2008-02-07 Tracking News

Contents on 7 February '08

IAU Minor Planet Center
- NEOCP Activity -- eleven listings: 4 new, 7 updated
- New MPECs -- four MPECs
- Observers -- 23 observing facilities
Impact Risk Monitoring -- three 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 7 February '08

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

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and seven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of seventeen 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 7 February '08

Minor Planet Electronic Circulars

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

MPEC 2008-C35 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2008-C36 time-stamped "14:45 UT" - 2008 CY4 - see below
MPEC 2008-C37 time-stamped "14:49 UT" - 2008 CZ4 - see below
MPEC 2008-C38 time-stamped "14:53 UT" - 2008 CA5

MPEC 2008-C38 - "14:53 UT" - 2008 CA5

K08C05A 2008 CA5 (risk-listed, H=19.8 ~371m) was discovered at 1136 UT on 6 Feb. by the Catalina Sky Survey (CSS), which observed it at Feb. 6.48-54p8. The discovery was confirmed by Mt. John Obs. (Feb. 6.58p4), Grasslands Obs. (Feb. 7.33p3), the Spacewatch 1.8m telescope (Feb. 7.44p3), and the Mt. Lemmon Survey (MLS) (Feb. 7.47-52p8).

MPEC 2008-C37 - "14:49 UT" - 2008 CZ4

K08C04Z 2008 CZ4 (small asteroid, Earth MOID=8.6 LD, H=25.1 ~32m) was discovered at 0642 UT on 6 Feb. by LINEAR, which observed it at Feb. 6.28-33p5. The discovery was confirmed by Jim Young via Table Mtn. Obs. (Feb. 7.19-21p6 & 7.30-31p4), Grasslands Obs. (Feb. 7.26p3), and Mt. John Obs. (Feb. 7.43p4 & 7.49-50p4). This object was within ten lunar distances (LD) of Earth, reaching 8.8 LD on 4 Feb.

MPEC 2008-C36 - "14:45 UT" - 2008 CY4

K08C04Y 2008 CY4 (small asteroid, H=22.5 ~107m) was discovered at 0552 UT on 6 Feb. by the CSS, which observed it at Feb. 6.24-33p8. The discovery was confirmed by LINEAR (Feb. 6.28-33p5), Young/Table Mtn. (Feb. 6.37-38p4 & 7.22-24p4), San Marcello Pistoiese Obs. (Feb. 6.85p3), Remanzacco Obs. (Feb. 6.86-87p2), Schiaparelli Obs. (Feb. 7.13-14p3), Spacewatch 1.8m (Feb. 7.20-21p3), Grasslands Obs. (Feb. 7.27p3), and MLS (Feb. 7.29-31p4).

<< DOU on 7 Feb. '08 >> MPEC 2008-C35 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08B16O 2008 BO16 (small asteroid, Q=4.441 AU, arc=7 days, H=22.8 ~93m) from Spacewatch 1.8m (Feb. 6.29-30p3)
K08A04F 2008 AF4 (arc=28 days, H=19.7 ~389m) from Brainerd Obs. (Feb. 6.16-17p2), University Hills Obs. (Feb. 6.30-31p6), and Spacewatch 1.8m (Feb. 6.43-44p3 & 7.21-23p3)
Observations of recently (no longer) risk-listed objects
K08C00K 2008 CK (small asteroid, arc=2 days, H=26.2 ~19m) from KLENOT (Feb. 3.92p3)
K08B18T 2008 BT18 (arc=6 days, H=18.4 ~708m) from Gnosca Obs. (Feb. 5.89-91p2), CSS (Feb. 6.25-27p4), Spacewatch 1.8m (Feb. 6.28-29p3), LINEAR (Feb. 6.29-32p4), Desert Moon Obs. (Feb. 6.33-35p3), and Young/Table Mtn. (Feb. 6.35-36p4)
K08B15D 2008 BD15 (arc=8 days, H=20.6 ~257m) from Gnosca Obs. (Feb. 5.84-85p3), Brainerd Obs. (Feb. 6.15-16p5), University Hills Obs. (Feb. 6.28-29p6), Verona Obs. (Feb. 6.89p4), and Madonna di Dossobuono Obs. (Feb. 6.89p3)
K08A33N 2008 AN33 (Q=4.344 AU, arc=22 days, H=18.9 ~562m) from Desert Moon Obs. (Feb. 6.42-46p3) and McDonald Obs. (Feb. 6.46-48p3)
K08A33K 2008 AK33 (arc=22 days, H=20.6 ~257m) from Spacewatch 1.8m (Feb. 6.24-25p3 at V=22.4)
Observations of small asteroids (H>22.0)
K08C00Q 2008 CQ (arc=4 days, H=25.4 ~28m) from Gnosca Obs. (Feb. 5.92-93p2), CSS (Feb. 6.25-27p4), LINEAR (Feb. 6.29-33p4), and Young/Table Mtn. (Feb. 6.40-42p4)
K08C00P 2008 CP (arc=5 days, H=23.8 ~59m) from Young/Table Mtn. (Feb. 7.26-27p4)
K08C00O 2008 CO (arc=4 days, H=22.8 ~93m) from Desert Moon Obs. (Feb. 6.25-29p3)
K08C00G 2008 CG (arc=5 days, H=22.1 ~129m) from Gnosca Obs. (Feb. 5.95-96p2), LINEAR (Feb. 6.34-39p5), Desert Moon Obs. (Feb. 6.38-40p3), Young/Table Mtn. (Feb. 6.38-40p4), and Mt. John Obs. (Feb. 6.55p3)
K07V03H 2007 VH3 (arc=96 days, H=22.7 ~98m) from Desert Moon Obs. (Feb. 6.16-22p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08C01H 2008 CH1 (arc=5 days, H=21.9 ~141m) from Spacewatch 1.8m (Feb. 6.41-42p3 & 7.24-25p3)
Observations of other objects
K08C01N 2008 CN1 (arc=4 days, H=20.7 ~245m) from McDonald Obs. (Feb. 6.48-49p3)
K08C01L 2008 CL1 (arc=4 days, H=19.1 ~513m) from McDonald Obs. (Feb. 6.50-51p3)
K08C00M 2008 CM (arc=4 days, H=17.0 ~1.35 km) from Desert Moon Obs. (Feb. 6.11-13p3)
K08B16P 2008 BP16 (q=0.290 AU, arc=7 days, H=21.7 ~155m) from CSS (Feb. 6.41-43p4)
K08B16H 2008 BH16 (arc=8 days, H=20.6 ~257m) from Desert Moon Obs. (Feb. 6.31p3) and Verona Obs. (Feb. 6.90-91p4)
K08A33H 2008 AH33 (i=36.7°, arc=25 days, H=19.3 ~467m) from Mt. John Obs. (Feb. 6.65-66p4)
K08A28T 2008 AT28 (arc=27 days, H=18.6 ~645m) from Spacewatch 1.8m (Feb. 6.26-27p3)
K08A01X 2008 AX1 (arc=30 days, H=21.3 ~186m) from Spacewatch 1.8m (Feb. 7.18-19p2 at V=22.2)
K08A00E 2008 AE (arc=2 opp, H=19.6 ~407m) from CSS (Feb. 6.36-39p4)
K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from CSS (Feb. 6.25-27p4)
K07X03P 2007 XP3 (q=0.252 AU, Q=4.235 AU, arc=61 days, H=19.1 ~513m) from Astronomical Research Obs. (ARO) (Feb. 3.07-09p2 at V=22.5-6)
K07VI4G 2007 VG184 (arc=87 days, H=17.4 ~1.12 km) from Spacewatch 1.8m (Feb. 6.09-10p3)
K07V07Y 2007 VY7 (arc=3 opp, H=19.6 ~407m) from McDonald Obs. (Feb. 6.52-53p3)
K07U06S 2007 US6 (arc=3 opp, H=18.3 ~741m) from Gnosca Obs. (Feb. 2.77-78p2)
K07U02A 2007 UA2 (arc=122 days, H=21.0 ~214m) from Spacewatch 1.8m (Feb. 6.19-20p3)
K07T24U 2007 TU24 (arc=118 days, H=20.6 ~257m) from Farra d'Isonzo Obs. (Jan. 28.77p2, 28.88p2 & 29.84p2), Szeged Obs. (Jan. 28.84-85p19), and Gnosca Obs. (Feb. 5.97-98p2)
K07T08G 2007 TG8 (Q=4.305 AU, arc=146 days, H=18.6 ~645m) from University Hills Obs. (Feb. 6.41-42p6)
K07R20A 2007 RA20 (arc=145 days, H=20.0 ~339m) from Spacewatch 1.8m (Feb. 6.53-55p3 at V=22.5)
K06W01R 2006 WR1 (i=38.2°, arc=2 opp, H=17.7 ~977m) from Spacewatch 1.8m (Feb. 6.15-16p3 at V=22.9)
K05T45U 2005 TU45 (arc=3 opp, H=17.1 ~1.29 km) from Brainerd Obs. (Feb. 6.13-14p5)
K04V64A 2004 VA64 (q=0.268 AU, Q=4.658 AU, arc=3 opp, H=17.2 ~1.23 km) from Spacewatch 1.8m (Feb. 6.17-18p3 at V=22.2-4)
K04A01R 2004 AR1 (arc=3 opp, H=19.8 ~371m) from Madonna di Dossobuono Obs. (Feb. 6.90-91p3)
K02C26F 2002 CF26 (arc=5 opp, H=17.2 ~1.23 km) from McDonald Obs. (Feb. 5.40-42p3)
K02AC9J 2002 AJ129 (q=0.117 AU, arc=3 opp, H=18.5 ~676m) from Spacewatch 1.8m (Feb. 6.49-51p3)
K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from LINEAR (Feb. 6.35-40p5)
K00D01M 2000 DM1 (arc=5 opp, H=18.1 ~812m) from LINEAR (Feb. 6.35-40p4) and CSS (Feb. 6.40-43p4)
J97X11V 1997 XV11 (i=44.3°, arc=3 opp, H=18.4 ~708m) from Spacewatch 1.8m (Feb. 6.13p2)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from Madonna di Dossobuono Obs. (Feb. 6.92p3)
H3561 173561 2000 YV137 from LONEOS (Feb. 6.25-32p4) and LINEAR (Feb. 6.28-33p5)
H0891 170891 2004 TY16 from McDonald Obs. (Feb. 6.10-18p5)
G3696 163696 2003 EB50 from LINEAR (Feb. 6.10-14p4)
F4589 154589 2003 MX2 from LINEAR (Feb. 6.28-31p4)
A1869 101869 1999 MM from CSS (Feb. 6.13-14p4)
66959 66959 1999 XO35 from LINEAR (Feb. 6.18-21p3)
09172 9172 Abhramu (1989 OB) from Peter De Cat via Uccle Obs. (Feb. 6.92-94p4)
04450 4450 Pan (1987 SY) from LONEOS (Feb. 6.24p1 & 6.28-31p2)
01864 1864 Daedalus (1971 FA) from CSS (Feb. 6.44-47p3)
01862 1862 Apollo (1932 HA) from LINEAR (Feb. 6.22-27p5)

Observers on 7 February '08

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

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2008-C35 -- 2007 XP3
`726`	Brainerd Obs. in Minnesota, 3 in MPEC 2008-C35 -- 2008 BD15, 2008 AF4, 2005 TU45
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPECs 2008-C35, 2008-C36 & 2008-C38 -- 2008 CY4, 2008 CQ, 2008 CA5, 2008 BT18, 2008 BP16, 2008 AE, 2007 YK, 2000 DM1, 101869, 1864
`448`	Desert Moon Obs. in New Mexico, 7 in MPEC 2008-C35 -- 2008 CO, 2008 CM, 2008 CG, 2008 BT18, 2008 BH16, 2008 AN33, 2007 VH3
`595`	Farra d'Isonzo Obs. in Italy, 1 in MPEC 2008-C35 -- 2007 TU24
`143`	Gnosca Obs. in Switzerland, 6 in MPEC 2008-C35 -- 2008 CQ, 2008 CG, 2008 BT18, 2008 BD15, 2007 US6, 2007 TU24
`651`	Grasslands Obs. in Arizona, 3 in MPECs 2008-C36, 2008-C37 & 2008-C38 -- 2008 CZ4, 2008 CY4, 2008 CA5
`246`	KLENOT in the Czech Republic, 1 in MPEC 2008-C35 -- 2008 CK
`704`	LINEAR in New Mexico, 12 in MPECs 2008-C35, 2008-C36 & 2008-C37 -- 2008 CZ4, 2008 CY4, 2008 CQ, 2008 CG, 2008 BT18, 2000 DP107, 2000 DM1, 66959, 173561, 163696, 154589, 1862
`699`	LONEOS in Arizona, 2 in MPEC 2008-C35 -- 173561, 4450
`560`	Madonna di Dossobuono Obs. in Italy, 3 in MPEC 2008-C35 -- 2008 BD15, 2004 AR1, 1993 TQ2
`711`	McDonald Obs. in Texas, 6 in MPEC 2008-C35 -- 2008 CN1, 2008 CL1, 2008 AN33, 2007 VY7, 2002 CF26, 170891
`474`	Mt. John Obs. in New Zealand, 4 in MPECs 2008-C35, 2008-C37 & 2008-C38 -- 2008 CZ4, 2008 CG, 2008 CA5, 2008 AH33
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-C36 & 2008-C38 -- 2008 CY4, 2008 CA5
`473`	Remanzacco Obs. in Italy, 1 in MPEC 2008-C36 -- 2008 CY4
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-C36 -- 2008 CY4
`204`	Schiaparelli Obs. in Italy, 1 in MPEC 2008-C36 -- 2008 CY4
`291`	Spacewatch 1.8m telescope in Arizona, 16 in MPECs 2008-C35, 2008-C36 & 2008-C38 -- 2008 CY4, 2008 CH1, 2008 CA5, 2008 BT18, 2008 BO16, 2008 AX1, 2008 AT28, 2008 AK33, 2008 AF4, 2007 VG184, 2007 UA2, 2007 RA20, 2006 WR1, 2004 VA64, 2002 AJ129, 1997 XV11
`629`	Szeged Obs. in Hungary, 1 in MPEC 2008-C35 -- 2007 TU24
`6735`	Jim Young via Table Mtn. Obs. in southern California, 6 in MPECs 2008-C35, 2008-C36 & 2008-C37 -- 2008 CZ4, 2008 CY4, 2008 CQ, 2008 CP, 2008 CG, 2008 BT18
`0125`	Peter De Cat via Uccle Obs. in Belgium, 1 in MPEC 2008-C35 -- 9172
`G72`	University Hills Obs. in southern California, 3 in MPEC 2008-C35 -- 2008 BD15, 2008 AF4, 2007 TG8
`A48`	Verona Obs. in Italy, 2 in MPEC 2008-C35 -- 2008 BH16, 2008 BD15

Impact Risk Monitoring on 7 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 CA5	JPL Sentry	1759	2054-2066	2	4.1e-10	-6.60	-6.74	0	JPL: "Analysis based on 25 observations spanning 1.0329 days (2008-Feb-06.48341 to 2008-Feb-07.51627)." Diameter approximately 0.370 km. from mean, weighted H=19.8.

2008 BO16	JPL Sentry	1658	2045-2065	3	2.2e-06	-4.14	-4.14	0	JPL: "Analysis based on 30 observations spanning 6.9198 days (2008-Jan-30.38083 to 2008-Feb-06.30068)." Diameter approximately 0.088 km. from mean, weighted H=22.9.
2008 BO16	NEODyS	1607	2045	1	2.11e-06	-4.15	-4.15	0	NEODyS: "Based on 31 optical observations (of which 1 are rejected as outliers) from 2008/01/30.382 to 2008/02/06.301."

2008 AF4	NEODyS	1607	2075-2090	17	7.58e-06	-2.80	-3.06	0	NEODyS: "Based on 402 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/07.229."
2008 AF4	JPL Sentry	1606	2078-2105	37	3.9e-05	-2.12	-2.76	0	JPL: "Analysis based on 398 observations spanning 27.832 days (2008-Jan-10.39652 to 2008-Feb-07.22804)." Diameter approximately 0.380 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 7 February '08

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

1759	Noted that JPL Sentry has posted 2008 CA5 as an impact risk - see above
1658	Noted that JPL Sentry has updated its 2008 BO16 risk assessment - see above
1607	Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that NEODyS has updated its 2008 BO16 risk assessment - see above Grabbed MPEC 2008-C35 - Daily Orbit Update - see above
1606	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Grabbed MPEC 2008-C36 - 2008 CY4 - see above Grabbed MPEC 2008-C37 - 2008 CZ4 - see above Grabbed MPEC 2008-C38 - 2008 CA5 - see above

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