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- Path: sparky!uunet!mcsun!Germany.EU.net!unido!news.Hamburg.Germany.EU.net!abbs.hanse.de!ch.steyaert
- From: ch.steyaert@abbs.hanse.de (Chris Steyaert)
- Newsgroups: sci.astro
- Subject: Re: Calculating Planetary Positions
- Message-ID: <865527.11967@ABBS.zer.sub.org>
- Date: 25 Aug 92 18:30:01 GMT
- Reply-To: ch.steyaert@abbs.hanse.de
- Distribution: sci
- Organization: ABBS AstroMail, D-W 2121 Dahlenburg / Germany
- Lines: 32
- X-Version: ZerUU V6.45c
-
- In a message of Aug 20, Travis R. Stone writes:
-
- > Meeus gives you rough formulae only for Pluto, since the
- > wobbly little bastard's orbit is so hard to pin down (i.e.,
- > there has been no good "theory" derived for Pluto's motion
- > yet).
-
- Pluto is now included with higher accuracy in the new book of
- Jean Meeus, Astronomical Algorithms, the follow-up of Astronomical
- Formulae for Calculators (both available from Willmann-Bell).
-
- Chapter 36 gives an "accurate representation of the planet's motion".
- This is not a "theory", as periodic terms have been fitted to
- numerical integrations.
-
- The book gives the heliocentric longitude and latitude with respect
- to J2000.0. In the original article [A&A, Vol. 155, p 323-325,
- (1986)], this was still B1950.0.
-
- --
-
- Chris Steyaert
- Dr. Vandeperrestr. 83
- B 2440 Geel
- Belgium
- tel (32)14582075 fax (32)14221373
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