v20231203

What's Changed

• Add IC4837A by @mattiaverga in #38
• Add 36 galaxies brighter than mag 12 by @mattiaverga in #39
• Add 4 more GCl brighter than mag 12 by @mattiaverga in #40

Full Changelog: v20230218...v20231203

v20230218

• NGC 6302 is also known as Butterfly Nebula
• C41 is also known as Cl 050
• Fix typo in MinAx of NGC2020

v20221023

• A new sources column is added. It specify for each column where the value come from, see NGC_guide.txt for the mapping between the id and the service used.
• Add M102 to addendum as duplicate of M101
• Small fix about spelling of Sculptor Dwarf Elliptical

v20220109

• B-Mag and V-mag for galaxies are now taken from LEDA instead of SIMBAD. Many magnitudes from SIMBAD claimed poor precision ("E" class from "A" - best to "E" - worst), while LEDA magnitudes usually show smaller errors. As usual, where it was decided to maintain SIMBAD values this is annotated in OpenNGC notes column. This also allowed to populate V-Mag column for over a thousand objects more.
• Some objects which are claimed as GPair or GGroup in NED had their classification corrected. Usually these are galaxies with a superposed star which led to a wrong classification. There were also a couple of misidentified galaxies which are double or triple stars.
• Finally, the remaining galaxies which haven't got any diameter or position angle available from LEDA or SIMBAD have been measured from DSS images and I put some rough estimated value myself.

v20211218

• The catalog has been enhanced with the insertion of objects data about parallax, apparent proper motions both in RA and Dec, radial velocity and redshift.
• Some objects lying really close to constellation borders had been previously assigned to the wrong constellation.

🎁 Best wishes for a merry Christmas and a cheerful festive season!

v20211113

• The catalog has undergone a full re-review against Harold Corwin's NGC/IC Positions and Notes. As result, a lot of objects have been re-identified/updated, see the commit history for the long list of changes.
• Some PNs diameters have been updated.

v20210906

• Changed NGC1893 type from GCl to Cl+N
• Added Leo I, Fornax Dwarf and Sculptor Dwarf galaxies to the addendum

v20210815

• added common names to several objects (#25)
• correct duplicate references for IC4222 and IC5327 (#26 - Jean-Sebastien Dieu)

v20210306

• correct constellation attribution for several objects which lie near borders
• add note about Se1 being Serpens Caput and Se2 being Serpens Caudi

v20201004

• Minor fixes to some outlines