Computes the on-sky position angle (East of North) between this SkyCoord and another.

Parameters¶

other|SkyCoord|

The other coordinate to compute the position angle to. It is treated as the “head” of the vector of the position angle.

Returns¶

pa~astropy.coordinates.Angle

The (positive) position angle of the vector pointing from self to other. If either self or other contain arrays, this will be an array following the appropriate numpy broadcasting rules.

Examples¶

>>> c1 = SkyCoord(0*u.deg, 0*u.deg)
>>> c2 = SkyCoord(1*u.deg, 0*u.deg)
>>> c1.position_angle(c2).degree
90.0
>>> c3 = SkyCoord(1*u.deg, 1*u.deg)
>>> c1.position_angle(c3).degree  
44.995636455344844