Sh2-237 苍蝇星云 1 7'x7' 49 B D Fly NGC 1931 Fly Sh2-240 面条星云 1 3.6d x 3.4d 44064 D B Spagetti Nebula SAO 077322 Spagetti Nebula Sh2-241 1 12'x12' 144 D B SAO 077958 Sh2-244 蟹状星云 1 7'x6' 42 D Crab M 1 Crab Sh2-245 波江座环 1 14d x 29d 1461600 B SAO ...
This paper presents the results of monochromatic [O iii ], [N ii ], and [S ii ] observations of ring nebula Sh157 around the star (WR + B0III) HD 219460 belonging to the Ba 3 cluster. A stratification of radiation typical for photoionization excitation has been revealed. The ...