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Look Inside On the Determination of the Orbits of Comets

On the Determination of the Orbits of Comets
According to the Methods of Father Boscovich and Mr de la Place

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Part of Cambridge Library Collection - Astronomy

  • Date Published: June 2013
  • availability: Available
  • format: Paperback
  • isbn: 9781108061735

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About the Authors
  • When this book first appeared in 1793, there had been no significant work on comets published in English since Edmond Halley's death some fifty years before. In Europe the field was dominated by French astronomers such as Pingré and Laplace, but their ornate styles were often difficult to translate. In this concise monograph, Sir Henry Englefield (c.1752–1822) draws both on this continental work and on his own correspondence with William Herschel to produce one of the few accessible manuals in English for the computation of cometary orbits. He includes mathematical examples as new formulae are introduced, along with detailed tables and appendices. Englefield's particular interest was in the development of scientific instruments suitable for travellers - he devised a portable telescope and lent his name to the Englefield mountain barometer - and his passion for efficiency shines through in this work, still valuable to researchers in the history of astronomy and comet science.

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    Product details

    • Date Published: June 2013
    • format: Paperback
    • isbn: 9781108061735
    • length: 290 pages
    • dimensions: 244 x 170 x 15 mm
    • weight: 0.47kg
    • contains: 4 b/w illus.
    • availability: Available
  • Table of Contents

    Preface
    1. General view of the method
    2. On the motion of the point of intersection of the radius vector and cord
    3. On the comparison of the parabolic cord with the space which answers to the mean velocity of the earth in the same time
    4. Of the reduction of the second longitude of the comet
    5. On the proportion of the three curtate distances of the comet from the earth
    6. Of the graphical declination of the orbit of the earth
    7. Of the numerical quantities to be prepared for the construction or computation of the comet's orbit
    8. Determination of the distances of the comet from the earth and the sun
    9. Determination of the elements of the orbit from the determined distances
    10. Determination of the place of the comet from the earth and sun
    11. Determination of the distances of the comet from the earth and sun
    12. Determination of the comet's orbit
    13. Determination of the place of the comet
    14. Application of the graphical method to the comet of 1769
    15. Application of the distances found
    16. Determination of the place of the comet, for another given time
    17. Application of the trigonometrical method to the comet of 1769
    18. Determination of the elements of the orbit of the comet of 1769
    Example of the graphical operation for the orbit of the comet of 1769
    Example of the trigonometrical operation for the orbit of the comet of 1769
    Conclusion
    La Place's general method for determining the orbits of comets
    Determination of the two elements of the orbit
    Application of La Place's method of finding the approximate perihelion distance
    Application of La Place's method for correcting the orbit of a comet, to the comet of 1769
    Explanation and use of the tables
    Tables
    Appendix
    Plates.

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    On the Determination of the Orbits of Comets

    Henry Englefield

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  • Author

    Henry Englefield

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