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Visually observing comets

Author: David A J Seargent
Publisher: Cham, Switzerland : Springer, 2017.
Series: Astronomer's pocket field guide.
Edition/Format:   eBook : Document : EnglishView all editions and formats
Summary:
In these days of computers and CCD cameras, visual comet observers can still contribute scientifically useful data with the help of this handy reference for use in the field. Comets are one of the principal areas for productive pro-amateur collaboration in astronomy, but finding comets requires a different approach than the observing of more predictable targets. Principally directed toward amateur astronomers who  Read more...
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Genre/Form: Electronic books
Handbooks and manuals
Observers' manuals
Additional Physical Format: Print version:
Seargent, David A.J. (David Allan John), 1947-
Visually observing comets.
Cham, Switzerland : Springer, 2017
(OCoLC)954007963
Material Type: Document, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: David A J Seargent
ISBN: 9783319454351 3319454358
OCLC Number: 976406736
Notes: Includes indexes.
Description: 1 online resource.
Contents: Dedication; Preface; Acknowledgements; Contents; About the Author; Part I: Introducing Comets; Chapter 1: Comets Throughout History; Chapter 2: Comets in€Motion; Chapter 3: Toward the€Modern Understanding of€Comets; Chapter 4: The Formation of€Tails; Chapter 5: The Origin of€Comets; Theories Based on€Interstellar Origin; Theories Based on€Solar System Origin; Chapter 6: A Reservoir of€Comets!; Part II: The Role of Visual Comet Observers in the Age of CCDs; Chapter 7: The Value of€Visual Observing in€a€Photo-Happy World; Chapter 8: Visual Comet Hunting; Chapter 9: Observing Known Comets. What Instruments Are Most Suitable for€Visual Comet Observing? Knowing Which Comets Are Visible and€How to€Find Them; Chapter 10: The Coma: How to€Estimate Its Brightness and€Record Its Features; Estimating the€Brightness of€a€Comet; The Sidgewick, or In-Out Method; The Morris, or Modified Out Method; The Bobrovnikov, or Out-Out Method; The Beyer, or Extra-Focal Extinction Method; The In-Focus Method; Sometimes Innovation Is Required!; Steady Evolution and€Sudden Outbursts in€Brightness; Diameter of€the€Coma; Degree of€Condensation of€Coma; Other Coma Features That May Be€Visible. Chapter 11: Observing the€Tails of€Comets: What to€Look For€and€Record Length of€Tail; Position Angle (PA) of€the€Tail; Features to€Look For€in€the€Tail; Tail Rays; Disconnection Events (DEs) and€Other Irregularities; Features Sometimes Displayed by Dust Tails; But If Striae Are Not Synchrone Streamers, What Are They?; Tail Spines and€"Shadow of€the€Nucleus"; Those Mysterious "Coruscations"!; Looking For€an€Anti-Tail; Chapter 12: Recording and€Reporting Your Observations; Part III: The Nuts and Bolts of Comet Observing. Chapter 13: Relatively Bright Comets Predicted to€Return from€2016 to€2027 45P/Honda-Mrkos-Pajdusakova; 2P/Encke; 41P/Tuttle-Giacobini-Kresak; 21P/Giacobini-Zinner; 38P/Stephan-Oterma; 46P/Wirtanen; 2P/Encke; 88P/Howell; 15P/Finlay; 6P/d'Arrest; 19P/Borrelly; 103P/Hartley; 2P/Encke; 144P/Kushida; 12P/Pons-Brooks; 13P/Olbers; 24P/Schaumasse; 10P/Tempel; 2P/Encke; 45P/Honda-Mrkos-Pajdusakova; Chapter 14: 29P/Schwassmann-ƯWachmann, an€"Outbursting" Comet to€Watch; Chapter 15: Some Prominent Visual Comet Discoverers; The Pioneer Comet Hunters; Charles Messier (1730-1817). Pierre Mechain (1744-1804) Caroline Herschel (1750-1848); Jean-Louis Pons (1761-1831); Comet Hunters of€the€Later Nineteenth and€Early Twentieth Centuries; Comet Hunters of€the€Late Twentieth and€Twenty-First Centuries; Chapter 16: The Kreutz Sungrazing Comet Group: A€Special Opportunity for€Visual Comet Hunters?; Chapter 17: Numbered Observable Short- Period Comets; Chapter 18: Unnumbered Short-Period Comets; Appendix A: Atmospheric Extinction Tables; Appendix B: The€Phase Angle of€a€Comet; Appendix C: "Lost" Short-Period Comets; Appendix D: Lunar Phases 2017-2027; Glossary of Terms.
Series Title: Astronomer's pocket field guide.
Responsibility: David A.J. Seargent.

Abstract:

In these days of computers and CCD cameras, visual comet observers can still contribute scientifically useful data with the help of this handy reference for use in the field. Comets are one of the principal areas for productive pro-amateur collaboration in astronomy, but finding comets requires a different approach than the observing of more predictable targets. Principally directed toward amateur astronomers who prefer visual observing or who are interested in discovering a new comet or visually monitoring the behavior of known comets, it includes all the advice needed to thrive as a comet observer. After presenting a brief overview of the nature of comets and how we came to the modern understanding of comets, this book details the various types of observations that can usefully be carried out at the eyepiece of a telescope. Subjects range from how to search for new comets to visually estimating the brightness of comets and the length and orientation of tails, in addition to what to look for in comet heads and tails. Details are also given of 20 periodic comets, predicted to return between the years 2017 and 2027, that are expected to become suitable targets for visual observing, in addition to information on a famous comet potentially visible each year and subject to great outbursts of brightness.

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"Seargent, a former part-time lecturer in philosophy at the University of Newcastle, Australia, makes the convincing case that any individual can make valuable observations with little more than a Read more...

 
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