NavList:
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: Nicol�s de Hilster
Date: 2006 Nov 30, 18:30 +0100
From: Nicol�s de Hilster
Date: 2006 Nov 30, 18:30 +0100
On my question regarding experience with Stellarium [NavList 1793] Robert wrote: >Stellarium is an interesting program - I like the option for displaying >non-Western constellations - and I will certainly explore its other options. > >For free astronomical software I usually recommend Sky View Caf� at > > http://www.skyviewcafe.com/ > >which has an amazing range of options and and features which are based on >the algorithms in Jean Meeus, _Astronomical Algorithms_, 2nd ed. >(Willmann-Bell, 1998). > > So I downloaded the program and installed it. About Polaris I asked: >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? > and now I found as an answer a small difference in Polaris between the two programs of 23 arc-seconds in declination (87�16'18" vs 87�16'41") and 2 seconds in right ascension (00:26:32 vs 00:26:34), which is not too bad given the accuracy of period instruments, which was the reason why I wanted to know Polaris' position. I guess I can rely on the average figures. Nicol�s --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to NavList@fer3.com To , send email to NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---
