TimeJD#

class astropy.time.TimeJD(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)[source]#

Bases: TimeNumeric

Julian Date time format.

This represents the number of days since the beginning of the Julian Period. For example, 2451544.5 in JD is midnight on January 1, 2000.

Attributes Summary

in_subfmt

jd1

jd2

name

out_subfmt

precision

scale

Time scale.

subfmts

value

Return time representation from internal jd1 and jd2.

Methods Summary

fill_value(subfmt)

Return a value corresponding to J2000 (2000-01-01 12:00:00) in this format.

set_jds(val1, val2)

Set internal jd1 and jd2 from val1 and val2.

to_value([jd1, jd2, parent, out_subfmt])

Return time representation from internal jd1 and jd2.

Attributes Documentation

in_subfmt#
jd1#
jd2#
name = 'jd'#
out_subfmt#
precision#
scale#

Time scale.

subfmts = (('float', <class 'numpy.float64'>, None, <ufunc 'add'>), ('long', <class 'numpy.longdouble'>, <function longdouble_to_twoval>, <function twoval_to_longdouble>), ('decimal', <class 'numpy.object_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('str', <class 'numpy.str_'>, <numpy.vectorize object>, <numpy.vectorize object>), ('bytes', <class 'numpy.bytes_'>, <numpy.vectorize object>, <numpy.vectorize object>))#
value#

Return time representation from internal jd1 and jd2. Subclasses that require parent or to adjust the jds should override this method.

Methods Documentation

classmethod fill_value(subfmt)#

Return a value corresponding to J2000 (2000-01-01 12:00:00) in this format.

This is used as a fill value for masked arrays to ensure that any ERFA operations on the masked array will not fail due to the masked value.

set_jds(val1, val2)[source]#

Set internal jd1 and jd2 from val1 and val2. Must be provided by derived classes.

to_value(jd1=None, jd2=None, parent=None, out_subfmt=None)#

Return time representation from internal jd1 and jd2. Subclasses that require parent or to adjust the jds should override this method.