Dictionary of Nomenclature of Celestial Objects (Last update: 23-Jul-2021)
Result of query: info cati NBGG$
Details on Acronym: NBGG NBGG (Nearby Group of G)= (T)
Write:<<NBGG xx+yy +zz>>
Object:Group of G (SIMBAD class: GroupG = Group of Galaxies)
Note:Group of galaxies from the NBG catalog. format: a galaxy is assigned to structure identified by 3 two digits numbers: The galaxy is in the xx cloud or spur, the -yy group or +yy first-level assoc., and the +zz second-level assoc. xx : first digit from 7 general regions. Second digit = 0 for a galaxy in a region which cannot be associated with any cloud yy : If the galaxy is not in a group or association yy = 0 zz : If zz not given, then zz is assumed to be the same as |yy| See also NBG: NBG galaxies are members of 36 clouds, 254 associations and 336 groups of two or more members.
Astrophys. J., 321, 280-304 (1987)
Nearby groups of galaxies. II. An all-sky survey within 3000 kilometers per second.
oTable 2: <NBGG xx+yy +zz> N=340
=E=Catalogue in electronic form as VII/145Originof the Acronym: S = Created by Simbad, the CDS Database Details on Acronym: T T (Tully)
***** Avoid the usage of T, prefer NBGGOriginof the Acronym: L = Found in the literature