The Arp's catalog of peculiar galaxies
Contents within planetarium
- 203 galaxy clusters
- 133 galaxies
- 1 star
- 1 nebula
Overlap with other object catalogs
- 110 Uppsala General Catalog of galaxies (UGC)
- 99 Principal Galaxies Catalogue
- 89 New General Catalogue (NGC)
- 16 Hickson's Compact Groups of Galaxies (HCG) Catalog
- 15 Index Catalogue (IC)
- 14 Markarian galaxies
- 8 Messier objects
- 2 Uppsala General Catalog of galaxies addendum (UGCA)
- 2 Caldwell objects