2023-12-13 (MD): Updated to upstream commit 1739 7545, which added a few objects and
fixed some minor mistakes.
2022-06-13 (MD): Updated to upstream commit 4ffc 6be0, which adds proper motions and
radial velocities/redshifts to many objects.
2021-12-29 (MD): Updated to upstream commit da4b 5cb1, which improves the presentation
of the sources of the data.
2021-11-15 (MD): Updated to upstream commit 3ae3ee5, containing numerous fixes after a
comparison with Harold Corwin's notes.
2020-05-19 (MD): Updated to v20200329; also adding the first outlines as MOCs
2019-10-21 (MD): Updated to v20191019
2019-09-23 (MD): Updated to v20190920
2019-06-11 (MD): Updated to v20190609
Description
OpenNGC is a database containing positions and main data of NGC (New
General Catalogue) and IC (Index Catalogue) objects. It has been built
by merging data from NED, HyperLEDA, SIMBAD, and several databases
available at HEASARC.In this VO publication, we have changed most of the column names,
mostly to make them work as ADQL column names without resorting to
delimited identifiers. The mapping should be obvious.