Hi Folks Someone asked this on the ASTRO mailing list. Any takers? Willie ---------- Forwarded message ---------- Date: Mon, 09 Dec 1996 13:02:17 -0400 From: Andres Valencia <avalencia@true.net> To: astro@store-forward.mindspring.com Subject: Re: Server mail loss.. Hello Friends, According to Eric J. Chaisson in "The Hubble Wars"; HST was down to a 356 miles orbit when serviced by Space Shuttle Endeavor, STS-61, on Decembe= r 4, 1994 ("it had fallen some 25 miles in 43 months [since it was originally deployed at 380 miles on April 24, 1990 by the Space Shuttle Discovery, STS-31]"). I'm writing (for ARVAL's WWW site): "HST's initial orbit at 380 miles, is low enough to be somewhat affected by atmospheric drag, lowering it around half a mile per month, depending on Solar activity (which affects ou= r atmosphere's extension) and the space craft's in-orbit attitude. After some 6 years or so, the HST will lower to 325 miles and will have to be re-deployed in a higher orbit." Anybody knows when this re-deployment is planned to occur, and to what heig= ht? Wasn't it low enough to require this in 1996? Was it done in 1994? Saludos, (and Thanks) Andr=E9s