nenupy.astro.astro_tools.local_sidereal_time

nenupy.astro.astro_tools.local_sidereal_time(time, observer=<EarthLocation (4323936.68522791, 165534.49991696, 4670345.36540385) m>, fast_compute=True)[source]

Computes the Local Sidereal Time. Viewed from observer, a fixed celestial object seen at one position in the sky will be seen at the same position on another night at the same sidereal time. LST angle indicates the Right Ascension on the sky that is currently crossing the Local Meridian.

Parameters:

time (Time) – UT Time to be converted.
observer (EarthLocation) – Earth location of the observer.
fast_compute (bool) – If set to True, this computes an approximation of the local sidereal time, otherwise sidereal_time() is used.

Returns:

Local Sidereal Time angle

Return type:

Longitude

Example:

from nenupy.astro import local_sidereal_time
from astropy.time import Time

lst = local_sidereal_time(
    time=Time("2022-01-01T12:00:00"),
    fast_compute=True
)