2008-04-08 Tracking News

Contents on 8 April '08

IAU Minor Planet Center
- NEOCP Activity -- 18 listings: 3 new, 15 updated
- New MPECs -- three MPECs
Observers -- seventeen 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 April '08

The MPC's NEO Confirmation Page has 18 listings: 3 new, 15 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and fifteen updated listings. Of these, eight were "one nighters." So far The Tracking News has counted a total of 24 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 April '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-G43 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2008-G44 time-stamped "16:22 UT" - Comets C/2007 L2, 2007 L3, 2007 L13, 2007 V4 (SOHO) - see below
MPEC 2008-G45 time-stamped "17:26 UT" - 2005 GC187

MPEC 2008-G45 - "17:26 UT" - 2005 GC187

K05GI7C 2005 GC187 (KBO, q=38.622 AU, Q=49.981 AU, H=7.1 ~129 km) from Las Campanas Obs. (2007 May 8.17p1 & 2007 May 8.25p1) and Lowell Obs. Anderson Mesa Station (April 5.30p1 at R=23.1 & 5.39p1)

MPEC 2008-G44 - "16:22 UT" - Comets C/2007 L2, 2007 L3, 2007 L13, 2007 V4 (SOHO)

CK07V040 C/2007 V4 from the HI1-B instrument (4) aboard STEREO-B (2007 Nov. 2.10p2, 2007 Nov. 2.18p2, 2007 Nov. 2.24-27p4, 2007 Nov. 2.32-41p8, 2007 Nov. 2.46-52p6, 2007 Nov. 2.57-60p4 & 2007 Nov. 2.66-77p10), the COR2-A instrument (5) aboard STEREO-A (2007 Nov. 3.11p2, 2007 Nov. 3.17p2 & 2007 Nov. 3.21-51p30), and the COR2-B instrument (5) aboard STEREO-B (2007 Nov. 3.34-44p12)
CK07L130 C/2007 L13 from STEREO-A/COR2-A (5) (2007 June 15.73-07p32)
CK07L030 C/2007 L3 from STEREO-B/COR2-B (5) (2007 June 6.71-78p8, 2007 June 7.01-57p56 & 2007 June 7.61-01p40) and STEREO-A/COR2-A (5) (2007 June 6.81-54p72, 2007 June 7.58-70p14 & 2007 June 7.77-14p38)
CK07L020 C/2007 L2 from STEREO-A/COR2-A (5) (2007 June 5.18-22p4, 2007 June 5.29p2, 2007 June 5.33p2, 2007 June 5.37-41p4, 2007 June 5.45p2, 2007 June 5.49p2, 2007 June 5.56-60p4, 2007 June 5.72p2, 2007 June 5.79p2, 2007 June 5.83p2, 2007 June 5.87p2, 2007 June 5.93-97p4 & 2007 June 6.02p2) and STEREO-B/COR2-B (5) (2007 June 5.19-30p12, 2007 June 5.34-42p10, 2007 June 5.46-49p4 & 2007 June 5.53-03p48)

<< DOU on 8 Apr. '08 >> MPEC 2008-G43 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08F07K 2008 FK7 (small asteroid, arc=7 days, H=23.1 ~81m) from the Spacewatch 1.8m telescope (April 7.47p3)
K08F06T 2008 FT6 (arc=9 days, H=17.5 ~1.07 km) from McDonald Obs. (April 7.37-39p3) and Spacewatch 1.8m (April 7.45-46p3)
K08F00N 2008 FN (i=44.8°, arc=11 days, H=18.4 ~708m) from Spacewatch 1.8m (April 7.40-41p3) and McDonald Obs. (April 7.43-44p3)
Observations of small asteroids (H>22.0)
K08G01F 2008 GF1 (arc=1 day, H=28.3 ~7m) from Great Shefford Obs. (April 6.99-00p3)
K08G00V 2008 GV (Q=4.401 AU, arc=3 days, H=23.2 ~78m) from Schiaparelli Obs. (April 5.93-94p3)
K08F00O 2008 FO (arc=10 days, H=23.2 ~78m) from Petit Jean Mtn. South Obs. (PJMSO) (April 6.31-32p4)
Observations of almost-small asteroids (21.7<H<=22.0)
K05G08Y 2005 GY8 (arc=2 opp, H=21.8 ~148m) from PJMSO (April 6.40-41p7 & 7.28-29p7)
Observations of other objects
K08G01E 2008 GE1 (arc=3 days, H=19.3 ~467m) from McDonald Obs. (April 7.34-36p3)
K08G00D 2008 GD (q=0.265 AU, arc=7 days, H=19.9 ~355m) from PJMSO (April 8.09-10p5)
K08F06Y 2008 FY6 (arc=7 days, H=20.2 ~309m) from Jim Young via Table Mtn. Obs. (April 6.22-23p3) and LINEAR (April 6.31-35p4)
K08F06U 2008 FU6 (arc=9 days, H=17.8 ~933m) from PJMSO (April 7.30-31p7)
K08E85M 2008 EM85 (arc=25 days, H=19.7 ~389m) from PJMSO (April 7.16-17p7 & 8.16-17p6)
K08E06P 2008 EP6 (arc=33 days, H=19.4 ~446m) from Mt. John Obs. (April 7.34p3)
K08E06O 2008 EO6 (arc=33 days, H=19.6 ~407m) from PJMSO (April 7.21-22p6)
K08E00S 2008 ES (Q=4.037 AU, arc=2 opp, H=18.3 ~741m) from PJMSO (April 8.12-13p6)
K08D05J 2008 DJ5 (arc=39 days, H=19.9 ~355m) from Desert Moon Obs. (April 7.17-25p3)
K08D00E 2008 DE (arc=55 days, H=19.4 ~446m) from PJMSO (April 7.25-27p6)
K08CB8Z 2008 CZ118 (arc=56 days, H=18.4 ~708m) from PJMSO (April 7.19-20p6 & 8.14-15p6)
K08B22C 2008 BC22 (arc=86 days, H=19.8 ~371m) from Schiaparelli Obs. (April 5.95-97p2)
K08A00E 2008 AE (arc=2 opp, H=19.8 ~371m) from PJMSO (April 7.22-24p6) and McDonald Obs. (April 7.31-32p3)
K07V07Y 2007 VY7 (arc=3 opp, H=19.5 ~426m) from McDonald Obs. (April 7.41-43p3)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.9 ~2.24 km, q=1.271 AU) from PJMSO (April 7.24-25p5) and Atlante Obs. (April 7.96-97p3)
K06U00A 2006 UA (arc=2 opp, H=20.1 ~323m) from PJMSO (April 7.18-19p5)
K06K89E 2006 KE89 (i=45.1°, q=0.211 AU, arc=4 opp, H=16.5 ~1.70 km) from McDonald Obs. (April 7.45-46p3)
K06B55G 2006 BG55 (arc=3 opp, H=18.4 ~708m) from PJMSO (April 7.17-18p5 & 8.15-16p5)
K05N07B 2005 NB7 (arc=3 opp, H=18.7 ~616m) from Schiaparelli Obs. (April 5.81p3)
K05C25V 2005 CV25 (arc=2 opp, H=19.5 ~426m) from Mt. John Obs. (April 7.38-39p4)
K04C02R 2004 CR2 (arc=2 opp, H=19.4 ~446m) from LINEAR (April 6.25-30p5) and the Spacewatch 0.9m telescope (April 7.14-17p3)
K03G00W 2003 GW (i=49.4°, arc=3 opp, H=16.7 ~1.55 km) from Schiaparelli Obs. (April 1.87-88p3) and PJMSO (April 8.08-09p6)
K02E11V 2002 EV11 (q=0.229 AU, arc=3 opp, H=20.0 ~339m) from McDonald Obs. (April 7.16-17p3)
K01H07Y 2001 HY7 (arc=4 opp, H=20.5 ~269m) from LINEAR (April 6.42-47p3)
K00DA7P 2000 DP107 (arc=6 opp, H=18.2 ~776m) from LINEAR (April 7.19-24p5) and PJMSO (April 8.07-08p6)
H5921 175921 2000 DM1 from the Catalina Sky Survey (CSS) (April 7.16-17p4)
G8318 168318 1989 DA from Desert Moon Obs. (April 7.11-14p3)
F4347 154347 2002 XK4 from McDonald Obs. (April 6.10-13p3)
F3591 153591 2001 SN263 from LINEAR (April 7.19-23p5) and CSS (April 7.24-26p4)
F2942 152942 2000 FN10 from PJMSO (April 8.05-07p5)
F2679 152679 1998 KU2 from LINEAR (April 6.36-39p4)
E2040 142040 2002 QE15 from CSS (April 7.38-39p4)
E1531 141531 2002 GB from PJMSO (April 7.28p5)
D8205 138205 2000 EZ148 from Spacewatch 0.9m (April 7.14-17p3) and LINEAR (April 7.25-29p5)
D7158 137158 1999 FB from PJMSO (April 7.20-21p5) and CSS (April 7.29-30p4)
D6874 136874 1998 FH74 from LINEAR (April 6.31-35p5)
D6618 136618 1994 CN2 from Spacewatch 0.9m (April 7.14-17p3)
89830 89830 2002 CE from PJMSO (April 8.11p5)
85236 85236 1993 KH from CSS (April 7.41-43p4)
68278 68278 2001 FC7 from Spacewatch 0.9m (April 7.46-49p3)
54686 54686 2001 DU8 from LINEAR (April 7.19-23p5)
41429 41429 2000 GE2 from LINEAR (April 6.24-29p5)
35107 35107 1991 VH from PJMSO (April 7.31-32p5)
34613 34613 2000 UR13 from LINEAR (April 7.13-17p4)
24445 24445 2000 PM8 from Spacewatch 0.9m (April 7.35-39p3)
18736 18736 1998 NU from LINEAR (April 6.12-15p3)
13553 13553 1992 JE from LINEAR (April 6.30-34p4)
07977 7977 1977 QQ5 from LINEAR (April 7.18-21p4)
06037 6037 1988 EG from LINEAR (April 6.19-24p5 & 7.19-24p5)
05646 5646 1990 TR from LINEAR (April 7.31-34p4)
05626 5626 1991 FE from LINEAR (April 7.36-41p5) and Spacewatch 0.9m (April 7.40-43p3)
05587 5587 1990 SB from CSS (April 7.16-18p3)
04503 4503 Cleobulus (1989 WM) from LINEAR (April 7.36-41p5)
01864 1864 Daedalus (1971 FA) from Eschenberg Obs. (April 7.79-80p7)

Observers on 8 April '08

Seventeen observing facilities appear in today's MPECs.

Code	Observer / observatory
`J51`	Atlante Obs. in the Canary Islands, 1 in MPEC 2008-G43 -- 2007 VQ4
`703`	Catalina Sky Survey (CSS) in Arizona, 6 in MPEC 2008-G43 -- 85236, 175921, 153591, 142040, 137158, 5587
`448`	Desert Moon Obs. in New Mexico, 2 in MPEC 2008-G43 -- 2008 DJ5, 168318
`151`	Eschenberg Obs. in Switzerland, 1 in MPEC 2008-G43 -- 1864
`J95`	Great Shefford Obs. in England, 1 in MPEC 2008-G43 -- 2008 GF1
`704`	LINEAR in New Mexico, 18 in MPEC 2008-G43 -- 2008 FY6, 2004 CR2, 2001 HY7, 2000 DP107, 54686, 41429, 34613, 18736, 153591, 152679, 138205, 136874, 13553, 7977, 6037, 5646, 5626, 4503
`304`	Las Campanas Obs. in Chile, 1 in MPEC 2008-G45 -- 2005 GC187
`688`	Lowell Obs. Anderson Mesa Station in Arizona, 1 in MPEC 2008-G45 -- 2005 GC187
`711`	McDonald Obs. in Texas, 8 in MPEC 2008-G43 -- 2008 GE1, 2008 FT6, 2008 FN, 2008 AE, 2007 VY7, 2006 KE89, 2002 EV11, 154347
`474`	Mt. John Obs. in New Zealand, 2 in MPEC 2008-G43 -- 2008 EP6, 2005 CV25
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 20 in MPEC 2008-G43 -- 2008 GD, 2008 FU6, 2008 FO, 2008 ES, 2008 EO6, 2008 EM85, 2008 DE, 2008 CZ118, 2008 AE, 2007 VQ4, 2006 UA, 2006 BG55, 2005 GY8, 2003 GW, 2000 DP107, 89830, 35107, 152942, 141531, 137158
`C495`	COR2-A instrument (5) aboard STEREO-A in heliocentric orbit leading Earth, 4 in MPEC 2008-G44 -- C/2007 V4, C/2007 L3, C/2007 L2, C/2007 L13
`C504`	HI1-B instrument (4) aboard STEREO-B in heliocentric orbit trailing Earth, 1 in MPEC 2008-G44 -- C/2007 V4
`C505`	COR2-B instrument (5) aboard STEREO-B in heliocentric orbit trailing Earth, 3 in MPEC 2008-G44 -- C/2007 V4, C/2007 L3, C/2007 L2
`204`	Schiaparelli Obs. in Italy, 4 in MPEC 2008-G43 -- 2008 GV, 2008 BC22, 2005 NB7, 2003 GW
`691`	Spacewatch 0.9m telescope in Arizona, 6 in MPEC 2008-G43 -- 2004 CR2, 68278, 24445, 138205, 136618, 5626
`291`	Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2008-G43 -- 2008 FT6, 2008 FN, 2008 FK7
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-G43 -- 2008 FY6

For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring on 8 April '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 risk-listed 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 GM2	JPL Sentry	2002	2070-2107	37	9.9e-06	-7.03	-7.71	0	JPL: "Analysis based on 34 observations spanning .91768 days (2008-Apr-06.41278 to 2008-Apr-07.33046)." Diameter approximately 0.007 km. from mean, weighted H=28.3.
2008 GM2	NEODyS	1635	2071-2090	22	1.48e-06	-7.73	-8.22	0	NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/04/06.414 to 2008/04/07.331."

2008 GJ	JPL Sentry	2258	R E M O V E D						JPL: Risk listing removed at 2211 UTC.

2008 FF5	JPL Sentry	1905	2029-2070	3	2.5e-07	-5.06	-5.11	0	JPL: "Analysis based on 50 observations spanning 7.9586 days (2008-Mar-28.32219 to 2008-Apr-05.28081)." Diameter approximately 0.081 km. from mean, weighted H=23.1.

2008 DB	JPL Sentry	1755	2046-2108	31	5.6e-05	-4.68	-4.77	0	JPL: "Analysis based on 63 observations spanning 24.274 days (2008-Feb-18.242 to 2008-Mar-13.516061)." Diameter approximately 0.025 km. from mean, weighted H=25.7.

2008 AF4	JPL Sentry	2158	2089-2100	7	1.8e-05	-2.44	-2.69	0	JPL: "Analysis based on 596 observations spanning 85.831 days (2008-Jan-10.39652 to 2008-Apr-05.22713)." Diameter approximately 0.390 km. from mean, weighted H=19.7.

2007 UW1	JPL Sentry	2158	2048-2107	91	7.6e-05	-3.40	-4.27	0	JPL: "Analysis based on 32 observations spanning 7.0807 days (2007-Oct-17.44246 to 2007-Oct-24.52312)." Diameter approximately 0.097 km. from mean, weighted H=22.7.

1999 SF10	JPL Sentry	2056	2080-2105	4	1.5e-06	-5.82	-6.21	0	JPL: "Analysis based on 49 observations spanning 9.2651 days (1999-Sep-30.16385 to 1999-Oct-09.42891)." Diameter approximately 0.053 km. from mean, weighted H=24.0.

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 April '08

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

2258	Noted that JPL Sentry has removed 2008 GJ as an impact risk - see above
2158	Noted that JPL Sentry has updated its 2007 UW1 risk assessment - see above Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
2056	Noted that JPL Sentry has updated its 1999 SF10 risk assessment - see above
2002	Noted that JPL Sentry has posted 2008 GM2 as an impact risk - see above
1905	Noted that JPL Sentry has updated its 2008 FF5 risk assessment - see above
1755	Noted that JPL Sentry has updated its 2008 DB risk assessment - see above Grabbed MPEC 2008-G45 - 2005 GC187 - see above
1634	Noted that NEODyS has posted 2008 GM2 as an impact risk - see above Grabbed MPEC 2008-G44 - Comets C/2007 L2, 2007 L3, 2007 L13, 2007 V4 (SOHO) - see above
1517	Grabbed MPEC 2008-G43 - Daily Orbit Update - see above

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