如何在python中将J2000时间转换为UTC?

如果你想使用 astropy 你可以用 Time and TimeDelta from astropy.time :

>>> from astropy.time import TimeDelta, Time
>>> from astropy import units as u
>>> (Time(2000, format='jyear') + TimeDelta(559889620.293*u.s)).iso
'2017-09-28 16:53:35.293'

这个 Time(2000, format='jyear')

timedelta 到一个基地 datetime .

import datetime
datetime.datetime(2000, 1, 1, 12, 0) + datetime.timedelta(seconds=559889620.293)

datetime.datetime(2017, 9, 28, 16, 53, 40, 293000)

偏移量是恒定的,因此您可以只添加它:

>>> OFFSET = datetime(2000,1,1,12) - datetime(1970,1,1)
>>> datetime.utcfromtimestamp(559889620.293) + OFFSET
datetime.datetime(2017, 9, 28, 16, 53, 40, 293000)