2008-03-08 Tracking News

Contents on 8 March '08

IAU Minor Planet Center
- NEOCP Activity -- 16 listings: 5 new, 11 updated
- New MPECs -- five MPECs
Observers -- 20 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 8 March '08

The MPC's NEO Confirmation Page has 16 listings: 5 new, 11 updated

When last checked at 2354 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had five new and eleven updated listings. Of these, ten were "one nighters." So far The Tracking News has counted a total of 20 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 March '08

Minor Planet Electronic Circulars

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

MPEC 2008-E66 time-stamped "07:09 UT" - Daily Orbit Update - see below
MPEC 2008-E67 time-stamped "16:54 UT" - 2008 EZ7 - see below
MPEC 2008-E68 time-stamped "17:10 UT" - 2008 EA8 - see below
MPEC 2008-E69 time-stamped "17:12 UT" - 2008 EB8 - see below
MPEC 2008-E70 time-stamped "23:31 UT" - Comet C/2008 E3 (Garradd)

MPEC 2008-E70 - "23:31 UT" - Comet C/2008 E3 (Garradd)

CK08E030 C/2008 E3 (i=106.6°, q=5.261 AU, TP=2008 Oct. 31.240 TT) from the Siding Spring Survey (SSS) (March 5.78-79p4 & 7.76-78p4) and RAS Obs. Moorook (March 8.76-77p2)

MPEC 2008-E69 - "17:12 UT" - 2008 EB8

K08E08B 2008 EB8 (small asteroid, H=22.6 ~102m) was discovered at 0906 UT on 6 March by the Mt. Lemmon Survey (MLS), which observed it at March 6.38-45p8 and 8.25-36p12.

MPEC 2008-E68 - "17:10 UT" - 2008 EA8

K08E08A 2008 EA8 (risk-listed, q=0.321 AU, Earth MOID=2.5 LD, H=22.3 ~117m) was discovered at 0603 UT on 6 March by MLS, which observed it at March 6.25-27p4, 6.36-37p3, and 8.23-29p8.

MPEC 2008-E67 - "16:54 UT" - 2008 EZ7

K08E07Z 2008 EZ7 (risk-listed, Earth MOID=0.4 LD, H=26.9 ~14m) was discovered at 1144 UT on 7 March by SSS, which observed it at March 7.49-62p17, 8.41p2, and 8.56p4. The discovery was confirmed by Great Shefford Obs. (March 7.89-91p4), McDonald Obs. (March 8.12-13p5), the Catalina Sky Survey (CSS) (March 8.17p4), Grasslands Obs. (March 8.19-20p3), and Mt. John Obs. (March 8.35-37p7, 8.42-43p5 & 8.49p6). This object is now within ten lunar distances (LD) of Earth, reaching 0.4 LD on 9 March (INTRUDER).

<< DOU on 8 Mar. '08 >> MPEC 2008-E66 - "07:09 UT" - Daily Orbit Update

Observations of risk-listed objects
K08E06N 2008 EN6 (arc=2 days, H=19.0 ~537m) from MLS (March 7.32p4)
K08E05E 2008 EE5 (i=44.8°, arc=4 days, H=19.1 ~513m) from the Spacewatch 1.8m telescope (March 8.14p3)
K08D04A 2008 DA4 (small asteroid, arc=8 days, H=23.9 ~56m) from Dave Balam via Plaskett 1.8m Telescope (March 6.20-24p5)
K08A04F 2008 AF4 (arc=58 days, H=19.7 ~389m) from Farpoint Obs. (March 8.20-22p2)
Observations of recently (no longer) risk-listed objects
K08E01K 2008 EK1 (i=39.2°, arc=3 days, H=20.3 ~295m) from Astronomical Research Obs. (ARO) (March 6.06p3) and MLS (March 7.25-26p3)
K08E00S 2008 ES (arc=5 days, H=18.2 ~776m) from Desert Moon Obs. (March 7.35-38p3)
K08D00V 2008 DV (arc=9 days, H=18.1 ~812m) from ARO (March 6.04-05p3)
K08CB9G 2008 CG119 (i=41.3°, arc=23 days, H=19.0 ~537m) from SSS (March 7.44p1)
K08CB9C 2008 CC119 (Q=4.010 AU, arc=15 days, H=18.5 ~676m) from David Tholen's team on Mauna Kea (Feb. 27.57-58p3)
K08C21Z 2008 CZ21 (arc=28 days, H=20.3 ~295m) from Spacewatch 1.8m (March 7.11-12p3)
K08C20M 2008 CM20 (arc=29 days, H=21.0 ~214m) from Spacewatch 1.8m (March 8.12-13p3)
K08B18T 2008 BT18 (arc=36 days, H=18.3 ~741m) from Desert Moon Obs. (March 7.14-16p3) and McDonald Obs. (March 7.22-24p3)
Observations of small asteroids (H>22.0)
K08E07P 2008 EP7 (arc=1 day, H=23.6 ~65m) from Junk Bond Obs. (March 7.26-33p4)
K08E00P 2008 EP (arc=5 days, H=24.3 ~47m) from LINEAR (March 7.28-32p5)
K08E00L 2008 EL (arc=24 days, H=22.4 ~112m) from Greiner Research Obs. (March 7.17-18p21)
K08B02V 2008 BV2 (arc=47 days, H=22.8 ~93m) from ARO (March 6.09-12p3 at V=22.0-22.1)
K05EG9Y 2005 EY169 (arc=2 opp, H=22.2 ~123m) from Desert Moon Obs. (March 7.18p3) and Great Shefford Obs. (March 7.93-94p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08E00F 2008 EF (arc=5 days, H=21.9 ~141m) from ARO (March 6.05-07p3 at V=22.1-3)
Observations of other objects
K08E07N 2008 EN7 (arc=1 day, H=20.4 ~282m) from Junk Bond Obs. (March 7.46-50p3)
K08E06P 2008 EP6 (arc=2 days, H=19.3 ~467m) from SSS (March 7.47p3)
K08E05Y 2008 EY5 (q=0.235 AU, arc=3 days, H=20.1 ~323m) from SSS (March 7.43-44p5)
K08E00J 2008 EJ (i=38.6°, arc=6 days, H=20.2 ~309m) from ARO (March 6.10-11p3)
K08D23H 2008 DH23 (arc=7 days, H=19.7 ~389m) from Desert Moon Obs. (March 7.41-48p3)
K08D00D 2008 DD (arc=18 days, H=20.4 ~282m) from Desert Moon Obs. (March 7.52p3)
K08C01N 2008 CN1 (arc=34 days, H=20.6 ~257m) from Greiner Research Obs. (March 7.21-22p9)
K08C01L 2008 CL1 (arc=34 days, H=19.5 ~426m) from Hamamatsu-Yuto Obs. (March 3.72-73p3 & 7.61p3) and Greiner Research Obs. (March 7.19-20p39)
K08C00M 2008 CM (i=36.0°, arc=34 days, H=17.1 ~1.29 km) from Desert Moon Obs. (March 7.10-12p3)
K07V04Q 2007 VQ4 (arc=3 opp, H=15.8 ~2.34 km, q=1.271 AU) from Greiner Research Obs. (March 7.29p4)
K07T08G 2007 TG8 (Q=4.306 AU, arc=176 days, H=18.6 ~645m) from Hamamatsu-Yuto Obs. (March 3.66-68p3) and LINEAR (March 7.27-32p5)
K07R09V 2007 RV9 (arc=179 days, H=20.1 ~323m) from LINEAR (March 7.39-43p5)
K06D62U 2006 DU62 (arc=3 opp, H=18.0 ~851m) from CSS (March 7.18-19p4)
K05E70K 2005 EK70 (arc=4 opp, H=17.4 ~1.12 km) from Hamamatsu-Yuto Obs. (March 3.52-54p6, 4.50p3 & 7.50-53p5)
K05E00A 2005 EA (arc=2 opp, H=21.0 ~214m) from Desert Moon Obs. (March 7.20p3)
K05B02E 2005 BE2 (arc=2 opp, H=18.2 ~776m) from Hamamatsu-Yuto Obs. (March 7.64-66p5)
K04H00W 2004 HW (Q=4.400 AU, arc=3 opp, H=17.2 ~1.23 km) from MLS (March 7.24-26p8)
K04D00C 2004 DC (arc=2 opp, H=18.2 ~776m) from McDonald Obs. (March 7.10-12p3)
K03E50D 2003 ED50 (arc=3 opp, H=20.8 ~234m) from Spacewatch 1.8m (March 7.21-22p3)
K03A18K 2003 AK18 (arc=3 opp, H=19.7 ~389m) from LINEAR (March 7.22-27p5)
K02T66D 2002 TD66 (arc=4 opp, H=20.3 ~295m) from Hamamatsu-Yuto Obs. (March 7.57-60p6)
K02C26F 2002 CF26 (arc=5 opp, H=17.2 ~1.23 km) from LINEAR (March 7.27-32p5)
K00DA7P 2000 DP107 (arc=4 opp, H=18.2 ~776m) from LINEAR (March 7.27-32p5)
G2173 162173 1999 JU3 from LINEAR (March 7.11-15p5)
G2038 162038 1996 DH from Jarnac Obs. (March 7.13-16p3)
F4347 154347 2002 XK4 from LINEAR (March 7.17-21p5)
F3591 153591 2001 SN263 from LINEAR (March 7.27-32p5)
E4922 144922 2005 CK38 from McDonald Obs. (March 7.19-21p3)
24443 24443 2000 OG from MLS (March 7.44-45p4)
09856 9856 1991 EE from LINEAR (March 7.44-50p5)
09400 9400 1994 TW1 from LINEAR (March 7.39-43p5)
06456 6456 Golombek (1992 OM) from SSS (March 7.63-67p4)
05836 5836 1993 MF from SSS (March 7.63-67p4)
01864 1864 Daedalus (1971 FA) from LINEAR (March 7.33-38p5)
01685 1685 Toro (1948 OA) from Wildberg Obs. (Feb. 17.81-83p5)

Observers on 8 March '08

A total of 20 observing facilities appear in today's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-E66 -- 2008 EK1, 2008 EJ, 2008 EF, 2008 DV, 2008 BV2
`703`	Catalina Sky Survey (CSS) in Arizona, 2 in MPECs 2008-E66 & 2008-E67 -- 2008 EZ7, 2006 DU62
`448`	Desert Moon Obs. in New Mexico, 7 in MPEC 2008-E66 -- 2008 ES, 2008 DH23, 2008 DD, 2008 CM, 2008 BT18, 2005 EY169, 2005 EA
`734`	Farpoint Obs. in Kansas, 1 in MPEC 2008-E66 -- 2008 AF4
`651`	Grasslands Obs. in Arizona, 1 in MPEC 2008-E67 -- 2008 EZ7
`J95`	Great Shefford Obs. in England, 2 in MPECs 2008-E66 & 2008-E67 -- 2008 EZ7, 2005 EY169
`H51`	Greiner Research Obs. in Wisconsin, 4 in MPEC 2008-E66 -- 2008 EL, 2008 CN1, 2008 CL1, 2007 VQ4
`379`	Hamamatsu-Yuto Obs. in Japan, 5 in MPEC 2008-E66 -- 2008 CL1, 2007 TG8, 2005 EK70, 2005 BE2, 2002 TD66
`G92`	Jarnac Obs. in Arizona, 1 in MPEC 2008-E66 -- 162038
`701`	Junk Bond Obs. in Arizona, 2 in MPEC 2008-E66 -- 2008 EP7, 2008 EN7
`704`	LINEAR in New Mexico, 12 in MPEC 2008-E66 -- 2008 EP, 2007 TG8, 2007 RV9, 2003 AK18, 2002 CF26, 2000 DP107, 162173, 154347, 153591, 9856, 9400, 1864
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-E66 -- 2008 CC119
`711`	McDonald Obs. in Texas, 4 in MPECs 2008-E66 & 2008-E67 -- 2008 EZ7, 2008 BT18, 2004 DC, 144922
`474`	Mt. John Obs. in New Zealand, 1 in MPEC 2008-E67 -- 2008 EZ7
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 6 in MPECs 2008-E66, 2008-E68 & 2008-E69 -- 2008 EN6, 2008 EK1, 2008 EB8, 2008 EA8, 2004 HW, 24443
`6581`	Dave Balam via Plaskett 1.8m Telescope in British Columbia, 1 in MPEC 2008-E66 -- 2008 DA4
`D90`	RAS Obs. Moorook in South Australia, 1 in MPEC 2008-E70 -- C/2008 E3
`E12`	Siding Spring Survey (SSS) in New South Wales, 7 in MPECs 2008-E66, 2008-E67 & 2008-E70 -- 2008 EZ7, 2008 EY5, 2008 EP6, C/2008 E3, 2008 CG119, 6456, 5836
`291`	Spacewatch 1.8m telescope in Arizona, 4 in MPEC 2008-E66 -- 2008 EE5, 2008 CZ21, 2008 CM20, 2003 ED50
`198`	Wildberg Obs. in Germany, 1 in MPEC 2008-E66 -- 1685

Impact Risk Monitoring on 8 March '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 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 EA8	JPL Sentry	2307	2041-2088	4	6.6e-08	-5.67	-5.68	0	JPL: "Analysis based on 15 observations spanning 2.0380 days (2008-Mar-06.25228 to 2008-Mar-08.29028)." Diameter approximately 0.130 km. from mean, weighted H=22.1.

2008 EZ7	JPL Sentry	1940	2086	1	9.3e-09	-9.22	-9.22	0	JPL: "Analysis based on 57 observations spanning 1.0728 days (2008-Mar-07.48916 to 2008-Mar-08.562)." Diameter approximately 0.014 km. from mean, weighted H=26.8.

2008 EO7	NEODyS	1549	2008-2084	42	2.65e-09	-4.06	-4.09	0	NEODyS: "Based on 9 optical observations (of which 0 are rejected as outliers) from 2008/03/06.299 to 2008/03/07.377."

2008 EM7	NEODyS	1550	2014-2090	57	3.72e-07	-4.09	-4.49	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/03/06.258 to 2008/03/07.354."

2008 EN6	JPL Sentry	1549	2042-2074	7	2.8e-09	-6.50	-7.05	0	JPL: "Analysis based on 22 observations spanning 1.9529 days (2008-Mar-05.37204 to 2008-Mar-07.32498)." Diameter approximately 0.280 km. from mean, weighted H=20.4.

2008 EE5	JPL Sentry	1549	R E M O V E D						JPL: Risk listing removed at 1115 UTC.

2008 DA4	JPL Sentry	1549	2100	1	2.6e-07	-6.35	-6.35	0	JPL: "Analysis based on 49 observations spanning 7.9619 days (2008-Feb-27.28072 to 2008-Mar-06.24262)." Diameter approximately 0.056 km. from mean, weighted H=23.9.

2008 AF4	NEODyS	1549	2078-2089	3	3.27e-05	-2.15	-2.15	1	NEODyS: "Based on 576 optical observations (of which 4 are rejected as outliers) from 2008/01/10.397 to 2008/03/08.221. NOTE: The Virtual Impactor in 2089/01/09.479 ... is rated as Torino Scale 1."

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 March '08

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

2354	Grabbed MPEC 2008-E70 - Comet C/2008 E3 (Garradd) - see above
2307	Noted that JPL Sentry has posted 2008 EA8 as an impact risk - see above
1940	Noted that JPL Sentry has posted 2008 EZ7 as an impact risk - see above
1736	Grabbed MPEC 2008-E67 - 2008 EZ7 - see above Grabbed MPEC 2008-E68 - 2008 EA8 - see above Grabbed MPEC 2008-E69 - 2008 EB8 - see above
1550	Grabbed MPEC 2008-E66 - Daily Orbit Update - see above
1549	Noted that NEODyS has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 DA4 risk assessment - see above Noted that JPL Sentry has removed 2008 EE5 as an impact risk - see above Noted that JPL Sentry has posted 2008 EN6 as an impact risk - see above
1548	Noted that NEODyS has posted 2008 EM7 as an impact risk - see above Noted that NEODyS has posted 2008 EO7 as an impact risk - see above

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