GREAT NEBULA IN ORION OBSERVED BY THE D. O. MILLS EXPEDITION Aug. 26.86 3.3 1-pr. 18-in. +13.7 Miss Hobe N, N2 Hẞ Hy +13.4 1 Pr. Trapezium +13.0 +13.3 1 Pr. Trapezium N, N, HB Hy Hồ + 9.1 Pr. Trapezium Ν, Ν, Ηβ Ηγ +16.7 Extended nebula with 11.5 mag. star near center. Nebulosity brightest as indicated in drawing, figure 23. May possibly be very large ring nebula. Nearly as large as N.G.C. 2070, but much fainter, about 11 mag. Diameter 4'. The N, line alone, and that very faintly, was recorded on each of the three spectrograms and the three observed velocities are discordant. It is in the Greater Magellanic Cloud. N.G.C. 2022. a=5h 36m6; 8=+9° 2′; λ = 84° 2′; B=-14° 18′ The N, line is relatively very strong in this nebula, a little fainter on the spectrograms than N1 and considerably brighter than N2. N1 : N2 : Hß : N2 :: 10:3:14:7. Hẞ is just measurable on all of the plates. 1 2 3 N.G.C. 2070. = 5h 39m4; 8 =—69° 9′; λ = 304° 22′; ß -86° 45′ 30 Doradus; extended, over 5' in diameter, covering considerably more than the field of the diagonal finder; composed of stars and nebulosity; mag. 6th. The brighter part of the nebula is loop-shaped, while two other portions surrounding 8th-9th mag. stars are comparable in brightness with the loop. It is located in the Greater Magellanic Cloud. N.G.C. 2077. a=5h 40m5; 8 -69° 42'; λ=297° 34′; B -86° 22' Faint nebulous patch with faint nucleus; 11th mag.; diameter about 15", limits indefinite. Is in the same field with N.G.C. 2080. It is in the Greater Magellanic Cloud. N.G.C. 2079. a=5h 406; 8=—69° 49′; λ=296° 38′; ß=—86° 16′ Round, planetary, diameter 12". Field quite flat, although there is a trace of a nucleus on the following edge. One of the nebulae of the Greater Magellanic Cloud. A lune-shaped nebula containing stars and nebulosity; mag. 9.5; three distinct stellar nuclei; length 20", greatest width 8". Located in the Greater Magellanic Cloud. Ɑ= = 5h 41m0; 8=-69° 43′; λ: Small round planetary, about 7′′ in diameter and uniformly brighter towards center; has 10.5 mag. star 12" south following. It is situated in the Greater Magellanic Cloud. 296° 59'′; B =—86° 22′ 296° 31'; ẞ=-86° 24′ N.G.C. 2086. a 5h 41m4; 8: -69° 43′; λ Planetary, 10" in diameter, with nucleus on following edge; mag. 10.5. It is in the Greater Magellanic Cloud. Hydrogen radiations are strong in this object; Hẞ and N2 have essentially equal intensities on the spectrograms. Hy is strong on the first plate, but its comparison line is poor. The last exposure was made in search of rotation effects, with the slit upon the major axis of figure, but the spectrum lines seem not to be inclined. N.G.C., 2165. a=6h 17m1; 8=-12° 56′; λ=95° 10′; B=-36° 18′ N, is relatively strong in the spectrum of this object. The recorded lines N,, N., HB, N, have intensities about as 10:31:0.7. Measurer Haynes Vel. V Wt. Slit +60* short Imperfect focus short +51 1 90° +51 +484 90° N, N2 Hẞ N, +46 +46 N1 N2 Hß N ̧ +56 +56 1 Fine plate 90° All lines fully exposed Hẞ v. ft. N, N2 Hẞ +54.4 80° +55.1 260° |