Observing and Measuring Visual Double Stars

Contents Introduction 1 More Than One Sun Bob Argyle 2 Why Observe Double Stars? Bob Argyle 3 The Observation of Binocular Double Stars Mike Ropelewski 4 The Scale of Binary Systems Bob Argyle 5 Multiple Stars and Planets Bob Argyle 6 Is the Sun a Double Star? Bob Argyle 7 The Orbital Elements of a Visual Binary Star Andreas Alzner 8 Orbit Computation Andreas Alzner 9 Some Famous Double Stars Bob Argyle 10 The Resolution of a Telescope Bob Argyle 11 Reflecting Telescopes and Double-Star Astronomy Christopher Taylor 12 Simple Techniques of Measurement Tom Teague 13 The Double-Image Micrometer Andreas Alzner 14 The Diffraction Grating Micrometer Andreas Maurer 15 The Filar Micrometer Bob Argyle 16 The CCD Camera Doug West 17 Speckle Interferometry for the Amateur Nils Turner 18 Lunar Occultations Graham Appleby 19 What the Amateur can Contribute Bob Argyle 20 Some Active Amateur Double Star Observers Bob Argyle 21 An Observing Session Bob Argyle 22 Some Useful Formulae Michael Greaney 23 Star Atlases and Software Owen Brazell 24 Catalogues Bob Argyle 25 Publication of Results Bob Argyle Appendix: Some Useful URL Addresses Brief Biographies Index