Contents  on 11 June '08

Resources:

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 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 11 June '08

The MPC's NEO Confirmation Page has 2 listings: 2 updated

When last checked at 1045 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two updated listings. Of these, one was a "one nighter."

New MPECs  on 11 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-L48 - "22:05 UT" - Comets C/2008 J7, 2008 J8, 2008 J9 (SOHO)


MPEC 2008-L47 - "21:42 UT" - Comets C/2008 H4, 2008 H5, 2008 H6, 2008 H7, 2008 H8 (SOHO)


<< DOU on 11 June '08 >>  MPEC 2008-L46 - "06:09 UT" - Daily Orbit Update

Observers  on 11 June '08

A total of 20 observing facilities appeared in this day's MPECs.

CodeObserver / observatory
A50Andrushivka Obs. in the Ukraine, 1 in MPEC 2008-L46 -- 2008 KB12
H55Astronomical Research Obs. (ARO) in Illinois, 2 in MPEC 2008-L46 -- 2008 LH2, 2008 KV2
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-L46 -- 2008 JT35
703Catalina Sky Survey (CSS) in Arizona, 2 in MPEC 2008-L46 -- 2002 JC, 5332
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-L46 -- 2008 LW8, 2008 KW2, 2008 KQ, 2008 JF, 2007 MC4, 2004 CR2
J95Great Shefford Obs. in England, 5 in MPEC 2008-L46 -- 2008 LH2, 2008 LG2, 2008 LA, 2008 KN11, 2008 KD6
682Kanab Obs. in Utah, 1 in MPEC 2008-L46 -- 2008 JO24
H01Magdalena Ridge Obs. (MRO) in New Mexico, 7 in MPEC 2008-L46 -- 2008 LD, 2008 LA, 2008 HU4, 2008 HH, 2007 VT6, 2006 QY110, 2003 AY2
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-L46 -- 2001 FC58
B67Mirasteilas Obs. in Switzerland, 2 in MPEC 2008-L46 -- 2008 LC, 2000 AD205
118Modra Obs. in Slovakia, 3 in MPEC 2008-L46 -- 2008 JT35, 2008 JR26, 2008 JP14
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2008-L46 -- 2008 GF133, 2008 GF133
J93Mt. Tuffley Obs. in England, 5 in MPEC 2008-L46 -- 35107, 137170, 11398, 3288, 1980
J69North Obs. in England, 1 in MPEC 2008-L46 -- 2008 JT35
649Powell Obs. in Kansas, 3 in MPEC 2008-L46 -- 2008 LG2, 2008 LC, 2008 LA
E12Siding Spring Survey in New South Wales, 1 in MPEC 2008-L46 -- 85839
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2008-L47 & 2008-L48 -- C/2008 J9, C/2008 J8, C/2008 J7, C/2008 H8, C/2008 H7, C/2008 H6, C/2008 H5, C/2008 H4
2493LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2008-L47 -- C/2008 H5
691Spacewatch 0.9m telescope in Arizona, 8 in MPEC 2008-L46 -- 2008 LC, 2008 KQ, 2008 KN11, 2008 GA110, 2004 TB18, 89958, 86878, 85628
291Spacewatch 1.8m telescope in Arizona, 1 in MPEC 2008-L46 -- 2008 KZ5
F85Tiki Obs. in Tahiti, 3 in MPEC 2008-L46 -- 2008 LG2, 2008 JT35, 2008 JA8
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 11 June '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1045 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 LW8JPL Sentry10462011-207745.5e-10-4.75-4.840JPL: "Analysis based on 25 observations spanning 1.0455 days (2008-Jun-09.41357 to 2008-Jun-10.45902)." Diameter approximately 1.100 km. from mean, weighted H=17.4.
NEODyS1045R E M O V E D-
2008 LG2JPL Sentry10462038-2105199.7e-06-5.50-5.920JPL: "Analysis based on 77 observations spanning 7.6824 days (2008-Jun-03.31737 to 2008-Jun-10.99976)." Diameter approximately 0.029 km. from mean, weighted H=25.4.
2008 LDJPL Sentry10462049-2108454.2e-05-6.62-7.430JPL: "Analysis based on 26 observations spanning 8.0323 days (2008-Jun-02.29145 to 2008-Jun-10.32379)." Diameter approximately 0.006 km. from mean, weighted H=28.9.
2008 LANEODyS10492027-2088266.03e-05-3.48-3.860NEODyS: "Based on 51 optical observations (of which 0 are rejected as outliers) from 2008/06/01.170 to 2008/06/10.936."
JPL Sentry10462027-2103256.0e-05-3.48-3.850JPL: "Analysis based on 51 observations spanning 9.7663 days (2008-Jun-01.16922 to 2008-Jun-10.93552)." Diameter approximately 0.076 km. from mean, weighted H=23.2.
2008 KN11NEODyS10472037-205156.33e-07-5.12-5.390NEODyS: "Based on 83 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/11.014."
JPL Sentry10462037-204646.4e-07-5.12-5.420JPL: "Analysis based on 83 observations spanning 11.679 days (2008-May-30.33435 to 2008-Jun-11.0135)." Diameter approximately 0.077 km. from mean, weighted H=23.2.
2008 HU4NEODyS10482071-209064.01e-06-7.34-7.730NEODyS: "Based on 72 optical observations (of which 0 are rejected as outliers) from 2008/04/30.325 to 2008/06/10.262."
JPL Sentry10462075-207928.4e-07-8.01-8.140JPL: "Analysis based on 72 observations spanning 40.937 days (2008-Apr-30.32444 to 2008-Jun-10.26128)." Diameter approximately 0.008 km. from mean, weighted H=28.2.

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 11 June '08

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

0129 6/12Grabbed MPEC 2008-L47 - Comets C/2008 H4, 2008 H5, 2008 H6, 2008 H7, 2008 H8 (SOHO) - see above
Grabbed MPEC 2008-L48 - Comets C/2008 J7, 2008 J8, 2008 J9 (SOHO) - see above
1049Noted that NEODyS has updated its 2008 LA risk assessment - see above
1048Noted that NEODyS has updated its 2008 HU4 risk assessment - see above
1047Noted that NEODyS has updated its 2008 KN11 risk assessment - see above
1045Noted that JPL Sentry has reposted 2008 HU4 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 LD 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 LW8 risk assessment - see above
Noted that NEODyS has removed 2008 LW8 as an impact risk - see above
Grabbed MPEC 2008-L46 - Daily Orbit Update - see above