Practical Astronomy with Your Calculator

Front Cover
Cambridge University Press, 1988 - Nature - 185 pages
3 Reviews
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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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

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