An astronomical catalogue is a list or tabulation of astronomical objects, typically grouped together because they share a common type, morphology, origin, means of detection, or method of discovery. Astronomical catalogs are usually the result of an astronomical survey of some kind. 0–9 0ES — Einstein Slew Survey, version 0 1A, 2A, 3A — Lists of X-ray sources from the Ariel V satellite 1C — First Cambridge Catalogue of Radio Sources 1ES — Einstein Slew Survey 1FGL, 2FGL — Lists of gamma-ray sources from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope 1RXH — ROSAT HRI Pointed Observations 1RXS — ROSAT All-Sky Bright Source Catalogue, ROSAT All-Sky Survey Faint Source Catalog 1SWASP — SuperWASP 2A — see 1A 2C — Second Cambridge Catalogue of Radio Sources 2E — The Einstein Observatory Soft X-ray Source List 2MASS — Two Micron All Sky Survey 2MASP — Two Micron All Sky Survey, Prototype 2MASSI — Two Micron All Sky Survey, Incremental release 2MASSW — Two Micron All Sky Survey, Working database 2MUCD — Ultracool Dwarfs from the 2MASS Catalog 2MASX — Two Micron All Sky Survey, Extended source catalogue 2MASS-GC (Globular Clusters, I.R.) (2MASS-GC 01 and 2MASS-GC 02 are Hurt 1 and Hurt 2) (source: Bruno Alessi) 3A — see 1A 3C (and 3CR) — Third Cambridge Catalogue of Radio Sources (and revised) 4C — Fourth Cambridge Survey of celestial radio sources 5C — Fifth Cambridge Survey of Radio Sources 6C — Sixth Cambridge Survey of radio sources 7C — Seventh Cambridge Survey 8C — Eighth Cambridge Survey 8pc — 8 parsec listing, all stars within 8 parsec 9C — Ninth Cambridge survey at 15GHz A AB - Azzopardi / Breysacher (Wolf-Rayet stars in the Small Magellanic Cloud, SMC) Abel (globular star clusters) Abell — Abell catalogue Abetti - Giorgio Abetti (double stars) Abt - (for example: open star cluster Abt 1 = Biurakan 4 = Markarian 6) AC — Astrographic Catalogue A.C. - Alvan Clark (double stars) Ac / Ack - Agnès Acker (planetary nebulae) A.G.C. - Alvan Graham Clark (double stars) AGC - Arecibo General Catalog ADS — Aitken Double Star Catalogue AFGL - Air Force Geophysical Laboratory Ag - Aguero (catalogue of peculiar galaxies, captured during the Palomar Sky Survey) AG, AGK, AGKR — Astronomische Gesellschaft Katalog AH03 - (star clusters) (source: Bruno Alessi's list) Al - Allen (planetary nebulae) Alden - H.L. Alden (double stars) Alessi