Dictionary of Nomenclature of Celestial Objects

'20' and '21' in literature.
Ref:=1964MeLu2.139....1L
byLYNGA G.
 Lund Medd. Astron. Obs. Ser. II, 139, 1-None (1964)
  Studies of the Milky Way from Centaurus to Norma. I. UBV photometry.
oTable 5: Sequence stars not in a cluster are not in SIMBAD. In NGC 5749 stars 'a' and 'b' have been numbered '20' and '21'.
oTable 5, Figs: <NGC 5749 NN> (Nos 1-18-20-21), <CL LYNGA 7 NN> (Nos 1-38), <CL* Hogg 10 L N> (Nos 1-3), <CL* NGC 5606 L NN> (Nos 1-15), <CL* Lynga 3 L NN> (Nos 1-25), <CL Pismis NN> (Nos 1-24).

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