0726 UT on 3 Feb. by MLS, which observed it at Feb. 3.31-32p3, 3.37-42p8, 4.24p4, and 4.34p4. The discovery was confirmed by MRO (Feb. 3.44-45p3).

MPEC 2009-C35 - "16:52 UT" - 2009 CU1

K09C01U 2009 CU1 (small asteroid, H=22.3 ~117m) was discovered at 0723 UT on 3 Feb. by MLS, which observed it at Feb. 3.31-32p4, 3.41-42p4, and 4.25-27p4. The discovery was confirmed by MRO (Feb. 3.41-42p3), Spacewatch 1.8m (Feb. 4.23p3), and Sandlot Obs. (Feb. 4.33-35p3).

MPEC 2009-C34 - "16:48 UT" - 2009 CT1

K09C01T 2009 CT1 (small asteroid, H=24.3 ~47m) was discovered at 0702 UT on 3 Feb. by the Spacewatch 0.9m telescope, which observed it at Feb. 3.29-33p3. The discovery was confirmed by Spacewatch 1.8m (Feb. 3.38-41p6, 4.17p3 & 4.48-49p3) and MLS (Feb. 4.34-35p3).

MPEC 2009-C33 - "16:44 UT" - 2009 CS1

K09C01S 2009 CS1 (H=20.9 ~224m) was discovered at 0645 UT on 3 Feb. by LINEAR, which observed it at Feb. 3.28-32p4. The discovery was confirmed by MLS (Feb. 4.18p4), Young/Table Mtn. (Feb. 4.18-20p4), Sandlot Obs. (Feb. 4.31-32p3), and Sabino Canyon Obs. (Feb. 4.39-40p3).

MPEC 2009-C32 - "16:38 UT" - 2009 CR1

K09C01R 2009 CR1 (small asteroid, H=24.6 ~41m) was discovered at 0604 UT on 3 Feb. by MLS, which observed it at Feb. 3.25-27p4, 3.33p4, 3.41-42p4, and 4.22-23p2. The discovery was confirmed by Spacewatch 1.8m (Feb. 3.34-35p3 & 4.14p3), MRO (Feb. 3.36-38p6), and Sandlot Obs. (Feb. 4.28-29p2).

MPEC 2009-C31 - "16:35 UT" - 2009 CQ1

K09C01Q 2009 CQ1 (H=20.5 ~269m) was discovered at 0504 UT on 3 Feb. by LINEAR, which observed it at Feb. 3.21-26p5. The discovery was confirmed by CSS (Jan. 20.24-26p3), Silver Spring Obs. (Feb. 4.08-10p2), Young/Table Mtn. (Feb. 4.15-17p4), MLS (Feb. 4.16-17p4), and Sabino Canyon Obs. (Feb. 4.26-27p3).

<< DOU on 4 Feb. '09 >> MPEC 2009-C30 - "07:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K09C00V 2009 CV (small asteroid, arc=1 day, H=24.2 ~49m) from Bergen-Enkheim Obs. (Feb. 3.81-87p6), Wildberg Obs. (Feb. 3.82-83p3), and Starkenburg Obs. (Feb. 3.88-89p3)
K09B81D 2009 BD81 (Q=4.253 AU, arc=3 days, H=20.3 ~295m) from ARO (Feb. 3.01-02p3)
Observations of recently (no longer) risk-listed objects
K09B58C 2009 BC58 (arc=9 days, H=18.8 ~589m) from Spacewatch 1.8m (Feb. 3.50-51p3)
Observations of small asteroids (H>22.0)
K09B58L 2009 BL58 (arc=5 days, H=24.5 ~43m) from ARO (Feb. 3.13p4)
K09B11H 2009 BH11 (arc=6 days, H=26.4 ~18m) from Spacewatch 0.9m (Feb. 1.26p1)
K09B11A 2009 BA11 (arc=9 days, H=23.9 ~56m) from ARO (Feb. 3.13-14p3)
K09B05Q 2009 BQ5 (arc=14 days, H=23.2 ~78m) from MLS (Feb. 3.19-21p4)
K09B02N 2009 BN2 (arc=16 days, H=24.9 ~35m) from MLS (Feb. 3.39-40p3 at V=22.1-2)
K09B02H 2009 BH2 (arc=17 days, H=22.4 ~112m) from ARO (Feb. 3.05-06p3)
K08V15A 2008 VA15 (arc=86 days, H=23.6 ~65m) from Spacewatch 0.9m (Feb. 2.34-36p2)
Observations of almost-small asteroids (21.7<H<=22.0)
J99A39J 1999 AJ39 (arc=3 opp, H=22.0 ~135m) from MLS (Feb. 3.34-36p4)
Observations of other objects
K09B77E 2009 BE77 (Q=4.685 AU, arc=3 days, H=18.0 ~851m) from ARO (Feb. 3.02-03p2)
K09B71K 2009 BK71 (i=36.1°, arc=4 days, H=19.5 ~426m) from ARO (Feb. 3.09-10p3)
K09B58P 2009 BP58 (arc=5 days, H=18.6 ~645m) from Desert Moon Obs. (Feb. 3.44-47p3)
K09B05T 2009 BT5 (arc=14 days, H=20.6 ~257m) from MLS (Feb. 3.45-46p3)
K09A16H 2009 AH16 (arc=19 days, H=17.6 ~1.02 km) from LINEAR (Feb. 3.40-45p5)
K09A16F 2009 AF16 (arc=19 days, H=21.1 ~204m) from ARO (Feb. 3.14-15p3)
K09A00M 2009 AM (Q=4.762 AU, arc=33 days, H=21.4 ~178m) from Desert Moon Obs. (Feb. 3.24-28p3)
K08Y32Z 2008 YZ32 (arc=34 days, H=20.2 ~309m) from Desert Moon Obs. (Feb. 3.11-15p2 & 3.20p1)
K08Y32X 2008 YX32 (arc=34 days, H=20.8 ~234m) from ARO (Feb. 3.03-04p3)
K08Y02K 2008 YK2 (arc=45 days, H=19.5 ~426m) from Bergen-Enkheim Obs. (Feb. 2.99p1, 3.06p1, 3.12p1 & 3.17p1)
K08X00P 2008 XP (arc=64 days, H=21.4 ~178m) from MLS (Feb. 3.17-18p3)
K08W60H 2008 WH60 (arc=72 days, H=20.9 ~224m) from ARO (Feb. 3.03-06p3 at V=21.9-22.1)
K08T25V 2008 TV25 (arc=117 days, H=20.0 ~339m) from Spacewatch 0.9m (Feb. 3.52-55p3)
K08Q11S 2008 QS11 (arc=160 days, H=19.9 ~355m) from LINEAR (Feb. 3.30-33p3)
K08Q03T 2008 QT3 (arc=162 days, H=18.8 ~589m) from Hamamatsu-Yuto Obs. (Feb. 2.45-47p5)
K08J00G 2008 JG (arc=2 opp, H=20.9 ~224m) from Calar Alto Obs. (Jan. 30.13-14p3 at C=21.7-22.1)
K08E00E 2008 EE (arc=2 opp, H=19.6 ~407m) from LINEAR (Feb. 3.33-38p5)
K07M13K 2007 MK13 (arc=3 opp, H=20.0 ~339m) from CSS (Feb. 3.39-41p4)
K07D08K 2007 DK8 (arc=2 opp, H=19.0 ~537m) from Desert Moon Obs. (Feb. 3.32-39p3)
K07B02T 2007 BT2 (arc=3 opp, H=17.1 ~1.29 km) from LINEAR (Feb. 3.39-44p5)
K06SL7X 2006 SX217 (arc=3 opp, H=18.8 ~589m) from CSS (Feb. 3.48-50p3)
K06B10C 2006 BC10 (arc=3 opp, H=19.4 ~446m) from Mirasteilas Obs. (Feb. 3.94-95p3)
K06A02S 2006 AS2 (arc=4 opp, H=20.4 ~282m) from Hamamatsu-Yuto Obs. (Feb. 2.52-55p8)
K05N01J 2005 NJ1 (arc=4 opp, H=18.5 ~676m) from Spacewatch 0.9m (Feb. 3.46-49p3)
K05B00C 2005 BC (arc=2 opp, H=18.0 ~851m) from El Leoncito Obs. (Jan. 29.16-17p3, Feb. 1.20-21p3 & 2.16-18p3)
K03X22B 2003 XB22 (arc=3 opp, H=19.3 ~467m) from MLS (Feb. 3.12-13p4) and LINEAR (Feb. 3.21-26p4)
K03Q47M 2003 QM47 (arc=4 opp, H=18.2 ~776m) from El Leoncito Obs. (Feb. 1.22-23p3)
K02X90P 2002 XP90 (arc=3 opp, H=18.5 ~676m) from CSS (Feb. 3.32-35p4)
K02P80G 2002 PG80 (arc=3 opp, H=18.5 ~676m) from MLS (Feb. 3.43-44p3) and Spacewatch 0.9m (Feb. 3.47-50p3)
K02A05C 2002 AC5 (arc=3 opp, H=19.9 ~355m) from CSS (Feb. 3.23-24p4)
K01P01D 2001 PD1 (arc=3 opp, H=18.2 ~776m) from MLS (Feb. 3.38p3 & 3.47p4)
K01B16J 2001 BJ16 (arc=4 opp, H=18.6 ~645m) from Eric Elst via Uccle Obs. (Jan. 31.04p2)
K00K44N 2000 KN44 (Q=4.248 AU, arc=2 opp, H=18.6 ~645m) from CSS (Feb. 3.44-53p7)
K00F01L 2000 FL1 (i=43.6°, Q=4.178 AU, arc=2 opp, H=15.4 ~2.82 km, q=1.291 AU) from CSS (Feb. 3.44-47p4) and LINEAR (Feb. 3.45-49p5)
K00B19L 2000 BL19 (Q=4.472 AU, arc=2 opp, H=19.9 ~355m) from Hamamatsu-Yuto Obs. (Feb. 2.62-65p4)
G8378 168378 1997 ET30 from MLS (Feb. 3.19-21p4)
G2900 162900 2001 HG31 from LINEAR (Feb. 3.16-20p5)
G2385 162385 2000 BM19 from LINEAR (Feb. 3.46p1)
F9923 159923 2004 YJ32 from Spacewatch 1.8m (Feb. 3.19-24p3)
F3958 153958 2002 AM31 from Spacewatch 0.9m (Jan. 31.40-44p3)
E2348 142348 2002 RX211 from Mirasteilas Obs. (Feb. 4.07-08p3)
E1765 141765 2002 MP3 from Mirasteilas Obs. (Feb. 4.06-07p3)
E1052 141052 2001 XR1 from Desert Moon Obs. (Feb. 3.08p5)
D7925 137925 2000 BJ19 from MLS (Feb. 3.45-46p4)
B1253 111253 2001 XU10 from Mirasteilas Obs. (Feb. 3.88-89p3)
85938 85938 1999 DJ4 from LINEAR (Feb. 3.22-27p5)
36284 36284 2000 DM8 from LINEAR (Feb. 3.27-32p5)
22771 22771 1999 CU3 from Mirasteilas Obs. (Feb. 3.90-91p3)
22753 22753 1998 WT from Spacewatch 0.9m (Feb. 3.23-27p3)
18882 18882 1999 YN4 from El Leoncito Obs. (Jan. 29.25-26p3)
18109 18109 2000 NG11 from Spacewatch 0.9m (Feb. 2.35p1)
16834 16834 1997 WU22 from El Leoncito Obs. (Jan. 29.12-14p3, Feb. 1.16-18p3, 2.13-14p3 & 3.13-15p3)
14402 14402 1991 DB from El Leoncito Obs. (Jan. 29.29-30p3)
12923 12923 Zephyr (1999 GK4) from MLS (Feb. 3.23-24p4)
08034 8034 Akka (1992 LR) from Spacewatch 0.9m (Feb. 3.41-44p3)
07358 7358 Oze (1995 YA3) from Mirasteilas Obs. (Feb. 3.87-88p3)
06050 6050 Miwablock (1992 AE) from Spacewatch 0.9m (Feb. 2.46-49p3)
05863 5863 Tara (1983 RB) from MLS (Feb. 3.31-32p4)
04957 4957 Brucemurray (1990 XJ) from El Leoncito Obs. (Jan. 29.22-23p3 & Feb. 1.24-26p3)
04596 4596 1981 QB from El Leoncito Obs. (Feb. 1.28-30p3)
04179 4179 Toutatis (1989 AC) from Mirasteilas Obs. (Feb. 4.04-06p3)
01917 1917 Cuyo (1968 AA) from El Leoncito Obs. (Feb. 1.14-16p4 & 2.11-12p3)
01036 1036 Ganymed (1924 TD) from El Leoncito Obs. (Jan. 29.27-29p3, Feb. 1.27-28p3 & 2.25-26p3)

MPEC 2009-C29 - "05:09 UT" - 2007 BG29

K07B29G 2007 BG29 (H=18.0 ~851m) from Young/Table Mtn. (Feb. 1.09-11p4 & 4.10-12p4)

Observers on 4 February '09

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

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 10 in MPECs 2009-C30 & 2009-C43 -- 2009 CC2, 2009 BL58, 2009 BK71, 2009 BH2, 2009 BE77, 2009 BD81, 2009 BA11, 2009 AF16, 2008 YX32, 2008 WH60
`A74`	Bergen-Enkheim Obs. in Germany, 3 in MPECs 2009-C30 & 2009-C45 -- 2009 CV, 2009 CR2, 2008 YK2
`493`	Calar Alto Obs. in Spain, 1 in MPEC 2009-C30 -- 2008 JG
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2009-C30, 2009-C31, 2009-C41, 2009-C43 & 2009-C45 -- 2009 CR2, 2009 CQ1, 2009 CC2, 2009 CA2, 2007 MK13, 2006 SX217, 2002 XP90, 2002 AC5, 2000 KN44, 2000 FL1
`448`	Desert Moon Obs. in New Mexico, 5 in MPEC 2009-C30 -- 2009 BP58, 2009 AM, 2008 YZ32, 2007 DK8, 141052
`808`	El Leoncito Obs. in Argentina, 9 in MPEC 2009-C30 -- 2005 BC, 2003 QM47, 18882, 16834, 14402, 4957, 4596, 1917, 1036
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2009-C30 -- 2008 QT3, 2006 AS2, 2000 BL19
`704`	LINEAR in New Mexico, 13 in MPECs 2009-C30, 2009-C31, 2009-C33 & 2009-C37 -- 2009 CW1, 2009 CS1, 2009 CQ1, 2009 AH16, 2008 QS11, 2008 EE, 2007 BT2, 2003 XB22, 2000 FL1, 85938, 36284, 162900, 162385
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2009-C32, 2009-C35, 2009-C36 & 2009-C40 -- 2009 CZ1, 2009 CV1, 2009 CU1, 2009 CR1
`B67`	Mirasteilas Obs. in Switzerland, 7 in MPEC 2009-C30 -- 2006 BC10, 22771, 142348, 141765, 111253, 7358, 4179
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 26 in MPECs 2009-C30, 2009-C31, 2009-C32, 2009-C33, 2009-C34, 2009-C35, 2009-C36, 2009-C37, 2009-C38, 2009-C39, 2009-C40, 2009-C41, 2009-C42, 2009-C43 & 2009-C44 -- 2009 CZ1, 2009 CY1, 2009 CX1, 2009 CW1, 2009 CV1, 2009 CU1, 2009 CT1, 2009 CS1, 2009 CR1, 2009 CQ1, 2009 CD2, 2009 CC2, 2009 CB2, 2009 CA2, 2009 BT5, 2009 BQ5, 2009 BN2, 2008 XP, 2003 XB22, 2002 PG80, 2001 PD1, 1999 AJ39, 168378, 137925, 12923, 5863
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2009-C45 -- 2009 CR2
`H06%`	Ernesto Guido in Italy via RAS Obs. Mayhill in New Mexico, 1 in MPEC 2009-C45 -- 2009 CR2
`854`	Sabino Canyon Obs. in Arizona, 3 in MPECs 2009-C31, 2009-C33 & 2009-C43 -- 2009 CS1, 2009 CQ1, 2009 CC2
`H36`	Sandlot Obs. in Kansas, 4 in MPECs 2009-C32, 2009-C33, 2009-C35 & 2009-C42 -- 2009 CU1, 2009 CS1, 2009 CR1, 2009 CB2
`H85`	Silver Spring Obs. in Maryland, 1 in MPEC 2009-C31 -- 2009 CQ1
`2492`	LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2009-C46 & 2009-C47 -- C/2008 W3, C/2008 W2, C/2008 V6, C/2008 V5, C/2008 V4, C/2008 V3, C/2008 V2, C/2008 V1
`2493`	LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 2 in MPECs 2009-C46 & 2009-C47 -- C/2008 W3, C/2008 V1
`691`	Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2009-C30 & 2009-C34 -- 2009 CT1, 2009 BH11, 2008 VA15, 2008 TV25, 2005 NJ1, 2002 PG80, 22753, 18109, 153958, 8034, 6050
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPECs 2009-C30, 2009-C32, 2009-C34, 2009-C35, 2009-C39 & 2009-C42 -- 2009 CY1, 2009 CU1, 2009 CT1, 2009 CR1, 2009 CB2, 2009 BC58, 159923
`611`	Starkenburg Obs. in Germany, 1 in MPEC 2009-C30 -- 2009 CV
`6735`	Jim Young via Table Mtn. Obs. in southern California, 5 in MPECs 2009-C29, 2009-C31, 2009-C33, 2009-C43 & 2009-C45 -- 2009 CS1, 2009 CR2, 2009 CQ1, 2009 CC2, 2007 BG29
`0121`	Eric Elst via Uccle Obs. in Belgium, 1 in MPEC 2009-C30 -- 2001 BJ16
`198`	Wildberg Obs. in Germany, 1 in MPEC 2009-C30 -- 2009 CV

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

Impact Risk Monitoring on 4 February '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 CR2	JPL Sentry	2358	2019-2107	8	8.6e-09	-3.31	-3.36	0	JPL: "Analysis based on 19 observations spanning 1.5909 days (2009-Feb-03.30293 to 2009-Feb-04.89386)." Diameter approximately 1.600 km. from mean, weighted H=16.7.

2009 CD2	JPL Sentry	2116	2027-2107	3	2.4e-08	-8.84	-9.30	0	JPL: "Analysis based on 14 observations spanning .15108 days (2009-Feb-04.31926 to 2009-Feb-04.47034)." Diameter approximately 0.012 km. from mean, weighted H=27.1.

2009 CZ1	JPL Sentry	1923	2014-2106	48	1.2e-06	-5.52	-6.16	0	JPL: "Analysis based on 19 observations spanning 1.0234 days (2009-Feb-03.38609 to 2009-Feb-04.40948)." Diameter approximately 0.042 km. from mean, weighted H=24.5.

2009 CV	JPL Sentry	1532	R E M O V E D						JPL: Risk listing removed at 0957 UTC.

2009 CT	NEODyS	1532	2016-2079	11	2.27e-10	-5.93	-6.45	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2009/02/02.483 to 2009/02/03.554."

2009 CS	NEODyS	1532	2033	2	2.87e-11	-7.10	-7.40	0	NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2009/02/02.413 to 2009/02/03.475."

2009 BD81	JPL Sentry	1532	2042-2090	4	2.0e-07	-4.37	-4.66	0	JPL: "Analysis based on 21 observations spanning 2.9160 days (2009-Jan-31.10076 to 2009-Feb-03.016804)." Diameter approximately 0.304 km. from mean, weighted H=20.2.
2009 BD81	NEODyS	1532	2042-2065	5	1.27e-07	-4.44	-4.52	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2009/01/31.102 to 2009/02/03.018."

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 4 February '09

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

2358	Noted that JPL Sentry has posted 2009 CR2 as an impact risk - see above
2307	Grabbed MPEC 2009-C46 - Comets C/2008 V1, 2008 V2, 2008 V3, 2008 V4 (SOHO) - see above Grabbed MPEC 2009-C47 - Comets C/2008 V5, 2008 V6, 2008 W2, 2008 W3 (SOHO) - see above
2230	Grabbed MPEC 2009-C45 - 2009 CR2 - see above
2116	Noted that JPL Sentry has posted 2009 CD2 as an impact risk - see above
1923	Noted that JPL Sentry has posted 2009 CZ1 as an impact risk - see above
1800	Grabbed MPEC 2009-C43 - 2009 CC2 - see above Grabbed MPEC 2009-C44 - 2009 CD2 - see above
1716	Grabbed MPEC 2009-C34 - 2009 CT1 - see above Grabbed MPEC 2009-C35 - 2009 CU1 - see above Grabbed MPEC 2009-C36 - 2009 CV1 - see above Grabbed MPEC 2009-C37 - 2009 CW1 - see above Grabbed MPEC 2009-C38 - 2009 CX1 - see above Grabbed MPEC 2009-C39 - 2009 CY1 - see above Grabbed MPEC 2009-C40 - 2009 CZ1 - see above Grabbed MPEC 2009-C41 - 2009 CA2 - see above Grabbed MPEC 2009-C42 - 2009 CB2 - see above
1647	Grabbed MPEC 2009-C31 - 2009 CQ1 - see above Grabbed MPEC 2009-C32 - 2009 CR1 - see above Grabbed MPEC 2009-C33 - 2009 CS1 - see above
1532	Noted that JPL Sentry has updated its 2009 BD81 risk assessment - see above Noted that NEODyS has updated its 2009 BD81 risk assessment - see above Noted that NEODyS has posted 2009 CS as an impact risk - see above Noted that NEODyS has posted 2009 CT as an impact risk - see above Noted that JPL Sentry has removed 2009 CV as an impact risk - see above Grabbed MPEC 2009-C30 - Daily Orbit Update - see above
0518	Grabbed MPEC 2009-C29 - 2007 BG29 - see above

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