The Danjon astrolabe typically achieved a timing precision of around 25millisec or so. Manually timing transits with a stopwatch will be better than a second but somewhat worse than the Danjon astrolabe.
Bruce > On 28/12/2021 22:42 David Taylor via time-nuts <time-nuts@lists.febo.com> > wrote: > > > On 27/12/2021 20:18, Brent wrote: > > My understanding (and I could be wrong) is that one could derive 'stellar' > > time from a start sight/fix on polaris or another well tracked celestial > > object. I was once told that early editions of Bowditch provided the > > process (for the moon I was told) although one of the relatively old > > edition's that I have doesn't provide it. > > My previous answer mentioned precision, of course, not accuracy. And the > error > I mentioned was not the error in GPS which places the zero degree meridian > some > 102m east of Greenwich! > > David > -- > SatSignal Software - Quality software for you > Web: https://www.satsignal.eu > Email: david-tay...@blueyonder.co.uk > Twitter: @gm8arv > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an > email to time-nuts-le...@lists.febo.com > To unsubscribe, go to and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.
