# Practical Astronomy with Your Calculator

Cambridge University Press, 1988 - Nature - 185 pages
Practical Astronomy with your Calculator, first published in 1979, has enjoyed immense success. The author's clear and easy to follow routines enable you to solve a variety of practical and recreational problems in astronomy using a scientific calculator. Mathematical complexity is kept firmly in the background, leaving just the elements necessary for swiftly making calculations. The major topics are: time, coordinate systems, the Sun, the planetary system, binary stars, the Moon, and eclipses. In the third edition there are entirely new sections on generalised coordinate transformations, nutrition, aberration, and selenographic coordinates. The calculations for sunrise and moonrise are improved. A larger page size has increased the clarity of the presentation. This handbook is essential for anyone who needs to make astronomical calculations. It will be enjoyed by amateur astronomers and appreciated by students studying introductory astronomy. • Clear presentation • Reliable approximations • Covers orbits, transformations, and general celestial phenomena • Can be used anywhere, worldwide • Routines extensively tested by thousands of readers round the world

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User Review  - Czrbr - LibraryThing

Book Description: CAMBRIDGE UNIVERSITY PRESS. Very Good. Contains library information from University of Nebraska at Omaha. Read full review

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Back in the days before computers, some work was done with calculators. Read full review

### Contents

 Time 1 The date of Easter 2 Converting the date to the day number 4 Julian day numbers 6 Converting the Julian day number to the calendar date 8 Finding the day of the week 9 Converting hours minutes and seconds to decimal hours 10 Converting decimal hours to hours minutes and seconds 11
 Sdenographic coordinates 78 Atmospheric extinction 82 The Sun 83 Orbits 84 The apparent orbit of the Sun 85 Calculating the position of the Sun 86 Calculating orbits more precisely 89 Calculating the Suns distance and angular size 92

 Converting the local time to UT 12 Converting UT to local civil time 15 Sidereal time ST 16 Conversion of UT to GST 17 Conversion of GST to UT 18 Local sidereal time LST 20 Converting LST to GST 21 Ephemeris time ET and terrestrial dynamic time TDT 22 Coordinate systems 25 Horizon coordinates 26 Equatorial coordinates 27 Ecliptic coordinates 30 Galactic coordinates 32 Converting between decimal degrees and degrees minutes and seconds 33 Converting between one coordinate system and another 34 Converting between right ascension and hourangle 35 Equatorial to horizon coordinate conversion 36 Horizon to equatorial coordinate conversion 38 Ecliptic to equatorial coordinate conversion 40 Equatorial to ecliptic coordinate conversion 42 Equatorial to galactic coordinate conversion 43 Galactic to equatorial coordinate conversion 44 Generalised coordinate transformations 45 The angle between two celestial objects 51 Rising and setting 52 Precession 56 Nutation 60 Aberration 62 Refraction 64 Geocentric parallax and the figure of the Earth 66 Calculating corrections for parallax 69 Heliographic coordinates 72 Carrington rotation numbers 77
 Sunrise and sunset 93 Twilight 96 The equation of time 98 Solar elongations 100 The planets comets and binary stars 101 The planetary orbits 102 Calculating the coordinates of a planet 103 Finding the approximate positions of the planets 111 Perturbations in a planets orbit 113 The distance lighttravel time and angular size of a planet 116 The phases of the planets 118 The positionangle of the bright limb 119 The apparent brightness of a planet 121 Comets 123 Parabolic orbits 130 Binarystar orbits 133 The Moon and eclipses 138 The Moons orbit 139 Calculating the Moons position 142 The Moons hourly motions 146 The phases of the Moon 147 The positionangle of the Moons bright limb 149 The Moons distance angular size and horizontal parallax 150 Moonrise and moonset 151 Eclipses 154 The rules of eclipses 156 Calculating a lunar eclipse 157 Calculating a solar eclipse 161 The Astronomical Calendar 164 Glossary of terms 167 Symbols and abbreviations 175 Index 179 Copyright