2010-02-17 Tracking News

Contents on 17 February '10

Radar Astrometry -- one object
IAU Minor Planet Center
- NEOCP Activity -- 13 listings: 5 new, 8 updated
- New MPECs -- 22 MPECs
Observers -- 21 observing facilities
Impact Risk Monitoring -- thirteen 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.

Radar Astrometry on 17 February '10

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added or updated the following small-body radar observing work:

Data update noted at 2231 UTC when the database was dated 17 Feb.

2009 UN3 from Goldstone DSS-14 70m antenna (Feb. 9.53 velocity & 9.56 range) - see links

NEOCP Activity on 17 February '10

The MPC's NEO Confirmation Page has 13 listings: 5 new, 8 updated

When last checked at 2358 UTC today, the Minor Planet Center's Near Earth Object discovery Confirmation Page (NEOCP) had five new and eight updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 40 listings on the NEOCP at some point today.

New MPECs on 17 February '10

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been 22 MPECs posted today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2010-D17 time-stamped "07:22 UT" - Daily Orbit Update - see below
MPEC 2010-D18 time-stamped "19:32 UT" - 2007 LQ19 - see below
MPEC 2010-D19 time-stamped "19:45 UT" - 2009 NJ - see below
MPEC 2010-D20 time-stamped "19:49 UT" - 2010 CA55 - see below
MPEC 2010-D21 time-stamped "19:54 UT" - 2010 CB55 - see below
MPEC 2010-D22 time-stamped "19:56 UT" - 2010 CC55 - see below
MPEC 2010-D23 time-stamped "19:59 UT" - 2010 CD55 - see below
MPEC 2010-D24 time-stamped "20:02 UT" - 2010 CE55 - see below
MPEC 2010-D25 time-stamped "20:04 UT" - 2010 CF55 - see below
MPEC 2010-D26 time-stamped "20:07 UT" - 2010 CG55 - see below
MPEC 2010-D27 time-stamped "20:09 UT" - 2010 CH55 - see below
MPEC 2010-D28 time-stamped "20:12 UT" - 2010 DF - see below
MPEC 2010-D29 time-stamped "20:15 UT" - 2010 DG - see below
MPEC 2010-D30 time-stamped "20:17 UT" - 2010 DH - see below
MPEC 2010-D31 time-stamped "20:20 UT" - 2010 DJ - see below
MPEC 2010-D32 time-stamped "20:25 UT" - 2010 DK - see below
MPEC 2010-D33 time-stamped "20:27 UT" - 2010 DL - see below
MPEC 2010-D34 time-stamped "20:29 UT" - 2010 DM - see below
MPEC 2010-D35 time-stamped "20:33 UT" - 2010 DN - see below
MPEC 2010-D36 time-stamped "21:11 UT" - 2010 DC - see below
MPEC 2010-D37 time-stamped "21:14 UT" - 2010 DO - see below
MPEC 2010-D38 time-stamped "21:17 UT" - 2010 DP

MPEC 2010-D38 - "21:17 UT" - 2010 DP

K10D00P 2010 DP (risk-listed, H=18.9 ~562m) was discovered at 1230 UT on 16 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 16.52-54p4. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 17.49-51p4) and Tenagra II Obs. (Feb. 17.51-52p3).

MPEC 2010-D37 - "21:14 UT" - 2010 DO

K10D00O 2010 DO (Earth MOID=6.3 LD, H=21.5 ~170m) was discovered at 0933 UT on 16 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 16.40-42p4 and 16.47-48p3. The discovery was confirmed by Tenagra II Obs. (Feb. 17.37p3) and Sandlot Obs. (Feb. 17.39-40p4).

MPEC 2010-D36 - "21:11 UT" - 2010 DC

K10D00C 2010 DC (H=20.8 ~234m) was discovered at 0559 UT on 16 Feb. by CSS, which observed it at Feb. 16.25-32p7. The discovery was confirmed by MLS (Feb. 17.42-43p4).

MPEC 2010-D35 - "20:33 UT" - 2010 DN

K10D00N 2010 DN (small asteroid, H=22.3 ~117m) was discovered at 0905 UT on 16 Feb. by MLS, which observed it at Feb. 16.38p5 and 17.34-35p4.

MPEC 2010-D34 - "20:29 UT" - 2010 DM

K10D00M 2010 DM (risk-listed, q=0.354 AU, H=18.9 ~562m) was discovered at 0748 UT on 16 Feb. by MLS, which observed it at Feb. 16.33-37p7 at V=20.8-22.3 and 17.44-45p3 at V=21.4-8. The discovery was confirmed by the Spacewatch 1.8m telescope (Feb. 17.29-30p3).

MPEC 2010-D33 - "20:27 UT" - 2010 DL

K10D00L 2010 DL (small asteroid, Earth MOID=7.3 LD, H=26.8 ~15m) was discovered at 0747 UT on 16 Feb. by MLS, which observed it at Feb. 16.32-34p4 at V=20.8-21.6, 16.41-44p4 at V=20.2-22.7, and 17.40-41p3 at V=21.1-22.1.

MPEC 2010-D32 - "20:25 UT" - 2010 DK

K10D00K 2010 DK (small asteroid, H=22.9 ~89m) was discovered at 0746 UT on 16 Feb. by MLS, which observed it at Feb. 16.32-37p9 at V=20.9-21.7 and 17.40-41p4 at V=21.1-22.9.

MPEC 2010-D31 - "20:20 UT" - 2010 DJ

K10D00J 2010 DJ (risk-listed, H=26.5 ~17m) was discovered at 0650 UT on 16 Feb. by MLS, which observed it at Feb. 16.29-31p4 at V=21.0-22.0, 16.35-36p5 at V=21.7-22.2, and 17.38-39p4 at V=22.0-22.6.

MPEC 2010-D30 - "20:17 UT" - 2010 DH

K10D00H 2010 DH (H=20.1 ~323m) was discovered at 0649 UT on 16 Feb. by MLS, which observed it at Feb. 16.28-31p4 at V=21.2-22.0, 16.35-36p4 at V=21.6-22.2, and 17.33p4 at V=21.8-22.7. The discovery was confirmed by MRO (Feb. 17.29-30p4).

MPEC 2010-D29 - "20:15 UT" - 2010 DG

K10D00G 2010 DG (small asteroid, H=24.8 ~37m) was discovered at 0519 UT on 16 Feb. by MLS, which observed it at Feb. 16.22-24p4, 16.31p4, and 17.29p4. The discovery was confirmed by Astronomical Research Obs. Westfield (ARO Westfield) (Feb. 17.13-17p3), Tenagra II Obs. (Feb. 17.23-24p2), and Sandlot Obs. (Feb. 17.23-27p3).

MPEC 2010-D28 - "20:12 UT" - 2010 DF

K10D00F 2010 DF (small asteroid, H=24.5 ~43m) was discovered at 0517 UT on 16 Feb. by MLS, which observed it at Feb. 16.22-24p4, 16.31p2, 16.38p4, and 17.28-29p4. The discovery was confirmed by Tenagra II Obs. (Feb. 17.18-20p3) and ARO Westfield (Feb. 17.19-22p5).

MPEC 2010-D27 - "20:09 UT" - 2010 CH55

K10C55H 2010 CH55 (risk-listed, H=19.7 ~389m) was discovered at 1111 UT on 15 Feb. by MLS, which observed it at Feb. 15.47-49p4 at V=21.3-22.1, 16.45-47p4 at V=20.9-21.3, and 17.47-48p4 at V=20.9-21.9. The discovery was confirmed by MRO (Feb. 15.50-52p4 & 17.38-41p4) and Spacewatch 1.8m (Feb. 17.31-32p3).

MPEC 2010-D26 - "20:07 UT" - 2010 CG55

K10C55G 2010 CG55 (i=144.9°, q=2.498 AU, Q=8.449 AU, H=14.4 ~4.46 km) was discovered at 0833 UT on 15 Feb. by CSS, which observed it at Feb. 15.36-38p3. The discovery was confirmed by Remanzacco Obs. (Feb. 16.08p2), Sandlot Obs. (Feb. 16.42-43p4), Kanab Obs. (Feb. 16.44-47p2), MLS (Feb. 16.47-49p3 & 17.49-51p4), Tenagra II Obs. (Feb. 16.50p3), MRO (Feb. 17.39-41p4), and Spacewatch 1.8m (Feb. 17.40-41p3).

MPEC 2010-D25 - "20:04 UT" - 2010 CF55

K10C55F 2010 CF55 (borderline-small, H=22.0 ~135m) was discovered at 0813 UT on 15 Feb. by MLS, which observed it at Feb. 15.34-36p4, 16.32-34p4, and 17.42-43p4.

MPEC 2010-D24 - "20:02 UT" - 2010 CE55

K10C55E 2010 CE55 (small asteroid, H=22.6 ~102m) was discovered at 0602 UT on 15 Feb. by MLS, which observed it at Feb. 15.25-27p4 at V=21.0-6, 15.33-34p4 at V=21.8-22.7, 16.22-24p3 at V=21.2-22.1, and 17.28-29p4 at V=20.8-21.4. The discovery was confirmed by MRO (Feb. 15.30-32p4 & 17.26-28p4) and Spacewatch 1.8m (Feb. 15.33-34p3 & 16.21-22p3).

MPEC 2010-D23 - "19:59 UT" - 2010 CD55

K10C55D 2010 CD55 (small asteroid, Earth MOID=4.8 LD, H=22.9 ~89m) was discovered at 0456 UT on 15 Feb. by LINEAR, which observed it at Feb. 15.21-25p5 and 16.15-21p5. The discovery was confirmed by Sabino Canyon Obs. (Feb. 17.32p3).

MPEC 2010-D22 - "19:56 UT" - 2010 CC55

K10C55C 2010 CC55 (small asteroid, H=22.1 ~129m) was discovered at 0515 UT on 11 Feb. by WISE, which observed it at Feb. 11.22p1, 11.35p1, 11.48p1, 11.62p1, 11.68p1, 11.81p1, and 11.95p1. The discovery was confirmed by Spacewatch 1.8m (Feb. 17.46-48p5) and MRO (Feb. 17.51-54p4 at R=21.4-22.3).

MPEC 2010-D21 - "19:54 UT" - 2010 CB55

K10C55B 2010 CB55 (small asteroid, H=22.5 ~107m) was discovered at 0747 UT on 9 Feb. by CSS, which observed it at Feb. 9.32-34p4. The discovery was confirmed by MLS (Feb. 16.20-25p8 & 16.37p3), Tenagra II Obs. (Feb. 16.41-42p3 & 17.21-22p3), MRO (Feb. 17.20-22p4), Sandlot Obs. (Feb. 17.21-22p3), ARO Westfield (Feb. 17.22-23p3), Sabino Canyon Obs. (Feb. 17.33p1), and Dave Balam via Plaskett 1.8m Telescope (Feb. 17.34-35p5).

MPEC 2010-D20 - "19:49 UT" - 2010 CA55

K10C55A 2010 CA55 (i=54.2°, H=20.4 ~282m) was discovered at 1353 UT on 5 Feb. by WISE, which observed it at Feb. 5.58p1, 5.71p1, 5.84p1, 5.91p1, 6.24p1, 6.31p1, 6.37p1, 6.57p1, 6.64p1, 6.90p1, 6.97p1, 7.30p1, 7.63p1, 7.70p1, 7.76p1, 7.83p1, and 7.96p1.

MPEC 2010-D19 - "19:45 UT" - 2009 NJ

K09N00J 2009 NJ (H=18.6 ~645m) from Tenagra II Obs. (Feb. 16.37-39p3 & 17.41-43p3)

MPEC 2010-D18 - "19:32 UT" - 2007 LQ19

K07L19Q 2007 LQ19 (Q=4.248 AU, Earth MOID=0.4 LD, H=17.2 ~1.23 km) from David Tholen's team on Mauna Kea (Jan. 18.48-49p4 at R=22.7-23.1 & 19.58-59p2 at R=22.9)

<< DOU on 17 Feb. '10 >> MPEC 2010-D17 - "07:22 UT" - Daily Orbit Update

Observations of risk-listed objects
K10C44O 2010 CO44 (small asteroid, arc=2 days, H=24.6 ~41m) from Spacewatch 1.8m (Feb. 17.22-23p3)
K10C19S 2010 CS19 (small asteroid, arc=1 day, H=28.0 ~9m) from Spacewatch 1.8m (Feb. 16.33-34p3) and MLS (Feb. 16.47-49p4)
K10C19Q 2010 CQ19 (small asteroid, Q=4.866 AU, arc=1 day, H=27.1 ~13m) from Spacewatch 1.8m (Feb. 16.36-37p2)
K10C19K 2010 CK19 (small asteroid, arc=2 days, H=27.9 ~9m) from Spacewatch 1.8m (Feb. 16.47p2)
K10C19F 2010 CF19 (almost small, arc=3 days, H=21.8 ~148m) from Spacewatch 1.8m (Feb. 17.11-12p3)
K10C19D 2010 CD19 (arc=3 days, H=18.0 ~851m) from LINEAR (Feb. 15.09-14p5) and Spacewatch 1.8m (Feb. 17.09-10p3)
K10C05R 2010 CR5 (Q=5.676 AU, arc=8 days, H=19.8 ~371m) from Spacewatch 1.8m (Feb. 16.20p6 & 17.23-24p3 at V=22.0-22.1)
Observations of recently (no longer) risk-listed objects
K10C19J 2010 CJ19 (i=40.2°, q=1.802 AU, arc=2 days, H=18.2 ~776m) from Spacewatch 1.8m (Feb. 16.38p2)
K10C01J 2010 CJ1 (small asteroid, arc=7 days, H=24.1 ~51m) from MLS (Feb. 16.28-30p4)
Observations of small asteroids (H>22.0)
K10C19O 2010 CO19 (arc=1 day, H=25.8 ~23m) from MLS (Feb. 16.22-24p4)
K10C19N 2010 CN19 (arc=0 days, H=26.3 ~19m) from LINEAR (Feb. 15.27-32p5)
K10C19M 2010 CM19 (arc=2 days, H=24.9 ~35m) from MLS (Feb. 16.50-52p4)
K10C18J 2010 CJ18 (arc=3 days, H=26.7 ~15m) from CSS (Feb. 16.34-36p4)
K02X38Y 2002 XY38 (arc=2 opp, H=23.0 ~85m) from Walnut Creek Obs. (Feb. 17.18p3)
Observations of other objects
K10C44M 2010 CM44 (arc=3 days, H=18.9 ~562m) from Kanab Obs. (Feb. 16.49-51p2)
K10C19L 2010 CL19 (Q=5.434 AU, arc=3 days, H=17.3 ~1.17 km) from MLS (Feb. 16.12-14p4)
K10C00M 2010 CM (Q=4.021 AU, arc=36 days, H=18.4 ~708m) from Spacewatch 1.8m (Feb. 17.19-20p3)
K10B03B 2010 BB3 from Petit Jean Mtn. South Obs. (PJMSO) (Feb. 16.42p6)
K10A00J 2010 AJ (Q=4.549 AU, arc=42 days, H=20.2 ~309m) from Spacewatch 1.8m (Feb. 17.20-21p3)
K09U03N 2009 UN3 (i=37.4°, arc=120 days, H=18.4 ~708m) from Doc Greiner Research Obs. (DGRO) (Feb. 14.23p7) and PJMSO (Feb. 16.48-49p6)
K09S01X 2009 SX1 (arc=2 opp, H=18.8 ~589m) from CSS (Feb. 16.46-48p4)
K09S00P 2009 SP (arc=150 days, H=19.5 ~426m) from WISE (Feb. 14.23p2, 14.29p1, 14.36p1, 14.42p1, 14.49p1 & 14.62p1)
K08E00E 2008 EE (arc=3 opp, H=19.7 ~389m) from PJMSO (Feb. 16.49-50p5)
K07B29G 2007 BG29 (arc=3 opp, H=18.0 ~851m) from WISE (Feb. 13.39p1, 13.59p1, 13.66p1, 13.73p2, 13.79p1, 13.86p1, 14.32p1, 14.65p1, 14.72p1, 14.78p1, 14.85p1, 14.92p1, 14.98p1, 15.11p1, 15.18p1 & 15.31p1)
K06U00R 2006 UR (arc=2 opp, H=19.4 ~446m) from CSS (Feb. 16.31-34p4)
K06P01A 2006 PA1 (arc=3 opp, H=19.7 ~389m) from the Spacewatch 0.9m telescope (Feb. 10.35-37p2)
K06G00U 2006 GU (Q=4.274 AU, arc=2 opp, H=17.7 ~977m) from Spacewatch 1.8m (Feb. 16.29-30p3)
K06E71F 2006 EF71 (arc=2 opp, H=19.0 ~537m) from Spacewatch 1.8m (Feb. 16.51-52p3)
K06E01E 2006 EE1 (i=36.4°, arc=2 opp, H=19.7 ~389m) from CSS (Feb. 16.44-46p4)
K06A04O 2006 AO4 (Q=4.162 AU, arc=4 opp, H=15.5 ~2.69 km, q=1.098 AU) from MLS (Feb. 16.19-21p4) and LINEAR (Feb. 16.22-27p5)
K05EV8D 2005 ED318 (arc=2 opp, H=20.8 ~234m) from Spacewatch 0.9m (Feb. 10.28-32p3)
K03C11H 2003 CH11 (i=36.4°, arc=2 opp, H=19.4 ~446m) from LINEAR (Feb. 15.21-25p5) and PJMSO (Feb. 16.10p5)
K03B47T 2003 BT47 (arc=4 opp, H=17.4 ~1.12 km) from LINEAR (Feb. 15.27-32p5) and PJMSO (Feb. 16.41p5)
K02P43G 2002 PG43 (arc=4 opp, H=18.2 ~776m) from Spacewatch 0.9m (Feb. 10.17-19p2)
K02L00V 2002 LV (arc=3 opp, H=16.6 ~1.62 km) from LINEAR (Feb. 14.16-21p5)
K02AC9J 2002 AJ129 (q=0.117 AU, arc=3 opp, H=18.5 ~676m) from LINEAR (Feb. 15.27-32p5) and Walnut Creek Obs. (Feb. 17.19-20p3)
K01R11Z 2001 RZ11 (i=53.1°, arc=4 opp, H=16.3 ~1.86 km) from Spacewatch 0.9m (Feb. 16.15-18p3)
K01P09T 2001 PT9 (arc=2 opp, H=20.6 ~257m) from LINEAR (Feb. 16.28-33p5) and PJMSO (Feb. 16.42-43p5)
K01J01W 2001 JW1 (arc=3 opp, H=20.2 ~309m) from Spacewatch 1.8m (Feb. 16.50-51p3)
K00CA1O 2000 CO101 (arc=2 opp, H=19.0 ~537m) from PJMSO (Feb. 16.49p5)
J99V11O 1999 VO11 (arc=3 opp, H=18.6 ~645m) from MLS (Feb. 16.10-11p3)
J96B01A 1996 BA1 (arc=2 opp, H=20.8 ~234m) from NEAT's GEODSS Haleakala telescope (1996 Feb. 24.53-57p3)
H3664 173664 2001 JU2 from MLS (Feb. 16.42-44p4)
H2722 172722 2004 BV102 from LINEAR (Feb. 16.29-32p3)
H2718 172718 2004 BD85 from MLS (Feb. 16.17-19p4)
G2038 162038 1996 DH from Walnut Creek Obs. (Feb. 16.27-28p3)
F4656 154656 2004 FE3 from MLS (Feb. 16.38-41p4 at V=21.7-22.3)
F2941 152941 2000 FM10 from CSS (Feb. 16.15-17p3)
E4861 144861 2004 LA12 from Spacewatch 0.9m (Feb. 14.20-23p3)
96590 96590 1998 XB from LINEAR (Feb. 15.08-13p5)
85990 85990 1999 JV6 from LINEAR (Feb. 15.33-38p3)
68359 68359 2001 OZ13 from LINEAR (Feb. 14.41-46p5)
11398 11398 1998 YP11 from LINEAR (Feb. 14.15-20p5)
11066 11066 Sigurd (1992 CC1) from Vicksburg Obs. (Feb. 16.38p2)
10165 10165 1995 BL2 from LINEAR (Feb. 16.22-26p5)
10145 10145 1994 CK1 from Spacewatch 0.9m (Feb. 16.27-31p3)
08201 8201 1994 AH2 from LINEAR (Feb. 12.09-13p3 & 14.09-14p5) and MLS (Feb. 16.14-16p4)
05693 5693 1993 EA from LINEAR (Feb. 15.33-38p5)
03671 3671 Dionysus (1984 KD) from LINEAR (Feb. 13.40-45p5)
02062 2062 Aten (1976 AA) from MLS (Feb. 16.12-14p4)
01627 1627 Ivar (1929 SH) from LINEAR (Feb. 16.28-33p5)

Observers on 17 February '10

A total of 21 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H21`	Astronomical Research Obs. Westfield (ARO Westfield) in Illinois, 3 in MPECs 2010-D21, 2010-D28 & 2010-D29 -- 2010 DG, 2010 DF, 2010 CB55
`703`	Catalina Sky Survey (CSS) in Arizona, 9 in MPECs 2010-D17, 2010-D21, 2010-D26, 2010-D36 & 2010-D37 -- 2010 DO, 2010 DC, 2010 CJ18, 2010 CG55, 2010 CB55, 2009 SX1, 2006 UR, 2006 EE1, 152941
`H26`	Doc Greiner Research Obs. in Wisconsin, 1 in MPEC 2010-D17 -- 2009 UN3
`253`	Goldstone DSS-14 70m antenna in southern California, 1 in radar -- 2009 UN3
`682`	Kanab Obs. in Utah, 2 in MPECs 2010-D17 & 2010-D26 -- 2010 CM44, 2010 CG55
`704`	LINEAR in New Mexico, 19 in MPECs 2010-D17 & 2010-D23 -- 2010 CN19, 2010 CD55, 2010 CD19, 2006 AO4, 2003 CH11, 2003 BT47, 2002 LV, 2002 AJ129, 2001 PT9, 96590, 85990, 68359, 172722, 11398, 10165, 8201, 5693, 3671, 1627
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPECs 2010-D21, 2010-D22, 2010-D24, 2010-D26, 2010-D27, 2010-D30 & 2010-D38 -- 2010 DP, 2010 DH, 2010 CH55, 2010 CG55, 2010 CE55, 2010 CC55, 2010 CB55
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2010-D18 -- 2007 LQ19
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 27 in MPECs 2010-D17, 2010-D21, 2010-D24, 2010-D25, 2010-D26, 2010-D27, 2010-D28, 2010-D29, 2010-D30, 2010-D31, 2010-D32, 2010-D33, 2010-D34, 2010-D35, 2010-D36 & 2010-D38 -- 2010 DP, 2010 DN, 2010 DM, 2010 DL, 2010 DK, 2010 DJ, 2010 DH, 2010 DG, 2010 DF, 2010 DC, 2010 CS19, 2010 CO19, 2010 CM19, 2010 CL19, 2010 CJ1, 2010 CH55, 2010 CG55, 2010 CF55, 2010 CE55, 2010 CB55, 2006 AO4, 1999 VO11, 173664, 172718, 154656, 8201, 2062
`566`	NEAT's GEODSS Haleakala telescope in Hawaii, 1 in MPEC 2010-D17 -- 1996 BA1
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 7 in MPEC 2010-D17 -- 2010 BB3, 2009 UN3, 2008 EE, 2003 CH11, 2003 BT47, 2001 PT9, 2000 CO101
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2010-D21 -- 2010 CB55
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2010-D26 -- 2010 CG55
`854`	Sabino Canyon Obs. in Arizona, 2 in MPECs 2010-D21 & 2010-D23 -- 2010 CD55, 2010 CB55
`H36`	Sandlot Obs. in Kansas, 4 in MPECs 2010-D21, 2010-D26, 2010-D29 & 2010-D37 -- 2010 DO, 2010 DG, 2010 CG55, 2010 CB55
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2010-D17 -- 2006 PA1, 2005 ED318, 2002 PG43, 2001 RZ11, 144861, 10145
`291`	Spacewatch 1.8m telescope in Arizona, 18 in MPECs 2010-D17, 2010-D22, 2010-D24, 2010-D26, 2010-D27 & 2010-D34 -- 2010 DM, 2010 CS19, 2010 CR5, 2010 CQ19, 2010 CO44, 2010 CM, 2010 CK19, 2010 CJ19, 2010 CH55, 2010 CG55, 2010 CF19, 2010 CE55, 2010 CD19, 2010 CC55, 2010 AJ, 2006 GU, 2006 EF71, 2001 JW1
`926`	Tenagra II Obs. in Arizona, 7 in MPECs 2010-D19, 2010-D21, 2010-D26, 2010-D28, 2010-D29, 2010-D37 & 2010-D38 -- 2010 DP, 2010 DO, 2010 DG, 2010 DF, 2010 CG55, 2010 CB55, 2009 NJ
`H47`	Vicksburg Obs. in Mississippi, 1 in MPEC 2010-D17 -- 11066
`C51`	WISE in Earth polar orbit, 4 in MPECs 2010-D17, 2010-D20 & 2010-D22 -- 2010 CC55, 2010 CA55, 2009 SP, 2007 BG29
`G56`	Walnut Creek Obs. in northern California, 3 in MPEC 2010-D17 -- 2002 XY38, 2002 AJ129, 162038

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

Impact Risk Monitoring on 17 February '10

**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

2010 DP	JPL Sentry	2358	2020	1	1.1e-10	-6.13	-6.13	0	JPL: "Analysis based on 11 observations spanning .99417 days (2010-Feb-16.52093 to 2010-Feb-17.5151)." Diameter approximately 0.570 km. from mean, weighted H=18.9.

2010 DM	JPL Sentry	2358	2015-2110	29	1.3e-08	-4.87	-5.65	0	JPL: "Analysis based on 13 observations spanning 1.1279 days (2010-Feb-16.32523 to 2010-Feb-17.45315)." Diameter approximately 0.379 km. from mean, weighted H=19.8.

2010 DJ	JPL Sentry	2358	2018-2108	349	1.6e-05	-5.49	-5.79	0	JPL: "Analysis based on 13 observations spanning 1.1058 days (2010-Feb-16.28522 to 2010-Feb-17.39107)." Diameter approximately 0.017 km. from mean, weighted H=26.6.

2010 DA	NEODyS	1422	2016-2080	17	1.64e-06	-2.72	-3.01	0	NEODyS: "Based on 21 optical observations (of which 1 are rejected as outliers) from 2010/02/16.545 to 2010/02/16.934."
2010 DA	JPL Sentry	0235	2016-2109	53	4.1e-06	-2.25	-2.39	0	JPL: "Analysis based on 21 observations spanning .38885 days (2010-Feb-16.54441 to 2010-Feb-16.93326)." Diameter approximately 0.350 km. from mean, weighted H=19.9.

2010 CH55	JPL Sentry	2231	2016-2109	130	2.4e-07	-3.82	-4.95	0	JPL: "Analysis based on 23 observations spanning 2.0166 days (2010-Feb-15.466 to 2010-Feb-17.4826)." Diameter approximately 0.498 km. from mean, weighted H=19.2.

2010 CO44	JPL Sentry	2231	R E M O V E D						JPL: Risk listing removed at 2135 UTC.
2010 CO44	NEODyS	2012	R E M O V E D						NEODyS #2 for the day, following a risk posting noted at 1422 UTC.

2010 CN44	NEODyS	1629	2021-2031	3	3.69e-08	-4.51	-4.77	0	NEODyS: "Based on 12 optical observations (of which 0 are rejected as outliers) from 2010/02/15.111 to 2010/02/16.142."

2010 CS19	JPL Sentry	2102	2092-2104	5	2.1e-05	-6.52	-6.61	0	JPL: "Analysis based on 23 observations spanning 1.1643 days (2010-Feb-15.32692 to 2010-Feb-16.49119)." Diameter approximately 0.009 km. from mean, weighted H=28.0.
2010 CS19	NEODyS	2012	2088	1	8.07e-09	-9.86	-9.86	0	NEODyS: "Based on 24 optical observations (of which 1 are rejected as outliers) from 2010/02/15.328 to 2010/02/16.492."

2010 CQ19	JPL Sentry	2102	2023-2107	6	8.5e-08	-8.23	-8.53	0	JPL: "Analysis based on 16 observations spanning 1.0879 days (2010-Feb-15.27907 to 2010-Feb-16.36695)." Diameter approximately 0.013 km. from mean, weighted H=27.1.
2010 CQ19	NEODyS	2012	2070	1	4.54e-08	-8.47	-8.47	0	NEODyS: "Based on 16 optical observations (of which 0 are rejected as outliers) from 2010/02/15.280 to 2010/02/16.368."

2010 CK19	JPL Sentry	2102	2089-2107	5	1.6e-06	-7.60	-8.09	0	JPL: "Analysis based on 30 observations spanning 2.1365 days (2010-Feb-14.33293 to 2010-Feb-16.46946)." Diameter approximately 0.009 km. from mean, weighted H=27.9.
2010 CK19	NEODyS	2102	2089	2	6.84e-07	-7.95	-8.14	0	NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2010/02/14.334 to 2010/02/16.470."

2010 CF19	JPL Sentry	2144	R E M O V E D						JPL: Risk listing removed at 2131 UTC.
2010 CF19	NEODyS	2012	R E M O V E D						-

2010 CD19	JPL Sentry	2102	R E M O V E D						JPL: Risk listing removed at 2050 UTC.

2010 CR5	JPL Sentry	2102	2019-2107	17	1.3e-07	-4.01	-4.52	0	JPL: "Analysis based on 30 observations spanning 7.9126 days (2010-Feb-09.3273 to 2010-Feb-17.23993)." Diameter approximately 0.383 km. from mean, weighted H=19.7.
2010 CR5	NEODyS	2012	2019-2087	17	9.97e-08	-4.06	-4.57	0	NEODyS: "Based on 30 optical observations (of which 0 are rejected as outliers) from 2010/02/09.328 to 2010/02/17.241."

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 February '10

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

2358	Noted that JPL Sentry has posted 2010 DJ as an impact risk - see above Noted that JPL Sentry has posted 2010 DM as an impact risk - see above Noted that JPL Sentry has posted 2010 DP as an impact risk - see above
2231	Noted that JPL Sentry has posted 2010 CH55 as an impact risk - see above Noted that JPL Sentry has removed 2010 CO44 as an impact risk - see above Noted Radar Astrometry database update - see above
2144	Noted that JPL Sentry has removed 2010 CF19 as an impact risk - see above Grabbed MPEC 2010-D36 - 2010 DC - see above Grabbed MPEC 2010-D37 - 2010 DO - see above Grabbed MPEC 2010-D38 - 2010 DP - see above
2102	Noted that JPL Sentry has removed 2010 CD19 as an impact risk - see above Noted that JPL Sentry has updated its 2010 CK19 risk assessment - see above Noted that NEODyS has updated its 2010 CK19 risk assessment - see above Noted that JPL Sentry has updated its 2010 CQ19 risk assessment - see above Noted that JPL Sentry has updated its 2010 CR5 risk assessment - see above Noted that JPL Sentry has updated its 2010 CS19 risk assessment - see above Grabbed MPEC 2010-D28 - 2010 DF - see above Grabbed MPEC 2010-D29 - 2010 DG - see above Grabbed MPEC 2010-D30 - 2010 DH - see above Grabbed MPEC 2010-D31 - 2010 DJ - see above Grabbed MPEC 2010-D32 - 2010 DK - see above Grabbed MPEC 2010-D33 - 2010 DL - see above Grabbed MPEC 2010-D34 - 2010 DM - see above Grabbed MPEC 2010-D35 - 2010 DN - see above
2012	Noted that NEODyS has removed 2010 CF19 as an impact risk - see above Noted that NEODyS has removed 2010 CO44 as an impact risk - see above Noted that NEODyS has updated its 2010 CQ19 risk assessment - see above Noted that NEODyS has updated its 2010 CR5 risk assessment - see above Noted that NEODyS has updated its 2010 CS19 risk assessment - see above Grabbed MPEC 2010-D18 - 2007 LQ19 - see above Grabbed MPEC 2010-D19 - 2009 NJ - see above Grabbed MPEC 2010-D20 - 2010 CA55 - see above Grabbed MPEC 2010-D21 - 2010 CB55 - see above Grabbed MPEC 2010-D22 - 2010 CC55 - see above Grabbed MPEC 2010-D23 - 2010 CD55 - see above Grabbed MPEC 2010-D24 - 2010 CE55 - see above Grabbed MPEC 2010-D25 - 2010 CF55 - see above Grabbed MPEC 2010-D26 - 2010 CG55 - see above Grabbed MPEC 2010-D27 - 2010 CH55 - see above
1900	Grabbed MPEC 2010-D17 - Daily Orbit Update - see above
1629	Noted that NEODyS has posted 2010 CN44 as an impact risk - see above
1422	Noted that NEODyS has posted 2010 CO44 as an impact risk - see above Noted that NEODyS has posted 2010 DA as an impact risk - see above
0235	Noted that JPL Sentry has posted 2010 DA as an impact risk - see above

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