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RA: 21h 17m 18.7909s
Dec: +58° 36′ 41.345″
Ch: MSA:1073, U2:56, SA:3
Type: reflection nebula
Mag: B=6.58, V=6.432
Size: 11′ x 11′
Ced 191 (+57 2309)
Position (1900): RA 22 14.6, Dec + 58 10
Star: +57 2309 (Mp=6.38, V=6.41, SpT=B3e)
Spectrum of nebula: continuous spectrum (inferred from sp.t. of illuminating star)
Classification: Neb associated with mainly one star (which may be multiple) - star surrounded by a neb envelope without conspicuous structure (eg. lambda Scorpii)
Notes: "+57 2309 = HD 203025 = Boss 29804 nebulous. Source: (88) Pl 82. (92, 93 Pl 47, Pl 49, 366, 630 Pl 19, 715)."
DG 173 = Ced 191
Pos (1950.0) 21:15.9, +58:23
Size: 11x11 (blue), 3x3 (red).
= DG 173, [RK68] 106, VdB 140, GN 21.15.9, Ced 191
Class: C (reflection neb)
Photo index by Jim Lucyk: Vehrenberg's Atlas of Galactic Neb-2 p117
The Messier objects
The Bennett objects
The Caldwell list
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