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[vsnet-chat 3024] Re: [AAVSO-DIS] LD345/Precessing coordinates
- Date: Sun, 4 Jun 2000 08:53:16 -0700 (PDT)
- To: Mike Simonsen <mikesimonsen@mindspring.com>, vsnet-chat@kusastro.kyoto-u.ac.jp
- From: Lew Cook <lcoo@yahoo.com>
- Subject: [vsnet-chat 3024] Re: [AAVSO-DIS] LD345/Precessing coordinates
- Cc: aavso-discussion@informer2.cis.McMaster.CA, pluto@projectpluto.com
- Reply-To: Lew@lewcook.com
- Sender: owner-vsnet-chat@kusastro.kyoto-u.ac.jp
One of the little features in my Heliocentric time correction Excel
spreadsheet program is a precession of the star's coordinates from
J2000 to the date of observation. Put in 19000101 for the date of
observation and the 2000 coordinates and they will be calculated for
the date of observation. Naturally you should disregard the
Heliocentric correction. The spreadsheet is downloadable thru
http://vsnet.geocities.com/lcoo/SUNTime.htm
Proper motions are not included in the calculation, only precession.
=====
Regards, Lew
=== NEW! HOT Star! Shines in X-Rays!===
Check out Lew's work on
"The noisiest star in the Universe"
http://vsnet.lewcook.com/xte1118.htm
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