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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.
The Sharpless catalog is a list of 313 H II regions (emission nebulae) intended to be comprehensive north of declination −27°. (It does include some nebulae south of that declination as well.) The first edition was published in 1953 with 142 objects (Sh1), and the second and final version was published by US astronomer Stewart Sharpless in ...
This is a list of sources of light, the visible part of the electromagnetic spectrum.Light sources produce photons from another energy source, such as heat, chemical reactions, or conversion of mass or a different frequency of electromagnetic energy, and include light bulbs and stars like the Sun. Reflectors (such as the moon, cat's eyes, and mirrors) do not actually produce the light that ...
RCW Catalogue. The RCW Catalogue (from R odgers, C ampbell & W hiteoak) is an astronomical catalogue of Hα -emission regions in the southern Milky Way, described in ( Rodgers et al. 1960 ). It contains 182 objects, including many of the earlier Gum catalogue (84 items) objects. The later Caldwell catalogue included some objects from the RCW ...
Caldwell catalogue. Montage of Caldwell Catalogue objects. The Caldwell catalogue is an astronomical catalogue of 109 star clusters, nebulae, and galaxies for observation by amateur astronomers. The list was compiled by Patrick Moore as a complement to the Messier catalogue. [1]
Messier object. The Messier objects are a set of 110 astronomical objects catalogued by the French astronomer Charles Messier in his Catalogue des Nébuleuses et des Amas d'Étoiles ( Catalogue of Nebulae and Star Clusters ). Because Messier was interested only in finding comets, he created a list of those non-comet objects that frustrated his ...
Hubble image of the elliptical galaxy PGC 6240. [1] The Principal Galaxies Catalogue ( PGC) is an astronomical catalog published in 1989 that lists B1950 and J2000 equatorial coordinates and cross-identifications for 73,197 galaxies. It is based on the Lyon-Meudon Extragalactic Database (LEDA), which was originally started in 1983.
The Tycho-2 positions and magnitudes are based on the observations collected by the star mapper of the European Space Agency 's Hipparcos satellite. They are the same observations used to compile the Tycho-1 Catalogue (ESA SP-1200, 1997). However, Tycho-2 is much larger and a bit more precise, because a more advanced reduction technique was used.