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- Newsgroups: sci.astro
- From: chris@chrism.demon.co.uk (Chris Marriott)
- Path: sparky!uunet!europa.asd.contel.com!howland.reston.ans.net!spool.mu.edu!agate!doc.ic.ac.uk!pipex!demon!chrism.demon.co.uk!chris
- Subject: Long-term precession
- Distribution: world
- Organization: None
- Reply-To: chris@chrism.demon.co.uk
- X-Mailer: Simple NEWS 1.90 (ka9q DIS 1.19)
- Lines: 22
- Date: Sun, 24 Jan 1993 21:02:54 +0000
- Message-ID: <727909374snz@chrism.demon.co.uk>
- Sender: usenet@demon.co.uk
-
- I know how to compute the effects of precession over a few centuries -
- the standard equations are in all the books.
-
- Could anyone give me any advice, though, on how to correct a star's position
- for precession over a longer period a time - a significant fraction of the
- 26,000 year cycle? I assume it's just a simple rotation in ecliptic
- longitude - is this correct? I'm afraid my spherical trig is not too
- brilliant!
-
- All advice would be appreciated!
-
- Best wishes,
-
- Chris
- --
- --------------------------------------------------------------------------
- | Chris Marriott | chris@chrism.demon.co.uk |
- | Warrington, UK | BIX: cmarriott |
- | | CIX: cmarriott |
- | Save the whales. Collect the whole set. | CompuServe: 100113,1140 |
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