Monograph of the Central Parts of the Nebula of Orion Ra 5h 28m 24so Npd
Monograph of the Central Parts of the Nebula of Orion Ra 5h 28m 24so Npd
Holden Edward Singleton
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1876, DECEMBER 13. Begin i2 h 40, end 13* o m . Mag. Power, 175+- Order of brightness. i. A. 2. D. 3. G, H. F. 4. N, I, E. Mr. H. S. PRITCHETT puts D and A about equal, but thinks D a little the brighter. The space between 685 and 708 is blacker than that between 708 and 741. Clouds. 1876, DECEMBER 19. Begin 13* 15" end i 3 h 35. Wt. = 3. Order of brightness. (Mr. PRITCHETT. ) i. DnR. 2. A. 3. I. 4. H and F. 5. B. SCHROETER'S second bridge. It extends to the south as far as the parallel of 647.... T: T'. The south half very black; T' blacker than north half of T. Order of brightness. i. A. 2. D. 3. F. 4. Q. 5. N. 6. G. 7. H. 8. I. 9. E. B = F = W ; Y = (doubtful). Order of blackness. I. T'. 2. T". 3. South half of r. 4 W. 5. Sinus Gcntilli Sinus Gentilii brighter than W l . 685-708 in the prolongation of the dark channel between (F and G) and H. 7- As in Index-Chart. Pons Schroeteri. . Its direction passes through 685 nearly. Position-circle: 325-7, 323-5, 323-O; mean, 324. I. PiJi Q . 2.
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