NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: sky display program.
From: Dave Walden
Date: 2006 Dec 13, 08:55 -0800
From: Dave Walden
Date: 2006 Dec 13, 08:55 -0800
Perhaps Xephem will meet your needs. For that job, I need to display a picture of a small part of the visible sky, YES, CAN ZOOM plotted in altitude and azimuth, YES, CAN CHOOSE ALT/AZ, OR RA/DEC expandable up to (say) a couple of degrees across the screen, YES with sky objects reasonably precisely positioned for dates around 1700 AD, with errors no more than 0.1 arc-minutes. PROPER MOTION DATABASES AVAILABLE WILL GIVE HIGH ACCURACY I also need to know the coordinates of selected objects in terms of (geocentric) ecliptic longitude and latitude, THIS ONE ELIMINATES MANY OPTIONS, BUT XEPHEM HAS A TOOL THAT LETS YOU POINT TO ANY OPJECT IN VIEW AND READ OUT RA/DEC@2000, OR CHOSEN EPOCH, ALT/AZ, GALACTIC LAT/LONG, OR ECLIPTIC LAT/LONG to the same sort of precision, TO 10TH OF SECOND ideally with movable grid lines corresponding to those coordinates. SORRY NO ECLIPTIC COORD GRID I need that display to show (from a chosen geographic position) GOCENTRIC OR TOPOCENTRIC a precise view of the Moon, at its correct diameter, and with its shadow-terminator rigorously calculated according to the actual positions of Sun and Moon at that moment. TERMINATOR IS SHOW --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
