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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Lunars -Venus!
From: Jim Thompson
Date: 2004 Apr 24, 07:25 -0300
From: Jim Thompson
Date: 2004 Apr 24, 07:25 -0300
-----Original Message-----
From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of Frank Reed
Sent: Friday, April 23, 2004 11:05 PM
To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
Subject: Re: Lunars -Venus!
From: Navigation Mailing List [mailto:NAVIGATION-L@LISTSERV.WEBKAHUNA.COM]On Behalf Of Frank Reed
Sent: Friday, April 23, 2004 11:05 PM
To: NAVIGATION-L@LISTSERV.WEBKAHUNA.COM
Subject: Re: Lunars -Venus!
I
did work your lunar just now (using my calculator at www.clockwk.com/cell/lunars.html
, which is based structurally on Arthur Pearson's spreadsheet, and using almanac
data from Omar Reis's online almanac) and the result indicates that your
observation was short by about 3 minutes of arc. Did you use a shade to make
Venus less dazzling? That 3 minute error corresponds to about 1.5 degrees error
in longitude which puts you at sea off Inverness, Nova Scotia. Of course my
clearing procedure may be in error. I just worked it up quick.
Thanks Frank. I just shot it in a hurry for fun, but I am surprised that it seems to be 3' out. I did not use a shade, and I did not use my distance glasses either. I'll have to experiment with both. The ground seemed rather solid, so I'm fairly certain that I wasn't floating around off Nova Scotia,. which implies that I'll have to work harder on my lunar accuracy :)
Thanks Frank. I just shot it in a hurry for fun, but I am surprised that it seems to be 3' out. I did not use a shade, and I did not use my distance glasses either. I'll have to experiment with both. The ground seemed rather solid, so I'm fairly certain that I wasn't floating around off Nova Scotia,. which implies that I'll have to work harder on my lunar accuracy :)
Jim
