Contents  on 6 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.

Radar Astrometry  on 6 June '08

Radar observation of one object

The JPL Solar System Dynamics Group Radar Astrometry database has added the following small-body radar observing work:


Data addition noted at 2358 UTC when the database was dated 6 June

NEOCP Activity  on 6 June '08

The MPC's NEO Confirmation Page has 4 listings: 2 new, 2 updated

When last checked at 2358 UTC today, the Minor Planet Center's NEO discovery Confirmation Page (NEOCP) had two new and two updated listings. Of these, three were "one nighters." So far The Tracking News has counted a total of five objects listed on the NEOCP at some point today.

New MPECs  on 6 June '08

Minor Planet Electronic Circulars

As of last check at 2358 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-L29 - "19:33 UT" - Comets C/2008 G5, 2008 G6, 2008 H2, 2008 H3 (SOHO)


<< DOU on 6 June '08 >>  MPEC 2008-L28 - "06:08 UT" - Daily Orbit Update

Observers  on 6 June '08

Fifteen observing facilities appear in today's MPECs.

CodeObserver / observatory
251Arecibo in Puerto Rico, 1 in radar -- 2003 QB30
H55Astronomical Research Obs. (ARO) in Illinois, 3 in MPEC 2008-L28 -- 2008 LA, 2008 KV28, 2008 KN11
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-L28 -- 137170
E10Faulkes Telescope South in New South Wales, 1 in MPEC 2008-L28 -- 2008 KX2
J95Great Shefford Obs. in England, 2 in MPEC 2008-L28 -- 2008 LH2, 2008 LG2
704LINEAR in New Mexico, 1 in MPEC 2008-L28 -- 8567
304Las Campanas Obs. in Chile, 1 in MPEC 2008-L28 -- 2008 KB12
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-L28 -- 2008 AF32
G96Mt. Lemmon Survey in Arizona, 1 in MPEC 2008-L28 -- 2008 LA
J93Mt. Tuffley Obs. in England, 1 in MPEC 2008-L28 -- 3288
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 4 in MPEC 2008-L28 -- 2008 JP14, 2008 HS3, 2007 VQ4, 137170
2492LASCO Coronagraph 2 (SOHO C2) aboard the Solar & Heliospheric Obs. (SOHO) in Earth-Sun L1 HALO orbit, 4 in MPEC 2008-L29 -- C/2008 H3, C/2008 H2, C/2008 G6, C/2008 G5
2493LASCO Coronagraph 3 aboard the Solar & Heliospheric Obs. in Earth-Sun L1 HALO orbit, 1 in MPEC 2008-L29 -- C/2008 H3
691Spacewatch 0.9m telescope in Arizona, 1 in MPEC 2008-L28 -- 163335
291Spacewatch 1.8m telescope in Arizona, 3 in MPEC 2008-L28 -- 2008 LB, 2008 JM20, 2008 EV5
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-L28 -- 2008 KW2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 6 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 LG2NEODyS12372027-2088111.49e-05-5.03-5.300NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/06/03.318 to 2008/06/06.006."
JPL Sentry12362027-2095141.5e-05-5.03-5.370JPL: "Analysis based on 11 observations spanning 2.6880 days (2008-Jun-03.31737 to 2008-Jun-06.00539)." Diameter approximately 0.032 km. from mean, weighted H=25.1.
2008 LBNEODyS1237206423.74e-09-8.88-8.940NEODyS: "Based on 19 optical observations (of which 0 are rejected as outliers) from 2008/06/01.274 to 2008/06/05.309."
2008 LANEODyS12372015-20881013.39e-05-3.66-4.400NEODyS: "Based on 29 optical observations (of which 0 are rejected as outliers) from 2008/06/01.170 to 2008/06/05.199."
JPL Sentry12362015-21071103.5e-05-3.64-4.360JPL: "Analysis based on 29 observations spanning 4.0291 days (2008-Jun-01.16922 to 2008-Jun-05.19837)." Diameter approximately 0.075 km. from mean, weighted H=23.3.
2008 KN11NEODyS12372035-204656.64e-07-5.07-5.320NEODyS: "Based on 56 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/04.214."
JPL Sentry12362037-204656.8e-07-5.07-5.330JPL: "Analysis based on 56 observations spanning 4.8790 days (2008-May-30.33435 to 2008-Jun-04.21336)." Diameter approximately 0.079 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 6 June '08

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

2358Noted Radar Astrometry database addition - see above
2142Grabbed MPEC 2008-L29 - Comets C/2008 G5, 2008 G6, 2008 H2, 2008 H3 (SOHO) - see above
1237Noted 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
Grabbed MPEC 2008-L28 - Daily Orbit Update - see above
1236Noted 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 NEODyS has reposted 2008 LB as an impact risk - see above
Noted that JPL Sentry has updated its 2008 LG2 risk assessment - see above