companion_relative_to_absolute_position

breads.utils.companion_relative_to_absolute_position(star_name, comp_name, comp_sep, comp_pa, obs_date, verbose=True)

Compute absolute ICRS coordinates of a substellar companion at a given date

• Retrieves the host star’s coordinates (including RA, Dec, proper motion, and parallax)

• Propagates to the desired date

• Performs coordinate offset to the companion location

• Prints out the results, in format suitable to enter into APT

Parameters:

star_namestr

Star name, resolvable by SIMBAD

comp_namestr

Companion name, for display

comp_sepastropy.units.Quantity

Separation of the companion relative to the host, for instance in arcseconds

comp_paastropy.units.Quantity

Position angle of the companion relative to North, for instance in degrees east of north

obs_datestr or astropy.time.Time

Observation epoch, in a format understandable by astropy.time

verbosebool

Be more verbose in output?

Returns:

planet_coordastropy.coordinates.SkyCoord

Computed absolute ICRS coordinates of the companion at the specified epoch