Supergalactic coordinate system
type: Concept
contributor: AAS Frey.Katie
modified: 2020-11-19T16:27:39.78Z
modified: 2020-11-19T16:27:49.463Z
broader: Astronomical coordinate systems
definition: A spherical coordinate system in which the equator is the supergalactic plane. Supergalactic longitude, SGL, is measured counterclockwise from direction l = 137.37 deg, b = 0 deg (between 0 and 360 deg). The zero point for supergalactic longitude is defined by the intersection of this plane with the Galactic plane. In the equatorial coordinate system (J2000) this is approximately 2.82 h, +59.5 deg. Supergalactic latitude, SGB, is measured from the supergalactic plane, positive northward and negative southward. The North Supergalactic Pole (SGB=90 deg) lies at galactic coordinates l = 47.37 deg, b = +6.32 degrees, corresponding to the equatorial coordinate system (J2000) 18.9 h, +15.7 deg.
narrower: Supergalactic longitude
narrower: Supergalactic latitude

Supergalactic latitude
type: Concept
broader: Supergalactic coordinate system

Supergalactic longitude
type: Concept
broader: Supergalactic coordinate system

Astronomical coordinate systems
type: Concept
narrower: Supergalactic coordinate system