Contents  on 31 May '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 31 May '08

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

When last checked at 1628 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 four 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 31 May '08

Minor Planet Electronic Circulars

As of last check at 1628 UTC, there have been two MPECs issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


MPEC 2008-K66 - "12:23 UT" - 2008 KN11


<< DOU on 31 May '08 >>  MPEC 2008-K65 - "06:07 UT" - Daily Orbit Update

Observers  on 31 May '08

Nineteen observing facilities appear in today's MPECs.

CodeObserver / observatory
B03Alter Satzberg Obs. in Austria, 2 in MPEC 2008-K65 -- 2008 KO, 2007 LL
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-K65 -- 35107
H55Astronomical Research Obs. (ARO) in Illinois, 11 in MPEC 2008-K65 -- 2008 KZ5, 2008 KX2, 2008 KQ, 2008 KO, 2008 JV19, 2008 GV20, 2008 GG2, 2008 GC110, 2008 FW5, 2008 CP23, 2004 XO14
807,Ovidiu Vaduvescu via Cerro Tololo Inter-American Obs. (CTIO) in Chile, 14 in MPECs 2008-K65 & 2008-K66 -- 2008 KN11, 2008 JY30, 2008 JW2, 2008 JU2, 2008 JS26, 2008 JA8, 2008 FN6, 2008 EZ97, 2008 DY, 2008 DE, 2008 CP23, 2007 YB2, 2007 XH16, 2007 WV4
448Desert Moon Obs. in New Mexico, 6 in MPEC 2008-K65 -- 2008 JS26, 2008 JR26, 2008 JQ14, 2008 JO20, 2008 JO, 2007 WV4
F654Jim Bedient in Hawaii via Faulkes Telescope North in Hawaii, 4 in MPECs 2008-K65 & 2008-K66 -- 2008 KY5, 2008 KN11, 1997 NJ6, 153953
651Grasslands Obs. in Arizona, 1 in MPEC 2008-K66 -- 2008 KN11
J95Great Shefford Obs. in England, 3 in MPEC 2008-K65 -- 2008 KZ5, 2008 KT, 2008 KO
442Gualba Obs. in Spain, 1 in MPEC 2008-K65 -- 2008 HS3
B19Iluro Obs. in Spain, 3 in MPEC 2008-K65 -- 2008 JJ, 2005 NB7, 137170
701Junk Bond Obs. in Arizona, 1 in MPEC 2008-K65 -- 2008 KZ5
5682David Tholen's team on Mauna Kea in Hawaii, 1 in MPEC 2008-K65 -- 2008 AF4
474Mt. John Obs. in New Zealand, 8 in MPECs 2008-K65 & 2008-K66 -- 2008 KZ5, 2008 KQ, 2008 KP, 2008 KN11, 2008 HE2, 2008 GX21, 2007 WE55, 2006 KA
G96Mt. Lemmon Survey (MLS) in Arizona, 5 in MPECs 2008-K65 & 2008-K66 -- 2008 KY5, 2008 KN11, 163335, 152679, 143637
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-K65 -- 2008 JP14, 2008 HS3, 2007 VQ4
E12Siding Spring Survey (SSS) in New South Wales, 2 in MPEC 2008-K65 -- 39572, 153591
691Spacewatch 0.9m telescope in Arizona, 4 in MPEC 2008-K65 -- 2008 HV4, 2008 GA110, 85628, 184266
291Spacewatch 1.8m telescope in Arizona, 6 in MPECs 2008-K65 & 2008-K66 -- 2008 KY5, 2008 KN11, 2008 HU4, 2008 DG5, 2004 TB18, 2004 NL8
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-K65 -- 2008 KW2
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 31 May '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 1628 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 KN11JPL Sentry16282031-2073331.2e-05-3.81-4.570JPL: "Analysis based on 33 observations spanning 1.0546 days (2008-May-30.33435 to 2008-May-31.38895)." Diameter approximately 0.084 km. from mean, weighted H=23.0.
2008 KF6NEODyS11422035-208181.32e-08-7.12-7.260NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/05/30.620 to 2008/05/30.711."
2008 KD6NEODyS11422010-2082531.69e-09-5.12-5.690NEODyS: "Based on 11 optical observations (of which 0 are rejected as outliers) from 2008/05/29.430 to 2008/05/30.421."
2008 KZ5NEODyS11422013-2089352.62e-06-2.93-3.480NEODyS: "Based on 40 optical observations (of which 1 are rejected as outliers) from 2008/05/29.229 to 2008/05/31.016."
JPL Sentry11402013-21072907.4e-06-2.40-2.770JPL: "Analysis based on 39 observations spanning 1.7873 days (2008-May-29.22802 to 2008-May-31.01534)." Diameter approximately 0.350 km. from mean, weighted H=19.9.
2008 KX2NEODyS1141R E M O V E D-
JPL Sentry1140R E M O V E DJPL: Risk listing removed at 0850 UTC.
2008 KTJPL Sentry11402100-210534.6e-07-8.40-8.590JPL: "Analysis based on 23 observations spanning 2.6661 days (2008-May-28.25417 to 2008-May-30.92022)." Diameter approximately 0.008 km. from mean, weighted H=28.2.
NEODyS1141R E M O V E D-
2008 KONEODyS11422049-206131.06e-06-5.31-5.640NEODyS: "Based on 38 optical observations (of which 0 are rejected as outliers) from 2008/05/27.377 to 2008/05/30.986."
JPL Sentry11402049-205229.4e-07-5.35-5.630JPL: "Analysis based on 38 observations spanning 3.6090 days (2008-May-27.3758 to 2008-May-30.984819)." Diameter approximately 0.044 km. from mean, weighted H=24.4.
2008 HU4NEODyS13022076-208874.47e-06-7.37-7.590NEODyS: "Based on 58 optical observations (of which 0 are rejected as outliers) from 2008/04/30.325 to 2008/05/30.342."
JPL Sentry11402059-207844.4e-06-7.36-7.560JPL: "Analysis based on 58 observations spanning 30.016 days (2008-Apr-30.32444 to 2008-May-30.34085)." Diameter approximately 0.007 km. from mean, weighted H=28.4.
2008 AF4JPL Sentry11402089-210041.6e-06-3.49-3.760JPL: "Analysis based on 602 observations spanning 130.92 days (2008-Jan-10.39652 to 2008-May-20.315005)." Diameter approximately 0.390 km. from mean, weighted H=19.7.
NEODyS1141R E M O V E D-

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 31 May '08

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

1628Noted that JPL Sentry has posted 2008 KN11 as an impact risk - see above
1302Noted that NEODyS has updated its 2008 HU4 risk assessment - see above
1300Grabbed MPEC 2008-K66 - 2008 KN11 - see above
1142Noted that NEODyS has updated its 2008 KO risk assessment - see above
1141Noted that NEODyS has removed 2008 AF4 as an impact risk - see above
Noted that NEODyS has posted 2008 KD6 as an impact risk - see above
Noted that NEODyS has posted 2008 KF6 as an impact risk - see above
Noted that NEODyS has removed 2008 KT as an impact risk - see above
Noted that NEODyS has removed 2008 KX2 as an impact risk - see above
Noted that NEODyS has posted 2008 KZ5 as an impact risk - see above
Grabbed MPEC 2008-K65 - Daily Orbit Update - see above
1140Noted that JPL Sentry has updated its 2008 AF4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 HU4 risk assessment - see above
Noted that JPL Sentry has updated its 2008 KO risk assessment - see above
Noted that JPL Sentry has updated its 2008 KT risk assessment - see above
Noted that JPL Sentry has removed 2008 KX2 as an impact risk - see above
Noted that JPL Sentry has updated its 2008 KZ5 risk assessment - see above