NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Dave Walden
Date: 2011 Aug 11, 18:12 -0700
Given three lunar distances (only, no altitudes), can one find time and postion?
On 14 July 2011, some time between 0300 and 0400 near 39N, 77W, one observes the
following center to center lunar distances:
Moon - Antares +28° 0' 25.1"
Moon - Altair +37° 4' 31.1"
Moon - Vega +61° 34' 11.5"
Given the ephemeris data:
Moon GHA Dec HP
0300 +58° 54' 42.0" -21° 59' 37.0" +57' 33.7"
0400 +73° 21' 14.7" -21° 54' 47.6" +57' 32.4"
Antares
0300 +89° 6' 10.7" -26° 27' 28.6"
0400 +104° 8' 38.5" -26° 27' 28.6"
Altair
0300 +38° 47' 45.3" +8° 54' 5.5"
0400 +53° 50' 13.1" +8° 54' 5.5"
Vega
0300 +57° 17' 59.2" +38° 47' 49.4"
0400 +72° 20' 27.1" +38° 47' 49.4"
Partial credit, outline a method. Full credit give time and position.
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