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IC 4954 (16,020 of 18,816)

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IC 4954

IC 4954, Ced 175, DG 160, LBN 153, LBN 066.95-01.30

RA: 20h 04m 48s
Dec: +29° 15′ 0″

Con: Vulpecula
Ch: MSA:1171, U2:119, SA:9

Ref: SIMBAD

(reference key)

Type: bright nebula (HII region)

Mag: B=?, V=?

Size: 5′ x 5′
PA: ?

Published comments

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

Ced 175a (IC 4954,5a)

Position (1900): RA 20 0.7, Dec + 28 58

Star: Anon (Mp=13.7, V=13.3, SpT=B6)

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)

Size: 1'x1'

Notes: "IC 4954 + IC 4955. Disc. Barnard. WP 178. R. The subdivisions a, b, and c are according to Hubble (366)."

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

Ced 175b (IC 4954,5b)

Position (1900): RA 20 0.7, Dec + 28 58

Star: Anon (Mp=12.2, V=11.8, SpT=B6)

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)

Size: 1'x1'

Notes: "IC 4954 + IC 4955. Disc. Barnard. WP 178. R. The subdivisions a, b, and c are according to Hubble (366)."

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

Ced 175c (IC 4954,5c)

Position (1900): RA 20 0.7, Dec + 28 58

Star: Anon (Mp=14.4, V=14.1, SpT=A3)

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)

Size: 0.5'x0.5'

Notes: "IC 4954 + IC 4955. Disc. Barnard. WP 178. R. The subdivisions a, b, and c are according to Hubble (366)."

Dorschner & Gürtler (1963)

Untersuchungen uber Reflexionsnebel.

DG 160

= IC 4954, IC 4955, Ced 175

Pos (1950.0) 20:02.7, +29:06

Size: 5x5 (blue), 5x5 (red).

Lynds, B.T. (1965)

(Astrophysical Journal Supplement, No 105, 1965) in her Catalogue of Bright Nebulae notes that this isolated nebula is considerably bright, more prominent on the blue POSS plate and has a maximum size of 1' x 3'.

Photo index

by Jim Lucyk: Vehrenberg's Atlas of Galactic Neb-2 p75.

Modern observations

Rajanen, Petteri (1993)

Petteri Rajanen (Kauppi, Tampere, Finland) observing with a 8-inch f/5 at x76, writes in The Webb Society Nebulae and Clusters Section Report No. 11, January 1993: " IC 4954-5. Reflection nebula. Fairly steady with averted vision at x38 + Deep-Sky Filter; edges rather well-defined. A few stars embedded. Moon [almost full] troublesome. (x38+DSF)."

Brian Skiff

IC 4955, Roslund 4

Racine: V=10.0 (for cluster of 13 *s), brtst * V=11.6. wide pair V=11.6,11.8. arc of three V ~12-12.5.

POSS: NWrn section nr pair = -54, SErn part = -55. m11.8 * is close pair: V=11.8,13.1; 10"; 160. neb is somewhat brtr on E print.

15cm - diffuse, unconcen, rel f neb 12' diam. a wkly concen cl superposed: brtr *s on NW & W, which are specifically a m11 pair and an arc of three (m12-13). UHC filter not much help, DS filter not useful at all. BS, 11May1988, Texas Star Party.

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