Shuttle/Mir rendezvous

Nick Quinn (
Sat, 11 Feb 95 17:18:33 GMT

Hi all

Sadly the weather defeated us here in Southern England, in our attempts to view 
Mir and STS-63 together. However, whilst preparing the predictions I noticed 
the following that perhaps someone can explain for me:

Had STS-63 launched on the original day, Mir would have been over the North 
Atlantic at lift-off time and the Shuttle would have been perhaps quarter of an 
orbit or so behind. But, the next day, at the actual launch time, when I 
presume the plane of Mir's orbit was exactly over the Cape, Mir itself was over 
the Indian Ocean some half an orbit ahead of the Shuttle. Does this mean that 
the early orbits had a different perigee/apogee height to what would have been 
used the day before as the 'catch-up' distance was so much greater, but the 
time to do it in the same?

Hope this make sense! Thanks for any answers.

        Nick Quinn                 Internet:
                                   Packet:    G0BAF@GB7VRB.#38.UK.EU