これは日々の作業を通して学んだことや毎日の生活で気づいたことをを記録しておく備忘録である。
HTML ファイル生成日時: 2024/12/23 15:49:04.419 (台灣標準時)
astroplan を使って、月齢を調べるには以下のようにすればよいようでござる。
#!/usr/pkg/bin/python3.9 # # Time-stamp: <2022/07/03 11:58:44 (CST) daisuke> # # importing argparse module import argparse # importing numpy module import numpy # importing astropy module import astropy.units import astropy.time import astropy.coordinates # importing astroplan module import astroplan # units unit_m = astropy.units.m unit_rad = astropy.units.rad unit_deg = astropy.units.deg # constructing parser object desc = "finding moonrise/moonset time" parser = argparse.ArgumentParser (description=desc) # adding arguments parser.add_argument ('-l', '--longitude', default='+121d11m12s', \ help='longitude of observing site in format "+121d11m12s"') parser.add_argument ('-b', '--latitude', default='+24d58m12s', \ help='latitude of observing site in format "+24d58m12s"') parser.add_argument ('-a', '--altitude', type=float, default=151.6, \ help='altitude above sea-level in metre') parser.add_argument ('-t', '--datetime', default='2000-01-01T12:00:00.000', \ help='date/time in UT in "YYYY-MM-DDThh:mm:ss.sss" format') # command-line argument analysis args = parser.parse_args () # input parameters site_lon = args.longitude site_lat = args.latitude site_alt = args.altitude * unit_m datetime_str = args.datetime # printing input parameters print ("#") print ("# input parameters") print ("#") print ("# Location:") print ("# longitude =", site_lon) print ("# latitude =", site_lat) print ("# altitude =", site_alt) print ("# Date/Time:") print ("# date/time (UT) =", datetime_str) print ("#") # location object location = astropy.coordinates.EarthLocation.from_geodetic \ (site_lon, site_lat, site_alt) # observer object observer = astroplan.Observer (location=location, name="observer", \ timezone="UTC") # time object datetime = astropy.time.Time (datetime_str, scale='utc') # illumination illumination = observer.moon_illumination (datetime) # moon phase phase = observer.moon_phase (datetime) print ("Moon on %s" % datetime) print (" illumination = %f" % illumination) print (" moon phase = %s = %s" \ % (phase, phase / numpy.pi * 180.0 / unit_rad * unit_deg) )
実行してみると、以下のようになるでござる。
% ./astroplan_sample_11.py -h usage: astroplan_sample_11.py [-h] [-l LONGITUDE] [-b LATITUDE] [-a ALTITUDE] [-t DATETIME] finding moonrise/moonset time optional arguments: -h, --help show this help message and exit -l LONGITUDE, --longitude LONGITUDE longitude of observing site in format "+121d11m12s" -b LATITUDE, --latitude LATITUDE latitude of observing site in format "+24d58m12s" -a ALTITUDE, --altitude ALTITUDE altitude above sea-level in metre -t DATETIME, --datetime DATETIME date/time in UT in "YYYY-MM-DDThh:mm:ss.sss" format % ./astroplan_sample_11.py -t 2022-06-29T16:00:00 # # input parameters # # Location: # longitude = +121d11m12s # latitude = +24d58m12s # altitude = 151.6 m # Date/Time: # date/time (UT) = 2022-06-29T16:00:00 # Moon on 2022-06-29T16:00:00.000 illumination = 0.003958 moon phase = 3.015691855831205 rad = 172.78641565110277 deg % ./astroplan_sample_11.py -t 2022-07-03T16:00:00 # # input parameters # # Location: # longitude = +121d11m12s # latitude = +24d58m12s # altitude = 151.6 m # Date/Time: # date/time (UT) = 2022-07-03T16:00:00 # Moon on 2022-07-03T16:00:00.000 illumination = 0.180964 moon phase = 2.262788807999506 rad = 129.64824862781006 deg % ./astroplan_sample_11.py -t 2022-07-13T16:00:00 # # input parameters # # Location: # longitude = +121d11m12s # latitude = +24d58m12s # altitude = 151.6 m # Date/Time: # date/time (UT) = 2022-07-13T16:00:00 # Moon on 2022-07-13T16:00:00.000 illumination = 0.998382 moon phase = 0.08048014233055935 rad = 4.611172490153212 deg