SpiceEphemerisTime

class sbpy.time.SpiceEphemerisTime(val1, val2, scale, precision, in_subfmt, out_subfmt, from_jd=False)

Bases: TimeFromEpoch

Number of seconds since J2000.0 epoch.

This is equivalent to the NAIF SPICE Ephemeris Time when the Barycentric Dynamical Time (TDB) scale is used.

Examples

>>> from astropy.time import Time
>>> import sbpy.time
>>>
>>> t = Time("2023-11-21")
>>> print(float(t.et))  
753796869.1828325

>>> t = Time(0, format="et")
>>> print(t.iso)
2000-01-01 12:00:00.000

Attributes Summary

epoch_format
epoch_scale
epoch_val
epoch_val2
name
unit

Attributes Documentation

epoch_format = 'iso'

epoch_scale = 'tdb'

epoch_val = '2000-01-01 12:00:00'

epoch_val2 = None

name = 'et'

unit = 1.1574074074074073e-05