lunastro 0.0.22

python package for lunar and solar information

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:

Attribute	Description
dec	current solar declination
hour_angle	current solar hour angle
ra	current solar right ascension
long_omega	Longitude of the Sun's ascending node
true_solar_anomaly	true solar anomaly
true_solar_longitude	true solar longitude
geo_anomaly	geometric mean anomaly of the sun
geo_long	geometric mean longitude of the sun
dist	distance to the sun in miles

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:

Attribute	Description
raw	raw sidereal time
hour	hours of sidereal time
minute	minutes of sidereal time
second	seconds of sidereal time

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:

Attribute	Description
azimuth	azimuth of the moon
altitude	altitude of the moon
distance	distance to the moon in KM
parallacticAngle	parallactic angle of the moon

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.