2008-02-14 Tracking News

Contents on 14 February '08

IAU Minor Planet Center
- NEOCP Activity -- eleven listings: 4 new, 7 updated
- New MPECs -- twelve MPECs
- Observers -- 31 observing facilities
Impact Risk Monitoring -- eight 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 14 February '08

The MPC's NEO Confirmation Page has 11 listings: 4 new, 7 updated

When last checked at 2355 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and seven updated listings. Of these, eight 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 14 February '08

Minor Planet Electronic Circulars

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

MPEC 2008-C92 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2008-C93 time-stamped "18:36 UT" - 2008 CW118 - see below
MPEC 2008-C94 time-stamped "18:44 UT" - 2008 CX118 - see below
MPEC 2008-C95 time-stamped "18:54 UT" - 2008 CY118 - see below
MPEC 2008-C96 time-stamped "19:07 UT" - 2008 CA119 - see below
MPEC 2008-C97 time-stamped "19:26 UT" - 2008 CC119 - see below
MPEC 2008-C98 time-stamped "19:37 UT" - 2008 CD119 - see below
MPEC 2008-C99 time-stamped "19:47 UT" - 2008 CE119 - see below
MPEC 2008-C100 time-stamped "19:57 UT" - 2008 CG119 - see below
MPEC 2008-C101 time-stamped "20:09 UT" - 2008 CR118 - see below
MPEC 2008-C102 time-stamped "20:21 UT" - 2008 CZ118 - see below
MPEC 2008-C103 time-stamped "20:32 UT" - 2008 CL72

MPEC 2008-C103 - "20:32 UT" - 2008 CL72

K08C72L 2008 CL72 (H=19.9 ~355m) was discovered at 0931 UT on 9 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 3.27-29p4, 9.40-42p3, and 14.42p4. The discovery was confirmed by Goodricke-Pigott Obs. (Feb. 10.29-31p3) and the Mt. Lemmon Survey (MLS) (Feb. 11.32-33p4).

MPEC 2008-C102 - "20:21 UT" - 2008 CZ118

K08CB8Z 2008 CZ118 (H=18.3 ~741m) was discovered at 0817 UT on 12 Feb. by the CSS, which observed it at Feb. 12.35-38p8 and 12.43-45p4. The discovery was confirmed by Bergisch Gladbach Obs. (Feb. 12.98-00p3), Farra d'Isonzo Obs. (Feb. 13.04-05p2), KLENOT (Feb. 13.07p5), LINEAR (Feb. 13.40-43p3), MLS (Feb. 13.42-44p4), and Astronomical Research Obs. (ARO) (Feb. 14.35-37p3).

MPEC 2008-C101 - "20:09 UT" - 2008 CR118

K08CB8R 2008 CR118 (risk-listed, H=18.6 ~645m) was discovered at 0826 UT on 10 Feb. by the Spacewatch 0.9m telescope, which observed it at Feb. 10.35-39p3 and 12.34-37p3. The discovery was confirmed by the Spacewatch 1.8m telescope (Feb. 13.34-35p3).

MPEC 2008-C100 - "19:57 UT" - 2008 CG119

K08CB9G 2008 CG119 (i=41.1°, H=19.0 ~537m) was discovered at 1015 UT on 13 Feb. by the Siding Spring Survey (SSS), which observed it at Feb. 13.43-55p15 and 14.43p4.

MPEC 2008-C99 - "19:47 UT" - 2008 CE119

K08CB9E 2008 CE119 (small asteroid, H=25.6 ~26m) was discovered at 0714 UT on 13 Feb. by the MLS, which observed it at Feb. 13.30-44p12 and 14.29-33p7.

MPEC 2008-C98 - "19:37 UT" - 2008 CD119

K08CB9D 2008 CD119 (small asteroid, H=25.5 ~27m) was discovered at 0523 UT on 13 Feb. by the MLS, which observed it at Feb. 13.22-32p12 and 14.26-31p8. The discovery was confirmed by Magdalena Ridge Obs. (MRO) (Feb. 13.36-38p5).

MPEC 2008-C97 - "19:26 UT" - 2008 CC119

K08CB9C 2008 CC119 (risk-listed, H=19.0 ~537m) was discovered at 1116 UT on 12 Feb. by LINEAR, which observed it at Feb. 12.47-49p3. The discovery was confirmed by Farpoint Obs. (Feb. 13.43-44p4).

MPEC 2008-C96 - "19:07 UT" - 2008 CA119

K08CB9A 2008 CA119 (small asteroid, H=23.1 ~81m) was discovered at 0835 UT on 12 Feb. by LINEAR, which observed it at Feb. 12.36-41p4. The discovery was confirmed by Farpoint Obs. (Feb. 13.40-41p3), ARO (Feb. 14.33-34p4), MLS (Feb. 14.35-36p4), and Sabino Canyon Obs. (Feb. 14.42-43p3).

MPEC 2008-C95 - "18:54 UT" - 2008 CY118

K08CB8Y 2008 CY118 (small asteroid, H=25.0 ~34m) was discovered at 0757 UT on 12 Feb. by the MLS, which observed it at Feb. 12.33-42p8 and 14.27-31p8 at V=22.1-7.

MPEC 2008-C94 - "18:44 UT" - 2008 CX118

K08CB8X 2008 CX118 (small asteroid, H=24.4 ~45m) was discovered at 0658 UT on 12 Feb. by the MLS, which observed it at Feb. 12.29-32p4 at V=22.4, 12.36-38p4 at V=23.0, 13.23-24p4, and 14.26-31p8 at V=22.1-5. The discovery was confirmed by Spacewatch 1.8m (Feb. 12.43-44p2) and MRO (Feb. 13.31-34p4).

MPEC 2008-C93 - "18:36 UT" - 2008 CW118

K08CB8W 2008 CW118 (small asteroid, H=25.0 ~34m) was discovered at 0751 UT on 10 Feb. by the MLS, which observed it at Feb. 10.33-41p8 and 11.21-22p4 at V=22.1. The discovery was confirmed by Great Shefford Obs. (Feb. 10.93-95p2) and Spacewatch 1.8m (Feb. 11.15-16p3).

<< DOU on 14 Feb. '08 >> MPEC 2008-C92 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08C71C 2008 CC71 (small asteroid, arc=4 days, H=24.7 ~39m) from Spacewatch 1.8m (Feb. 13.38-39p3)
K08C70K 2008 CK70 (small asteroid, arc=4 days, H=25.3 ~29m) from Klet Obs. (Feb. 12.96-97p7)
K08C01S 2008 CS1 (arc=10 days, H=20.2 ~309m) from MRO (Feb. 13.53p3)
K08A04F 2008 AF4 (arc=35 days, H=19.7 ~389m) from Hradec Kralove Obs. (Feb. 12.98p5), Madonna di Dossobuono Obs. (Feb. 13.92p3), and Klet Obs. (Feb. 13.92-93p7)
E4898 144898 2004 VD17 from MRO (Feb. 13.50-51p3)
Observations of recently (no longer) risk-listed objects
K08C22D 2008 CD22 (almost small, arc=5 days, H=21.9 ~141m) from Madonna di Dossobuono Obs. (Feb. 13.89-90p3) and Klet Obs. (Feb. 13.91p7)
K08C22B 2008 CB22 (arc=5 days, H=19.7 ~389m) from Thierry Pauwels via Uccle Obs. (Feb. 13.14-15p2)
K08C05A 2008 CA5 (arc=7 days, H=19.8 ~371m) from Desert Moon Obs. (Feb. 13.45-47p3)
K08B18T 2008 BT18 (arc=13 days, H=18.5 ~676m) from LINEAR (Feb. 13.22-27p5)
K08B15D 2008 BD15 (arc=15 days, H=20.6 ~257m) from Klet Obs. (Feb. 13.89-90p7)
Observations of small asteroids (H>22.0)
K08CB6P 2008 CP116 (arc=61 days, H=22.9 ~89m) from LINEAR (Feb. 13.20-26p10), Verona Obs. (Feb. 13.88-89p4), Madonna di Dossobuono Obs. (Feb. 13.91p3), and Monte Agliale Obs. (Feb. 13.91-93p3)
K08C70L 2008 CL70 (arc=5 days, H=22.8 ~93m) from KLENOT (Feb. 13.99p5)
K08C22C 2008 CC22 (arc=5 days, H=24.0 ~54m) from Desert Moon Obs. (Feb. 13.35-42p3)
K08C00P 2008 CP (arc=12 days, H=24.1 ~51m) from LINEAR (Feb. 13.27-31p5), Madonna di Dossobuono Obs. (Feb. 13.93-94p3), and Klet Obs. (Feb. 13.96p7)
K08C00O 2008 CO (arc=12 days, H=22.8 ~93m) from Desert Moon Obs. (Feb. 13.12-18p3) and KLENOT (Feb. 13.90-91p5)
K08C00G 2008 CG (arc=12 days, H=22.2 ~123m) from LINEAR (Feb. 13.22-27p5) and CSS (Feb. 13.22-24p4)
K07P09S 2007 PS9 (arc=186 days, H=23.6 ~65m) from KLENOT (Feb. 13.89p6)
Observations of almost-small asteroids (21.7<H<=22.0)
K08C06C 2008 CC6 (q=0.281 AU, arc=7 days, H=22.0 ~135m) from KLENOT (Feb. 13.98-99p4)
Observations of other objects
K08CB6R 2008 CR116 (arc=3 days, H=20.4 ~282m) from Verona Obs. (Feb. 13.91-92p4) and Monte Agliale Obs. (Feb. 13.94-96p3)
K08CB6O 2008 CO116 (arc=3 days, H=21.2 ~195m) from Herrenberg Obs. (Feb. 13.84-85p4)
K08C70J 2008 CJ70 (arc=11 days, H=21.4 ~178m) from KLENOT (Feb. 13.91-92p3)
K08C01R 2008 CR1 (i=45.9°, arc=11 days, H=19.5 ~426m) from Desert Moon Obs. (Feb. 13.21-24p3) and KLENOT (Feb. 13.95p5)
K08C01N 2008 CN1 (arc=12 days, H=20.7 ~245m) from Klet Obs. (Feb. 14.01p7)
K08C01L 2008 CL1 (arc=11 days, H=19.1 ~513m) from LINEAR (Feb. 13.39-44p5)
K08C00M 2008 CM (i=36.0°, arc=11 days, H=17.1 ~1.29 km) from Desert Moon Obs. (Feb. 13.08-10p3)
K08B16Q 2008 BQ16 (arc=14 days, H=19.4 ~446m) from Desert Moon Obs. (Feb. 13.50-53p3)
K08B16H 2008 BH16 (arc=15 days, H=20.5 ~269m) from Klet Obs. (Feb. 13.98p6)
K06SD1U 2006 SU131 (arc=2 opp, H=18.7 ~616m) from CSS (Feb. 13.31-33p4)
K06J25Y 2006 JY25 (arc=3 opp, H=20.3 ~295m) from Klet Obs. (Feb. 13.94p5)
K06D62U 2006 DU62 (arc=3 opp, H=18.2 ~776m) from Klet Obs. (Feb. 14.00-01p7)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from La Fecha Obs. (Feb. 13.85p1, 13.94p1 & 14.04p1)
K05E70K 2005 EK70 (arc=4 opp, H=17.5 ~1.07 km) from Willow Bank Obs. (Feb. 13.80-82p4)
K04N09C 2004 NC9 (Q=4.194 AU, arc=3 opp, H=17.2 ~1.23 km) from CSS (Feb. 13.20-21p4)
K04D02G 2004 DG2 (arc=4 opp, H=18.6 ~645m) from Madonna di Dossobuono Obs. (Feb. 13.95-96p3)
K04A01R 2004 AR1 (arc=3 opp, H=19.8 ~371m) from LINEAR (Feb. 13.16-21p4)
K02A31V 2002 AV31 (arc=3 opp, H=20.5 ~269m) from CSS (Feb. 13.19-21p4)
K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from CSS (Feb. 13.25-27p4) and LINEAR (Feb. 13.28-33p5)
K00D01M 2000 DM1 (arc=5 opp, H=18.1 ~812m) from LINEAR (Feb. 13.28-33p5), Spacewatch 0.9m (Feb. 13.38-41p3), and Spacewatch 1.8m (Feb. 13.38-39p3)
H3561 173561 2000 YV137 from LINEAR (Feb. 13.21-26p5)
H2722 172722 2004 BV102 from LONEOS (Feb. 13.21-29p4)
H0891 170891 2004 TY16 from LINEAR (Feb. 13.15-20p5), CSS (Feb. 13.17-19p4), and Hack Obs. (Feb. 13.87-88p4)
G3693 163693 Atira (2003 CP20) from CSS (Feb. 13.08-09p4)
G2038 162038 1996 DH from Goodricke-Pigott Obs. (Feb. 12.27-30p3) and MLS (Feb. 13.23-24p8)
F4347 154347 2002 XK4 from CSS (Feb. 13.17-19p4) and LINEAR (Feb. 13.21-26p5)
F3591 153591 2001 SN263 from LINEAR (Feb. 13.10-15p5) and Hack Obs. (Feb. 13.85-86p5)
F2679 152679 1998 KU2 from MLS (Feb. 13.45-47p4)
E4922 144922 2005 CK38 from CSS (Feb. 13.19-21p4) and LINEAR (Feb. 13.26-31p4)
E4901 144901 2004 WG1 from LINEAR (Feb. 13.32-37p4)
D7158 137158 1999 FB from CSS (Feb. 13.51-53p4)
D7078 137078 1998 XZ4 from Spacewatch 0.9m (Feb. 13.23-31p6)
85839 85839 1998 YO4 from LINEAR (Feb. 13.45-49p4) and CSS (Feb. 13.48-50p4)
22099 22099 2000 EX106 from LINEAR (Feb. 13.27-32p5)
11398 11398 1998 YP11 from Spacewatch 0.9m (Feb. 13.37-41p3)
04544 4544 Xanthus (1989 FB) from Crni Vrh Obs. (Feb. 12.76-78p4)
04450 4450 Pan (1987 SY) from Capannoli Obs. (Feb. 12.89p1) and Eschenberg Obs. (Feb. 13.76-78p6)
03552 3552 Don Quixote (1983 SA) from Spacewatch 0.9m (Feb. 13.37-41p3)
02202 2202 Pele (1972 RA) from Spacewatch 0.9m (Feb. 13.22-31p6)
01864 1864 Daedalus (1971 FA) from Goodricke-Pigott Obs. (Feb. 12.41-43p3), LINEAR (Feb. 13.34-39p5), and LONEOS (Feb. 13.42-45p3)
01862 1862 Apollo (1932 HA) from LINEAR (Feb. 13.15-25p9) and CSS (Feb. 13.17-19p4)
01620 1620 Geographos (1951 RA) from Hradec Kralove Obs. (Feb. 12.99-00p5) and CSS (Feb. 13.25-27p4)
01036 1036 Ganymed (1924 TD) from Montana Blanca Obs. (Feb. 13.81-83p3)

Observers on 14 February '08

A total of 31 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 2 in MPECs 2008-C96 & 2008-C102 -- 2008 CZ118, 2008 CA119
`621`	Bergisch Gladbach Obs. in Germany, 1 in MPEC 2008-C102 -- 2008 CZ118
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2008-C92 -- 4450
`703`	Catalina Sky Survey (CSS) in Arizona, 15 in MPECs 2008-C92, 2008-C102 & 2008-C103 -- 2008 CZ118, 2008 CL72, 2008 CG, 2006 SU131, 2004 NC9, 2002 AV31, 2000 DP107, 85839, 170891, 163693, 154347, 144922, 137158, 1862, 1620
`106`	Crni Vrh Obs. in Slovenia, 1 in MPEC 2008-C92 -- 4544
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2008-C92 -- 2008 CR1, 2008 CO, 2008 CM, 2008 CC22, 2008 CA5, 2008 BQ16
`151`	Eschenberg Obs. in Switzerland, 1 in MPEC 2008-C92 -- 4450
`734`	Farpoint Obs. in Kansas, 2 in MPECs 2008-C96 & 2008-C97 -- 2008 CC119, 2008 CA119
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-C102 -- 2008 CZ118
`683`	Goodricke-Pigott Obs. in Arizona, 3 in MPECs 2008-C92 & 2008-C103 -- 2008 CL72, 162038, 1864
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-C93 -- 2008 CW118
`A57`	Hack Obs. in Italy, 2 in MPEC 2008-C92 -- 170891, 153591
`240`	Herrenberg Obs. in Germany, 1 in MPEC 2008-C92 -- 2008 CO116
`048`	Hradec Kralove Obs. in the Czech Republic, 2 in MPEC 2008-C92 -- 2008 AF4, 1620
`246`	KLENOT in the Czech Republic, 7 in MPECs 2008-C92 & 2008-C102 -- 2008 CZ118, 2008 CR1, 2008 CO, 2008 CL70, 2008 CJ70, 2008 CC6, 2007 PS9
`046`	Klet Obs. in the Czech Republic, 9 in MPEC 2008-C92 -- 2008 CP, 2008 CN1, 2008 CK70, 2008 CD22, 2008 BH16, 2008 BD15, 2008 AF4, 2006 JY25, 2006 DU62
`704`	LINEAR in New Mexico, 21 in MPECs 2008-C92, 2008-C96, 2008-C97 & 2008-C102 -- 2008 CZ118, 2008 CP116, 2008 CP, 2008 CL1, 2008 CG, 2008 CC119, 2008 CA119, 2008 BT18, 2004 AR1, 2000 DP107, 2000 DM1, 85839, 22099, 173561, 170891, 154347, 153591, 144922, 144901, 1864, 1862
`699`	LONEOS in Arizona, 2 in MPEC 2008-C92 -- 172722, 1864
`J34`	La Fecha Obs. in Spain, 1 in MPEC 2008-C92 -- 2005 TU45
`560`	Madonna di Dossobuono Obs. in Italy, 5 in MPEC 2008-C92 -- 2008 CP116, 2008 CP, 2008 CD22, 2008 AF4, 2004 DG2
`H01`	Magdalena Ridge Obs. (MRO) in New Mexico, 4 in MPECs 2008-C92, 2008-C94 & 2008-C98 -- 2008 CX118, 2008 CS1, 2008 CD119, 144898
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-C92 -- 1036
`159`	Monte Agliale Obs. in Italy, 2 in MPEC 2008-C92 -- 2008 CR116, 2008 CP116
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-C92, 2008-C93, 2008-C94, 2008-C95, 2008-C96, 2008-C98, 2008-C99, 2008-C102 & 2008-C103 -- 2008 CZ118, 2008 CY118, 2008 CX118, 2008 CW118, 2008 CL72, 2008 CE119, 2008 CD119, 2008 CA119, 162038, 152679
`854`	Sabino Canyon Obs. in Arizona, 1 in MPEC 2008-C96 -- 2008 CA119
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-C100 -- 2008 CG119
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPECs 2008-C92 & 2008-C101 -- 2008 CR118, 2000 DM1, 137078, 11398, 3552, 2202
`291`	Spacewatch 1.8m telescope in Arizona, 5 in MPECs 2008-C92, 2008-C93, 2008-C94 & 2008-C101 -- 2008 CX118, 2008 CW118, 2008 CR118, 2008 CC71, 2000 DM1
`0122`	Thierry Pauwels via Uccle Obs. in Belgium, 1 in MPEC 2008-C92 -- 2008 CB22
`A48`	Verona Obs. in Italy, 2 in MPEC 2008-C92 -- 2008 CR116, 2008 CP116
`J71`	Willow Bank Obs. in England, 1 in MPEC 2008-C92 -- 2005 EK70

Impact Risk Monitoring on 14 February '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2355 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 CC119	JPL Sentry	2202	2021-2044	10	1.6e-09	-5.45	-6.05	0	JPL: "Analysis based on 7 observations spanning .96831 days (2008-Feb-12.46986 to 2008-Feb-13.43817)." Diameter approximately 0.570 km. from mean, weighted H=18.9.

2008 CR118	JPL Sentry	2304	2017-2107	143	8.0e-07	-3.12	-3.85	0	JPL: "Analysis based on 9 observations spanning 2.9973 days (2008-Feb-10.3515 to 2008-Feb-13.34881)." Diameter approximately 0.546 km. from mean, weighted H=19.0.

2008 CL116	NEODyS	1526	2026-2089	53	5.47e-07	-3.60	-4.13	0	NEODyS: "Based on 47 optical observations (of which 0 are rejected as outliers) from 2008/02/10.407 to 2008/02/13.443."

2008 CC71	JPL Sentry	1526	2033-2082	34	1.3e-04	-3.90	-4.03	0	JPL: "Analysis based on 21 observations spanning 3.9902 days (2008-Feb-09.39625 to 2008-Feb-13.38641)." Diameter approximately 0.038 km. from mean, weighted H=24.7.
2008 CC71	NEODyS	1526	2033-2084	43	1.21e-04	-3.93	-4.07	0	NEODyS: "Based on 21 optical observations (of which 0 are rejected as outliers) from 2008/02/09.397 to 2008/02/13.387."

2008 CK70	JPL Sentry	1526	2030-2031	2	2.9e-04	-3.16	-3.16	0	JPL: "Analysis based on 66 observations spanning 3.6272 days (2008-Feb-09.34106 to 2008-Feb-12.9683)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
2008 CK70	NEODyS	1526	2030-2032	4	2.78e-04	-3.17	-3.17	0	NEODyS: "Based on 66 optical observations (of which 0 are rejected as outliers) from 2008/02/09.342 to 2008/02/12.969."

2008 CS1	JPL Sentry	1526	2048-2107	3	2.5e-08	-5.27	-5.53	0	JPL: "Analysis based on 32 observations spanning 10.031 days (2008-Feb-03.50178 to 2008-Feb-13.5326)." Diameter approximately 0.300 km. from mean, weighted H=20.3.
2008 CS1	NEODyS	1526	2071-2089	3	6.76e-09	-5.84	-6.05	0	NEODyS: "Based on 34 optical observations (of which 2 are rejected as outliers) from 2008/02/03.503 to 2008/02/13.533."

2008 AF4	JPL Sentry	1526	2078-2099	22	1.9e-05	-2.41	-2.63	0	JPL: "Analysis based on 501 observations spanning 34.531 days (2008-Jan-10.39652 to 2008-Feb-13.92722)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
2008 AF4	NEODyS	1526	2078-2090	11	1.31e-05	-2.55	-2.63	0	NEODyS: "Based on 505 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/13.928."

144898 2004 VD17	NEODyS	1802	2102-2104	2	2.86e-07	-4.21	-4.21	0	NEODyS: "Based on 964 optical observations (of which 4 are rejected as outliers) from 2002/02/16.463 to 2008/02/13.515."
144898 2004 VD17	JPL Sentry	1526	R E M O V E D						JPL: Risk listing removed at 1210 UTC.

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 14 February '08

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

2304	Noted that JPL Sentry has posted 2008 CR118 as an impact risk - see above
2202	Noted that JPL Sentry has posted 2008 CC119 as an impact risk - see above
2100	Grabbed MPEC 2008-C101 - 2008 CR118 - see above Grabbed MPEC 2008-C102 - 2008 CZ118 - see above Grabbed MPEC 2008-C103 - 2008 CL72 - see above
2006	Grabbed MPEC 2008-C93 - 2008 CW118 - see above Grabbed MPEC 2008-C94 - 2008 CX118 - see above Grabbed MPEC 2008-C95 - 2008 CY118 - see above Grabbed MPEC 2008-C96 - 2008 CA119 - see above Grabbed MPEC 2008-C97 - 2008 CC119 - see above Grabbed MPEC 2008-C98 - 2008 CD119 - see above Grabbed MPEC 2008-C99 - 2008 CE119 - see above Grabbed MPEC 2008-C100 - 2008 CG119 - see above
1802	Noted that NEODyS has updated its 2004 VD17 risk assessment - see above
1533	Grabbed MPEC 2008-C92 - Daily Orbit Update - see above
1526	Noted that JPL Sentry has removed 144898 2004 VD17 as an impact risk - see above Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 CC71 risk assessment - see above Noted that NEODyS has updated its 2008 CC71 risk assessment - see above Noted that JPL Sentry has updated its 2008 CK70 risk assessment - see above Noted that NEODyS has updated its 2008 CK70 risk assessment - see above Noted that JPL Sentry has updated its 2008 CS1 risk assessment - see above Noted that NEODyS has updated its 2008 CS1 risk assessment - see above
1525	Noted that NEODyS has posted 2008 CL116 as an impact risk - see above

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