2008-02-09 Tracking News

Contents on 9 February '08

IAU Minor Planet Center
- NEOCP Activity -- 18 listings: 12 new, 6 updated
- New MPECs -- eleven MPECs
- Observers -- 33 observing facilities
Impact Risk Monitoring -- fourteen 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 9 February '08

The MPC's NEO Confirmation Page has 18 listings: 12 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had twelve new and six updated listings. Of these, fifteen were "one nighters." So far The Tracking News has counted a total of 31 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 9 February '08

Minor Planet Electronic Circulars

As of last check at 2354 UTC, there have been eleven MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-C48 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2008-C49 time-stamped "14:43 UT" - 2008 CX21 - see below
MPEC 2008-C50 time-stamped "14:46 UT" - 2008 CY21 - see below
MPEC 2008-C51 time-stamped "14:49 UT" - 2008 CZ21 - see below
MPEC 2008-C52 time-stamped "14:52 UT" - 2008 CA22 - see below
MPEC 2008-C53 time-stamped "14:55 UT" - 2008 CB22 - see below
MPEC 2008-C54 time-stamped "15:02 UT" - 2008 CC22 - see below
MPEC 2008-C55 time-stamped "15:04 UT" - 2008 CD22 - see below
MPEC 2008-C56 time-stamped "15:22 UT" - 2008 CE22 - see below
MPEC 2008-C57 time-stamped "15:24 UT" - 2008 CF22 - see below
MPEC 2008-C58 time-stamped "17:45 UT" - 2008 CJ22

MPEC 2008-C58 - "17:45 UT" - 2008 CJ22

K08C22J 2008 CJ22 (small asteroid, H=25.5 ~27m) was discovered at 0805 UT on 8 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 8.34-42p8 and 9.33-35p4. The discovery was confirmed by Great Shefford Obs. (Feb. 8.91-94p2).

MPEC 2008-C57 - "15:24 UT" - 2008 CF22

K08C22F 2008 CF22 (risk-listed, Earth MOID=0.0 LD, H=25.9 ~22m) was discovered at 0941 UT on 9 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 9.40-50p23. The discovery was confirmed by La Sagra Obs. (Feb. 9.06-08p4), Grasslands Obs. (Feb. 9.46p3), and Jim Young via Table Mtn. Obs. (Feb. 9.46-47p4). This object is now within ten lunar distances (LD) of Earth, reaching 2.0 LD on 10 Feb.

MPEC 2008-C56 - "15:22 UT" - 2008 CE22

K08C22E 2008 CE22 (risk-listed, Earth MOID=1.1 LD, H=26.4 ~18m) was discovered at 0710 UT on 9 Feb. by the CSS, which observed it at Feb. 9.30-33p4 and 9.40-50p13. The discovery was confirmed by MLS (Feb. 9.33-35p3 & 9.39-41p4), Grasslands Obs. (Feb. 9.42p3), Young/Table Mtn. (Feb. 9.44-45p4), and Bisei Spaceguard Center (Bisei) (Feb. 9.52-53p7). This object is now within ten lunar distances (LD) of Earth, reaching 1.0 LD on 7 Feb.

MPEC 2008-C55 - "15:04 UT" - 2008 CD22

K08C22D 2008 CD22 (risk-listed, H=22.1 ~129m) was discovered at 0526 UT on 9 Feb. by the CSS, which observed it at Feb. 9.23-25p4, 9.30p1, and 9.35p3. The discovery was confirmed by Young/Table Mtn. (Feb. 9.28-29p4) and Grasslands Obs. (Feb. 9.28p3).

MPEC 2008-C54 - "15:02 UT" - 2008 CC22

K08C22C 2008 CC22 (small asteroid, Earth MOID=7.5 LD, H=23.9 ~56m) was discovered at 1009 UT on 8 Feb. by the MLS, which observed it at Feb. 8.37-44p8 and 9.36-39p4. The discovery was confirmed by Gaisberg Obs. (Feb. 8.98-00p3).

MPEC 2008-C53 - "14:55 UT" - 2008 CB22

K08C22B 2008 CB22 (risk-listed, H=19.6 ~407m) was discovered at 1002 UT on 8 Feb. by the CSS, which observed it at Feb. 8.42-44p4, 8.48-49p4, and 8.53p4. The discovery was confirmed by Young/Table Mtn. (Feb. 8.49-51p4), Guidestar Obs. (Feb. 8.97-99p3), Farra d'Isonzo Obs. (Feb. 9.05-07p2), Consell Obs. (Feb. 9.08p5), Vallemare di Borbona Obs. (Feb. 9.10-12p4), Great Shefford Obs. (Feb. 9.20-21p3), and MLS (Feb. 9.48-51p4).

MPEC 2008-C52 - "14:52 UT" - 2008 CA22

K08C22A 2008 CA22 (H=20.7 ~245m) was discovered at 0805 UT on 8 Feb. by the MLS, which observed it at Feb. 8.34-42p8 at V=22.5 and 9.33-35p4. The discovery was confirmed by Gaisberg Obs. (Feb. 9.01-02p2) and the Spacewatch 1.8m telescope (Feb. 9.44-45p3).

MPEC 2008-C51 - "14:49 UT" - 2008 CZ21

K08C21Z 2008 CZ21 (risk-listed, H=20.5 ~269m) was discovered at 0656 UT on 8 Feb. by LINEAR, which observed it at Feb. 8.29-31p3. The discovery was confirmed by Great Shefford Obs. (Feb. 9.15-16p3), Young/Table Mtn. (Feb. 9.18-19p4), and Grasslands Obs. (Feb. 9.22p3).

MPEC 2008-C50 - "14:46 UT" - 2008 CY21

K08C21Y 2008 CY21 (small asteroid, H=24.9 ~35m) was discovered at 0636 UT on 8 Feb. by LINEAR, which observed it at Feb. 8.28-32p5. The discovery was confirmed by Great Shefford Obs. (Feb. 9.14-15p3), Young/Table Mtn. (Feb. 9.16-17p4), and Grasslands Obs. (Feb. 9.21p3).

MPEC 2008-C49 - "14:43 UT" - 2008 CX21

K08C21X 2008 CX21 (small asteroid, H=24.5 ~43m) was discovered at 0647 UT on 7 Feb. by LINEAR, which observed it at Feb. 7.28-33p5 and 8.33-37p4. The discovery was confirmed by Great Shefford Obs. (Feb. 9.10p3), Grasslands Obs. (Feb. 9.24p4), and Young/Table Mtn. (Feb. 9.30-31p3).

<< DOU on 9 Feb. '08 >> MPEC 2008-C48 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08C05A 2008 CA5 (arc=3 days, H=19.8 ~371m) from Suno Obs. (Feb. 9.13-14p2)
K08C01S 2008 CS1 (arc=5 days, H=20.2 ~309m) from Young/Table Mtn. (Feb. 8.47-49p4) and Spacewatch 1.8m (Feb. 8.52-53p2)
K08C00J 2008 CJ (small asteroid, arc=1 day, H=27.4 ~11m) from Astronomical Research Obs. (ARO) (Feb. 3.29-30p3)
K08B16O 2008 BO16 (small asteroid, Q=4.395 AU, arc=9 days, H=22.9 ~89m) from ARO (Feb. 3.34-35p4) and Spacewatch 1.8m (Feb. 8.29-31p3)
K08B16N 2008 BN16 (small asteroid, arc=4 days, H=26.0 ~21m) from ARO (Feb. 3.24-28p3 at V=22.2-4)
K08A04F 2008 AF4 (arc=29 days, H=19.7 ~389m) from Green Island Obs. (Feb. 7.79p1 & 7.88p1), Spacewatch 1.8m (Feb. 8.23-24p3), Stia Obs. (Feb. 8.79-80p3), Guidestar Obs. (Feb. 8.84-88p3), and Consell Obs. (Feb. 8.89-90p6)
Observations of recently (no longer) risk-listed objects
K08B18T 2008 BT18 (arc=9 days, H=18.5 ~676m) from ARO (Feb. 3.32-33p4), Stia Obs. (Feb. 8.83-85p3), and Consell Obs. (Feb. 9.00-01p4)
K08B15E 2008 BE15 (small asteroid, Q=4.151 AU, arc=4 days, H=24.8 ~37m) from ARO (Feb. 3.34-35p5)
K08B15D 2008 BD15 (arc=9 days, H=20.6 ~257m) from Stia Obs. (Feb. 8.75-76p4) and Eschenberg Obs. (Feb. 8.76-77p3)
Observations of small asteroids (H>22.0)
K08C20L 2008 CL20 (arc=1 day, H=25.1 ~32m) from Guidestar Obs. (Feb. 8.89-90p3) and Great Shefford Obs. (Feb. 8.99p3)
K08C04Z 2008 CZ4 (arc=3 days, H=25.0 ~34m) from Young/Table Mtn. (Feb. 8.38-41p4) and KLENOT (Feb. 8.84p6)
K08C04Y 2008 CY4 (arc=2 days, H=22.4 ~112m) from LINEAR (Feb. 8.28-32p5)
K08C00P 2008 CP (arc=7 days, H=24.0 ~54m) from Verona Obs. (Feb. 7.92p4), MLS (Feb. 8.32-33p4), KLENOT (Feb. 8.86p6), and Madonna di Dossobuono Obs. (Feb. 8.95p3)
K08C00O 2008 CO (arc=7 days, H=22.8 ~93m) from KLENOT (Feb. 8.84-85p6)
K08C00G 2008 CG (arc=7 days, H=22.1 ~129m) from ARO (Feb. 3.35p3), MLS (Feb. 8.37-39p4), and Stia Obs. (Feb. 8.81-82p3)
K08B02X 2008 BX2 (arc=19 days, H=23.6 ~65m) from Spacewatch 1.8m (Feb. 8.14-15p3)
K08B02T 2008 BT2 (arc=21 days, H=24.3 ~47m) from ARO (Feb. 3.19p1 & 3.24-26p2) and Spacewatch 1.8m (Feb. 8.11-13p3 at V=22.3-5)
K08A33P 2008 AP33 (arc=19 days, H=23.9 ~56m) from ARO (Feb. 3.11-14p3 at V=22.1-4)
Observations of almost-small asteroids (21.7<H<=22.0)
K08C01H 2008 CH1 (arc=6 days, H=21.8 ~148m) from Spacewatch 1.8m (Feb. 8.21-22p3)
Observations of other objects
K08C05E 2008 CE5 (q=0.341 AU, arc=2 days, H=20.4 ~282m) from MLS (Feb. 8.32-33p4) and KLENOT (Feb. 8.85-86p5)
K08C01Q 2008 CQ1 (arc=28 days, H=19.4 ~446m) from Spacewatch 1.8m (Feb. 8.18-19p3)
K08C01N 2008 CN1 (arc=7 days, H=20.7 ~245m) from Verona Obs. (Feb. 8.99-00p4)
K08B16P 2008 BP16 (q=0.291 AU, arc=9 days, H=21.6 ~162m) from CSS (Feb. 8.34-36p3) and LINEAR (Feb. 8.34-37p3)
K08B16H 2008 BH16 (arc=9 days, H=20.6 ~257m) from ARO (Feb. 3.30p4) and CSS (Feb. 8.25-26p3)
K08A33J 2008 AJ33 (Q=5.420 AU, arc=20 days, H=20.0 ~339m) from ARO (Feb. 3.09-12p4)
K08A00E 2008 AE (arc=2 opp, H=19.6 ~407m) from LINEAR (Feb. 8.34-39p5)
K07X16J 2007 XJ16 (arc=60 days, H=18.9 ~562m) from ARO (Feb. 3.14-18p3 at V=22.4-8)
K07VI4G 2007 VG184 (arc=87 days, H=17.4 ~1.12 km) from ARO (Feb. 3.06-08p3)
K07T24U 2007 TU24 (arc=120 days, H=20.6 ~257m) from Ondrejov Obs. (Feb. 3.05-21p9), Taunus Obs. (Feb. 7.88-89p3), and Hamamatsu-Yuto Obs. (Feb. 8.68-70p9)
K07T19A 2007 TA19 (arc=123 days, H=19.6 ~407m) from Spacewatch 1.8m (Feb. 9.12-13p3)
K07T08G 2007 TG8 (Q=4.305 AU, arc=148 days, H=18.6 ~645m) from Hamamatsu-Yuto Obs. (Feb. 8.75p3)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from Green Island Obs. (Feb. 7.77p1 & 7.85p3)
K06D62U 2006 DU62 (arc=3 opp, H=18.1 ~812m) from Great Shefford Obs. (Feb. 9.20p3)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from Green Island Obs. (Feb. 7.78p1 & 7.86p1), CSS (Feb. 8.28p2), Hamamatsu-Yuto Obs. (Feb. 8.46-49p5), and Chiusa di Pesio Obs. (Feb. 8.74-80p9)
K05S00F 2005 SF (arc=2 opp, H=19.0 ~537m) from LINEAR (Feb. 8.40-45p4)
K04H01M 2004 HM1 (Q=4.234 AU, arc=4 opp, H=16.6 ~1.62 km) from Spacewatch 1.8m (Feb. 8.35-37p3 at V=23)
K04H00W 2004 HW (Q=4.401 AU, arc=3 opp, H=17.2 ~1.23 km) from the Spacewatch 0.9m telescope (Feb. 8.24-27p3)
K04F17M 2004 FM17 (arc=2 opp, H=19.3 ~467m) from Spacewatch 1.8m (Feb. 9.11p3)
K03C17N 2003 CN17 (arc=2 opp, H=19.2 ~490m) from Desert Moon Obs. (Feb. 8.53p2)
K03B47M 2003 BM47 (arc=4 opp, H=20.2 ~309m) from MLS (Feb. 8.37-39p4)
K03A18K 2003 AK18 (arc=3 opp, H=19.7 ~389m) from Desert Moon Obs. (Feb. 8.51-52p3)
K02RB8C 2002 RC118 (Q=4.624 AU, arc=2 opp, H=16.7 ~1.55 km) from the Siding Spring Survey (SSS) (Feb. 8.50-54p4)
K02A31V 2002 AV31 (arc=3 opp, H=20.5 ~269m) from LINEAR (Feb. 8.27-32p4)
K01B16E 2001 BE16 (i=39.4°, arc=2 opp, H=19.8 ~371m) from KLENOT (Feb. 8.83p3)
K00C59H 2000 CH59 (arc=3 opp, H=19.9 ~355m) from Drebach Obs. (Feb. 8.78-79p3)
K00C59G 2000 CG59 (arc=5 opp, H=17.6 ~1.02 km) from MLS (Feb. 8.43-45p4)
J89A00Z 1989 AZ (arc=3 opp, H=19.6 ~407m) from Drebach Obs. (Feb. 8.77p2)
H3689 173689 2001 PK9 from SSS (Feb. 8.65-68p3)
H3561 173561 2000 YV137 from CSS (Feb. 8.21-23p4)
H0891 170891 2004 TY16 from Mt. Tuffley Obs. (Feb. 8.87-88p3)
F4347 154347 2002 XK4 from LINEAR (Feb. 8.22-27p5)
F3591 153591 2001 SN263 from LINEAR (Feb. 8.16-20p3) and Stammersdorf Obs. (Feb. 8.88-90p6)
E4922 144922 2005 CK38 from LINEAR (Feb. 8.27-32p5)
40267 40267 1999 GJ4 from CSS (Feb. 8.34-36p3) and LINEAR (Feb. 8.34-39p5)
04954 4954 Eric (1990 SQ) from Mt. Tuffley Obs. (Feb. 8.86-87p3)
04450 4450 Pan (1987 SY) from Saint-Barthelemy Obs. (Feb. 8.79-82p4)
01866 1866 Sisyphus (1972 XA) from CSS (Feb. 8.42-44p4)
01620 1620 Geographos (1951 RA) from LINEAR (Feb. 8.33-38p5)
01036 1036 Ganymed (1924 TD) from Mt. Tuffley Obs. (Feb. 8.84-85p3)

Observers on 9 February '08

A total of 33 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 12 in MPEC 2008-C48 -- 2008 CJ, 2008 CG, 2008 BT2, 2008 BT18, 2008 BO16, 2008 BN16, 2008 BH16, 2008 BE15, 2008 AP33, 2008 AJ33, 2007 XJ16, 2007 VG184
`300`	Bisei Spaceguard Center in Japan, 1 in MPEC 2008-C56 -- 2008 CE22
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-C48, 2008-C53, 2008-C55, 2008-C56 & 2008-C57 -- 2008 CF22, 2008 CE22, 2008 CD22, 2008 CB22, 2008 BP16, 2008 BH16, 2005 TU45, 40267, 173561, 1866
`A67`	Chiusa di Pesio Obs., 1 in MPEC 2008-C48 -- 2005 TU45
`176`	Consell Obs. in Spain, 3 in MPECs 2008-C48 & 2008-C53 -- 2008 CB22, 2008 BT18, 2008 AF4
`448`	Desert Moon Obs. in New Mexico, 2 in MPEC 2008-C48 -- 2003 CN17, 2003 AK18
`113`	Drebach Obs. in Germany, 2 in MPEC 2008-C48 -- 2000 CH59, 1989 AZ
`151`	Eschenberg Obs. in Switzerland, 1 in MPEC 2008-C48 -- 2008 BD15
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-C53 -- 2008 CB22
`B21`	Gaisberg Obs. in Austria, 2 in MPECs 2008-C52 & 2008-C54 -- 2008 CC22, 2008 CA22
`651`	Grasslands Obs. in Arizona, 6 in MPECs 2008-C49, 2008-C50, 2008-C51, 2008-C55, 2008-C56 & 2008-C57 -- 2008 CZ21, 2008 CY21, 2008 CX21, 2008 CF22, 2008 CE22, 2008 CD22
`J95`	Great Shefford Obs. in England, 7 in MPECs 2008-C48, 2008-C49, 2008-C50, 2008-C51, 2008-C53 & 2008-C58 -- 2008 CZ21, 2008 CY21, 2008 CX21, 2008 CL20, 2008 CJ22, 2008 CB22, 2006 DU62
`B34`	Green Island Obs. in Cyprus, 3 in MPEC 2008-C48 -- 2008 AF4, 2007 PU11, 2005 TU45
`A17`	Guidestar Obs. in Germany, 3 in MPECs 2008-C48 & 2008-C53 -- 2008 CL20, 2008 CB22, 2008 AF4
`379`	Hamamatsu-Yuto Obs. in Japan, 3 in MPEC 2008-C48 -- 2007 TU24, 2007 TG8, 2005 TU45
`246`	KLENOT in the Czech Republic, 5 in MPEC 2008-C48 -- 2008 CZ4, 2008 CP, 2008 CO, 2008 CE5, 2001 BE16
`704`	LINEAR in New Mexico, 13 in MPECs 2008-C48, 2008-C49, 2008-C50 & 2008-C51 -- 2008 CZ21, 2008 CY4, 2008 CY21, 2008 CX21, 2008 BP16, 2008 AE, 2005 SF, 2002 AV31, 40267, 154347, 153591, 144922, 1620
`J75`	La Sagra Obs. in Spain, 1 in MPEC 2008-C57 -- 2008 CF22
`560`	Madonna di Dossobuono Obs. in Italy, 1 in MPEC 2008-C48 -- 2008 CP
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-C48, 2008-C52, 2008-C53, 2008-C54, 2008-C56 & 2008-C58 -- 2008 CP, 2008 CJ22, 2008 CG, 2008 CE5, 2008 CE22, 2008 CC22, 2008 CB22, 2008 CA22, 2003 BM47, 2000 CG59
`J93`	Mt. Tuffley Obs. in England, 3 in MPEC 2008-C48 -- 170891, 4954, 1036
`557`	Ondrejov Obs. in the Czech Republic, 1 in MPEC 2008-C48 -- 2007 TU24
`B04`	Saint-Barthelemy Obs. in Italy, 1 in MPEC 2008-C48 -- 4450
`E12`	Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-C48 -- 2002 RC118, 173689
`691`	Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-C48 -- 2004 HW
`291`	Spacewatch 1.8m telescope in Arizona, 11 in MPECs 2008-C48 & 2008-C52 -- 2008 CS1, 2008 CQ1, 2008 CH1, 2008 CA22, 2008 BX2, 2008 BT2, 2008 BO16, 2008 AF4, 2007 TA19, 2004 HM1, 2004 FM17
`A97`	Stammersdorf Obs. in Austria, 1 in MPEC 2008-C48 -- 153591
`A78`	Stia Obs. in Italy, 4 in MPEC 2008-C48 -- 2008 CG, 2008 BT18, 2008 BD15, 2008 AF4
`147`	Suno Obs. in Italy, 1 in MPEC 2008-C48 -- 2008 CA5
`6735`	Jim Young via Table Mtn. Obs. in southern California, 9 in MPECs 2008-C48, 2008-C49, 2008-C50, 2008-C51, 2008-C53, 2008-C55, 2008-C56 & 2008-C57 -- 2008 CZ4, 2008 CZ21, 2008 CY21, 2008 CX21, 2008 CS1, 2008 CF22, 2008 CE22, 2008 CD22, 2008 CB22
`B01`	Taunus Obs. in Germany, 1 in MPEC 2008-C48 -- 2007 TU24
`A55`	Vallemare di Borbona Obs. in Italy, 1 in MPEC 2008-C53 -- 2008 CB22
`A48`	Verona Obs. in Italy, 2 in MPEC 2008-C48 -- 2008 CP, 2008 CN1

Impact Risk Monitoring on 9 February '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2354 UTC)
See the CRT page for a list of all objects rated recently as risks and our ephemerides page for a list of 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

2008 CF22	JPL Sentry	1901	2028-2052	5	9.0e-05	-4.19	-4.58	0	JPL: "Analysis based on 33 observations spanning .43319 days (2008-Feb-09.06346 to 2008-Feb-09.49665)." Diameter approximately 0.022 km. from mean, weighted H=26.0.

2008 CE22	JPL Sentry	1939	2104	1	2.1e-07	-7.74	-7.74	0	JPL: "Analysis based on 38 observations spanning .23078 days (2008-Feb-09.29929 to 2008-Feb-09.53007)." Diameter approximately 0.018 km. from mean, weighted H=26.4.

2008 CD22	JPL Sentry	1827	2015-2106	53	2.7e-08	-6.16	-7.23	0	JPL: "Analysis based on 15 observations spanning .12716 days (2008-Feb-09.22668 to 2008-Feb-09.35384)." Diameter approximately 0.130 km. from mean, weighted H=22.1.

2008 CB22	JPL Sentry	1939	2100	1	3.2e-09	-6.10	-6.10	0	JPL: "Analysis based on 37 observations spanning 1.0890 days (2008-Feb-08.41828 to 2008-Feb-09.50727)." Diameter approximately 0.420 km. from mean, weighted H=19.5.

2008 CZ21	JPL Sentry	1805	2010-2107	112	5.1e-08	-4.36	-4.73	0	JPL: "Analysis based on 13 observations spanning .93493 days (2008-Feb-08.2891 to 2008-Feb-09.22403)." Diameter approximately 0.300 km. from mean, weighted H=20.3.

2008 CM20	JPL Sentry	1827	2008-2084	26	6.0e-08	-3.63	-3.64	0	JPL: "Analysis based on 21 observations spanning .65199 days (2008-Feb-08.1746 to 2008-Feb-08.82659)." Diameter approximately 0.210 km. from mean, weighted H=21.1.
2008 CM20	NEODyS	1805	2008-2084	3	1.96e-08	-5.49	-5.76	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/02/08.175 to 2008/02/08.827."

2008 CD6	NEODyS	2330	2012-2090	181	1.72e-06	-4.84	-5.39	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/07.318 to 2008/02/08.331."

2008 CB6	NEODyS	1805	2035-2089	41	9.99e-06	-5.99	-6.18	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/07.293 to 2008/02/08.330."

2008 CA5	JPL Sentry	1558	R E M O V E D						JPL: Risk listing removed at 1158 UTC.
2008 CA5	NEODyS	1558	R E M O V E D

2008 CS1	NEODyS	1559	2044-2090	17	1.5e-06	-3.33	-3.85	0	NEODyS: "Based on 27 optical observations (of which 2 are rejected as outliers) from 2008/02/03.503 to 2008/02/08.531."
2008 CS1	JPL Sentry	1558	2044-2107	23	1.8e-06	-3.28	-3.83	0	JPL: "Analysis based on 25 observations spanning 5.0282 days (2008-Feb-03.50178 to 2008-Feb-08.52998)." Diameter approximately 0.300 km. from mean, weighted H=20.3.

2008 CJ	JPL Sentry	1558	2033-2106	3	8.3e-07	-7.59	-7.60	0	JPL: "Analysis based on 13 observations spanning 1.0540 days (2008-Feb-02.24586 to 2008-Feb-03.299901)." Diameter approximately 0.012 km. from mean, weighted H=27.3.
2008 CJ	NEODyS	1558	R E M O V E D

2008 BO16	NEODyS	1559	2045	1	3.28e-06	-3.97	-3.97	0	NEODyS: "Based on 43 optical observations (of which 2 are rejected as outliers) from 2008/01/30.382 to 2008/02/08.309."
2008 BO16	JPL Sentry	1558	2045	1	2.8e-06	-4.03	-4.03	0	JPL: "Analysis based on 42 observations spanning 8.9272 days (2008-Jan-30.38083 to 2008-Feb-08.30803)." Diameter approximately 0.088 km. from mean, weighted H=22.9.

2008 BN16	NEODyS	1559	2067-2086	7	3.19e-07	-6.90	-7.19	0	NEODyS: "Based on 20 optical observations (of which 0 are rejected as outliers) from 2008/01/30.248 to 2008/02/03.279."
2008 BN16	JPL Sentry	1558	2067-2086	5	2.6e-07	-6.98	-7.18	0	JPL: "Analysis based on 20 observations spanning 4.0304 days (2008-Jan-30.24765 to 2008-Feb-03.27809)." Diameter approximately 0.022 km. from mean, weighted H=25.9.

2008 AF4	NEODyS	1559	2067-2090	16	1.05e-05	-2.65	-2.77	0	NEODyS: "Based on 430 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/08.897."
2008 AF4	JPL Sentry	1558	2078-2100	33	2.2e-05	-2.36	-2.77	0	JPL: "Analysis based on 426 observations spanning 29.500 days (2008-Jan-10.39652 to 2008-Feb-08.89639)." Diameter approximately 0.390 km. from mean, weighted H=19.7.

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 9 February '08

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

2330	Noted that NEODyS has posted 2008 CD6 as an impact risk - see above
1939	Noted that JPL Sentry has posted 2008 CB22 as an impact risk - see above Noted that JPL Sentry has posted 2008 CE22 as an impact risk - see above
1901	Noted that JPL Sentry has posted 2008 CF22 as an impact risk - see above
1827	Noted that JPL Sentry has posted 2008 CD22 as an impact risk - see above Noted that JPL Sentry has posted 2008 CM20 as an impact risk - see above
1805	Noted that NEODyS has posted 2008 CB6 as an impact risk - see above Noted that NEODyS has posted 2008 CM20 as an impact risk - see above Noted that JPL Sentry has posted 2008 CZ21 as an impact risk - see above
1804	Grabbed MPEC 2008-C58 - 2008 CJ22 - see above
1559	Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 BN16 risk assessment - see above Noted that NEODyS has updated its 2008 BO16 risk assessment - see above Noted that NEODyS has updated its 2008 CS1 risk assessment - see above
1558	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 BN16 risk assessment - see above Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above Noted that JPL Sentry has removed 2008 CA5 as an impact risk - see above Noted that NEODyS has removed 2008 CA5 as an impact risk - see above Noted that JPL Sentry has updated its 2008 CJ risk assessment - see above Noted that NEODyS has removed 2008 CJ as an impact risk - see above Noted that JPL Sentry has updated its 2008 CS1 risk assessment - see above Grabbed MPEC 2008-C48 - Daily Orbit Update - see above Grabbed MPEC 2008-C49 - 2008 CX21 - see above Grabbed MPEC 2008-C50 - 2008 CY21 - see above Grabbed MPEC 2008-C51 - 2008 CZ21 - see above Grabbed MPEC 2008-C52 - 2008 CA22 - see above Grabbed MPEC 2008-C53 - 2008 CB22 - see above Grabbed MPEC 2008-C54 - 2008 CC22 - see above Grabbed MPEC 2008-C55 - 2008 CD22 - see above Grabbed MPEC 2008-C56 - 2008 CE22 - see above Grabbed MPEC 2008-C57 - 2008 CF22 - see above

http://www.HohmannTransfer.com/mn/08/08040_0209.htm
Publisher information, privacy statement, and disclaimer.
This page is © Copyright 2008 Columbine, Inc. - All Rights Reserved
Any mentioned trademarks are the property of their respective owners.
Various tabular formats and data used on this page are acknowledged as belonging to JPL, MPC, NEODyS, and/or others.
Do NOT copy, mirror, or embed this page, but you are welcome to link to it, and you may embed the RSS news feed. All information here is subject to very frequent change during the day of news compilation. Individuals may make copies for their own private, non-commercial use. Please report broken links or other problems with this page to <webmaster@hohmanntransfer.com> (HTML 4.01 validation).
Important news updates are flagged by A/CC's RSS news feed (link).