NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2013 Sep 17, 17:00 -0700
Robin,
As you say
"In the photograph I think that there are enough identifiable stars over a wide enough field to attempt a reasonable non-linear calibration"
This would be an interesting exercise. If your camera is 10MP or more with a 50mm lens then LOP results could be within 3 nautical miles using the estimated height of eye and distance to the horizon that you have provided. A center field star to star distance that is close to the Fomalhaut altitude above the short horizon might be good enough.
Greg Rudzinski
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