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IC 1274 (14,963 of 18,816)

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IC 1274

IC 1274, LBN 33, LBN 007.35-02.33, ESO 521-41A

RA: 18h 09m 51s
Dec: −23° 38′ 54″

Con: Sagittarius
Ch: MSA:1392, U2:339, SA:22

Ref: Corwin (2004), Skiff20080430-U

(reference key)

Type: bright nebula

Mag: B=?, V=?

Size: 20′ x 5′
PA: ?

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

IC 1274 and IC 1275 are both reflection nebulae sketched by Barnard from a plate he took at Lick in the 1890's. The published sketch (in AN 3111), with BD stars identified on it, is accurate and identifies the nebulae exactly.

Historical observations

Barnard, E.E. (1892)

Barnard, E. E. (1892) "Photographic nebulosities and groups of nebulous stars", A.N. 3111.

Discussed: IC 1274, 1275, 1283, 1287,

This nebula was discovered photographically by Barnard. He described it as "three stars 8.5 to 9th magnitudes in pretty large nebulosity."

Published comments

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

Ced 154d (IC 1274)

Position (1900): RA 18 3.7, Dec - 23 41

Star: -23 13997 (Mp=9.08, V=9.10, SpT=B1)

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: 9'x7.5'

Notes: "Ced 154 The group of nebulous stars following M 8. R. There has been some confusion in the literature as to the proper identification of these objects. Ced 154 d = IC 1274. Disc. Barnard 1892 (51). R. Hubble (366) divides this nebula into two parts: IC 1274 a = -23 13997 nebulous, to which the stellar data and log a_1_, in the present catalogue refer. In (366) the photographic magnitude is given as 8.7m. IC 1274 b = -23 13998 nebulous. R. (366) gives log a_1_, 0.398 and m_p_ = 9.2. In (664): m_p_ = 8.45, m_v_=8.56. HD gives m_p_ =8.3, m_v_ = 9.0. The nebula IC 1274 is probably to be considered as one entity illuminated by the stars -23 13997, 13998, 13999, 14002, and 14004. (Compare (88) Pl 52). (717)."

Bernes, C. (1977)

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

Bernes 7 = NGC 6559 / IC 1274 / IC 1275 / IC 4685.

Gum, C.S. (1955)

Gum, C.S. (1955) A survey of southern HII regions. Mem.RAS, 67. [1955MmRAS..67..155G]

notes: "The objects Sharpless 29 (= IC 1274) and Sharpless 30 (= IC 1275) are small detached brighter parts at the edge of [Gum] 75." He notes that Gum 75 is "Almost joined to Gum 72 (M8). The separation from M8 appears to be due to a lane of foreground obscuration. A number of 'nebulous' stars and reference to large faint patches of nebulosity corresponding to bright condensations in this region are given by IC 1274, 1275, 4681, 4684 and 4685 (Nos. 154b, c, d, e and f in the Catalogue of Cederblad)." This bright emission nebula is part of Bernes 7, a complex consisting of NGC 6559, IC 1274, IC 1275 and IC 4685.

Lynds, B.T. (1965)

(Astrophysical Journal Supplement, No 105, 1965) in her Catalogue of Bright Nebulae, notes that this nebula is bright, more prominent on the red POSS plate has a maximum size of 20' x 5'.

Helwan Obs. Bulletin No 38 (1935)

F, diffuse nebulosity 5'x5', round 3 stars, edge of plate.

Modern observations

Bahr-Vollrath, Gerd (1992)

(Noosa Heads, Queensland, Australia) observing with an 8-inch f/12 SCT, writes in The Webb Society Nebulae and Clusters Section Report No. 10, July 1992: " [NGC 6559, IC 1274, IC 1275, IC 4684, IC 4685] This complex of faint nebulosity lies about one degree east of M8, and deep photographs reveal that it seems connected to its more prominent neighbour. Low magnifications and a UHC filter were necessary to see indistinct faint patches of nebulosity, most of which seem associated with groups of stars."

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