LMC-N74 W

05 45 11 -67 09 32; Dor
Size 8.5’x4.5′

30″ (10/13/15 – OzSky): at 152x + NPB filter; excellent HII region! Bright, very large, elongated E-W, very irregular shape, ~7’x4′, the main section tapers on the eastern end and spreads out on the western end. Numerous mag 14 stars are involved (association LH 116) as well as mag 10.2 HD 270111 on the south side. N74 (East) lies ~9′ ESE, with the two regions spanning nearly 15′ E-W.

On the red DSS, at least one of the mag 14 “stars” at the east end is a very compact HII knot (N74A).

LMC-N74 E = DEM L 315

05 46 43 -67 10 53; Dor
Size 6.9’x3.4′

30″ (10/13/15 – OzSky): at 152x + NPB filter; bright, very large nebulous region. The main piece is oval 3:2 E-W, ~2’x1.4′ and brighter along the rim. A filament is attached on the south side extending to the SE! Unfiltered a number of stars are involved with the nebulosity. A mag 11.2 star is roughly 3′ S. N74 W is ~9′ W. Although the two sections of N74 are possibly part of the same complex, they didn’t appear connected. Located 21′ SE of NGC 2105 and 25′ SW of mag 5.1 Epsilon Doradus.

The portion of N74 E containing the oval rim (a semi-ellipse on images open to the N and NW) is considered a (partial) Wolf-Rayet Ring Nebula associated with the mag 14.5 W-R star Brey 100 = BAT99-134 = HD 270149. This W-R star is offset from the center of the ring to the east side. The dimensions of the ring are ~87″ x107″.