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Re: Latitude From Two Star Altitudes Only
From: Andrés Ruiz
Date: 2026 Apr 10, 12:30 +0200
From: Andrés Ruiz
Date: 2026 Apr 10, 12:30 +0200
Circumference of equal altitude.
sin H = sin B sin Dec + cos B cos Dec cos (GHA+L)
The most beautiful equation in the world. Not Euler's identity :)
B: latitude
L: longitude
Dec: declination
GHA: Greenwich Hour Angle
H: Altitude
L: longitude
Dec: declination
GHA: Greenwich Hour Angle
H: Altitude
Only language:
It is not a circle. In marine navigation is altitude not height.
In Spanish and in other Latin languages: altura, recta de altura (LoP), circunferencia de altura, Circunferencia de alturas iguales, ...
An example with my free App: AstroNavigation for Windows.
Fair winds
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