Dictionary of Nomenclature of Celestial Objects (Last update: 21-Nov-2022)
Result of query: info cati NGC 4640A$
Details on Acronym: N N (Abbreviation of NGC)
***** Avoid the usage of N, prefer NGC Details on Acronym: NGC NGC (New General Catalog)= (N) = (RNGC)
<<NGC NNNNAA>> (not recognised by Simbad, but found in literature)
Object:(Opt) (SIMBAD class: Unknown = Object of Unknown Nature)
Note:First version in 1888 by Dreyer. Revision in 'The revised new general catalogue of non-stellar objects' 1973, Univ. Arizona Press, Tucson, USA, by Sulentic + Tifft, N=7840. The catalogue is named RNGC.
Notes:Revisions of the positions for NGC objects in the LMC have been published by Morel (ref. 1983MO) (A visual Atlas of the LMC, edit. Mati Morel, Table 4). Corrections for objects in the SMC, by Gordon+Kron 1983, P.A.S.P. 95, Appendix p. 473 . For identifications of NGC and IC numbers in the Magellanic Clouds or in M 33 see Lortet 1986, Astr. Astrophys. Suppl. 64, p. 303-324 for objects in the LMC and SMC, p. 325-328 for objects in M 33. NGC 2000.0: Sinnott, 1988, N=13226 objects (NGC and IC), corrections from several the authors and 700 from Dreyer himself.
Mem. R. Astron. Soc., 49, 1-237 (1888)
A New General Catalogue of Nebulae and Clusters of Stars, being the Catalogue of the late Sir John F.W. Herschel, Bart., revised, corrected, and enlarged.
oAlso contains IC, N=13226 objects in total
o<NGC NNNN> N=7840
=E=Catalogue in electronic form as VII/118=E=Catalogue in electronic form as VII/1 Details on Acronym: RNGC RNGC (Revised New General Catalog)
** catalog: use NGCOriginof the Acronym: L = Found in the literature