All these times are correct as to the web site I got the info from.
apart from the launch time being 12:00 if no exact time was given.
UPDATE: These time frames only work with Celestia 1.2.5-Pre7
Apollo 10
Beginning "1969 5 18 12:49" # Launch
Ending "1969 5 26 12:55" # Return
Apollo 11
Beginning "1969 7 16 09:32" # Launch
Ending "1969 7 24 12:55" # Return
International Space Station
Beginning "1998 11 20 12:00" # Zarya module launched
# Ending ??? Still in Orbit
Hubble Space Telescope
Beginning "1990 4 25 12:00" # Launched
# Ending 2010 ? Still in Orbit
SkyLab
Beginning "1973 5 14 12:00" # Launch
Ending "1979 6 11 12:00" # Reentered Atmosphere
Space Station Mir
Beginning "1986 2 20 12:00" # Launched
Ending "2001 3 21 12:00" # Re-entered Atmosphere
Sputnik 1
Beginning "1957 10 4 12:00" # Launch
Ending "1958 1 4 12:00" # Re-entered Atmosphere
Mars Odyssey
Beginning "2001 10 24 12:00" # Arrive at mars
# Ending ??? Still in Orbit
Mars Global Surveyor
Beginning "1997 9 12 12:00" # Arrived at mars
# Ending ??? Still in Orbit
Galileo
Beginning "1989 10 18 22:23" # Launch
Ending "2003 9 21 10:44" # Crash into Jupiter
Voyager 1
Beginning "1977 9 5 12:56" #Launch
# Ending ??? Still in Orbit
Voyager 2
Beginning "1977 8 20 14:29" #Launch
# Ending ??? Still in Orbit
-** And Goes Earth Weather Satalites **-
Goes-8
Beginning "1994 4 13 12:00" #Launch
# Ending ? Still in Orbit
Goes-9
Beginning "1995 5 23 12:00" #Launch
# Ending ? Still in Orbit
Goes-10
Beginning "1997 4 25 12:00" #Launch
# Ending ? Still in Orbit
And here is an example of where to put these lines
within your .ssc file.
"Apollo11" "Sol/Earth/Moon"
{
Class "spacecraft"
Mesh "apollo11.3ds"
Radius 0.010
Beginning "1969 7 16 09:32" # Launch
Ending "1969 7 24 12:55" # Return
EllipticalOrbit
{
Period 0.5
SemiMajorAxis 2000
Eccentricity 0.01
Inclination 5
}
Albedo 0.10
}