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- Xref: sparky sci.space:16231 sci.astro:12292 alt.sci.planetary:347
- Path: sparky!uunet!world!ksr!clj@ksr.com
- From: clj@ksr.com (Chris Jones)
- Newsgroups: sci.space,sci.astro,alt.sci.planetary
- Subject: Aerobraking [was Re: Magellan Update - 11/20/92]
- Message-ID: <19117@ksr.com>
- Date: 21 Nov 92 17:14:10 EST
- References: <1992Nov20.232659.8134@elroy.jpl.nasa.gov> <1ellrpINNh2a@rave.larc.nasa.gov> <By32px.8Lp@zoo.toronto.edu>
- Sender: news@ksr.com
- Reply-To: clj@ksr.com (Chris Jones)
- Followup-To: sci.space
- Organization: Kendall Square Research Corp
- Lines: 19
- In-reply-to: henry@zoo.toronto.edu (Henry Spencer)
-
- In article <By32px.8Lp@zoo.toronto.edu>, henry@zoo (Henry Spencer) writes:
- >In article <1ellrpINNh2a@rave.larc.nasa.gov> claudio@nmsb.larc.nasa.gov (Claudio Egalon) writes:
- >>BTW, I think Magellan will become the first spacecraft to conduct an
- >>aerobraking maneuver to change its orbit, right???
- >
- >Wrong. Hiten -- the Japanese engineering-test mission that's been batting
- >around the Earth-Moon system for a couple of years -- did a small Earth
- >aerobraking maneuver in spring 1991.
-
- At least two of the Soviet circumlunar Zond flights used an aerobraking
- maneuver to minimize the G forces on reentry. The descent module entered the
- atmosphere at an angle low enough to "skip" off back into space, having shed
- enough velociy so the second reentry would have been more comfortable for the
- human occupant(s) on the presumed followon flight (never flown since Apollo 8
- got there firstest with the mostest). I recall that the Zond flights which
- reentered directly underwent over 15 Gs, while the "skip return" trajectory
- subjected the craft to around 5 Gs.
- --
- Chris Jones clj@ksr.com
-