CooC - Coordinate Conversions (version 3.0)
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Supergalactic coordinate system
For studies of more distant extragalactic objects, the most natural
coordinate system is supergalactic coordinate system. The reference plane
of this system is defined by Gerard de Vaucouleurs as the plane where
density of galaxies in our environment is the largest.
Supergalactic longitude, SGL, is measured counterclockwise from direction
l = 137.37 deg, b = 0 deg (where l and b are the galactic longitude and
latitude). The values are between 0 and 360 degrees in decimal format
(degrees).
Supergalactic latitude, SGB, is measured from the supergalactic plane,
positive northwards and negative southwards. The values are between -90
and +90 degrees in decimal format (degrees).
For more information on different coordinate systems, please check
the corresponding
encyclopædia article.
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