2008-06-22 Tracking News

Contents on 22 June '08

IAU Minor Planet Center
- NEOCP Activity -- none
- New MPECs -- one MPEC
Observers -- eleven 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 22 June '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (last checked at 2357 UTC).

New MPECs on 22 June '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

<< DOU on 22 June '08 >> MPEC 2008-M23 - "06:06 UT" - Daily Orbit Update

Observations of risk-listed objects
K08L16W 2008 LW16 (arc=6 days, H=19.8 ~371m) from Astronomical Research Obs. (ARO) (June 21.26-28p3)
K08L16V 2008 LV16 (arc=7 days, H=20.1 ~323m) from ARO (June 21.28p3) and Guidestar Obs. (June 21.96-98p3)
K08L02G 2008 LG2 (small asteroid, arc=18 days, H=25.2 ~31m) from David Tholen's team on Mauna Kea (June 8.43p1) and ARO (June 21.16p1)
K08L00A 2008 LA (small asteroid, arc=20 days, H=23.2 ~78m) from ARO (June 21.13-14p3)
K08K11N 2008 KN11 (small asteroid, arc=22 days, H=23.2 ~78m) from ARO (June 21.15p3)
Observations of recently (no longer) risk-listed objects
K08L08W 2008 LW8 (arc=13 days, H=17.2 ~1.23 km) from Guidestar Obs. (June 21.99-02p3)
K08K06D 2008 KD6 (arc=21 days, H=19.7 ~389m) from ARO (June 19.29-30p3)
K08K05Z 2008 KZ5 (arc=23 days, H=20.0 ~339m) from ARO (June 21.21-22p3)
Observations of small asteroids (H>22.0)
K08L02H 2008 LH2 (arc=17 days, H=24.5 ~43m) from ARO (June 21.17-19p3)
K08E07Q 2008 EQ7 (arc=107 days, H=22.6 ~102m) from ARO (June 21.15-17p3)
Observations of other objects
K08L16Q 2008 LQ16 (arc=7 days, H=20.3 ~295m) from ARO (June 21.24p3)
K08K28V 2008 KV28 (arc=21 days, H=20.5 ~269m) from ARO (June 21.11-13p3)
K08K02W 2008 KW2 (i=37.4°, arc=24 days, H=19.7 ~389m) from ARO (June 21.18-19p3)
K08K00Q 2008 KQ (arc=25 days, H=20.6 ~257m) from ARO (June 21.13-15p3)
K08J35T 2008 JT35 (Q=4.083 AU, arc=47 days, H=21.1 ~204m) from ARO (June 21.23p4) and Atlante Obs. (June 21.98-99p3)
K08J26R 2008 JR26 (arc=39 days, H=19.9 ~355m) from ARO (June 21.20-21p3)
K08H66E 2008 HE66 (arc=52 days, H=21.7 ~155m) from ARO (June 21.20-22p3)
K08H03S 2008 HS3 (arc=52 days, H=21.7 ~155m) from ARO (June 21.24-25p3)
K05T45U 2005 TU45 (arc=3 opp, H=17.1 ~1.29 km) from Naef Obs. (June 21.89-91p2) and Capannoli Obs. (June 22.01-02p2)
K05T45G 2005 TG45 (IEO, Q=0.935 AU, arc=2 opp, H=17.5 ~1.07 km) from Guidestar Obs. (June 22.03-04p3)
K01W25A 2001 WA25 (arc=3 opp, H=18.6 ~645m) from Tiki Obs. (June 21.34p1 & 21.38p1)
K00M01U 2000 MU1 (arc=5 opp, H=19.8 ~371m) from Alter Satzberg Obs. (June 21.85-87p3) and Guidestar Obs. (June 21.93-95p3)
08567 8567 1996 HW1 from Linceo Obs. (June 21.07-09p3), Atlante Obs. (June 22.05-06p3), and Iluro Obs. (June 22.11p3)
07889 7889 1994 LX from Linceo Obs. (June 20.98-00p3) and Atlante Obs. (June 21.95-96p3)
07482 7482 1994 PC1 from Iluro Obs. (June 22.12-13p3)
07092 7092 Cadmus (1992 LC) from Thompsonville Obs. (June 21.17-18p6)
01917 1917 Cuyo (1968 AA) from Naef Obs. (June 21.94-97p2)

Observers on 22 June '08

Eleven observing facilities appear in today's MPEC.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 1 in MPEC 2008-M23 -- 2000 MU1
`H55`	Astronomical Research Obs. (ARO) in Illinois, 17 in MPEC 2008-M23 -- 2008 LW16, 2008 LV16, 2008 LQ16, 2008 LH2, 2008 LG2, 2008 LA, 2008 KZ5, 2008 KW2, 2008 KV28, 2008 KQ, 2008 KN11, 2008 KD6, 2008 JT35, 2008 JR26, 2008 HS3, 2008 HE66, 2008 EQ7
`J51`	Atlante Obs. in the Canary Islands, 3 in MPEC 2008-M23 -- 2008 JT35, 8567, 7889
`B09`	Capannoli Obs. in Italy, 1 in MPEC 2008-M23 -- 2005 TU45
`A17`	Guidestar Obs. in Germany, 4 in MPEC 2008-M23 -- 2008 LW8, 2008 LV16, 2005 TG45, 2000 MU1
`B19`	Iluro Obs. in Spain, 2 in MPEC 2008-M23 -- 8567, 7482
`J59`	Linceo Obs. in Spain, 2 in MPEC 2008-M23 -- 8567, 7889
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-M23 -- 2008 LG2
`A13`	Naef Obs. in Switzerland, 2 in MPEC 2008-M23 -- 2005 TU45, 1917
`H53`	Thompsonville Obs. in Illinois, 1 in MPEC 2008-M23 -- 7092
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-M23 -- 2001 WA25

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

Impact Risk Monitoring on 22 June '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS and JPL at 2358 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 LW16	JPL Sentry	1434	R E M O V E D						JPL: Risk listing removed at 0851 UTC.

2008 LV16	NEODyS	1435	2061-2081	3	5.78e-09	-5.72	-5.86	0	NEODyS: "Based on 43 optical observations (of which 0 are rejected as outliers) from 2008/06/15.381 to 2008/06/21.982."
2008 LV16	JPL Sentry	1434	2032-2079	4	1.3e-08	-5.32	-5.62	0	JPL: "Analysis based on 43 observations spanning 6.6016 days (2008-Jun-15.3798 to 2008-Jun-21.98145)." Diameter approximately 0.350 km. from mean, weighted H=19.9.

2008 LG2	NEODyS	1435	2042-2085	12	7.41e-07	-6.59	-7.10	0	NEODyS: "Based on 107 optical observations (of which 0 are rejected as outliers) from 2008/06/03.318 to 2008/06/21.165."
2008 LG2	JPL Sentry	1434	2059-2108	16	6.3e-06	-5.71	-6.33	0	JPL: "Analysis based on 107 observations spanning 17.847 days (2008-Jun-03.31737 to 2008-Jun-21.164565)." Diameter approximately 0.030 km. from mean, weighted H=25.2.

2008 LA	NEODyS	1435	2058-2080	5	4.53e-05	-3.52	-3.52	0	NEODyS: "Based on 69 optical observations (of which 0 are rejected as outliers) from 2008/06/01.170 to 2008/06/21.145."
2008 LA	JPL Sentry	1434	2058-2107	5	4.6e-05	-3.51	-3.51	0	JPL: "Analysis based on 69 observations spanning 19.975 days (2008-Jun-01.16922 to 2008-Jun-21.144626)." Diameter approximately 0.078 km. from mean, weighted H=23.2.

2008 KN11	NEODyS	1435	2046	1	2.32e-07	-5.62	-5.62	0	NEODyS: "Based on 132 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/21.154."
2008 KN11	JPL Sentry	1434	2046	1	3.1e-07	-5.50	-5.50	0	JPL: "Analysis based on 132 observations spanning 21.819 days (2008-May-30.33435 to 2008-Jun-21.152984)." Diameter approximately 0.075 km. from mean, weighted H=23.3.

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 22 June '08

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

1435

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 LG2 risk assessment - see above
Noted that NEODyS has updated its 2008 LV16 risk assessment - see above

1434

Noted that JPL Sentry has updated its 2008 KN11 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 LG2 risk assessment - see above
Noted that JPL Sentry has updated its 2008 LV16 risk assessment - see above
Noted that JPL Sentry has removed 2008 LW16 as an impact risk - see above
Grabbed MPEC 2008-M23 - Daily Orbit Update - see above

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