Dictionary of Nomenclature of Celestial Objects

rchy 3 is denoted by a lowercase letter, format 'NNANa', Thus the name of an individual condensation might be 'GF 3A1b', which is the second sub-subfragment (b) inside the first subfragment (1) inside the first fragment (A) of the globular filament 3.
Identif. charts
Ref:=1979ApJS...41...87S
bySCHNEIDER S. , ELMEGREEN B.G.
 Astrophys. J., Suppl. Ser., 41, 87-95 (1979)
  A catalog of dark globular filaments.
oTable 3: <GF NN> (Nos 1-23). Plates 1-20: <GF NNA> N=90, <GF NNAN> N=109, <GF NNAa> N=6, <GF NNANa> N=32.

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