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Re: circles on the sky [message #65942 is a reply to message #65879]

Tue, 31 March 2009 12:34

Kenneth P. Bowman
Messages: 585
Registered: May 2000

Senior Member

In article <alpine.OSX.1.10.0903311335490.8491@kanangra.uchicago.edu>,
Christopher Thom <cthom@oddjob.uchicago.edu> wrote:

> Given a co-ordinate position (ra/dec or lat/long), a direction (e.g an
> angle east of north, for instance), and a great circle angular distance,
> how do I compute the coordinate of the final position?

LL_ARC_DISTANCE.

What! That wasn't obvious? :-)

(This function should be referenced in the manual page for MAP_2POINTS,
and vice versa.)

Ken Bowman

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[Message index]

		circles on the sky By: Christopher Thom on Fri, 27 March 2009 10:53
		Re: circles on the sky By: pgrigis on Tue, 31 March 2009 15:45
		Re: circles on the sky By: Christopher Thom on Tue, 31 March 2009 15:27
		Re: circles on the sky By: JDS on Tue, 07 April 2009 07:17
		Re: circles on the sky By: pgrigis on Tue, 31 March 2009 14:20
		Re: circles on the sky By: Christopher Thom on Tue, 31 March 2009 14:07
		Re: circles on the sky By: pgrigis on Tue, 31 March 2009 13:00
		Re: circles on the sky By: Kenneth P. Bowman on Tue, 31 March 2009 12:34

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