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NGC 6590 (15,064 of 18,816)

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NGC 6590

NGC 6590, NGC 6595, IC 4700, Ced 157b, DG 150, LBN 46B, VDB 119, Sh 2-37, Magakian 758

RA: 18h 17m 4.9s
Dec: −19° 51′ 58″

Con: Sagittarius
Ch: MSA:1368, U2:339, SA:22

Ref: SIMBAD, Collinder (1931), DAML02, NGC/IC, [2003A&A...399..141M]

(reference key)

Type: reflection nebula

Mag: B=9.8, V=?

Size: 4′ x 3′
PA: ?

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

NGC 6590 = NGC 6595 = IC 4700. JH found the brightest nebula in this group while observing at Slough; his position is good. Swift came across it and another nearby nebula nearly 60 years later in 1885, but misplaced both by about 45 seconds of time in RA from the correct positions. In a note in AN 3101, Barnard corrected the positions for both of Swift's objects, noting the identity of N6590 with N6595. He also announced the discovery of another larger, though fainter nebula (I1284) northeast of the brighter pair. (In still another note in AN 3111, Barnard also announced the discovery of yet another nebula here, IC 1283. See that for more).

Curiously, Barnard mentions the AN 3111 note in AN 4239, but not the AN 3101 note. Had he done so, it might have alerted Dreyer to the identity of one of Barnard's nebulae mentioned there (see NGC 6589 for the passage) with N6595. Had this happened, Dreyer probably would not have been included it in the second IC.

Published comments

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

Ced 157b (NGC 6590)

Position (1900): RA 18 11.1, Dec - 19 55

Star: -19 4946 (Mp=10.5, V=10.15, SpT=B6, B8)

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 with conspicuous structure (eg. IC 5146)

Size: 3.5'x2'

Notes: "157 b = NGC 6590 = NGC 6595 = IC 4700 = GC 4395 = h 2002. (49, 51, 85, 93 Pl 29 Pl 31, 114, 194, 216, 366, 428, 578, 715, 733). R. Regarding the identification, see Barnard (49)."

Dorschner & Gürtler (1963)

Untersuchungen uber Reflexionsnebel.

DG 150

= NGC 6590, Ced 157b

Pos (1950.0) 18:14.0, −19:54

Size: 4x3 (blue), 3x3 (red).

Lynds, B.T. (1965)

Beverly Lynds (Astrophysical Journal Supplement, No 105, 1965) in her Catalogue of Bright Nebulae notes that this nebula is bright, more prominent on the blue POSS plate and has a maximum size of 4' x 3'.

Helwan Obs. Bulletin No 9 (1912)

Identical with NGC 6595 as pointed out by Barnard (A.N. 3101)

Sulentic & Tifft (1973)

The RNGC (Sulentic and Tifft 1973) notes that this is a diffuse nebula.

Magakian T. Yu. (2003)

= DG 150, [RK68] 89, VdB 119, N6590, GN 18.14.1, Ced 157b, Other designations: Sh37

Class: C+E (emission and reflection neb)

Comments: 2 stars

Contemporary observations

Tom Bryant

2011 6 29 23:26:51

Observing site: Little Bennett Regional Park

Telescope: C-11

[18h 17m 0s, -19° 53' 0"] A triple star surrounded by a faint haze.

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