2008-02-12 Tracking News

Contents on 12 February '08

IAU Minor Planet Center
- NEOCP Activity -- 25 listings: 4 new, 21 updated
- New MPECs -- three MPECs
- Observers -- 28 observing facilities
Impact Risk Monitoring -- nine 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 12 February '08

The MPC's NEO Confirmation Page has 25 listings: 4 new, 21 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had four new and 21 updated listings. Of these, eleven were "one nighters." So far The Tracking News has counted a total of 29 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 12 February '08

Minor Planet Electronic Circulars

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

MPEC 2008-C75 time-stamped "03:34 UT" - 2007 XV50 - see below
MPEC 2008-C76 time-stamped "04:32 UT" - 2008 CM74 - see below
MPEC 2008-C77 time-stamped "07:08 UT" - Daily Orbit Update

<< DOU on 12 Feb. '08 >> MPEC 2008-C77 - "07:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08C70K 2008 CK70 (small asteroid, arc=3 days, H=25.3 ~29m) from LINEAR (Feb. 11.27-32p9), Desert Moon Obs. (Feb. 11.39-41p3), and KLENOT (Feb. 12.03p4)
K08C22E 2008 CE22 (small asteroid, arc=3 days, H=26.4 ~18m) from Thierry Pauwels via Uccle Obs. (Feb. 10.98-00p8), LINEAR (Feb. 11.39-44p4), and the Spacewatch 1.8m telescope (Feb. 11.39-40p3 & 12.25p3)
K08C22B 2008 CB22 (arc=4 days, H=19.6 ~407m) from KLENOT (Feb. 12.05-06p6)
K08C21Z 2008 CZ21 (arc=4 days, H=20.5 ~269m) from Spacewatch 1.8m (Feb. 11.22-23p3 & 12.15-16p3)
K08C06B 2008 CB6 (small asteroid, arc=5 days, H=26.9 ~14m) from Spacewatch 1.8m (Feb. 12.22-23p3)
K08B16O 2008 BO16 (small asteroid, Q=4.464 AU, arc=13 days, H=22.8 ~93m) from Spacewatch 1.8m (Feb. 10.37-38p3 & 12.20-22p3)
K08A04F 2008 AF4 (arc=33 days, H=19.7 ~389m) from University Hills Obs. (Feb. 11.37-38p3), Petit Jean Mtn. South Obs. (PJMSO) (Feb. 11.38-39p6), Spacewatch 1.8m (Feb. 11.44-45p3), Klet Obs. (Feb. 11.94-95p6), and Atlante Obs. (Feb. 11.97-99p3)
Observations of recently (no longer) risk-listed objects
K08C22D 2008 CD22 (almost small, arc=3 days, H=22.0 ~135m) from Pauwels/Uccle (Feb. 10.95-97p6), LINEAR (Feb. 11.33-38p5), and Madonna di Dossobuono Obs. (Feb. 11.89-90p3)
K08C06E 2008 CE6 (small asteroid, arc=4 days, H=23.5 ~68m) from Spacewatch 1.8m (Feb. 11.46-48p3)
K08B18T 2008 BT18 (arc=11 days, H=18.5 ~676m) from PJMSO (Feb. 11.39p1), Eschenberg Obs. (Feb. 11.83p3), and Verona Obs. (Feb. 11.88-90p4)
K08B15D 2008 BD15 (arc=12 days, H=20.6 ~257m) from Eschenberg Obs. (Feb. 11.80p7)
K07Y56V 2007 YV56 (arc=43 days, H=21.0 ~214m) from Spacewatch 1.8m (Feb. 12.11-13p3 at V=22.2)
Observations of small asteroids (H>22.0)
K08C70L 2008 CL70 (arc=2 days, H=22.8 ~93m) from LINEAR (Feb. 11.27-33p9)
K08C70D 2008 CD70 (arc=3 days, H=27.2 ~12m) from LINEAR (Feb. 11.27-31p8), Desert Moon Obs. (Feb. 11.36-37p3), and Great Shefford Obs. (Feb. 12.02-03p3)
K08C20L 2008 CL20 (arc=4 days, H=25.3 ~29m) from Pauwels/Uccle (Feb. 11.01p6), LINEAR (Feb. 11.40-44p4), and Madonna di Dossobuono Obs. (Feb. 11.94-95p4)
K08C04Y 2008 CY4 (arc=6 days, H=22.4 ~112m) from Stia Obs. (Feb. 11.83-84p3)
K08C00P 2008 CP (arc=10 days, H=24.1 ~51m) from PJMSO (Feb. 11.37-38p6), Stia Obs. (Feb. 11.81p2), and Verona Obs. (Feb. 11.94p4)
K08C00G 2008 CG (arc=10 days, H=22.2 ~123m) from the Mt. Lemmon Survey (MLS) (Feb. 11.25-26p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K08C06C 2008 CC6 (q=0.277 AU, arc=4 days, H=22.0 ~135m) from LINEAR (Feb. 11.33-38p4)
Observations of other objects
K08C70N 2008 CN70 (arc=2 days, H=19.1 ~513m) from Junk Bond Obs. (Feb. 11.12-16p5)
K08C70J 2008 CJ70 (arc=8 days, H=21.4 ~178m) from MLS (Feb. 11.21-22p4)
K08C01N 2008 CN1 (arc=9 days, H=20.7 ~245m) from University Hills Obs. (Feb. 11.44-45p6)
K08C00H 2008 CH (arc=10 days, H=20.5 ~269m) from Desert Moon Obs. (Feb. 11.53-55p3)
K08B16H 2008 BH16 (arc=12 days, H=20.6 ~257m) from Stia Obs. (Feb. 11.79p5)
K08A33M 2008 AM33 (arc=27 days, H=21.3 ~186m) from MLS (Feb. 11.45-48p4)
K08A00E 2008 AE (arc=2 opp, H=19.6 ~407m) from PJMSO (Feb. 11.42-43p6)
K07Y01X 2007 YX1 (Q=4.542 AU, arc=2 opp, H=17.3 ~1.17 km) from the Catalina Sky Survey (CSS) (Feb. 11.11-13p4)
K07Y00K 2007 YK (arc=2 opp, H=17.6 ~1.02 km) from LINEAR (Feb. 11.27-31p9) and PJMSO (Feb. 11.35-36p6)
K07T24U 2007 TU24 (arc=123 days, H=20.6 ~257m) from University Hills Obs. (Feb. 11.42-43p6) and PJMSO (Feb. 11.44p5)
K07T08G 2007 TG8 (Q=4.306 AU, arc=151 days, H=18.6 ~645m) from University Hills Obs. (Feb. 11.41-42p6) and PJMSO (Feb. 11.45p5)
K07Q03E 2007 QE3 (Q=4.045 AU, arc=172 days, H=19.9 ~355m) from MLS (Feb. 10.43-47p4)
K06D62U 2006 DU62 (arc=3 opp, H=18.2 ~776m) from CSS (Feb. 11.41-42p3) and University Hills Obs. (Feb. 11.47-49p6)
K05T45U 2005 TU45 (arc=3 opp, H=17.0 ~1.35 km) from San Vito Obs. (Feb. 11.92-93p3)
K05E70K 2005 EK70 (arc=4 opp, H=17.5 ~1.07 km) from Atlante Obs. (Feb. 11.91-92p3) and San Vito Obs. (Feb. 11.91-92p3)
K04XG4P 2004 XP164 (arc=3 opp, H=17.5 ~1.07 km) from CSS (Feb. 11.15-17p4)
K04N09C 2004 NC9 (Q=4.194 AU, arc=3 opp, H=17.2 ~1.23 km) from CSS (Feb. 10.23-25p4)
K04A01R 2004 AR1 (arc=3 opp, H=19.8 ~371m) from Madonna di Dossobuono Obs. (Feb. 11.91p3)
K03W25C 2003 WC25 (arc=6 opp, H=16.8 ~1.48 km) from the Spacewatch 0.9m telescope (Feb. 11.18-22p3)
K03E16E 2003 EE16 (arc=4 opp, H=19.8 ~371m) from LINEAR (Feb. 11.33-38p5) and Spacewatch 0.9m (Feb. 11.34-38p3)
K02C26F 2002 CF26 (arc=5 opp, H=17.1 ~1.29 km) from CSS (Feb. 11.23-26p4)
K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from MLS (Feb. 11.34-36p4)
J98FD4X 1998 FX134 (arc=3 opp, H=18.6 ~645m) from MLS (Feb. 11.27-28p4)
J93T02Q 1993 TQ2 (arc=2 opp, H=20.0 ~339m) from CSS (Feb. 10.22-25p3) and Stia Obs. (Feb. 11.85-86p4)
H3561 173561 2000 YV137 from LINEAR (Feb. 11.23-26p4)
G2038 162038 1996 DH from Goodricke-Pigott Obs. (Feb. 10.28-30p3) and LINEAR (Feb. 11.39-44p4)
F3591 153591 2001 SN263 from Saint-Barthelemy Obs. (Feb. 11.73-76p21), Guidestar Obs. (Feb. 11.80-82p3), and Dark Roseanne Obs. (Feb. 12.03-05p4)
E4901 144901 2004 WG1 from CSS (Feb. 10.31-36p8 & 11.23-25p4)
E1432 141432 2002 CQ11 from MLS (Feb. 11.39-41p4)
D8175 138175 2000 EE104 from CSS (Feb. 10.32-34p4)
D8013 138013 2000 CN101 from LONEOS (Feb. 10.22-29p4)
96189 96189 1991 NT3 from LONEOS (Feb. 10.21-28p4) and LINEAR (Feb. 11.33-38p5)
85275 85275 1994 LY from CSS (Feb. 11.15-17p4)
68359 68359 2001 OZ13 from Ametlla del Valles Obs. (Feb. 10.83-88p12) and Bocholt Obs. (Feb. 11.75-79p8)
22099 22099 2000 EX106 from Spacewatch 0.9m (Feb. 11.24-28p3)
11398 11398 1998 YP11 from PJMSO (Feb. 11.41p5)
09400 9400 1994 TW1 from LINEAR (Feb. 11.40-45p5)
07092 7092 Cadmus (1992 LC) from CSS (Feb. 10.08-10p4)
05646 5646 1990 TR from MLS (Feb. 11.39-42p4)
05131 5131 1990 BG from LINEAR (Feb. 11.09-14p5) and Montana Blanca Obs. (Feb. 11.83-84p3)
04450 4450 Pan (1987 SY) from LONEOS (Feb. 10.20-27p4), Saint-Barthelemy Obs. (Feb. 11.77-81p15), Eschenberg Obs. (Feb. 11.81p7), and Madonna di Dossobuono Obs. (Feb. 11.92-93p3)
03691 3691 Bede (1982 FT) from MLS (Feb. 11.39-42p4)
03288 3288 Seleucus (1982 DV) from Goodricke-Pigott Obs. (Feb. 10.20-21p2) and LINEAR (Feb. 11.27-32p5)
01864 1864 Daedalus (1971 FA) from Goodricke-Pigott Obs. (Feb. 10.41-44p3)
01620 1620 Geographos (1951 RA) from PJMSO (Feb. 11.42p5)

MPEC 2008-C76 - "04:32 UT" - 2008 CM74

K08C74M 2008 CM74 (risk-listed, Earth MOID=0.6 LD, H=28.1 ~8m) was discovered at 0849 UT on 8 Feb. by the MLS, which observed it at Feb. 8.37-44p7 and 9.36-38p3. The discovery was confirmed by LINEAR (Feb. 11.33-38p4). This object is now within ten lunar distances (LD) of Earth, reaching 2.5 LD on 15 Feb.

MPEC 2008-C75 - "03:34 UT" - 2007 XV50

K07X50V 2007 XV50 (KBO, q=42.563 AU, Q=46.425 AU, H=5.0 ~339 km) was discovered at 0547 UT on 13 Dec. 2007 by Mt. Palomar, which observed it at Dec. 13.24p1, 13.29p1, 14.25p1, 14.29p1, 30.14p1, 30.19p1, 30.25p1, Jan. 10.10p1, 10.15p1, Feb. 1.12p1, and 1.21p1.

Observers on 12 February '08

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

Code	Observer / observatory
`B37`	Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-C77 -- 68359
`J51`	Atlante Obs. in the Canary Islands, 2 in MPEC 2008-C77 -- 2008 AF4, 2005 EK70
`B48`	Bocholt Obs. in Germany, 1 in MPEC 2008-C77 -- 68359
`703`	Catalina Sky Survey (CSS) in Arizona, 10 in MPEC 2008-C77 -- 2007 YX1, 2006 DU62, 2004 XP164, 2004 NC9, 2002 CF26, 1993 TQ2, 85275, 144901, 138175, 7092
`H98`	Dark Roseanne Obs. in Connecticut, 1 in MPEC 2008-C77 -- 153591
`448`	Desert Moon Obs. in New Mexico, 3 in MPEC 2008-C77 -- 2008 CK70, 2008 CH, 2008 CD70
`151`	Eschenberg Obs. in Switzerland, 3 in MPEC 2008-C77 -- 2008 BT18, 2008 BD15, 4450
`683`	Goodricke-Pigott Obs. in Arizona, 3 in MPEC 2008-C77 -- 162038, 3288, 1864
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-C77 -- 2008 CD70
`A17`	Guidestar Obs. in Germany, 1 in MPEC 2008-C77 -- 153591
`701`	Junk Bond Obs. in Arizona, 1 in MPEC 2008-C77 -- 2008 CN70
`246`	KLENOT in the Czech Republic, 2 in MPEC 2008-C77 -- 2008 CK70, 2008 CB22
`046`	Klet Obs. in the Czech Republic, 1 in MPEC 2008-C77 -- 2008 AF4
`704`	LINEAR in New Mexico, 16 in MPECs 2008-C76 & 2008-C77 -- 2008 CM74, 2008 CL70, 2008 CL20, 2008 CK70, 2008 CE22, 2008 CD70, 2008 CD22, 2008 CC6, 2007 YK, 2003 EE16, 96189, 173561, 162038, 9400, 5131, 3288
`699`	LONEOS in Arizona, 3 in MPEC 2008-C77 -- 96189, 138013, 4450
`560`	Madonna di Dossobuono Obs. in Italy, 4 in MPEC 2008-C77 -- 2008 CL20, 2008 CD22, 2004 AR1, 4450
`J46`	Montana Blanca Obs. in the Canary Islands, 1 in MPEC 2008-C77 -- 5131
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 10 in MPECs 2008-C76 & 2008-C77 -- 2008 CM74, 2008 CJ70, 2008 CG, 2008 AM33, 2007 QE3, 2000 DP107, 1998 FX134, 141432, 5646, 3691
`675`	Mt. Palomar in southern California, 1 in MPEC 2008-C75 -- 2007 XV50
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 9 in MPEC 2008-C77 -- 2008 CP, 2008 BT18, 2008 AF4, 2008 AE, 2007 YK, 2007 TU24, 2007 TG8, 11398, 1620
`B04`	Saint-Barthelemy Obs. in Italy, 2 in MPEC 2008-C77 -- 153591, 4450
`233`	San Vito Obs. in Italy, 2 in MPEC 2008-C77 -- 2005 TU45, 2005 EK70
`691`	Spacewatch 0.9m telescope in Arizona, 3 in MPEC 2008-C77 -- 2003 WC25, 2003 EE16, 22099
`291`	Spacewatch 1.8m telescope in Arizona, 7 in MPEC 2008-C77 -- 2008 CZ21, 2008 CE6, 2008 CE22, 2008 CB6, 2008 BO16, 2008 AF4, 2007 YV56
`A78`	Stia Obs. in Italy, 4 in MPEC 2008-C77 -- 2008 CY4, 2008 CP, 2008 BH16, 1993 TQ2
`0122`	Thierry Pauwels via Uccle Obs. in Belgium, 3 in MPEC 2008-C77 -- 2008 CL20, 2008 CE22, 2008 CD22
`G72`	University Hills Obs. in southern California, 5 in MPEC 2008-C77 -- 2008 CN1, 2008 AF4, 2007 TU24, 2007 TG8, 2006 DU62
`A48`	Verona Obs. in Italy, 2 in MPEC 2008-C77 -- 2008 CP, 2008 BT18

Impact Risk Monitoring on 12 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 CM74	NEODyS	1611	2072-2089	7	3.06e-07	-8.37	-8.48	0	NEODyS: "Based on 14 optical observations (of which 0 are rejected as outliers) from 2008/02/08.369 to 2008/02/11.379."
2008 CM74	JPL Sentry	0622	2084-2097	5	5.9e-07	-8.10	-8.16	0	JPL: "Analysis based on 14 observations spanning 3.0101 days (2008-Feb-08.36778 to 2008-Feb-11.37789)." Diameter approximately 0.008 km. from mean, weighted H=28.0.

2008 CC71	NEODyS	1611	2033-2086	67	9.33e-05	-3.96	-4.53	0	NEODyS: "Based on 15 optical observations (of which 0 are rejected as outliers) from 2008/02/09.397 to 2008/02/11.451."

2008 CK70	NEODyS	1611	2030-2032	3	1.82e-04	-3.34	-3.34	0	NEODyS: "Based on 48 optical observations (of which 0 are rejected as outliers) from 2008/02/09.342 to 2008/02/12.031."
2008 CK70	JPL Sentry	1610	2030-2032	2	1.9e-04	-3.33	-3.33	0	JPL: "Analysis based on 48 observations spanning 2.6897 days (2008-Feb-09.34106 to 2008-Feb-12.03072)." Diameter approximately 0.032 km. from mean, weighted H=25.1.

2008 CE22	JPL Sentry	1610	R E M O V E D						JPL: Risk listing removed at 1052 UTC.

2008 CB22	JPL Sentry	1610	R E M O V E D						JPL: Risk listing removed at 1302 UTC.

2008 CZ21	JPL Sentry	1610	R E M O V E D						JPL: Risk listing removed at 1222 UTC.
2008 CZ21	NEODyS	1610	R E M O V E D

2008 CB6	JPL Sentry	1610	2066-2107	6	4.7e-06	-6.67	-6.73	0	JPL: "Analysis based on 29 observations spanning 4.9389 days (2008-Feb-07.29202 to 2008-Feb-12.2309)." Diameter approximately 0.013 km. from mean, weighted H=27.0.
2008 CB6	NEODyS	1610	R E M O V E D

2008 BO16	NEODyS	1611	2045	1	8.26e-07	-4.54	-4.54	0	NEODyS: "Based on 55 optical observations (of which 3 are rejected as outliers) from 2008/01/30.382 to 2008/02/12.218."
2008 BO16	JPL Sentry	1610	2045	1	5.5e-07	-4.72	-4.72	0	JPL: "Analysis based on 54 observations spanning 12.836 days (2008-Jan-30.38083 to 2008-Feb-12.21702)." Diameter approximately 0.090 km. from mean, weighted H=22.9.

2008 AF4	NEODyS	1611	2078-2090	17	1.18e-05	-2.59	-2.70	0	NEODyS: "Based on 480 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/02/11.988."
2008 AF4	JPL Sentry	1610	2078-2101	27	2.2e-05	-2.35	-2.70	0	JPL: "Analysis based on 476 observations spanning 32.591 days (2008-Jan-10.39652 to 2008-Feb-11.98771)." 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 12 February '08

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

1611	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 CK70 risk assessment - see above Grabbed MPEC 2008-C77 - Daily Orbit Update - see above
1610	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 removed 2008 CB22 as an impact risk - see above Noted that JPL Sentry has updated its 2008 CB6 risk assessment - see above Noted that NEODyS has removed 2008 CB6 as an impact risk - see above Noted that NEODyS has posted 2008 CC71 as an impact risk - see above Noted that JPL Sentry has removed 2008 CE22 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 CM74 as an impact risk - see above Noted that JPL Sentry has removed 2008 CZ21 as an impact risk - see above Noted that NEODyS has removed 2008 CZ21 as an impact risk - see above
0622	Noted that JPL Sentry has posted 2008 CM74 as an impact risk - see above
0504	Grabbed MPEC 2008-C76 - 2008 CM74 - see above
0337	Grabbed MPEC 2008-C75 - 2007 XV50 - see above

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