This feature allows to query a catalogue by specifying a center coordinate and a searching radius. Several coordinate systems are available and for some, an equinox can be specified. A small window appears where one can change. Position is assumed to be in degrees for both longitute and latitude. S for supergalactic coordinates.
Position is assumed to be in degrees for both longitute and latitude.
E for ecliptic coordinates. The equinox can also be specified in this case. The default assumed for the equinox is 2000. Position is assumed to be in degrees for both longitute and latitude. B for Equatorial coordinates based on FK4.