Lunastro

Lunastro is a python library for calculating astronomical data, such as, but not limited to:

• RA of the sun
• Hour angle of the sun
• Declination of the sun
• Longitude of the Sun's Ascending Node (Omega)
• Solar Geometric mean Anomaly
• Solar Geometric mean Longitude
• True Solar Longitude
• Distance to the sun
• Local sidereal time (accurate to the second)
• Sun altitude
• Sun azimuth
• Moon Position

Usage

Lunastro's functions return objects of information. Here is a list of each function and what it returns:

Solar Data

latitude = 47.6101 # Bellevue WA latitude
solar_data = getSunData(latitude) # get the solar data

This returns:

Altitude of the Sun

# lat and long are of Bellevue WA
latitude = 47.6101
longitude = -122
alt = altitude(latitude, longitude)

This returns the altitude of the sun in radians

Azimuth of the Sun

# lat and long are of Bellevue WA
latitude = 47.6101
longitude = -122
azi = azimuth(latitude, longitude)

This returns the azimuth of the sun in radians

Local Sidereal Time

# longitude 
long = -122
time = localSiderealTime(long)

This returns the local sidereal time as an object:

Moon Positioning

# lat and long are of Bellevue WA
lat = 47.6101
long = -122
moon_pos = getMoonPosition(lat, long)

This returns the positioning of the moon as an object:

Changelog

Version 0.0.21 (March 18th 2023)

• Edited most of the files by making the functions more accurate. Changed the functions to output objects.