2008-06-10 Tracking News

Contents on 10 June '08

IAU Minor Planet Center
- NEOCP Activity -- one listing: 1 updated
- New MPECs -- five MPECs
Observers -- 22 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

NOTE: These news pages will update less often and at irregular intervals through June 12th.

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 10 June '08

The MPC's NEO Confirmation Page has 1 listing: 1 updated

When last checked at 2318 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had one updated listing. This was a "one nighter." So far The Tracking News has counted a total of two 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 10 June '08

Minor Planet Electronic Circulars

As of last check at 2318 UTC, there have been five MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.

MPEC 2008-L41 time-stamped "01:24 UT" - 2007 NC7 - see below
MPEC 2008-L42 time-stamped "01:39 UT" - 2008 LW8 - see below
MPEC 2008-L43 time-stamped "03:52 UT" - 2003 OB4 - see below
MPEC 2008-L44 time-stamped "06:08 UT" - Daily Orbit Update - see below
MPEC 2008-L45 time-stamped "15:27 UT" - Comet P/1997 V1 = 2008 L1 (Larsen)

MPEC 2008-L45 - "15:27 UT" - Comet P/1997 V1 = 2008 L1 (Larsen)

PK08L010 P/2008 L1 (q=3.272 AU, Q=6.542 AU, TP=2008 Aug. 25.1744 TT) from the Spacewatch 1.8m telescope (June 9.44-46p3 & 10.44-45p3)
PJ97V010 P/1997 V1 (Larsen) (q=3.293 AU, Q=6.569 AU, TP=1997 Sept. 14.8599 TT)

<< DOU on 10 June '08 >> MPEC 2008-L44 - "06:08 UT" - Daily Orbit Update

Observations of risk-listed objects
K08L08W 2008 LW8 (arc=1 day, H=17.2 ~1.23 km) from Wildberg Obs. (June 10.01p4)
K08L02G 2008 LG2 (small asteroid, arc=7 days, H=25.4 ~28m) from Astronomical Research Obs. (ARO) (June 9.17p4), Spacewatch 1.8m (June 9.31p2), Alter Satzberg Obs. (June 9.86-89p5), and Great Shefford Obs. (June 9.96-97p3)
K08L00A 2008 LA (small asteroid, arc=9 days, H=23.2 ~78m) from Spacewatch 1.8m (June 9.20-21p2) and Great Shefford Obs. (June 9.94-95p2)
K08K11N 2008 KN11 (small asteroid, arc=11 days, H=23.2 ~78m) from ARO (June 9.17-18p4), Spacewatch 1.8m (June 9.25-27p3), and Great Shefford Obs. (June 9.99-00p3)
K08J24O 2008 JO24 (arc=30 days, H=18.2 ~776m) from Kanab Obs. (June 9.39p1 & 9.44p1)
Observations of recently (no longer) risk-listed objects
K08K05Z 2008 KZ5 (arc=11 days, H=20.0 ~339m) from Spacewatch 1.8m (June 9.32-33p3)
Observations of small asteroids (H>22.0)
K08L02H 2008 LH2 (arc=6 days, H=24.7 ~39m) from Mt. John Obs. (June 9.57p6), Alter Satzberg Obs. (June 9.94-97p5), and Great Shefford Obs. (June 9.97-98p3)
K08L00C 2008 LC (arc=8 days, H=24.6 ~41m) from ARO (June 9.19-20p3) and Spacewatch 1.8m (June 9.29p3)
K08K06B 2008 KB6 (arc=11 days, H=24.3 ~47m) from Mt. John Obs. (June 9.39-41p28)
K08GB0E 2008 GE110 (arc=56 days, H=22.1 ~129m) from Spacewatch 1.8m (June 9.17-18p3)
Observations of almost-small asteroids (21.7<H<=22.0)
K08H66E 2008 HE66 (arc=41 days, H=21.8 ~148m) from Desert Moon Obs. (June 9.26-29p3) and Naef Obs. (June 9.89-91p2)
Observations of other objects
K08K28V 2008 KV28 (arc=9 days, H=20.2 ~309m) from Spacewatch 1.8m (June 9.22-23p3)
K08K02W 2008 KW2 (i=37.3°, arc=12 days, H=19.7 ~389m) from ARO (June 9.16p4)
K08K02V 2008 KV2 (arc=12 days, H=21.5 ~170m) from the Catalina Sky Survey (CSS) (June 9.21-23p4)
K08K00Q 2008 KQ (arc=13 days, H=20.6 ~257m) from Spacewatch 1.8m (June 9.23-24p3)
K08J35T 2008 JT35 (Q=4.076 AU, arc=36 days, H=21.1 ~204m) from ARO (June 9.11p3), Winer Obs. (June 9.22p1 & 9.28p1), and Great Shefford Obs. (June 9.91-92p3)
K08J14P 2008 JP14 (arc=40 days, H=19.4 ~446m) from Verona Obs. (June 9.89-91p4)
K08J00O 2008 JO (arc=38 days, H=18.3 ~741m) from Desert Moon Obs. (June 9.14-19p3)
K08J00F 2008 JF (arc=39 days, H=17.9 ~891m) from Desert Moon Obs. (June 9.22-24p3) and Tiki Obs. (June 9.32-36p3)
K08H02F 2008 HF2 (arc=43 days, H=19.6 ~407m) from CSS (June 9.26-29p4)
K08C06A 2008 CA6 (arc=160 days, H=20.7 ~245m) from Mt. John Obs. (June 9.67-69p5)
K08C01L 2008 CL1 (arc=128 days, H=19.5 ~426m) from Mt. John Obs. (June 9.33-35p6)
K08A33G 2008 AG33 (arc=2 opp, H=19.9 ~355m) from the Sloan Digital Sky Survey (SDSS) (2003 Oct. 23.27p2 at V=21.81-22.78) and Mt. John Obs. (June 9.73-74p3)
K07Y56Q 2007 YQ56 (arc=162 days, H=19.9 ~355m) from Mt. John Obs. (June 9.70-71p5)
K07V04Q 2007 VQ4 (arc=3 opp, H=16.2 ~1.95 km) from Verona Obs. (May 1.86-87p3)
K07G00G 2007 GG (Q=4.135 AU, arc=3 opp, H=17.6 ~1.02 km) from David Tholen's team on Mauna Kea (May 22.39-40p3 at R=23.0)
K05N01J 2005 NJ1 (arc=3 opp, H=18.6 ~645m) from Mt. John Obs. (June 9.60-61p6)
K05L42Z 2005 LZ42 from Mt. John Obs. (June 9.54-59p7)
K05C41F 2005 CF41 (arc=2 opp, H=18.5 ~676m) from CSS (June 9.38p3)
K03Y03O 2003 YO3 (arc=3 opp, H=18.7 ~616m) from the Mt. Lemmon Survey (MLS) (2005 Oct. 6.50-51p4) and Mt. John Obs. (June 9.62-63p3)
K01W02J 2001 WJ2 (arc=3 opp, H=19.8 ~371m) from Mt. John Obs. (June 9.65-66p8)
H3689 173689 2001 PK9 from Desert Moon Obs. (June 9.43-44p5)
G2186 162186 1999 OP3 from CSS (June 9.43-45p4)
D7170 137170 1999 HF1 from Mt. Tuffley Obs. (June 9.97p3)
85989 85989 1999 JD6 from CSS (June 9.23-26p4)
35107 35107 1991 VH from El Guijo Obs. (June 8.03-04p3) and Mt. Tuffley Obs. (June 9.98-99p3)
08567 8567 1996 HW1 from Naef Obs. (June 9.94-97p3)
07889 7889 1994 LX from Kiev Comet Station (June 4.95p3)
07092 7092 Cadmus (1992 LC) from Mt. Tuffley Obs. (June 9.95-96p3)
03288 3288 Seleucus (1982 DV) from Mt. Tuffley Obs. (June 9.94p3)
01980 1980 Tezcatlipoca (1950 LA) from CSS (June 9.21-23p4) and Mt. Tuffley Obs. (June 9.91-92p3)

MPEC 2008-L43 - "03:52 UT" - 2003 OB4

K03O04B 2003 OB4 (Q=4.516 AU, H=19.0 ~537m) from Great Shefford Obs. (June 9.04-05p3 & 9.92-93p3)

MPEC 2008-L42 - "01:39 UT" - 2008 LW8

K08L08W 2008 LW8 (risk-listed, Earth MOID=6.1 LD, H=17.3 ~1.17 km) was discovered at 0955 UT on 9 June by CSS, which observed it at June 9.41-47p7. The discovery was confirmed by Jim Young via Table Mtn. Obs. (June 9.45-47p4), Mt. John Obs. (June 9.76p4), and Modra Obs. (June 10.02p3).

MPEC 2008-L41 - "01:24 UT" - 2007 NC7

K07N07C 2007 NC7 (KBO, q=17.076 AU, Q=50.404 AU, H=8.5 ~67.6 km) from Mt. Palomar (2007 Aug. 20.20-24p2, 2007 Aug. 21.20p1, 2007 Aug. 21.24p1, June 7.42p1 & 9.41p1)

Observers on 10 June '08

A total of 22 observing facilities appear in today's MPECs.

Code	Observer / observatory
`B03`	Alter Satzberg Obs. in Austria, 2 in MPEC 2008-L44 -- 2008 LH2, 2008 LG2
`H55`	Astronomical Research Obs. (ARO) in Illinois, 5 in MPEC 2008-L44 -- 2008 LG2, 2008 LC, 2008 KW2, 2008 KN11, 2008 JT35
`703`	Catalina Sky Survey (CSS) in Arizona, 7 in MPECs 2008-L42 & 2008-L44 -- 2008 LW8, 2008 KV2, 2008 HF2, 2005 CF41, 85989, 162186, 1980
`448`	Desert Moon Obs. in New Mexico, 4 in MPEC 2008-L44 -- 2008 JO, 2008 JF, 2008 HE66, 173689
`J27`	El Guijo Obs. in Spain, 1 in MPEC 2008-L44 -- 35107
`J95`	Great Shefford Obs. in England, 6 in MPECs 2008-L43 & 2008-L44 -- 2008 LH2, 2008 LG2, 2008 LA, 2008 KN11, 2008 JT35, 2003 OB4
`682`	Kanab Obs. in Utah, 1 in MPEC 2008-L44 -- 2008 JO24
`585`	Kiev Comet Station in the Ukraine, 1 in MPEC 2008-L44 -- 7889
`5682`	David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-L44 -- 2007 GG
`118`	Modra Obs. in Slovakia, 1 in MPEC 2008-L42 -- 2008 LW8
`474`	Mt. John Obs. in New Zealand, 11 in MPECs 2008-L42 & 2008-L44 -- 2008 LW8, 2008 LH2, 2008 KB6, 2008 CL1, 2008 CA6, 2008 AG33, 2007 YQ56, 2005 NJ1, 2005 LZ42, 2003 YO3, 2001 WJ2
`G96`	Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-L44 -- 2003 YO3
`675`	Mt. Palomar in southern California, 1 in MPEC 2008-L41 -- 2007 NC7
`J93`	Mt. Tuffley Obs. in England, 5 in MPEC 2008-L44 -- 35107, 137170, 7092, 3288, 1980
`A13`	Naef Obs. in Switzerland, 2 in MPEC 2008-L44 -- 2008 HE66, 8567
`645`	Sloan Digital Sky Survey in New Mexico, 1 in MPEC 2008-L44 -- 2008 AG33
`291`	Spacewatch 1.8m telescope in Arizona, 9 in MPECs 2008-L44 & 2008-L45 -- 2008 LG2, 2008 LC, 2008 LA, P/2008 L1, 2008 KZ5, 2008 KV28, 2008 KQ, 2008 KN11, 2008 GE110
`6735`	Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-L42 -- 2008 LW8
`F85`	Tiki Obs. in Tahiti, 1 in MPEC 2008-L44 -- 2008 JF
`A48`	Verona Obs. in Italy, 2 in MPEC 2008-L44 -- 2008 JP14, 2007 VQ4
`198`	Wildberg Obs. in Germany, 1 in MPEC 2008-L44 -- 2008 LW8
`648`	Winer Obs. in Arizona, 1 in MPEC 2008-L44 -- 2008 JT35

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

Impact Risk Monitoring on 10 June '08

**Summary Risk Table for Risk Assessments Updated Today** (last checks: NEODyS at 2318 and JPL at 2319 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 LW8	NEODyS	1349	2013-2087	69	6.84e-08	-3.05	-3.55	0	NEODyS: "Based on 22 optical observations (of which 0 are rejected as outliers) from 2008/06/09.414 to 2008/06/10.025."
2008 LW8	JPL Sentry	1346	2013-2107	69	7.1e-08	-3.02	-3.36	0	JPL: "Analysis based on 22 observations spanning .61112 days (2008-Jun-09.41357 to 2008-Jun-10.02469)." Diameter approximately 1.200 km. from mean, weighted H=17.2.

2008 LG2	NEODyS	1349	2037-2087	13	3.14e-05	-4.89	-4.90	0	NEODyS: "Based on 67 optical observations (of which 0 are rejected as outliers) from 2008/06/03.318 to 2008/06/09.967."
2008 LG2	JPL Sentry	1346	2038-2105	19	3.4e-05	-4.89	-4.95	0	JPL: "Analysis based on 67 observations spanning 6.6489 days (2008-Jun-03.31737 to 2008-Jun-09.96626)." Diameter approximately 0.029 km. from mean, weighted H=25.4.

2008 LA	NEODyS	1349	2026-2088	29	4.1e-05	-3.65	-4.09	0	NEODyS: "Based on 42 optical observations (of which 0 are rejected as outliers) from 2008/06/01.170 to 2008/06/09.954."
2008 LA	JPL Sentry	1346	2027-2093	27	4.0e-05	-3.66	-4.09	0	JPL: "Analysis based on 42 observations spanning 8.7842 days (2008-Jun-01.16922 to 2008-Jun-09.95341)." Diameter approximately 0.075 km. from mean, weighted H=23.3.

2008 KN11	NEODyS	1347	2030-2046	4	6.3e-07	-5.10	-5.38	0	NEODyS: "Based on 78 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/10.000."
2008 KN11	JPL Sentry	1346	2037-2046	4	6.7e-07	-5.09	-5.40	0	JPL: "Analysis based on 78 observations spanning 10.665 days (2008-May-30.33435 to 2008-Jun-09.99962)." Diameter approximately 0.077 km. from mean, weighted H=23.2.

2008 JO24	JPL Sentry	2142	R E M O V E D						JPL #2 for the day: Risk listing removed at 1847 UTC.

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 10 June '08

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

2142	Noted that JPL Sentry has removed 2008 JO24 as an impact risk - see above Grabbed MPEC 2008-L45 - Comet P/1997 V1 = 2008 L1 (Larsen) - see above The NEOCP has become active
1349	Noted that NEODyS has updated its 2008 LA risk assessment - see above Noted that NEODyS has updated its 2008 LG2 risk assessment - see above
1347	Noted that NEODyS has updated its 2008 KN11 risk assessment - see above
1346	Noted that JPL Sentry has posted 2008 JO24 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 LA risk assessment - see above Noted that JPL Sentry has updated its 2008 LG2 risk assessment - see above Noted that JPL Sentry has posted 2008 LW8 as an impact risk - see above Noted that NEODyS has posted 2008 LW8 as an impact risk - see above Grabbed MPEC 2008-L43 - 2003 OB4 - see above Grabbed MPEC 2008-L44 - Daily Orbit Update - see above
0329	Grabbed MPEC 2008-L41 - 2007 NC7 - see above Grabbed MPEC 2008-L42 - 2008 LW8 - see above
0328	The NEOCP has become empty

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