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
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