Is there a coordinate system that may be used with ArcGIS to do a sky survey.
Looking for a projection that is spehrical with longitude expressed as Right Asention in Hours, Minutes, Seconds. I might be trying to do this in the wrong progam and might have to look elsewhere. Every projection I have looked at with Arc doesn't seem to support such functionality or at least allow the coordinates to display as R.A and Dec. as typically used in astronomy will be using the 2000 epoch as datum, if that is how you would define it in this context.
Thanks.