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IC 4601 (13,654 of 18,816)

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IC 4601

IC 4601, Ced 129b, DG 134, DG 135

RA: 16h 20m 18s
Dec: −20° 04′ 54″

Con: Scorpius
Ch: MSA:1373, U2:336, SA:22

Ref: SIMBAD, Corwin (2004)

(reference key)

Type: bright nebula

Mag: B=?, V=?

Size: ?
PA: ?

History and Accurate Positions for the NGC/IC Objects (Corwin 2004)

IC 4601. The NGC RA is 20 seconds of time too large. I thought at first that this was a problem with Stewart's position having been combined with Barnard's, but Stewart's is quite accurate. Barnard's is only another nine seconds to the east, so Dreyer has made some small additional error.

Whatever happened, the position and identification of the nebula is not in doubt. See IC 4591 for more on the vast and wonderful complex of nebulosity around rho Ophiuchi.

Published comments

Helwan Obs. Bulletin No 38 (1935)

F, 12'x5', vmE 60deg, diffuse nebulosity about BD-19°4359 4361.

Cederblad, S. (1946) [VII/231]

Ced 129b (IC 4601a)

Position (1900): RA 16 14.2, Dec - 19 48

Star: -19 4358/9 (Mp=7.1, V=7.0, SpT=B9, A0)

Spectrum of nebula: continuous spectrum (observed)

Classification: Neb associated with mainly one star (which may be multiple) - star surrounded by a neb envelope without conspicuous structure (eg. lambda Scorpii)

Size: 22'x15'

Notes: "Ced 129 The nebulous stars in the region of IC 4601. R. The designations IC 4601 a and b are according to Hubble (366). No 129 may be connected with No 128, although the latter gives the impression of being situated in the foreground. Ced 129 b = IC 4601 a = -19 4358,9 = HD 147009,10 = Boss 21958,60. Disc. Barnard. Independently found by Stewart in 1908 (852). FA 84. WP 195. (61, 88 Pl 35, 93 Pl 12 Pl 13, 196, 366, 630 Pl 2 Pl 5, 715)."

 

Ced 129c (IC 4601b)

Position (1900): RA 16 14.7, Dec - 19 53

Star: -19 4361 (Mp=7.1, V=7.10, SpT=B8, A0)

Spectrum of nebula: continuous spectrum (observed)

Classification: Neb associated with mainly one star (which may be multiple) - star surrounded by a neb envelope without conspicuous structure (eg. lambda Scorpii)

Size: 22'x15'

Notes: "Ced 129 The nebulous stars in the region of IC 4601. R. The designations IC 4601 a and b are according to Hubble (366). No 129 may be connected with No 128, although the latter gives the impression of being situated in the foreground. 129 c = IC 4601 b = -19 4361 = HD 174103,4 = Boss 21967,8. R. Compare 129 b."

Dorschner & Gürtler (1963)

Untersuchungen uber Reflexionsnebel.

DG 134

= IC 4601A, Ced 129b

Pos (1950.0) 16:17.2, −19:56

Size: (not measured on blue), 5x5 (red).

 

DG 135

= IC 4601B, Ced 129c

Pos (1950.0) 16:17.7, −20:01

Size: 22x20 (blue), 6x6 (red).

Bernes, C. (1977)

Bernes, C. (1977) A catalogue of bright nebulosities in opaque dust clouds.

= Bernes 156

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