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Re: Plumb-line horizon vs. geocentric horizon
From: Frank Reed CT
Date: 2005 Feb 10, 22:19 EST
From: Frank Reed CT
Date: 2005 Feb 10, 22:19 EST
Pierre Brial, you wrote:
"Not yet. My sextant has a mechanical accuracy of 0.2', but despite
the
fact I have adjusted it, repeated tests on star distances show me that
it is difficult to have a practical accuracy of under 0.8'. But may be
this is also because of my lack of experience or inaccuracies in my eye."
fact I have adjusted it, repeated tests on star distances show me that
it is difficult to have a practical accuracy of under 0.8'. But may be
this is also because of my lack of experience or inaccuracies in my eye."
Do you have a good telescope on it? I have found that I can only get down
to 0.2' accuracy with a 7x35 monocular on my sextant.
And:
"Are these notes available somewhere ? Foreign accounts on Reunion
for
18th century are not well known here..."
18th century are not well known here..."
It's in the Boston Public Library in Massachusetts. I have only read
summary accounts, but next time I'm out east, it's on my list of things to read.
I'll let you know if there's more of interest regarding Reunion.
And:
"err.. things have not changed ..."
I laughed aloud when I read that. Thanks for the update!
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
