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Re: EQ2HOR discrepancy -- longitude interpretation? [message #70313]

Mon, 29 March 2010 10:31

wlandsman
Messages: 743
Registered: June 2000

Senior Member

On Mar 29, 12:03 pm, Josh Von Korff <vonko...@gmail.com> wrote:

> However, when I change the longitude from -66.75 to +66.75, EQ2HOR
> agrees with http://home.att.net/~srschmitt/script_celestial2horizon.html
> for all inputs I have tried, as long as the former uses +66.75 and the
> latter uses -66.75.

I suspect you have an obsolete version of ct2lst.pro, which converts
local to sidereal time. This is called by eq2hor.pro but had an
opposite sign convention a few years back. Try getting the current
version at http://idlastro.gsfc.nasa.gov/ftp/pro/astro/ct2lst.pro

--Wayne

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Re: EQ2HOR discrepancy -- longitude interpretation?

By: wlandsman on Mon, 29 March 2010 10:31

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