solarterms

This small python programme is to accurately calculate the times (to millisecond) of 24 solar terms using JPL HORIZONS. 本python程式利用噴射推進實驗室的HORIZONS网上天文数据精确计算24节气时间（精确到毫秒）。

Installation

Install Python 3 (and its pip) and download the whole repository to your computer.

Install required python packages using the following command

pip install -r requirements.txt

Usage

For usage, please see test.py. An example of running the test.py is listed below, where solar terms are different from those in the Northern Hemisphere.

$ python test.py                                                                                                                                                         
Calculating solar terms from JPL HORIZONS data. Please wait...
Solar terms for 2021 will be (in the timezone of Australia/Sydney):
           datetime           ObsEclLon         term        
----------------------------- --------- --------------------
2021-Jan-05 14:23:26.864 AEDT     285.0           Minor Heat
2021-Jan-20 07:39:52.788 AEDT     300.0           Major Heat
2021-Feb-04 01:58:48.889 AEDT     315.0      Start of Autumn
2021-Feb-18 21:43:59.456 AEDT     330.0          End of Heat
2021-Mar-05 19:53:42.094 AEDT     345.0            White Dew
2021-Mar-20 20:37:29.732 AEDT       0.0       Autumn Equinox
2021-Apr-04 23:35:07.429 AEST      15.0             Cold Dew
2021-Apr-20 06:33:25.196 AEST      30.0                Frost
2021-May-05 16:47:11.678 AEST      45.0      Start of Winter
2021-May-21 05:37:08.063 AEST      60.0           Minor Snow
2021-Jun-05 20:52:07.232 AEST      75.0           Major Snow
2021-Jun-21 13:32:11.008 AEST      90.0      Winter Solstice
2021-Jul-07 07:05:29.830 AEST     105.0           Minor Cold
2021-Jul-23 00:26:26.821 AEST     120.0           Major Cold
2021-Aug-07 16:53:59.535 AEST     135.0      Start of Spring
2021-Aug-23 07:34:59.830 AEST     150.0       Spring Showers
2021-Sep-07 19:52:57.303 AEST     165.0 Awakening of Insects
2021-Sep-23 05:21:06.456 AEST     180.0       Spring Equinox
2021-Oct-08 12:39:03.184 AEDT     195.0      Pure Brightness
2021-Oct-23 15:51:11.137 AEDT     210.0           Grain Rain
2021-Nov-07 15:58:46.720 AEDT     225.0      Start of Summer
2021-Nov-22 13:33:44.844 AEDT     240.0           Grain Buds
2021-Dec-07 08:57:04.838 AEDT     255.0         Grain in Ear
2021-Dec-22 02:59:19.364 AEDT     270.0      Summer Solstice

A second example is in Tokyo time and Japanese term names for 2020:

$ LANGUAGE=ja python test.py 2020 Asia/Tokyo  
Calculating solar terms from JPL HORIZONS data. Please wait...
Solar terms for 2020 will be (in the timezone of Asia/Tokyo):
          datetime          ObsEclLon term
--------------------------- --------- ----
2020- 1-06 06:30:07.610 JST     285.0   小寒
2020- 1-20 23:54:41.322 JST     300.0   大寒
2020- 2-04 18:03:21.051 JST     315.0   立春
2020- 2-19 13:57:01.327 JST     330.0   雨水
2020- 3-05 11:56:54.422 JST     345.0   啓蟄
2020- 3-20 12:49:38.258 JST       0.0   春分
2020- 4-04 16:38:11.359 JST      15.0   清明
2020- 4-19 23:45:30.125 JST      30.0   穀雨
2020- 5-05 09:51:24.482 JST      45.0   立夏
2020- 5-20 22:49:18.348 JST      60.0   小満
2020- 6-05 13:58:27.000 JST      75.0   芒種
2020- 6-21 06:43:42.000 JST      90.0   夏至
2020- 7-07 00:14:28.509 JST     105.0   小暑
2020- 7-22 17:36:53.554 JST     120.0   大暑
2020- 8-07 10:06:12.481 JST     135.0   立秋
2020- 8-23 00:44:56.973 JST     150.0   処暑
2020- 9-07 13:08:04.000 JST     165.0   白露
2020- 9-22 22:30:40.122 JST     180.0   秋分
2020-10-08 04:55:16.859 JST     195.0   寒露
2020-10-23 07:59:33.412 JST     210.0   霜降
2020-11-07 08:13:56.344 JST     225.0   立冬
2020-11-22 05:39:46.517 JST     240.0   小雪
2020-12-07 01:09:31.406 JST     255.0   大雪
2020-12-21 19:02:21.440 JST     270.0   冬至

zhao95/24jieqi_py

solarterms

Installation

Usage