Contents  on 5 June '08

Resources:

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 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 5 June '08

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

When last checked at 2046 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new listings. Both of these were "one nighters." The Tracking News counted a total of four objects listed on the NEOCP at some point on this day.

New MPECs  on 5 June '08

Minor Planet Electronic Circulars

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


MPEC 2008-L27 - "22:20 UT" - Comets C/2008 E8, 2008 E9, 2008 G3, 2008 G4 (SOHO)


MPEC 2008-L26 - "21:52 UT" - Comets C/2008 D8, 2008 D9, 2008 E7 (SOHO)


MPEC 2008-L25 - "18:10 UT" - Comet C/2008 J6 (Hill)


MPEC 2008-L24 - "18:07 UT" - Comet C/2008 J5 (Garradd)


MPEC 2008-L23 - "18:03 UT" - Comet P/2008 J3 (McNaught)


MPEC 2008-L22 - "11:45 UT" - 2008 LH2


MPEC 2008-L21 - "11:23 UT" - 2008 JF


<< DOU on 5 June '08 >>  MPEC 2008-L20 - "06:08 UT" - Daily Orbit Update


MPEC 2008-L19 - "03:31 UT" - Comets C/2008 D5, 2008 D6, 2008 D7 (SOHO)


MPEC 2008-L18 - "03:04 UT" - Comets C/2008 C6, 2008 C7, 2008 C8, 2000 C9 (SOHO)

Observers  on 5 June '08

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

CodeObserver / observatory
448Desert Moon Obs. in New Mexico, 3 in MPEC 2008-L20 -- 2008 JO, 2008 JG, 2007 MK13
E85Farm Cove Obs. in New Zealand, 1 in MPEC 2008-L24 -- C/2008 J5
J95Great Shefford Obs. in England, 2 in MPECs 2008-L21 & 2008-L22 -- 2008 LH2, 2008 JF
415Kambah Obs. in the Australian Capital Territory, 2 in MPECs 2008-L23 & 2008-L24 -- C/2008 J5, P/2008 J3
704LINEAR in New Mexico, 4 in MPECs 2008-L20, 2008-L21 & 2008-L22 -- 2008 LH2, 2008 JR26, 2008 JF, 54789
304Las Campanas Obs. in Chile, 1 in MPEC 2008-L20 -- 2005 TJ174
J40Malaga Obs. in Spain, 1 in MPEC 2008-L20 -- 1917
G96Mt. Lemmon Survey (MLS) in Arizona, 2 in MPEC 2008-L20 -- 2000 WM107, 102873
J47Nazaret Obs. in Spain, 1 in MPEC 2008-L25 -- C/2008 J6
423North Ryde Obs. in New South Wales, 2 in MPECs 2008-L23 & 2008-L24 -- C/2008 J5, P/2008 J3
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 2 in MPEC 2008-L20 -- 2007 VR183, 2007 VQ4
H06RAS Obs. Mayhill in New Mexico, 1 in MPEC 2008-L25 -- C/2008 J6
C494HI1-A instrument (4) aboard STEREO-A in heliocentric orbit leading Earth, 7 in MPECs 2008-L18, 2008-L19, 2008-L26 & 2008-L27 -- C/2008 E9, C/2008 E8, C/2008 D9, C/2008 D8, C/2008 D7, C/2008 C7, C/2008 C6
854Sabino Canyon Obs. in Arizona, 2 in MPECs 2008-L21 & 2008-L22 -- 2008 LH2, 2008 JF
056Skalnate Pleso Obs. in Slovakia, 1 in MPEC 2008-L25 -- C/2008 J6
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 8 in MPECs 2008-L18, 2008-L19, 2008-L26 & 2008-L27 -- C/2008 G4, C/2008 G3, C/2008 E9, C/2008 E7, C/2008 D9, C/2008 D6, C/2008 C9, C/2008 C8
2493LASCO Coronagraph 3 (SOHO C3) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 10 in MPECs 2008-L18, 2008-L19, 2008-L26 & 2008-L27 -- C/2008 E9, C/2008 E8, C/2008 E7, C/2008 D9, C/2008 D8, C/2008 D7, C/2008 D5, C/2008 C8, C/2008 C7, C/2008 C6
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-L20 -- 2008 LC, 2008 HV4, 2008 GA110, 154453
291Spacewatch 1.8m telescope in Arizona, 5 in MPEC 2008-L20 -- 2008 LD, 2008 LB, 2008 KN11, 2008 KD6, 2008 EL6
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-L21 -- 2008 JF
367Yatsuka Obs., 1 in MPEC 2008-L25 -- C/2008 J6
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 5 June '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2046 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 LG2NEODyS14342027-2087212.91e-06-5.47-5.710NEODyS: "Based on 8 optical observations (of which 0 are rejected as outliers) from 2008/06/03.318 to 2008/06/04.351."
JPL Sentry03162015-21062181.1e-05-5.10-5.780JPL: "Analysis based on 8 observations spanning 1.0325 days (2008-Jun-03.31737 to 2008-Jun-04.34991)." Diameter approximately 0.033 km. from mean, weighted H=25.1.
2008 LDNEODyS14342049-2090353.15e-05-6.67-6.910NEODyS: "Based on 22 optical observations (of which 1 are rejected as outliers) from 2008/06/02.292 to 2008/06/04.227."
JPL Sentry14332049-2108535.0e-05-6.55-6.990JPL: "Analysis based on 21 observations spanning 1.9348 days (2008-Jun-02.29145 to 2008-Jun-04.22626)." Diameter approximately 0.005 km. from mean, weighted H=29.0.
2008 LBJPL Sentry1433R E M O V E DJPL: Risk listing removed at 0850 UTC.
NEODyS1433R E M O V E D-
2008 KN11NEODyS14342030-204666.68e-07-5.05-5.310NEODyS: "Based on 53 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/04.214."
JPL Sentry14332037-204656.8e-07-5.05-5.320JPL: "Analysis based on 53 observations spanning 4.8790 days (2008-May-30.33435 to 2008-Jun-04.21336)." Diameter approximately 0.080 km. from mean, weighted H=23.2.

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 5 June '08

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

0201 6/6Grabbed MPEC 2008-L26 - Comets C/2008 D8, 2008 D9, 2008 E7 (SOHO) - see above
Grabbed MPEC 2008-L27 - Comets C/2008 E8, 2008 E9, 2008 G3, 2008 G4 (SOHO) - see above
2046Grabbed MPEC 2008-L23 - Comet P/2008 J3 (McNaught) - see above
Grabbed MPEC 2008-L24 - Comet C/2008 J5 (Garradd) - see above
Grabbed MPEC 2008-L25 - Comet C/2008 J6 (Hill) - see above
1434Noted that NEODyS has updated its 2008 KN11 risk assessment - see above
Noted that NEODyS has updated its 2008 LD risk assessment - see above
Grabbed MPEC 2008-L19 - Comets C/2008 D5, 2008 D6, 2008 D7 (SOHO) - see above
Grabbed MPEC 2008-L20 - Daily Orbit Update - see above
Grabbed MPEC 2008-L21 - 2008 JF - see above
Grabbed MPEC 2008-L22 - 2008 LH2 - see above
1433Noted that JPL Sentry has updated its 2008 KN11 risk assessment - see above
Noted that JPL Sentry has removed 2008 LB as an impact risk - see above
Noted that NEODyS has removed 2008 LB as an impact risk - see above
Noted that JPL Sentry has updated its 2008 LD risk assessment - see above
Noted that NEODyS has posted 2008 LG2 as an impact risk - see above
0316Noted that JPL Sentry has posted 2008 LG2 as an impact risk - see above
Grabbed MPEC 2008-L18 - Comets C/2008 C6, 2008 C7, 2008 C8, 2000 C9 (SOHO) - see above