Angular Distance
The angular distance between two points on the celestial sphere from their coordinates.
What to find:
Enter coordinates as decimals. The example is Vega and Altair.
This calculator finds the angular distance between two points on the celestial sphere from their coordinates.
sin²(θ/2) = sin²((δ₂ − δ₁)/2) + cos δ₁ · cos δ₂ · sin²((α₂ − α₁)/2)
Example. Vega and Altair are about 34° apart.
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