Contents  on 20 June '08

Resources:

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 20 June '08

The MPC's NEO Confirmation Page is currently empty

The NEOCP is currently empty and hasn't been noted by The Tracking News as being active yet today (last checked at 2357 UTC).

New MPECs  on 20 June '08

Minor Planet Electronic Circulars

As of last check at 2357 UTC, there has been one MPEC issued today from the International Astronomical Union's Minor Planet Center in Cambridge, Massachusetts.


<< DOU on 20 June '08 >>  MPEC 2008-M21 - "06:06 UT" - Daily Orbit Update

Observers  on 20 June '08

Twelve observing facilities appear in today's MPEC.

CodeObserver / observatory
B37Ametlla del Valles Obs. in Spain, 1 in MPEC 2008-M21 -- 1866
H55Astronomical Research Obs. (ARO) in Illinois, 16 in MPEC 2008-M21 -- 2008 LW8, 2008 LW16, 2008 LV16, 2008 LQ16, 2008 LH2, 2008 LA, 2008 KZ5, 2008 KW2, 2008 KN11, 2008 JR26, 2008 JF, 2008 HV4, 2008 HE66, 2007 MC4, 2004 XO14, 4179
J51Atlante Obs. in the Canary Islands, 5 in MPEC 2008-M21 -- 2008 JT35, 2005 TU45, 11398, 8567, 1917
A81Balzaretto Obs. in Italy, 1 in MPEC 2008-M21 -- 2008 KN11
J27El Guijo Obs. in Spain, 2 in MPEC 2008-M21 -- 2005 TU45, 35107
J95Great Shefford Obs. in England, 2 in MPEC 2008-M21 -- 2008 LA, 2008 KN11
H01Magdalena Ridge Obs. in New Mexico, 1 in MPEC 2008-M21 -- 2008 LW16
H45Petit Jean Mtn. South Obs. (PJMSO) in Arkansas, 3 in MPEC 2008-M21 -- 2008 JT35, 2005 TU45, 2000 AD205
691Spacewatch 0.9m telescope in Arizona, 2 in MPEC 2008-M21 -- 2000 QW7, 86878
6735Jim Young via Table Mtn. Obs. in southern California, 1 in MPEC 2008-M21 -- 2008 LQ16
6892program code 2 via U.S. Naval Obs. Flagstaff Station (USNO Flagstaff) in Arizona, 2 in MPEC 2008-M21 -- 1980, 1036
A48Verona Obs. in Italy, 2 in MPEC 2008-M21 -- 2008 JT35, 2000 AD205
For a list of all participating observatories that have Web addresses, see A/CC's Observatory Links page.

Impact Risk Monitoring  on 20 June '08

Summary Risk Table for Risk Assessments Updated Today   (last checks: NEODyS and JPL at 2357 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 LW16JPL Sentry1444207018.7e-10-6.44-6.440JPL: "Analysis based on 34 observations spanning 3.9969 days (2008-Jun-15.38141 to 2008-Jun-19.37831)." Diameter approximately 0.400 km. from mean, weighted H=19.6.
NEODyS1444R E M O V E D-
2008 LV16NEODyS14462015-2089247.62e-07-3.41-4.150NEODyS: "Based on 34 optical observations (of which 0 are rejected as outliers) from 2008/06/15.381 to 2008/06/19.256."
JPL Sentry14442021-2081176.4e-07-3.44-4.040JPL: "Analysis based on 34 observations spanning 3.8757 days (2008-Jun-15.3798 to 2008-Jun-19.255496)." Diameter approximately 0.339 km. from mean, weighted H=20.0.
2008 LANEODyS14462058-207973.61e-05-3.62-3.630NEODyS: "Based on 66 optical observations (of which 0 are rejected as outliers) from 2008/06/01.170 to 2008/06/20.009."
JPL Sentry14442058-210773.7e-05-3.61-3.620JPL: "Analysis based on 66 observations spanning 18.839 days (2008-Jun-01.16922 to 2008-Jun-20.00863)." Diameter approximately 0.078 km. from mean, weighted H=23.2.
2008 KN11NEODyS1446204612.6e-07-5.57-5.570NEODyS: "Based on 129 optical observations (of which 0 are rejected as outliers) from 2008/05/30.335 to 2008/06/19.985."
JPL Sentry1444204613.5e-07-5.44-5.440JPL: "Analysis based on 129 observations spanning 20.650 days (2008-May-30.33435 to 2008-Jun-19.98442)." Diameter approximately 0.075 km. from mean, weighted H=23.3.

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 20 June '08

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

1446Noted 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 LV16 risk assessment - see above
1444Noted 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 LV16 risk assessment - see above
Noted that JPL Sentry has updated its 2008 LW16 risk assessment - see above
Noted that NEODyS has removed 2008 LW16 as an impact risk - see above
Grabbed MPEC 2008-M21 - Daily Orbit Update - see above