Publications of the Astronomical Society of the Pacific Volume 4

Publications of the Astronomical Society of the Pacific Volume 4

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...diagram of its path is given: the body passed between Castor and Pollux going downwards in a direction towards Venus, . RESIDUALS OF RECENT OBSERVATIONS OF tf HERCULIS. By Arm1n O. Leuschner. Elements of fi? Herculis were published by Prof. Celor1a of the Brera Observatory at Milan in vol. cxxiii, no. 2949 of the Astr. Nachr., giving a period of 40.65 years. Shortly after my own elements appeared in the Publ. A. S. P., vol. ii, p. 46, the period being 45.39 years. The date of the last observations upon which these orbits are based is.1888.63 (sch1aparell1) for the former and 1889.51 (burnham) for the latter. Since then Prof. Hall, of the U. S. Naval Observatory, has published a series of measures in vol. x, no. 16, of the Astronomical Journal, covering the period from 1880 to 1891, and Prof. Burnham, of the Lick Observatory, has observed the companion regularly every year. It will be of considerable interest to know how the elements represent these observations. The residuals of some of Prof. Hall's measures have already been printed with the elements, but of a few of them values were used in the determination of the elements which are slightly different from those last printed in the Astronomical Journal. P'or this reason as well as to keep these residuals together they have been recomputed and are included in the table below. The very last observations seem to indicate that the periods arrived at are too short, although the period of 45 years cannot be much out. The discrepancies are not large enough to warrant an attempt at improvement of the elements at present, and as the motion is becoming less rapid now, probably several years will have to elapse before much can be gained by correcting the elements. The residuals here given were obtained by...show more

Product details

  • Paperback | 96 pages
  • 189 x 246 x 5mm | 186g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236494717
  • 9781236494719