Astro::Montenbruck::CoCo - Coordinates conversions.
Version 0.01
Celestial sphera related calculations used by AstroScript modules.
"equ2ecl($alpha, $delta, $epsilon)"
"ecl2equ($lambda, $beta, $epsilon)"
Conversion of equatorial into ecliptic coordinates
$alpha — right ascension
$delta — declination
$epsilon — ecliptic obliquity
Ecliptic coordinates:
$lambda
$beta
All arguments and return values are in degrees.
Conversion of ecliptic into equatorial coordinates
$lambda — celestial longitude
$beta — celestial latitude
Equatorial coordinates:
Conversion of equatorial into horizontal coordinates
$h — the local hour angle, in degrees, measured westwards from the South. h = Local Sidereal Time - Right Ascension
h = Local Sidereal Time - Right Ascension
$delta — declination, in arc-degrees
$phi — the observer's latitude, in arc-degrees, positive in the nothern hemisphere, negative in the southern hemisphere.
Horizontal coordinates:
azimuth, in degrees, measured westward from the South
altitude, in degrees, positive above the horizon
Convert horizontal to equatorial coordinates.
$az — azimuth, in degrees, measured westward from the South
$alt — altitude, in degrees, positive above the horizon
hour angle, in arc-degrees
declination, in arc-degrees
You can find documentation for this module with the perldoc command.
perldoc Astro::Montenbruck::CoCo
Sergey Krushinsky, <krushi at cpan.org>
<krushi at cpan.org>
Copyright (C) 2009-2019 by Sergey Krushinsky
This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
To install Astro::Montenbruck, copy and paste the appropriate command in to your terminal.
cpanm
cpanm Astro::Montenbruck
CPAN shell
perl -MCPAN -e shell install Astro::Montenbruck
For more information on module installation, please visit the detailed CPAN module installation guide.