2008-06-04 Tracking News

Contents on 4 June '08

IAU Minor Planet Center
- NEOCP Activity -- four listings: 3 new, 1 updated
- New MPECs -- three MPECs
Observers -- eleven 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

NOTE: These news page will update less often and at sometimes irregular intervals from May 31st through approximately June 7th.

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 4 June '08

The MPC's NEO Confirmation Page has 4 listings: 3 new, 1 updated

When last checked at 2126 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had three new and one updated listings. Of these, three were "one nighters." The Tracking News counted a total of seven objects listed on the NEOCP at some point on this day.

New MPECs on 4 June '08

Minor Planet Electronic Circulars

There were three MPECs issued this day from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-L15 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2008-L16 time-stamped "18:00 UT" - 2008 LC2 - see below
MPEC 2008-L17 time-stamped "23:04 UT" - 2008 LG2

MPEC 2008-L17 - "23:04 UT" - 2008 LG2

K08L02G 2008 LG2 (small asteroid, Earth MOID=1.5 LD, H=25.1 ~32m) was discovered at 0737 UT on 3 June by LINEAR, which observed it at June 3.32-35p4 and 4.31-35p4. This object will be coming within ten lunar distances (LD) of Earth, reaching 9.1 LD on 13 June.

MPEC 2008-L16 - "18:00 UT" - 2008 LC2

K08L02C 2008 LC2 (small asteroid, Earth MOID=8.5 LD, H=23.8 ~59m) was discovered at 0712 UT on 3 June by the Mt. Lemmon Survey (MLS), which observed it at June 3.30-32p4 and 3.37-38p3. The discovery was confirmed by the Spacewatch 1.8m telescope (June 4.24p2).

<< DOU on 4 June '08 >> MPEC 2008-L15 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08L00D 2008 LD (small asteroid, arc=1 day, H=29.1 ~5m) from program code 6 via Faulkes Telescope North (June 3.43p4)
K08L00B 2008 LB (small asteroid, arc=2 days, H=25.8 ~23m) from Spacewatch 1.8m (June 3.27p2)
K08L00A 2008 LA (small asteroid, arc=3 days, H=23.2 ~78m) from Spacewatch 1.8m (June 3.20-21p3 & 4.15p3)
K08K11N 2008 KN11 (small asteroid, arc=4 days, H=23.1 ~81m) from Desert Moon Obs. (June 3.27-31p3) and Spacewatch 1.8m (June 3.31-32p3)
K08K06D 2008 KD6 (arc=5 days, H=19.5 ~426m) from Spacewatch 1.8m (June 3.42-43p3)
K08K05Z 2008 KZ5 (arc=6 days, H=19.9 ~355m) from Spacewatch 1.8m (June 3.29-30p3 & 4.17-18p2)
K08H04U 2008 HU4 (small asteroid, arc=34 days, H=28.4 ~7m) from Spacewatch 1.8m (June 3.37p2)
K08A04F 2008 AF4 (arc=131 days, H=19.7 ~389m) from David Tholen's team on Mauna Kea (April 22.26-27p4)
Observations of recently (no longer) risk-listed objects
K08K02X 2008 KX2 (small asteroid, arc=4 days, H=24.8 ~37m) from Faulkes North/code 6 (May 31.48-50p2)
K08J19V 2008 JV19 (arc=26 days, H=20.7 ~245m) from Spacewatch 1.8m (June 3.22-23p3)
K04X29M 2004 XM29 (small asteroid, arc=2 opp, H=22.9 ~89m) from the Spacewatch 0.9m telescope (June 1.20-22p2)
Observations of small asteroids (H>22.0)
K08L00C 2008 LC (arc=2 days, H=24.4 ~45m) from Spacewatch 1.8m (June 3.32-33p3)
K08K06C 2008 KC6 (arc=4 days, H=25.1 ~32m) from Spacewatch 0.9m (June 1.36-39p2)
K08K00S 2008 KS (arc=4 days, H=24.7 ~39m) from Spacewatch 0.9m (June 1.31-34p3)
K08GB0A 2008 GA110 (Q=4.496 AU, arc=47 days, H=22.1 ~129m) from Spacewatch 0.9m (May 31.32-35p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K07S06Q 2007 SQ6 (arc=2 opp, H=21.9 ~141m) from Spacewatch 1.8m (June 3.39p2)
Observations of other objects
K08K28V 2008 KV28 (arc=3 days, H=20.0 ~339m) from Spacewatch 1.8m (June 3.28-29p3)
K08K06E 2008 KE6 (arc=4 days, H=20.6 ~257m) from Astronomical Research Obs. (ARO) (June 2.38-39p4)
K08K02W 2008 KW2 (i=37.4°, arc=6 days, H=19.6 ~407m) from Desert Moon Obs. (June 3.24-25p3)
K08K02V 2008 KV2 (arc=6 days, H=21.5 ~170m) from Desert Moon Obs. (June 3.21-23p3)
K08K00Q 2008 KQ (arc=7 days, H=20.6 ~257m) from Spacewatch 1.8m (June 3.30-31p3) and Spacewatch 0.9m (June 3.39-43p3)
K08K00P 2008 KP (i=60.3°, q=0.231 AU, arc=7 days, H=18.8 ~589m) from Spacewatch 0.9m (June 3.17-21p3)
K08J30Z 2008 JZ30 (arc=20 days, H=18.7 ~616m) from Spacewatch 1.8m (June 3.45p3)
K08J20O 2008 JO20 (Q=5.290 AU, arc=26 days, H=17.2 ~1.23 km) from Desert Moon Obs. (June 3.14-16p2)
K08J19T 2008 JT19 (arc=27 days, H=20.0 ~339m) from Spacewatch 1.8m (June 3.25-26p2 at V=22.1)
K08H66E 2008 HE66 (arc=34 days, H=21.7 ~155m) from Desert Moon Obs. (June 3.34-36p3)
K08H04V 2008 HV4 (arc=32 days, H=19.5 ~426m) from Spacewatch 0.9m (June 1.17-21p3)
K07X16H 2007 XH16 (arc=178 days, H=19.7 ~389m) from LINEAR (June 3.33-36p4)
K07L00L 2007 LL (arc=2 opp, H=20.4 ~282m) from LINEAR (June 3.32-36p5)
K06W02Z 2006 WZ2 (arc=3 opp, H=16.8 ~1.48 km) from Tiki Obs. (June 3.57p1 & 3.63p1)
K05U05Y 2005 UY5 (arc=2 opp, H=18.3 ~741m) from Las Campanas Obs. (June 3.23-24p2)
K05T45U 2005 TU45 (arc=3 opp, H=17.1 ~1.29 km) from Petit Jean Mtn. South Obs. (PJMSO) (June 3.25p6) and LINEAR (June 3.33-35p3)
K05C41F 2005 CF41 (arc=2 opp, H=18.5 ~676m) from PJMSO (June 3.27-28p5)
K03N06Z 2003 NZ6 (arc=4 opp, H=19.0 ~537m) from Desert Moon Obs. (June 3.39-43p3)
K03F06Q 2003 FQ6 (arc=3 opp, H=21.0 ~214m) from Spacewatch 1.8m (June 3.43-44p3 at V=21.7-22.1)
G4184 164184 2004 BF68 from MLS (June 3.15-17p4)
F4453 154453 2003 CJ11 from Spacewatch 0.9m (May 30.18p1 & June 1.18-23p3)
F4278 154278 2002 TB9 from PJMSO (June 3.26-27p5)
89958 89958 2002 LY45 from Spacewatch 0.9m (June 2.29-33p3)
35107 35107 1991 VH from LINEAR (June 3.27-31p5)
31210 31210 1998 BX7 from Spacewatch 0.9m (June 2.30-34p3)
22099 22099 2000 EX106 from LINEAR (June 3.16-21p4)
08567 8567 1996 HW1 from LINEAR (June 3.32-37p5)

Observers on 4 June '08

Eleven observing facilities appeared in this day's MPECs.

Code	Observer / observatory
`H55`	Astronomical Research Obs. in Illinois, 1 in MPEC 2008-L15 -- 2008 KE6
`448`	Desert Moon Obs. in New Mexico, 6 in MPEC 2008-L15 -- 2008 KW2, 2008 KV2, 2008 KN11, 2008 JO20, 2008 HE66, 2003 NZ6
`F656`	program code 6 via Faulkes Telescope North in Hawaii, 2 in MPEC 2008-L15 -- 2008 LD, 2008 KX2
`704`	LINEAR in New Mexico, 7 in MPECs 2008-L15 & 2008-L17 -- 2008 LG2, 2007 XH16, 2007 LL, 2005 TU45, 35107, 22099, 8567
`304`	Las Campanas Obs. in Chile, 1 in MPEC 2008-L15 -- 2005 UY5
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-L15 -- 2008 AF4
`G96`	Mt. Lemmon Survey (MLS) in Arizona, 2 in MPECs 2008-L15 & 2008-L16 -- 2008 LC2, 164184
`H45`	Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-L15 -- 2005 TU45, 2005 CF41, 154278
`691`	Spacewatch 0.9m telescope in Arizona, 10 in MPEC 2008-L15 -- 2008 KS, 2008 KQ, 2008 KP, 2008 KC6, 2008 HV4, 2008 GA110, 2004 XM29, 89958, 31210, 154453
`291`	Spacewatch 1.8m telescope in Arizona, 15 in MPECs 2008-L15 & 2008-L16 -- 2008 LC2, 2008 LC, 2008 LB, 2008 LA, 2008 KZ5, 2008 KV28, 2008 KQ, 2008 KN11, 2008 KD6, 2008 JZ30, 2008 JV19, 2008 JT19, 2008 HU4, 2007 SQ6, 2003 FQ6
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-L15 -- 2006 WZ2

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

Impact Risk Monitoring on 4 June '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2126 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 LD	NEODyS	1925	2049-2090	41	3.99e-05	-6.60	-6.78	0	NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/06/02.292 to 2008/06/03.435."
2008 LD	JPL Sentry	1325	2049-2107	55	5.6e-05	-6.52	-6.83	0	JPL: "Analysis based on 19 observations spanning 1.1424 days (2008-Jun-02.29145 to 2008-Jun-03.433866)." Diameter approximately 0.005 km. from mean, weighted H=29.1.

2008 LB	NEODyS	1326	2051-2084	2	7.92e-08	-7.70	-7.75	0	NEODyS: "Based on 13 optical observations (of which 0 are rejected as outliers) from 2008/06/01.274 to 2008/06/03.270."
2008 LB	JPL Sentry	1325	2064-2101	4	8.4e-08	-7.65	-7.99	0	JPL: "Analysis based on 13 observations spanning 1.9961 days (2008-Jun-01.27329 to 2008-Jun-03.26936)." Diameter approximately 0.023 km. from mean, weighted H=25.9.

2008 LA	NEODyS	1925	2015-2088	163	2.82e-05	-3.62	-4.34	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/06/01.170 to 2008/06/04.154."
2008 LA	JPL Sentry	1325	2014-2107	168	2.7e-05	-3.62	-4.36	0	JPL: "Analysis based on 22 observations spanning 2.9844 days (2008-Jun-01.16922 to 2008-Jun-04.15364)." Diameter approximately 0.075 km. from mean, weighted H=23.3.

2008 KN11	NEODyS	1925	2037-2046	3	5.33e-07	-5.17	-5.33	0	NEODyS: "Based on 50 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/03.322."
2008 KN11	JPL Sentry	1325	2037-2046	4	5.5e-07	-5.16	-5.34	0	JPL: "Analysis based on 50 observations spanning 3.9864 days (2008-May-30.33435 to 2008-Jun-03.32077)." Diameter approximately 0.079 km. from mean, weighted H=23.2.

2008 KD6	NEODyS	1924	R E M O V E D						-
2008 KD6	JPL Sentry	1325	R E M O V E D						JPL: Risk listing removed at 0852 UTC.

2008 KZ5	JPL Sentry	1325	2026	1	6.0e-10	-6.46	-6.46	0	JPL: "Analysis based on 64 observations spanning 5.9501 days (2008-May-29.22802 to 2008-Jun-04.17809)." Diameter approximately 0.350 km. from mean, weighted H=19.9.
2008 KZ5	NEODyS	1924	R E M O V E D						-

2008 HU4	NEODyS	1925	2075-2088	5	4.08e-06	-7.40	-7.83	0	NEODyS: "Based on 65 optical observations (of which 0 are rejected as outliers) from 2008/04/30.325 to 2008/06/03.371."
2008 HU4	JPL Sentry	1325	2054	1	5.9e-08	-9.07	-9.07	0	JPL: "Analysis based on 65 observations spanning 34.046 days (2008-Apr-30.32444 to 2008-Jun-03.36995)." Diameter approximately 0.007 km. from mean, weighted H=28.4.

2008 AF4	JPL Sentry	1325	2096-2100	3	1.1e-06	-3.65	-3.86	0	JPL: "Analysis based on 606 observations spanning 130.92 days (2008-Jan-10.39652 to 2008-May-20.315005)." Diameter approximately 0.400 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 4 June '08

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

0056 6/5	Grabbed MPEC 2008-L17 - 2008 LG2 - see above
1925	Noted that NEODyS has updated its 2008 HU4 risk assessment - see above Noted that NEODyS has updated its 2008 KN11 risk assessment - see above Noted that NEODyS has updated its 2008 LA risk assessment - see above Noted that NEODyS has updated its 2008 LD risk assessment - see above
1924	Noted that NEODyS has removed 2008 KD6 as an impact risk - see above Noted that NEODyS has removed 2008 KZ5 as an impact risk - see above
1803	Grabbed MPEC 2008-L16 - 2008 LC2 - see above
1326	Noted that NEODyS has updated its 2008 LB risk assessment - see above
1325	Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above Noted that JPL Sentry has updated its 2008 HU4 risk assessment - see above Noted that JPL Sentry has removed 2008 KD6 as an impact risk - see above Noted that JPL Sentry has updated its 2008 KN11 risk assessment - see above Noted that JPL Sentry has updated its 2008 KZ5 risk assessment - see above Noted that JPL Sentry has updated its 2008 LA risk assessment - see above Noted that JPL Sentry has updated its 2008 LB risk assessment - see above Noted that JPL Sentry has updated its 2008 LD risk assessment - see above Grabbed MPEC 2008-L15 - Daily Orbit Update - see above

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