2008-02-15 Tracking News

Contents on 15 February '08

IAU Minor Planet Center
- NEOCP Activity -- eight listings: 4 new, 4 updated
- New MPECs -- three MPECs
- Observers -- eighteen observing facilities
Impact Risk Monitoring -- five 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 15 February '08

The MPC's NEO Confirmation Page has 8 listings: 4 new, 4 updated

When last checked at 1659 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and four updated listings. Of these, seven were "one nighters." So far The Tracking News has counted a total of ten 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 15 February '08

Minor Planet Electronic Circulars

As of last check at 1659 UTC, there have been three MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-C104 time-stamped "03:44 UT" - 2008 CJ119 - see below
MPEC 2008-C105 time-stamped "03:53 UT" - 2008 CK119 - see below
MPEC 2008-C106 time-stamped "07:10 UT" - Daily Orbit Update

<< DOU on 15 Feb. '08 >> MPEC 2008-C106 - "07:10 UT" - Daily Orbit Update

Observations of risk-listed objects
K08CB9C 2008 CC119 (Q=5.772 AU, arc=2 days, H=18.3 ~741m) from Astronomical Research Obs. (ARO) (Feb. 14.36-37p3)
K08C70K 2008 CK70 (small asteroid, arc=5 days, H=25.3 ~29m) from Klet Obs. (Feb. 13.99p7)
K08A04F 2008 AF4 (arc=35 days, H=19.7 ~389m) from Klet Obs. (Feb. 9.89-90p6)
Observations of recently (no longer) risk-listed objects
K08C22D 2008 CD22 (almost small, arc=5 days, H=21.9 ~141m) from Stia Obs. (Feb. 13.79-80p4) and the Catalina Sky Survey (CSS) (Feb. 14.23-24p4)
K08B15D 2008 BD15 (arc=15 days, H=20.6 ~257m) from Klet Obs. (Feb. 9.87p5)
Observations of small asteroids (H>22.0)
K08CB6N 2008 CN116 (arc=3 days, H=26.6 ~16m) from Great Shefford Obs. (Feb. 13.81-84p3)
K08CB6K 2008 CK116 (arc=3 days, H=23.4 ~71m) from Great Shefford Obs. (Feb. 12.89-92p2)
K08C70D 2008 CD70 (arc=5 days, H=27.2 ~12m) from Great Shefford Obs. (Feb. 13.85-86p3)
K08C20L 2008 CL20 (arc=4 days, H=25.3 ~29m) from Klet Obs. (Feb. 9.92p8)
K08C00P 2008 CP (arc=12 days, H=24.1 ~51m) from Klet Obs. (Feb. 9.84p5)
Observations of almost-small asteroids (21.7<H<=22.0)
K08C06C 2008 CC6 (q=0.282 AU, arc=7 days, H=21.9 ~141m) from Tiki Obs. (Feb. 11.50p1 & 11.56-59p2)
Observations of other objects
K08CB6S 2008 CS116 (Q=4.558 AU, arc=93 days, H=20.8 ~234m) from CSS (Feb. 14.39-41p4)
K08C70N 2008 CN70 (arc=5 days, H=19.1 ~513m) from the Siding Spring Survey (SSS) (Feb. 14.43p1)
K08C70J 2008 CJ70 (arc=11 days, H=21.4 ~178m) from the Spacewatch 0.9m telescope (Feb. 12.18-21p3)
K08C05E 2008 CE5 (q=0.344 AU, arc=6 days, H=20.5 ~269m) from the Mt. Lemmon Survey (MLS) (Feb. 13.21-22p4)
K08C01N 2008 CN1 (arc=12 days, H=20.7 ~245m) from Klet Obs. (Feb. 9.97p5), Stia Obs. (Feb. 13.94-95p4), and CSS (Feb. 14.36-38p4)
K08C01L 2008 CL1 (arc=12 days, H=19.1 ~513m) from Klet Obs. (Feb. 13.09-10p7) and Stia Obs. (Feb. 13.96p4)
K08C00H 2008 CH (arc=11 days, H=20.5 ~269m) from Klet Obs. (Feb. 9.99p5)
K08A26U 2008 AU26 (arc=44 days, H=21.0 ~214m) from Spacewatch 0.9m (Feb. 12.18-21p3)
K08A00E 2008 AE (arc=2 opp, H=19.6 ~407m) from Klet Obs. (Feb. 9.95-96p5) and Stia Obs. (Feb. 13.92-93p4)
K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from Klet Obs. (Feb. 9.90-91p5)
K07T24U 2007 TU24 (arc=123 days, H=20.6 ~257m) from Klet Obs. (Feb. 9.96p6)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from Klet Obs. (Feb. 9.82p5)
K05E70K 2005 EK70 (arc=4 opp, H=17.5 ~1.07 km) from Balzaretto Obs. (Feb. 13.91-92p3)
K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from Klet Obs. (Feb. 10.02-03p6)
K03E16E 2003 EE16 (arc=4 opp, H=19.8 ~371m) from Klet Obs. (Feb. 10.01p6)
K03D04N 2003 DN4 (i=36.3°, arc=2 opp, H=19.5 ~426m) from CSS (Feb. 14.45-47p4)
K02C26F 2002 CF26 (arc=5 opp, H=17.1 ~1.29 km) from Klet Obs. (Feb. 10.01-02p8) and CSS (Feb. 14.31-33p4)
J89A00Z 1989 AZ (arc=3 opp, H=19.6 ~407m) from Klet Obs. (Feb. 9.80-81p6)
H5189 175189 2005 EC224 from Inastars Obs. (Feb. 14.93-96p5)
H0891 170891 2004 TY16 from Balzaretto Obs. (Feb. 13.88p3)
G2510 162510 2000 QW69 from CSS (Feb. 14.48-50p4)
G2038 162038 1996 DH from Goodricke-Pigott Obs. (Feb. 13.27-29p3)
F3591 153591 2001 SN263 from Balzaretto Obs. (Feb. 13.85-86p5)
68359 68359 2001 OZ13 from Ametlla del Valles Obs. (Feb. 11.81-83p8)
40267 40267 1999 GJ4 from CSS (Feb. 14.36-38p4)
35107 35107 1991 VH from CSS (Feb. 14.51-53p4)
11398 11398 1998 YP11 from Naef Obs. (Feb. 14.97-99p3)
03288 3288 Seleucus (1982 DV) from Goodricke-Pigott Obs. (Feb. 13.18-19p2)
01864 1864 Daedalus (1971 FA) from Goodricke-Pigott Obs. (Feb. 13.40-43p3)

MPEC 2008-C105 - "03:53 UT" - 2008 CK119

K08CB9K 2008 CK119 (small asteroid, H=24.5 ~43m) was discovered at 0513 UT on 13 Feb. by LINEAR, which observed it at Feb. 13.22-27p5. The discovery was confirmed by ARO (Feb. 14.27p3), Gnosca Obs. (Feb. 14.86-88p2), and New Millennium Obs. (Feb. 14.89-91p8).

MPEC 2008-C104 - "03:44 UT" - 2008 CJ119

K08CB9J 2008 CJ119 (borderline-small, H=21.8 ~148m) was discovered at 0408 UT on 13 Feb. by LINEAR, which observed it at Feb. 13.17-20p3. The discovery was confirmed by MLS (Jan. 1.47-50p4), ARO (Feb. 14.22-26p4), and San Marcello Pistoiese Obs. (Feb. 14.75-79p4).

Observers on 15 February '08

Eighteen observing facilities appear in today's MPECs.

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-C106 -- 68359
`H55`	Astronomical Research Obs. (ARO) in Illinois, 3 in MPECs 2008-C104, 2008-C105 & 2008-C106 -- 2008 CK119, 2008 CJ119, 2008 CC119
`A81`	Balzaretto Obs. in Italy, 3 in MPEC 2008-C106 -- 2005 EK70, 170891, 153591
`703`	Catalina Sky Survey (CSS) in Arizona, 8 in MPEC 2008-C106 -- 2008 CS116, 2008 CN1, 2008 CD22, 2003 DN4, 2002 CF26, 40267, 35107, 162510
`143`	Gnosca Obs. in Switzerland, 1 in MPEC 2008-C105 -- 2008 CK119
`683`	Goodricke-Pigott Obs. in Arizona, 3 in MPEC 2008-C106 -- 162038, 3288, 1864
`J95`	Great Shefford Obs. in England, 3 in MPEC 2008-C106 -- 2008 CN116, 2008 CK116, 2008 CD70
`B15`	Inastars Obs. in Germany, 1 in MPEC 2008-C106 -- 175189
`046`	Klet Obs. in the Czech Republic, 16 in MPEC 2008-C106 -- 2008 CP, 2008 CN1, 2008 CL20, 2008 CL1, 2008 CK70, 2008 CH, 2008 BD15, 2008 AF4, 2008 AE, 2007 YK, 2007 TU24, 2005 TU45, 2005 BE2, 2003 EE16, 2002 CF26, 1989 AZ
`704`	LINEAR in New Mexico, 2 in MPECs 2008-C104 & 2008-C105 -- 2008 CK119, 2008 CJ119
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-C104 & 2008-C106 -- 2008 CJ119, 2008 CE5
`A13`	Naef Obs. in Switzerland, 1 in MPEC 2008-C106 -- 11398
`A24`	New Millennium Obs. in Italy, 1 in MPEC 2008-C105 -- 2008 CK119
`104`	San Marcello Pistoiese Obs. in Italy, 1 in MPEC 2008-C104 -- 2008 CJ119
`E12`	Siding Spring Survey in New South Wales, 1 in MPEC 2008-C106 -- 2008 CN70
`691`	Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-C106 -- 2008 CJ70, 2008 AU26
`A78`	Stia Obs. in Italy, 4 in MPEC 2008-C106 -- 2008 CN1, 2008 CL1, 2008 CD22, 2008 AE
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-C106 -- 2008 CC6

Impact Risk Monitoring on 15 February '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 1659 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 CG119	NEODyS	1512	2041	1	2.29e-11	-6.85	-6.85	0	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/02/13.428 to 2008/02/14.434."

2008 CC119	JPL Sentry	1511	R E M O V E D						JPL: Risk listing removed at 1127 UTC.

2008 CR118	NEODyS	1512	2017-2089	40	6.1e-07	-3.21	-3.97	0	NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2008/02/10.352 to 2008/02/13.350."

2008 CK70	NEODyS	1512	2030-2044	4	2.77e-04	-3.17	-3.17	0	NEODyS: "Based on 73 optical observations (of which 0 are rejected as outliers) from 2008/02/09.342 to 2008/02/13.995."
2008 CK70	JPL Sentry	1511	2030	1	2.8e-04	-3.16	-3.16	0	JPL: "Analysis based on 73 observations spanning 4.6530 days (2008-Feb-09.34106 to 2008-Feb-13.99407)." Diameter approximately 0.032 km. from mean, weighted H=25.1.

2008 AF4	JPL Sentry	1511	2078-2101	24	2.1e-05	-2.37	-2.61	0	JPL: "Analysis based on 507 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	1511	2078-2090	9	1.33e-05	-2.55	-2.62	0	NEODyS: "Based on 511 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/13.928."

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 15 February '08

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

1512	Noted that NEODyS has updated its 2008 CK70 risk assessment - see above
1511	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 removed 2008 CC119 as an impact risk - see above Noted that NEODyS has posted 2008 CG119 as an impact risk - see above Noted that JPL Sentry has updated its 2008 CK70 risk assessment - see above Noted that NEODyS has posted 2008 CR118 as an impact risk - see above Grabbed MPEC 2008-C106 - Daily Orbit Update - see above
0554	Grabbed MPEC 2008-C104 - 2008 CJ119 - see above Grabbed MPEC 2008-C105 - 2008 CK119 - see above

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