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RA: 18h 16m 55.3s
Dec: −19° 46′ 38″
Ch: MSA:1368, U2:339, SA:22
Ref: SIMBAD, Corwin, NGC/IC, [2003A&A...399..141M]
Type: reflection nebula
Mag: B=10.5, V=?
Size: 4′ x 3′
NGC 6589 may also be IC 4690 (which see for more discussion). Swift's position for N6589 is about 36 seconds of time off, a mistake corrected by Barnard, and included in the IC2 Notes. Ironically, Barnard is also responsible for a mistake of his own which makes the identity with I4690 probable.
Barnard, E. E. (1892) "Photographic nebulosities and groups of nebulous stars", A.N. 3111.
[see remarks for NGC 6595]
Ced 157a (NGC 6589)
Position (1900): RA 18 10.4, Dec - 19 49
Star: -19 4940 (Mp=9.55, V=9.50, SpT=B5)
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: "157 a = NGC 6589. Disc. Swift 1885 (733). FA 86. (49, 51, 88 Pl 55, 93 Pl 29 Pl 31, 114, 216, 366, 715). R. -19 4940 = HD 167638."
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'.
= NGC 6589, Ced 157a
Pos (1950.0) 18:13.3, −19:48
Size: 4x3 (blue), 3x3 (red).
The RNGC (Sulentic and Tifft 1973) notes that this is a diffuse nebula.
= DG 149, [RK68] 88, VdB 118, N6589, GN 18.14.0, Ced 157a
Class: C+E (emission and reflection neb)
Photo Index by Jim Lucyk: 6590, Astronomy mag. 10/84 (cover), Deep Sky #11 Su85 p20.
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