Re: STS-100 over UK

Date: Thu Apr 19 2001 - 06:03:24 PDT

  • Next message: Cees Bassa: "Re: STS-100 over UK"

    Last night I looked for the ISS on a pass about fifteen minutes later 
    than this will be in local time, and failed to pick it up because the 
    sky was just too bright. 
    The shuttle pass over the UK today is co-incident with sunset. You 
    will need to work out the azimuth and elevation fairly precisely in 
    order to stand a chance of seeing the orbiter and the tank against 
    that sort of background, particularly as it will be coming out of the 
    However, like you I will be trying for it.
    A delay of one hour is out of the question - the shuttle must launch 
    into the orbit plane of the ISS. The launch window for this is 
    generally less than five minutes, representing a maximum dog-leg 
    manoeuvre of plus or minus a half degree in longitude.
    The combined effects of the Earth's motion around the Sun and 
    precession of the ISS orbit about the Earth produce a launch 
    window which gets earlier by approximately 25 minutes per day. 
    Your desired one hour delay for better viewing conditions would 
    have been achieved from a launch on April 17.
    On 19 Apr 2001, at 13:13, 
         UK observers - keep your eyes peeled Westwards around 8pm local time 
         tonight to see the shuttle and discarded external tank (assuming 
         launch is on time).  Worth seeing, I saw them last year just after 
         launch, very nice sighting indeed.  It'll still be quite light at that 
         time so I'm hoping it will be delayed around an hour, then it'll be 
         Matt Fawcett
         53.893N 0.273W
    This email and any files transmitted with it are confidential 
    and intended solely for the use of the individual or entity to 
    whom they are addressed. 
    Please note that The East Riding of Yorkshire Council is able 
    to, and reserves the right to, monitor e-mail communications 
    passing through its network.
    If you have received this email in error please notify our mail 
    manager at
    Whilst every effort has been made to check for viruses in 
    this e-mail and any attachments the Council does not warrant
    that it or they are free of viruses.  If in any doubt then please 
    ask for the hard copy.
    Unsubscribe from SeeSat-L by sending a message with 'unsubscribe'
    in the SUBJECT to
    Unsubscribe from SeeSat-L by sending a message with 'unsubscribe'
    in the SUBJECT to

    This archive was generated by hypermail 2b29 : Thu Apr 19 2001 - 06:05:24 PDT