There is more than one SL-16 though! The tumbler is the one launched in July 1999 carrying an Okean-O "oceanographic" satellite launched by a Zenit-2 booster Other SL-16's have also been launched(zenit's) but are not known tumblers. pj -----Original Message----- From: SDU2828@aol.com <SDU2828@aol.com> To: SeeSat-L@blackadder.lmsal.com <SeeSat-L@blackadder.lmsal.com> Date: Tuesday, August 17, 1999 2:59 PM Subject: SL-16 rockets >I saw my 1st SL-16 rocket last night. I can't believe I never spotted one >before. They certainly stand out with all of that flashing going on. My >question is: Are these things really rockets? I'd be interested in reading >about them. Also why are they tumbling? I know all of you bright people out >there have these answers and probably >much more. Thanks! > >Sherry Underhill >Newark,Illinois >