"This is a work which all amateur astronomers will want to possess." Times Higher Education Supplement

• Preface; Using your personal computer for astronomy; Default value input routine; 'Y' or 'N' input routine MINSEC converts between decimal hours/degrees and min/sec form; JULDAY calendar date to Julian day number since 1900 Jan. 0.5; CALDAY Julian day number since 1900 Jan. 0.5 to calendar date; TIME converts between local civil and sidereal times; EQHOR converts between equatorial and horizon coordinates; HRANG converts between right ascension and hour-angle; OBLIQ calculates the value of the obliquity of the ecliptic; NUTAT finds corrections for nutation in longitude and obliquity; EQECL converts between equatorial and ecliptic coordinates; EQGAL converts between equatorial and galactic coordinates; GENCON converts between any of the coordinate systems; PRCESS1 approximate precession of equatorial coordinates; PRCESS2 rigorous precession of equatorial coordinates; PARALLX converts between geocentric and apparent position; REFRACT calculates the effect of atmospheric refraction; RISET finds the circumstances of rising and setting; ANOMALY solves Kepler's equation for elliptical motion; SUN finds the ecliptic coordinates of the Sun; SUNRS finds the circumstances of sunrise and sunset; PELMENT returns the orbital elements of the major planets; PLANS finds the position of a planet; MOON finds the position and parallax of the Moon; MOONRS finds the circumstances of moonrise and moonset; MOONNF finds the times of new and full moon; ECLIPSE finds the circumstances of lunar and solar eclipses; Displays an eclipse in graphical form; ELOSC finds positions from osculating elliptical elements; RELEM converts ecliptic orbital elements from one epoch to another; PCOMET finds the position of a comet from parabolic elements; PFIT finds parabolic elements from observations; EFIT finds elliptical elements from observations; List of variables; Bibliography; Index.

"This is a work which all amateur astronomers will want to possess." Times Higher Education Supplement

• Preface; Using your personal computer for astronomy; Default value input routine; 'Y' or 'N' input routine MINSEC converts between decimal hours/degrees and min/sec form; JULDAY calendar date to Julian day number since 1900 Jan. 0.5; CALDAY Julian day number since 1900 Jan. 0.5 to calendar date; TIME converts between local civil and sidereal times; EQHOR converts between equatorial and horizon coordinates; HRANG converts between right ascension and hour-angle; OBLIQ calculates the value of the obliquity of the ecliptic; NUTAT finds corrections for nutation in longitude and obliquity; EQECL converts between equatorial and ecliptic coordinates; EQGAL converts between equatorial and galactic coordinates; GENCON converts between any of the coordinate systems; PRCESS1 approximate precession of equatorial coordinates; PRCESS2 rigorous precession of equatorial coordinates; PARALLX converts between geocentric and apparent position; REFRACT calculates the effect of atmospheric refraction; RISET finds the circumstances of rising and setting; ANOMALY solves Kepler's equation for elliptical motion; SUN finds the ecliptic coordinates of the Sun; SUNRS finds the circumstances of sunrise and sunset; PELMENT returns the orbital elements of the major planets; PLANS finds the position of a planet; MOON finds the position and parallax of the Moon; MOONRS finds the circumstances of moonrise and moonset; MOONNF finds the times of new and full moon; ECLIPSE finds the circumstances of lunar and solar eclipses; Displays an eclipse in graphical form; ELOSC finds positions from osculating elliptical elements; RELEM converts ecliptic orbital elements from one epoch to another; PCOMET finds the position of a comet from parabolic elements; PFIT finds parabolic elements from observations; EFIT finds elliptical elements from observations; List of variables; Bibliography; Index.