Contents within planetarium

• 164 open clusters
• 80 globular clusters
• 1 galaxy

Overlap with other object catalogs

• 222 New General Catalogue (NGC)
• 156 Collinder catalog
• 54 Messier objects
• 36 Caldwell objects
• 10 Index Catalogue (IC)
• 2 Lynds' catalogue of bright nebulae
• 1 Uppsala General Catalog of galaxies (UGC)
• 1 Principal Galaxies Catalogue
• 1 PK planetary nebulae

Reference

• https://ui.adsabs.harvard.edu/abs/1915MmRAS..60..175M/abstract

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