We use the category "modern" for the constellations that have been defined by the IAU in the 1920s

• 1922 names and abbreviations
• 1925 border lines suggested
• 1928 border lines accepted
• 1930 Delporte's Atlas Céleste appeared

and for the star names that have been applied to stars with approved spelling since 2016 and that now make up the IAU-Catalog of Star Names.