NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Celestial Navigation Data from USNO--alternative
From: Bruce J. Pennino
Date: 2019 Nov 28, 08:55 -0600
Thank you and best regards to all. Happy Thanksgiving to those celebrating, and everyone have a happy day.
To: bpennino.ce@charter.net
Cc:
Sent: Wednesday November 27 2019 1:33:51PM
Subject: [NavList] Re: Celestial Navigation Data from USNO--alternative
From: Bruce J. Pennino
Date: 2019 Nov 28, 08:55 -0600
Hello:
For past several months I have not been following the discussions. But the title " USNO - alternative" caught my eye.
A short while ago I tried to use the USNO web site to do some planet observations. The celestial navigation "data" portion of the site does not seem to exist anymore. I vaguely recollect Frank writing this has something to do with conflicts with commercial interests. I just don't remember.
Maybe this should be a new topic, but what is the latest update on the USNO site? Furthermore,what website can I use to input latitude, longitude, and time to get data for locally visible celestial bodies (altitude & azimuth)?
hankBruce
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From: "Antoine Couëtte"To: bpennino.ce@charter.net
Cc:
Sent: Wednesday November 27 2019 1:33:51PM
Subject: [NavList] Re: Celestial Navigation Data from USNO--alternative
re / Ritchie-nov-2019-g4624
Nice comparison indeed !
Which TT-UT (DeltaT) are each of these authors using ?
For the Moon, it seems worth knowing DeltaT in order to perform fully meaningful comparisons.
Kermit
