Source code for sunpy.time.julian

from __future__ import absolute_import

from astropy.time import Time
from sunpy.time import parse_time

__all__ = ['julian_day', 'julian_centuries']


[docs]def julian_day(t='now'): """ Wrap a UTC -> JD conversion from astropy. """ return Time(parse_time(t)).jd
[docs]def julian_centuries(t='now'): """Returns the number of Julian centuries since J1900.0 (noon on 1900 January 0).""" DAYS_IN_JULIAN_CENTURY = 36525.0 # J1900.0 is 2415021.0 return (julian_day(t) - 2415020.0) / DAYS_IN_JULIAN_CENTURY