Memoirs of the Royal Astronomical Society Volume 36

Memoirs of the Royal Astronomical Society Volume 36

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1867 edition. Excerpt: ...n. A mean of the three measures of the close pair gives: --o P = 336-4 D = o-44 1878-7. The only measures of the wide pair (S. 437) are: --The fourth star, D, is faint, and not heretofore observed. No. 537. Pleiades.) One of the outer stars of the Pleiades, and a very difficult pair from the great difference in the magnitudes. It has been observed twice by De., and the two sets of measures are as follows: --o t De. P= 194-4 D = o'4 1877-8 1859 o-6o 1877-9. The difficulty of the object will account for the difference in the measures of the angles. De. calls the magnitudes 8-0 and 10'0. My distances are probably too large. No. 538. (Pleiades.) Another pair in the Pleiades, but very small stars. Place from the Washington Catalogue, where it is 2os'$f. Alcyone, and 20"P5 s. No. 542. This star is not in any Star Catalogue I have. Place with the micrometer from W1 iii. 1001. No. 545. L. 7556. A difficult pair in the field with OS 531, 8s-1 p. and 3' 54" s. The mean of the four measures is: --P = 310-0 D=i-02 1878-2. The components are very unequal. No. 547. 47 Tauri. An elegant pair, and in distance and magnitudes not unlike 38 Persei. It has been measured on three nights by De., and the observations are too important not to be given in detail. o P = 357-1 D = o-89 1877-74 361-8 0-85 1877-83 360-3 0-73 1878-13. Most observers, and certainly those less experienced, will find it too difficult for an aperture of only 7 inches. The mean of the two sets of measures is as follows: --No. 550. Aldebaran. (A and C = Y VI. 66 = S. 452 = S 2 App. II.) The new companion, much nearer than the well-known attendant of 9 and S, is very minute, and not unlike in appearance and difficulty Hall's outer satellite of Mars. The colour and...show more

Product details

  • Paperback | 46 pages
  • 189 x 246 x 3mm | 100g
  • Rarebooksclub.com
  • United States
  • English
  • black & white illustrations
  • 123691712X
  • 9781236917126