1
If the coordinates are precessed to epoch B1875.0, the constellation boundaries lie neatly along the equatorial coordinate grid, allowing simpler tests against boundary segments.
Roman 1987 describes a basic algorithm and provides implementations in C and F77.
Glaschke 2010 makes a binary partition of the sky for fast lookup and provides an implementation in ...
1
I realized it's the problem of checking whether a point is inside a polygon or not.
I'm now checking the code at http://csharphelper.com/blog/2014/07/determine-whether-a-point-is-inside-a-polygon-in-c/#:~:text=For%20example%2C%20if%20the%20point,zero%2C%20the%20point%20is%20outside.
Only top voted, non community-wiki answers of a minimum length are eligible
Related Tags
constellations × 72star × 17
amateur-observing × 6
night-sky × 4
the-sun × 3
coordinate × 3
history × 3
positional-astronomy × 3
star-gazing × 3
galaxy × 2
exoplanet × 2
distances × 2
photography × 2
milky-way × 2
mars × 2
data-analysis × 2
time × 2
terminology × 2
identify-this-object × 2
ecliptic × 2
sky-survey × 2
pole × 2
zodiac × 2
orion × 2
observational-astronomy × 1