Dictionary of Nomenclature of Celestial Objects
(Last update: 15-Feb-2018)

Result of query: info cati D61] Vir$



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Details on Acronym:   [D61]
   [D61] (De Vaucouleurs, 1961) Write:<<[D61] Cloud Wa>>
<<[D61] Cloud AWW>>
<<[D61] Cloud W'>>
<<[D61] Vir R>> N: 7+5+3 Object:Group of G  (SIMBAD class: GroupG = Group of Galaxies) Stat:is completely incorporated in Simbad Note:Structure of the Virgo cluster region.
The designation 'Cloud' is used for group of galaxies, and often found in literature as 'W Cloud' instead of 'Cloud W'.
The Virgo cluster itself may consist of 2 overlapping, but separate clouds Cloud S and Cloud E, and the 'Virgo Wing' or Cloud W.
These clouds are divided in sub-groups S', Wa, Wb, W'.
A Southern Extension of Virgo cluster is designated as 'Vir II' containing Clouds V, X, Y.
Vir I, II, III represent 3 groups of galaxies: Vir I = Virgo cluster proper. Vir II = Virgo Southern Extension. Vir III = NGC 5846+NGC 5713+NGC 5566.
See also [FFS84], BTS87. in source:NAME Virgo Cluster Ref:=1961ApJS....6..213D byDE VAUCOULEURS G. Astrophys. J., Suppl. Ser., 6, 213-234 (1961) Structure of the Virgo cluster of galaxies. oFig.3, Tables 6, 7: <[D61] Cloud Wa> (Nos E, S, W, Wa, Wb), <[D61] Cloud W'> (Nos S', W'), <[D61] Cloud AWW> (Nos X, V, Y, XNW, XSE). Ref:=1973A&A....28..109D byDE VAUCOULEURS G. , DE VAUCOULEURS A. Astronomy and Astrophysics, volume 28, 109-118 (1973) Apparent distribution and velocities of galaxies in the Virgo cluster and its surroundings. oFig.1: <[D61] Cloud A> (Nos V, Y), <[D61] Vir R> (Nos I-III). Originof the Acronym: S = Created by Simbad, the CDS Database

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