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Occultations

Part of the Springer Praxis Books book series (PRAXIS)

Abstract

Astronomers attempt to make precise measurements of the size and shape of astronomical objects for a variety of reasons. Let’s suppose that we want to know the size and shape of a particular object. One way would be to try to carefully photograph the target at high magnification. We’d quickly discover that this technique doesn’t work for many types of objects. In a well-done astronomical image, all of the stars will have blur circles that are essentially the same size. This size is set by optical diffraction or (more commonly) atmospheric “seeing”. Typically, “seeing” restricts you to no better than 1–2 arc-sec resolution. The image of a star does not tell us anything about the star’s actual size.

Keywords

Lunar Occultation Faint Star Occultation Event Amateur Astronomer Target Star 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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2.6 References

  1. [1]
    Dunham, D.W., Dunham, J.B., and Warren, W.H. Jr., IOTA Observer’s Manual (draft version), IOTA, Greenbelt MD (19 March 1994).Google Scholar
  2. [2]
    Dunham, D.W., Nason, G., Timerson, B., and Maley, P. “Amateur-Professional Partnerships in the Observation of Occultations”, in: Percy, J.R. and Wilson, J.B. (eds.), Amateur-Professional Partnerships in Astronomy, ASP Conference Series, Vol. 220 (2000).Google Scholar
  3. [3]
    Dunham, D.W., Dunham, J.B., and Warren, W.H. Jr., IOTA Observer’s Manual (draft version), IOTA, Greenbelt MD (19 March 1994).Google Scholar
  4. [4]
    Taylor, G.E., Journal of the British Astronomical Association, vol. 72, p. 212 (1962).Google Scholar
  5. [5]
    IAU-Circular 3437: “Occulation of SAO 80950 by (9) Metis.”Google Scholar
  6. [6]
    Herchak, S. “Millisecond Video Timing for the Masses”, The Occultation Newsletter, vol. 12, no. 2, p. 4 (April, 2005).Google Scholar

Copyright information

© Praxis Publishing Ltd, Chichester, UK 2007

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