qastutil 0.32

Some quick astronomical utility functions.

qastutil

Author: Dr Jie Zheng v1.0 2023R

Introduction

Some quick astronomical functions.

Functions

• dec2dms: transfer decimal to sexagesimal deg-min-sec, for Dec
• dec2hms: transfer decimal to sexagesimal hour-min-sec, for RA
• dms2dec: transfer sexagesimal deg-min-sec to decimal, for Dec
• hms2dec: transfer sexagesimal hour-min-sec to decimal, for RA
• coorddec2dms: transfer astropy.coord.dec to deg-min-sec
• coordra2hms: transfer astropy.coord.ra to hour-min-sec
• hour2str: transfer decimal hour to hour-min-sec
• hourangle: computer hour angle between lst and ra
• angle_dis: distance between two angles, result between -180 and +180
• distance: distance between two sphere points
• azalt: az & alt for object (ra, dec) at lat, lst
• mjd: from y, m, d, h, s, s, tz to mjd
• day_of_year: day serial number in given year
• fmst: fast midnight sidereal time
• mjd2: from y, m, d, h, s, s, tz to mjd
• night_len: n of hours from sunset to sunrise
• night_time: sunset and sunrise for given yr, mn, dy, lon, lat, tz
• mjd_of_night: get 4-digit mjd code for the site, using local 18:00
• mjd2hour: Extract hour part from mjd
• sun_action: Get time of sun pass specified altitude, in this night
• airmass: airmass from lat, lst, ra, dec
• lst: get local sidereal time for longitude at mjd, no astropy
• sun_pos: sun position of given mjd
• moon_pos: moon position of given mjd
• moon_phase: moon phase of given mjd, by sun-earth-moon angle
• moon_phase2: moon phase by moon cycle