NGC / IC / Messier Catalog

"OpenNGC is a database containing positions and main data of NGC (New General Catalogue) and IC (Index Catalogue) objects. Unlike other similar databases which are released with license limitations, OpenNGC is released under CC-BY-SA-4.0 license, which allows the use for a wider range of cases. github.com/mattiaverga/OpenNGC Data Sources OpenNGC has been built by merging data from: NASA/IPAC Extragalactic Database ned.ipac.caltech.edu/ This research has made use of the NASA/IPAC Extragalactic Database (NED) which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration.

HyperLEDA database leda.univ-lyon1.fr We acknowledge the usage of the HyperLeda database ( leda.univ-lyon1.fr ) SIMBAD Astronomical Database simbad.u-strasbg.fr/simbad/ This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France HEASARC High Energy Astrophysics Science Archive Research Center heasarc.gsfc.nasa.gov/ We used several databases from HEASARC such as mwsc, lbn, plnebulae, lmcextobj and smcclustrs."