SDSSMuNu

class pydl.pydlutils.coord.SDSSMuNu(*args, copy=True, representation_type=None, differential_type=None, **kwargs)[source]

Bases: astropy.coordinates.BaseCoordinateFrame

SDSS Great Circle Coordinates

Parameters:
mu : Angle

Angle corresponding to longitude measured along a stripe.

nu : Angle

Angle corresponding to latitude measured perpendicular to a stripe.

Notes

https://www.sdss.org/dr14/algorithms/surveycoords/

Attributes:
stripe

SDSS Stripe Number .

node

Node of the great circle with respect to the celestial equator. In SDSS, this is almost always RA = 95.0 degrees.

incl

Inclination of the great circle with respect to the celestial equator.

phi

Counter-clockwise position angle w.r.t. north for an arc in the +nu direction.

Attributes Summary

default_differential
default_representation
frame_attributes
frame_specific_representation_info
incl
name
node
stripe

Attributes Documentation

default_differential
default_representation
frame_attributes = {'node': <astropy.coordinates.attributes.QuantityAttribute object>, 'stripe': <astropy.coordinates.attributes.Attribute object>}
frame_specific_representation_info
incl
name = 'sdssmunu'
node = <Quantity 95.0 deg>
stripe = 0