M
- M — Catalog of Nebulae and Star Clusters (Messier object)
- MACHO — MACHO Project lensing events (Massive Compact Halo Object)
- MACHO-LMC — MACHO Project Large Magellanic Cloud Microlensing
- MACHO-SML — MACHO Project Small Magellanic Cloud Microlensing
- McC — McCormick Observatory Catalog
- MCG — Morphological Catalogue of Galaxies
- MCW — Morgan, Code, and Whitford
- Mel - Melotte Catalogue of Deep Sky Objects
- MPC — Minor Planet Circulars contain astrometric observations, orbits and ephemerides of both minor planets and comets
- MSH — Mills, Slee, Hill - Catalog of Radio Sources
- MW — Mandel-Wilson Catalogue of Unexplored Nebulae, not in SIMBAD yet
Read more about this topic: List Of Astronomical Catalogues