儒略日相关换算以及Python实现

数学公式

函数

import time

def YMD_to_MJD(gmt_time):
    moudle0 = int((gmt_time.tm_mon-14)/12)
    module1 = int((1461/4)*(gmt_time.tm_year + 4800 + moudle0))
    moudle2 = int((367/12)*(gmt_time.tm_mon - 2 - 12*moudle0))
    moudle3 = int((3/4)*int((gmt_time.tm_year + 4900 + moudle0) / 100 ))

    all = 24 * 60 * 60 #一个太阳日包含的秒数
    now = gmt_time.tm_hour * 60 * 60 + gmt_time.tm_min * 60 + gmt_time.tm_sec

    JD = gmt_time.tm_mday - 32075 + module1 + moudle2 - moudle3 - 0.5
    MJD = JD - 2400000.5

    return MJD + now / all

print(YMD_to_MJD(time.gmtime()))

模块

使用julian模块

# 年月日转儒略日
from datetime import datetime
import julian

JD = julian.to_jd(datetime.utcnow(),fmt="mjd")
print(JD)

参考内容

1. 王大轶著. 航天器多源信息融合自主导航技术[M]. 北京：北京理工大学出版社, 2018.03
2. https://pypi.org/project/julian/