2008-02-08 Tracking News

Contents on 8 February '08

IAU Minor Planet Center
- NEOCP Activity -- nine listings: 3 new, 6 updated
- New MPECs -- nine MPECs
- Observers -- 28 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 8 February '08

The MPC's NEO Confirmation Page has 9 listings: 3 new, 6 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and six updated listings. All of these were "one nighters." So far The Tracking News has counted a total of 25 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 8 February '08

Minor Planet Electronic Circulars

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

MPEC 2008-C39 time-stamped "00:55 UT" - 2008 CE5 - see below
MPEC 2008-C40 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2008-C41 time-stamped "16:51 UT" - 2008 CA6 - see below
MPEC 2008-C42 time-stamped "16:57 UT" - 2008 CB6 - see below
MPEC 2008-C43 time-stamped "17:00 UT" - 2008 CC6 - see below
MPEC 2008-C44 time-stamped "17:03 UT" - 2008 CD6 - see below
MPEC 2008-C45 time-stamped "17:09 UT" - 2008 CE6 - see below
MPEC 2008-C46 time-stamped "19:29 UT" - 2008 CL20 - see below
MPEC 2008-C47 time-stamped "20:50 UT" - 2008 CM20

MPEC 2008-C47 - "20:50 UT" - 2008 CM20

K08C20M 2008 CM20 (H=21.0 ~214m) was discovered at 0411 UT on 8 Feb. by the Mt. Lemmon Survey (MLS), which observed it at Feb. 8.17-19p4 and 8.24-27p3. The discovery was confirmed by Gnosca Obs. (Feb. 8.76-79p2), Great Shefford Obs. (Feb. 8.78-79p3), Guidestar Obs. (Feb. 8.79-83p3), and KLENOT (Feb. 8.81p6).

MPEC 2008-C46 - "19:29 UT" - 2008 CL20

K08C20L 2008 CL20 (small asteroid, Earth MOID=6.4 LD, H=25.1 ~32m) was discovered at 0810 UT on 8 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 8.34-36p3, 8.41p4, and 8.52-53p4. The discovery was confirmed by Jim Young via Table Mtn. Obs. (Feb. 8.45-47p4). This object will be coming within ten lunar distances (LD) of Earth, reaching 6.0 LD on 12 Feb.

MPEC 2008-C45 - "17:09 UT" - 2008 CE6

K08C06E 2008 CE6 (risk-listed, Earth MOID=4.9 LD, H=23.4 ~71m) was discovered at 1120 UT on 7 Feb. by the MLS, which observed it at Feb. 7.47-52p7 and 8.43-45p4. The discovery was confirmed by the Spacewatch 1.8m telescope (Feb. 7.43-44p3 & 8.40-44p3).

MPEC 2008-C44 - "17:03 UT" - 2008 CD6

K08C06D 2008 CD6 (risk-listed, Earth MOID=1.6 LD, H=23.6 ~65m) was discovered at 0911 UT on 7 Feb. by the MLS, which observed it at Feb. 7.32-34p4, 7.38-41p4, and 8.32-33p4. The discovery was confirmed by Spacewatch 1.8m (Feb. 8.20-21p3).

MPEC 2008-C43 - "17:00 UT" - 2008 CC6

K08C06C 2008 CC6 (small asteroid, q=0.281 AU, Earth MOID=8.0 LD, H=22.1 ~129m) was discovered at 0857 UT on 7 Feb. by the Spacewatch 0.9m telescope, which observed it at Feb. 7.37-41p3. The discovery was confirmed by Mt. John Obs. (Feb. 7.59p4), Spacewatch 1.8m (Feb. 8.32-33p3), and MLS (Feb. 8.40-42p3).

MPEC 2008-C42 - "16:57 UT" - 2008 CB6

K08C06B 2008 CB6 (risk-listed, Earth MOID=1.0 LD, H=26.8 ~15m) was discovered at 0700 UT on 7 Feb. by the MLS, which observed it at Feb. 7.29-37p8 and 8.32-33p4. The discovery was confirmed by Spacewatch 1.8m (Feb. 8.17p3). This object will be coming within ten lunar distances (LD) of Earth, reaching 4.7 LD on 17 Feb.

MPEC 2008-C41 - "16:51 UT" - 2008 CA6

K08C06A 2008 CA6 (H=20.7 ~245m) was discovered at 0330 UT on 7 Feb. by the Spacewatch 0.9m, which observed it at Jan. 1.36-40p3 and Feb. 7.15-17p3. The discovery was confirmed by Grasslands Obs. (Feb. 7.29-30p3), Spacewatch 1.8m (Feb. 8.09-10p3), and MLS (Feb. 8.25-27p3).

<< DOU on 8 Feb. '08 >> MPEC 2008-C40 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08C05A 2008 CA5 (arc=1 day, H=19.8 ~371m) from Mt. John Obs. (Feb. 7.66-67p4)
K08C01S 2008 CS1 (arc=4 days, H=20.2 ~309m) from Spacewatch 1.8m (Feb. 7.49-50p2) and Young/Table Mtn. (Feb. 7.50-52p4)
K08B16O 2008 BO16 (small asteroid, Q=4.428 AU, arc=8 days, H=22.9 ~89m) from Spacewatch 0.9m (Feb. 7.25-29p3) and Spacewatch 1.8m (Feb. 7.27-28p2)
K08A04F 2008 AF4 (arc=28 days, H=19.7 ~389m) from Petit Jean Mtn. South Obs. (PJMSO) (Feb. 7.39-40p5) and Hamamatsu-Yuto Obs. (Feb. 7.67-72p6)
Observations of recently (no longer) risk-listed objects
K08B18T 2008 BT18 (arc=7 days, H=18.4 ~708m) from Eschenberg Obs. (Feb. 7.88-89p3)
K08B15D 2008 BD15 (arc=8 days, H=20.6 ~257m) from PJMSO (Feb. 7.37p6) and Eschenberg Obs. (Feb. 7.77p3)
K08A33G 2008 AG33 (arc=26 days, H=19.3 ~467m) from Spacewatch 1.8m (Feb. 7.53-54p3)
Observations of small asteroids (H>22.0)
K08C04Z 2008 CZ4 (arc=1 day, H=25.0 ~34m) from LINEAR (Feb. 7.21-26p8)
K08C04Y 2008 CY4 (arc=1 day, H=22.4 ~112m) from LINEAR (Feb. 7.27-33p10)
K08C00Q 2008 CQ (arc=5 days, H=25.4 ~28m) from LINEAR (Feb. 7.27-33p9)
K08C00P 2008 CP (arc=5 days, H=24.0 ~54m) from PJMSO (Feb. 7.36p7)
K08C00G 2008 CG (arc=6 days, H=22.1 ~129m) from LINEAR (Feb. 7.33-38p5)
K08C00F 2008 CF (arc=6 days, H=26.5 ~17m) from Spacewatch 1.8m (Feb. 7.26-27p3)
K08B00E 2008 BE (arc=21 days, H=22.9 ~89m) from Desert Moon Obs. (Feb. 7.41-46p3)
K07P09S 2007 PS9 (arc=179 days, H=23.6 ~65m) from MLS (Feb. 7.29-31p7) and PJMSO (Feb. 7.33-35p5)
Observations of other objects
K08C01R 2008 CR1 (i=46.2°, arc=4 days, H=19.5 ~426m) from Desert Moon Obs. (Feb. 7.34-37p3)
K08C00M 2008 CM (arc=6 days, H=17.0 ~1.35 km) from Naef Obs. (Feb. 7.79-83p3)
K08C00H 2008 CH (Q=4.488 AU, arc=6 days, H=20.4 ~282m) from Spacewatch 1.8m (Feb. 7.42-43p2) and Young/Table Mtn. (Feb. 7.47-48p2)
K08B16Q 2008 BQ16 (arc=8 days, H=19.3 ~467m) from Mt. John Obs. (Feb. 7.61p3)
K08B16H 2008 BH16 (arc=8 days, H=20.7 ~245m) from PJMSO (Feb. 7.38p6)
K08B02S 2008 BS2 (arc=20 days, H=18.2 ~776m) from Spacewatch 0.9m (Feb. 7.15-18p3)
K08A28V 2008 AV28 (arc=50 days, H=19.6 ~407m) from Desert Moon Obs. (Feb. 7.26-31p3)
K08A26U 2008 AU26 (arc=39 days, H=21.0 ~214m) from MLS (Feb. 7.38-41p3)
K07Y02B 2007 YB2 (Q=5.225 AU, arc=51 days, H=18.4 ~708m) from CSS (Feb. 7.50-52p4)
K07Y01F 2007 YF1 (Q=4.002 AU, arc=53 days, H=18.7 ~616m) from Spacewatch 0.9m (Feb. 7.15-18p3) and Desert Moon Obs. (Feb. 7.15-22p3)
K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from LINEAR (Feb. 7.28-33p5) and PJMSO (Feb. 7.40-41p5)
K07VD8C 2007 VC138 (arc=90 days, H=19.3 ~467m) from Mt. John Obs. (Feb. 7.53-55p4)
K07V07Y 2007 VY7 (arc=3 opp, H=19.6 ~407m) from Spacewatch 0.9m (Feb. 7.51-53p3)
K07T24U 2007 TU24 (arc=120 days, H=20.6 ~257m) from University Hills Obs. (Feb. 7.40-41p6) and Hamamatsu-Yuto Obs. (Feb. 7.78-80p10)
K07T08G 2007 TG8 (Q=4.305 AU, arc=147 days, H=18.6 ~645m) from University Hills Obs. (Feb. 7.38-39p6) and Hamamatsu-Yuto Obs. (Feb. 7.73-77p5)
K07P11U 2007 PU11 (Q=4.384 AU, arc=3 opp, H=16.3 ~1.86 km) from CSS (Feb. 7.21-23p4)
K05X01D 2005 XD1 (arc=2 opp, H=19.4 ~446m) from CSS (Feb. 7.20-22p4)
K05T45U 2005 TU45 (arc=3 opp, H=17.1 ~1.29 km) from PJMSO (Feb. 7.29-30p6), Hamamatsu-Yuto Obs. (Feb. 7.50-59p7), and Trieste Obs. (Feb. 7.93-94p5)
K05O03E 2005 OE3 (arc=2 opp, H=20.3 ~295m) from Spacewatch 0.9m (Feb. 7.21-24p3)
K05E70K 2005 EK70 (arc=4 opp, H=17.5 ~1.07 km) from North Obs. (Feb. 6.88p5)
K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from Purple Mtn. Obs. XuYi Station (Feb. 6.78-82p4) and LINEAR (Feb. 7.34-39p5)
K05A19N 2005 AN19 (i=39.8°, arc=3 opp, H=18.0 ~851m) from Spacewatch 1.8m (Feb. 7.50-51p3)
K04S19Z 2004 SZ19 (arc=3 opp, H=18.8 ~589m) from Spacewatch 1.8m (Feb. 7.29p1)
K04A01R 2004 AR1 (arc=3 opp, H=19.8 ~371m) from LINEAR (Feb. 7.27-32p5)
K03W25C 2003 WC25 (arc=6 opp, H=16.8 ~1.48 km) from Spacewatch 0.9m (Feb. 7.25-29p3)
K02S41S 2002 SS41 (i=63.7°, arc=3 opp, H=17.1 ~1.29 km) from Spacewatch 1.8m (Feb. 7.52-53p3)
K02C26F 2002 CF26 (arc=5 opp, H=17.1 ~1.29 km) from Purple Mtn. Obs. XuYi Station (Feb. 6.83-88p4)
K01V05K 2001 VK5 (arc=4 opp, H=17.8 ~933m) from Cima Rest Obs. (Feb. 7.06-07p2)
K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from Purple Mtn. Obs. XuYi Station (Feb. 6.84-88p4)
K00C59H 2000 CH59 (arc=3 opp, H=19.8 ~371m) from Herrenberg Obs. (Feb. 7.86p4)
J97X11V 1997 XV11 (i=44.3°, arc=2 opp, H=18.4 ~708m) from Spacewatch 1.8m (Feb. 7.11-13p3 at V=22.7)
J96A01J 1996 AJ1 (q=0.286 AU, arc=3 opp, H=20.2 ~309m) from Spacewatch 0.9m (Feb. 7.14-16p2)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from PJMSO (Feb. 7.32-33p5)
H5189 175189 2005 EC224 from MLS (Feb. 7.32-34p4)
H4806 174806 2003 XL from LINEAR (Feb. 7.11-15p4) and Herrenberg Obs. (Feb. 7.76-79p3)
H0891 170891 2004 TY16 from LINEAR (Feb. 7.22-27p5) and PJMSO (Feb. 7.30-31p5)
F4347 154347 2002 XK4 from PJMSO (Feb. 7.35-36p5) and CAST Obs. (Feb. 7.86p1)
F3591 153591 2001 SN263 from Balzaretto Obs. (Feb. 7.83-84p5)
E4922 144922 2005 CK38 from LINEAR (Feb. 7.28-33p5)
86324 86324 1999 WA2 from LINEAR (Feb. 7.15-20p5)
86067 86067 1999 RM28 from MLS (Feb. 7.48-50p4)
85804 85804 1998 WQ5 from LINEAR (Feb. 7.10-15p5) and CSS (Feb. 7.16-19p4)
85628 85628 1998 KV2 from CSS (Feb. 7.53-55p4)
68359 68359 2001 OZ13 from LINEAR (Feb. 7.16-21p5)
53319 53319 1999 JM8 from LINEAR (Feb. 7.46-50p3)
39565 39565 1992 SL from LINEAR (Feb. 7.28-31p3)
39557 39557 Gielgud (1992 JG) from MLS (Feb. 7.26-28p4 at V=22.1-5)
35107 35107 1991 VH from LINEAR (Feb. 7.46-51p5) and CSS (Feb. 7.50-52p4)
22099 22099 2000 EX106 from Spacewatch 0.9m (Feb. 7.31-34p3) and PJMSO (Feb. 7.41-42p5)
11398 11398 1998 YP11 from Spacewatch 0.9m (Feb. 7.39-41p2)
04450 4450 Pan (1987 SY) from Huelva Obs. (Feb. 5.94-98p3 & 6.92-95p3) and CSS (Feb. 7.27-28p3)
03752 3752 Camillo (1985 PA) from CSS (Feb. 7.47-49p2)
03288 3288 Seleucus (1982 DV) from Cesson Obs. (Feb. 6.89-93p3)

MPEC 2008-C39 - "00:55 UT" - 2008 CE5

K08C05E 2008 CE5 (q=0.334 AU, H=20.3 ~295m) was discovered at 0624 UT on 7 Feb. by the CSS, which observed it at Feb. 7.27-29p4 and 7.43p2. The discovery was confirmed by Drebach Obs. (Feb. 7.84-85p3).

Observers on 8 February '08

A total of 28 observing facilities appear in today's MPECs.

Code	Observer / observatory
`A81`	Balzaretto Obs. in Italy, 1 in MPEC 2008-C40 -- 153591
`235`	CAST Obs. in Italy, 1 in MPEC 2008-C40 -- 154347
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-C39, 2008-C40 & 2008-C46 -- 2008 CL20, 2008 CE5, 2007 YB2, 2007 PU11, 2005 XD1, 85804, 85628, 35107, 4450, 3752
`B24`	Cesson Obs. in France, 1 in MPEC 2008-C40 -- 3288
`B11`	Cima Rest Obs. in Italy, 1 in MPEC 2008-C40 -- 2001 VK5
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-C40 -- 2008 CR1, 2008 BE, 2008 AV28, 2007 YF1
`113`	Drebach Obs. in Germany, 1 in MPEC 2008-C39 -- 2008 CE5
`151`	Eschenberg Obs. in Switzerland, 2 in MPEC 2008-C40 -- 2008 BT18, 2008 BD15
`143`	Gnosca Obs. in Switzerland, 1 in MPEC 2008-C47 -- 2008 CM20
`651`	Grasslands Obs. in Arizona, 1 in MPEC 2008-C41 -- 2008 CA6
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-C47 -- 2008 CM20
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2008-C47 -- 2008 CM20
`379`	Hamamatsu-Yuto Obs. in Japan, 4 in MPEC 2008-C40 -- 2008 AF4, 2007 TU24, 2007 TG8, 2005 TU45
`240`	Herrenberg Obs. in Germany, 2 in MPEC 2008-C40 -- 2000 CH59, 174806
`J37`	Huelva Obs. in Spain, 1 in MPEC 2008-C40 -- 4450
`246`	KLENOT in the Czech Republic, 1 in MPEC 2008-C47 -- 2008 CM20
`704`	LINEAR in New Mexico, 16 in MPEC 2008-C40 -- 2008 CZ4, 2008 CY4, 2008 CQ, 2008 CG, 2007 YK, 2005 BE2, 2004 AR1, 86324, 85804, 68359, 53319, 39565, 35107, 174806, 170891, 144922
`474`	Mt. John Obs. in New Zealand, 4 in MPECs 2008-C40 & 2008-C43 -- 2008 CC6, 2008 CA5, 2008 BQ16, 2007 VC138
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 11 in MPECs 2008-C40, 2008-C41, 2008-C42, 2008-C43, 2008-C44, 2008-C45 & 2008-C47 -- 2008 CM20, 2008 CE6, 2008 CD6, 2008 CC6, 2008 CB6, 2008 CA6, 2008 AU26, 2007 PS9, 86067, 39557, 175189
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2008-C40 -- 2008 CM
`J69`	North Obs. in England, 1 in MPEC 2008-C40 -- 2005 EK70
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 11 in MPEC 2008-C40 -- 2008 CP, 2008 BH16, 2008 BD15, 2008 AF4, 2007 YK, 2007 PS9, 2005 TU45, 1993 TQ2, 22099, 170891, 154347
`D29`	Purple Mtn. Obs. XuYi Station in China, 3 in MPEC 2008-C40 -- 2005 BE2, 2002 CF26, 2000 DP107
`691`	Spacewatch 0.9m telescope in Arizona, 11 in MPECs 2008-C40, 2008-C41 & 2008-C43 -- 2008 CC6, 2008 CA6, 2008 BS2, 2008 BO16, 2007 YF1, 2007 VY7, 2005 OE3, 2003 WC25, 1996 AJ1, 22099, 11398
`291`	Spacewatch 1.8m telescope in Arizona, 14 in MPECs 2008-C40, 2008-C41, 2008-C42, 2008-C43, 2008-C44 & 2008-C45 -- 2008 CS1, 2008 CH, 2008 CF, 2008 CE6, 2008 CD6, 2008 CC6, 2008 CB6, 2008 CA6, 2008 BO16, 2008 AG33, 2005 AN19, 2004 SZ19, 2002 SS41, 1997 XV11
`6735`	Jim Young via Table Mtn. Obs. in southern California, 3 in MPECs 2008-C40 & 2008-C46 -- 2008 CS1, 2008 CL20, 2008 CH
`A82`	Trieste Obs. in Italy, 1 in MPEC 2008-C40 -- 2005 TU45
`G72`	University Hills Obs. in southern California, 2 in MPEC 2008-C40 -- 2007 TU24, 2007 TG8

Impact Risk Monitoring on 8 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 CE6	JPL Sentry	2006	2099	1	3.2e-08	-7.06	-7.06	0	JPL: "Analysis based on 17 observations spanning 1.0145 days (2008-Feb-07.4348 to 2008-Feb-08.44929)." Diameter approximately 0.070 km. from mean, weighted H=23.4.

2008 CD6	JPL Sentry	2104	2010-2107	339	2.9e-06	-4.69	-5.46	0	JPL: "Analysis based on 15 observations spanning 1.0135 days (2008-Feb-07.31686 to 2008-Feb-08.33036)." Diameter approximately 0.062 km. from mean, weighted H=23.7.

2008 CB6	JPL Sentry	2104	2035-2107	186	1.9e-05	-5.72	-5.85	0	JPL: "Analysis based on 15 observations spanning 1.0373 days (2008-Feb-07.29202 to 2008-Feb-08.32932)." Diameter approximately 0.014 km. from mean, weighted H=26.9.

2008 CA5	NEODyS	1505	2010-2081	15	7.15e-10	-5.44	-5.48	0	NEODyS: "Based on 30 optical observations (of which 1 are rejected as outliers) from 2008/02/06.484 to 2008/02/07.671."
2008 CA5	JPL Sentry	1504	2010-2107	6	1.9e-09	-4.92	-4.95	0	JPL: "Analysis based on 29 observations spanning 1.1870 days (2008-Feb-06.48341 to 2008-Feb-07.67037)." Diameter approximately 0.351 km. from mean, weighted H=19.9.

2008 CS1	NEODyS	1505	2032-2090	29	1.7e-06	-3.09	-3.43	0	NEODyS: "Based on 21 optical observations (of which 2 are rejected as outliers) from 2008/02/03.503 to 2008/02/07.516."
2008 CS1	JPL Sentry	1504	2032-2103	38	2.1e-06	-3.01	-3.40	0	JPL: "Analysis based on 20 observations spanning 4.0139 days (2008-Feb-03.50178 to 2008-Feb-07.51572)." Diameter approximately 0.310 km. from mean, weighted H=20.2.

2008 BO16	NEODyS	1505	2045	1	2.57e-06	-4.09	-4.09	0	NEODyS: "Based on 36 optical observations (of which 1 are rejected as outliers) from 2008/01/30.382 to 2008/02/07.287."
2008 BO16	JPL Sentry	1504	2045-2049	2	2.7e-06	-4.08	-4.08	0	JPL: "Analysis based on 35 observations spanning 7.9050 days (2008-Jan-30.38083 to 2008-Feb-07.28587)." Diameter approximately 0.086 km. from mean, weighted H=23.0.

2008 AF4	NEODyS	1505	2067-2091	20	8.67e-06	-2.74	-2.97	0	NEODyS: "Based on 413 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/07.717."
2008 AF4	JPL Sentry	1504	2078-2105	35	3.1e-05	-2.21	-2.92	0	JPL: "Analysis based on 409 observations spanning 28.320 days (2008-Jan-10.39652 to 2008-Feb-07.7166)." 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 8 February '08

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

2104	Noted that JPL Sentry has posted 2008 CB6 as an impact risk - see above Noted that JPL Sentry has posted 2008 CD6 as an impact risk - see above Grabbed MPEC 2008-C47 - 2008 CM20 - see above
2006	Noted that JPL Sentry has posted 2008 CE6 as an impact risk - see above Grabbed MPEC 2008-C46 - 2008 CL20 - see above
1730	Grabbed MPEC 2008-C44 - 2008 CD6 - see above Grabbed MPEC 2008-C45 - 2008 CE6 - see above
1703	Grabbed MPEC 2008-C41 - 2008 CA6 - see above Grabbed MPEC 2008-C42 - 2008 CB6 - see above Grabbed MPEC 2008-C43 - 2008 CC6 - see above
1505	Noted that NEODyS has updated its 2008 AF4 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 Grabbed MPEC 2008-C40 - Daily Orbit Update - see above
1504	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above Noted that JPL Sentry has updated its 2008 CA5 risk assessment - see above Noted that NEODyS has posted 2008 CA5 as an impact risk - see above Noted that JPL Sentry has updated its 2008 CS1 risk assessment - see above
0316	Grabbed MPEC 2008-C39 - 2008 CE5 - see above

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