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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Pub. 249 question
From: Stan K
Date: 2017 Nov 25, 13:34 -0500
From: Stan K
Date: 2017 Nov 25, 13:34 -0500
Dave,
Just came in from my initial attempt at cleaning out my gutters. As I looked at the trees, I wondered why I was even bothering. Not that I am complaining about the mild October and November we are having, but the trees seem really confused. I'd estimate that only half the leaves are off.
Anyway, what generates the red circles in pick7, and what generates the stars themselves? It seems there is a red circle where Rigel should be, but no Rigel. Maybe your next messages will tell me.
Stan
-----Original Message-----
From: Dave Walden <NoReply_Walden@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Sat, Nov 25, 2017 11:00 am
Subject: [NavList] Re: Pub. 249 question
Attached File:
From: Dave Walden <NoReply_Walden@fer3.com>
To: slk1000 <slk1000@aol.com>
Sent: Sat, Nov 25, 2017 11:00 am
Subject: [NavList] Re: Pub. 249 question
For Stan's conditions:
The 1947 preliminary 249 picks 6 not 7. It chose,dubhe,pollux, betegeux, aldebaran, alphertaz, and deneb.
My algorithm pick7 selects 6 of the HO249, but misses one. Looking at a plot of altitudes and azimuths (attached), I can't understand.
249
Dubhe
pollux
BETELGEUSE
RIGEL
Hamal
Alpheratz
deneb
count
in 249, not pick7
x
x
x
RIGEL
x
x
x
In pick7, not HO249
.
.
.
Menkar
.
.
.
Attached File:
