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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Stellarium and the heavens in the 17th century
From: Paul Hirose
Date: 2006 Nov 30, 22:31 -0800
From: Paul Hirose
Date: 2006 Nov 30, 22:31 -0800
Nicolàs de Hilster wrote: > > According to Stellarium on September 23rd, 1623 (Gregorian calendar), > Polaris had a right ascension of 00:26:32 and a declination of > +87°16'41". Is this correct? With my Sofajpl DLL, which uses the star positions and proper motions from the Hipparcos catalog, I get apparent geocentric coordinates 0h 26m 42.6s, +87° 16′ 15″, with respect to the true equator and equinox at 0h on that date. Compared to the Stellarium and Sky View values, the differences are 27 and 7 arc seconds, respectively. Who's right? I don't know. -- I block messages that contain attachments or HTML. --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
