TimeEpochDate#

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

Base class for support of Besselian and Julian epoch dates.

Attributes Summary

`in_subfmt`
`jd1`
`jd2`
`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`(**kwargs)	Return time representation from internal jd1 and jd2.

Attributes Documentation

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>))#

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(**kwargs)[source]#: Return time representation from internal jd1 and jd2. Subclasses that require parent or to adjust the jds should override this method.