Find the LHA of a star if the GHA of the star is 81° 57.3' and the longitude is 174° 32.9' W.
Given:
81° 57.3' - GHA of a star
174° 32.9' W - longitude
What is asked?
Find the LHA of a star
Solution:
1. To get LHA we have to subtract GHA and longitude.
LHA = GHA - longitude
we have to add 360° to the GHA since the longitude is greater.
GHA = 441° 57.3'
longitude = 174° 32.9' W (-)
LHA Star = 267° 24.4' is the answer
By the way, Local Hour Angle is the angular distance measured westerly from the Local Celestial Meridian to the body up to 360°.
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