Nebulae Previously Known in Field VII
Yerkes ObservatoryMay, 1917
Plate IIIWolf’s Classes of Nebulae(Copied from the Königstuhl [Heidelberg] Publications)
Plate III
Wolf’s Classes of Nebulae
(Copied from the Königstuhl [Heidelberg] Publications)
Plate IVEnlarged Negative of Field IIICenter at Center at α=11ᴴ 4ᵐ, δ=+29°30′For identification of lettered starssee footnote 7 page 5.
Plate IV
Enlarged Negative of Field III
Center at Center at α=11ᴴ 4ᵐ, δ=+29°30′
For identification of lettered starssee footnote 7 page 5.
Footnotes:[1]A dissertation submitted to the Faculty of the Ogden Graduate School of Science of the University of Chicago in candidacy for the degree of Doctor of Philosophy.[2]Nucleus is eccentric and undefined on the photograph, hence the photographic position is probably in error by several seconds of arc.[3]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.[4]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.[5]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.[6]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.[7]See Plate IV, enlarged from negative R 3352, taken with 120ᵐ exposure on February 26, 1916. The numbers were marked on only those nebulae which promised to be readily visible on the engraving, and which were separated enough to give room for inscribing the number. The B.D. stars are designated by letters, for which the key is as follows.FIELD IIISTAR B.D.A = +30°2107B = +30°2108C = +30°2109D = +30°2110E = +30°2115F = +30°2121G = +30°2123H = +29°2123J = +29°2125K = +29°2126L = +29°2128M = +29°2129N = +29°2130P = +29°2133R = +29°1970S = +28°1971[8]Popular Astronomy,24, 111, 1916.[9]Journal of the R.A.S., Canada,10, 134, 1916.[10]Field IV covers the position of a group of 18 small nebulae announced by E. E. Barnard inAstronomische Nachrichten, 125, 369, 1890. The positions there given were rough estimations from the stars B.D. +56°.1679 and B.D. +56°.1682. On the photographs, the nebulae in this region are so small and so crowded that I have been able to identify only three individuals of the group. Barnard’s Nos. 4, 7, and 18 are very probably my Nos. 41, 43, and 62.
Footnotes:
[1]A dissertation submitted to the Faculty of the Ogden Graduate School of Science of the University of Chicago in candidacy for the degree of Doctor of Philosophy.
[1]A dissertation submitted to the Faculty of the Ogden Graduate School of Science of the University of Chicago in candidacy for the degree of Doctor of Philosophy.
[2]Nucleus is eccentric and undefined on the photograph, hence the photographic position is probably in error by several seconds of arc.
[2]Nucleus is eccentric and undefined on the photograph, hence the photographic position is probably in error by several seconds of arc.
[3]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[3]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[4]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[4]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[5]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[5]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[6]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[6]Mean of the positions given in Vols. III and IV. N.G.C. 7621 is 5ˢ.4 preceding, and 1′ 49″ south of 7623. There is a double star in the position published in theStrassburg Annals.
[7]See Plate IV, enlarged from negative R 3352, taken with 120ᵐ exposure on February 26, 1916. The numbers were marked on only those nebulae which promised to be readily visible on the engraving, and which were separated enough to give room for inscribing the number. The B.D. stars are designated by letters, for which the key is as follows.FIELD IIISTAR B.D.A = +30°2107B = +30°2108C = +30°2109D = +30°2110E = +30°2115F = +30°2121G = +30°2123H = +29°2123J = +29°2125K = +29°2126L = +29°2128M = +29°2129N = +29°2130P = +29°2133R = +29°1970S = +28°1971
[7]See Plate IV, enlarged from negative R 3352, taken with 120ᵐ exposure on February 26, 1916. The numbers were marked on only those nebulae which promised to be readily visible on the engraving, and which were separated enough to give room for inscribing the number. The B.D. stars are designated by letters, for which the key is as follows.
[8]Popular Astronomy,24, 111, 1916.
[8]Popular Astronomy,24, 111, 1916.
[9]Journal of the R.A.S., Canada,10, 134, 1916.
[9]Journal of the R.A.S., Canada,10, 134, 1916.
[10]Field IV covers the position of a group of 18 small nebulae announced by E. E. Barnard inAstronomische Nachrichten, 125, 369, 1890. The positions there given were rough estimations from the stars B.D. +56°.1679 and B.D. +56°.1682. On the photographs, the nebulae in this region are so small and so crowded that I have been able to identify only three individuals of the group. Barnard’s Nos. 4, 7, and 18 are very probably my Nos. 41, 43, and 62.
[10]Field IV covers the position of a group of 18 small nebulae announced by E. E. Barnard inAstronomische Nachrichten, 125, 369, 1890. The positions there given were rough estimations from the stars B.D. +56°.1679 and B.D. +56°.1682. On the photographs, the nebulae in this region are so small and so crowded that I have been able to identify only three individuals of the group. Barnard’s Nos. 4, 7, and 18 are very probably my Nos. 41, 43, and 62.