Re: STS-90: Reentry Question

Dale Ireland (
Sat, 18 Apr 1998 12:39:23 -0700

the brightest I have seen the reentering shuttle is about -5 to -6 mag so
it will be pretty hard to spot in daylight. The plasma trail is invisible
in daylight. It is self-luminous and not reflective and is hard to spot
even in strong twilight. I usually post reentry groundtrack maps on my web
page but there are so many "ifs" about this landing that I haven't done one
this time.


At 09:09 AM 4/18/98 -0700, you wrote:
>Now that STS-90 is up, I'm thinking ahead about its reentry.  This is a
>39-degree inclination mission, which in the past has put the entry path over
>Northern California.
>The nominal landing time is May 3 12:09 PM EDT.  Based on earlier missions,
>an entry pass for Northern California will be approximately 8:45 AM PDT.
>Has anyone seen, or have any thoughts about, visibility of shuttle reentry
>during daytime?
> -- Jim
>Jim Varney   121.398W  38.458N 8m   Sacramento, CA
>Get your free address at

Dale Ireland  47.7N 122.7W
Astronomy Page
Comets, Eclipses, Photography, Fabrications