Astro::Utils - Utility package for Astronomical Calculations.
The entire algorithm is based on the book "Astronomical Algorithms", 2nd Edition by Jean Meeus,(C)1998, published by Willmann-Bell, Inc. I needed this for one of my disrtribution Calendar::Bahai.
The calculated times are in Terrestrial Dynamical Time (TDT or TT), a replacement for Ephemeris Times(ET).TDT is a uniform time used for astronomical calculations.
use strict; use warnings;
print "Mar'2015 Equinox (UTC): ", calculate_equinox ('mar', 'utc', 2015),"\n";
print "Mar'2015 Equinox (TDT): ", calculate_equinox ('mar', 'tdt', 2015),"\n";
print "Jun'2015 Solstice (UTC): ", calculate_solstice('jun', 'utc', 2015),"\n";
print "Jun'2015 Solstice (TDT): ", calculate_solstice('jun', 'tdt', 2015),"\n";
print "Sep'2015 Equinox (UTC): ", calculate_equinox ('sep', 'utc', 2015),"\n";
print "Sep'2015 Equinox (TDT): ", calculate_equinox ('sep', 'tdt', 2015),"\n";
print "Dec'2015 Solstice (UTC): ", calculate_solstice('dec', 'utc', 2015),"\n";
print "Dec'2015 Solstice (TDT): ", calculate_solstice('dec', 'tdt', 2015),"\n";
The param $type can be either 'mar' or 'sep'. The param $timezone can be either 'UTC' or 'TDT'. And finally $year can be anything between -1000 & 3000. All parameters are required.
The param $type can be either 'jun' or 'dec'. The param $timezone can be either 'UTC' or 'TDT'. And finally $year can be anything between -1000 & 3000. All parameters are required.
Mohammad S Anwar, <mohammad.anwar at yahoo.com>
<mohammad.anwar at yahoo.com>
Please report any bugs or feature requests to bug-astro-utils at rt.cpan.org, or through the web interface at http://rt.cpan.org/NoAuth/ReportBug.html?Queue=Astro-Utils. I will be notified and then you'll automatically be notified of progress on your bug as I make changes.
bug-astro-utils at rt.cpan.org
You can find documentation for this module with the perldoc command.
You can also look for information at:
RT: CPAN's request tracker (report bugs here)
AnnoCPAN: Annotated CPAN documentation
Copyright (C) 2015 - 2017 Mohammad S Anwar.
This program is free software; you can redistribute it and / or modify it under the terms of the the Artistic License (2.0). You may obtain a copy of the full license at:
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To install Astro::Utils, copy and paste the appropriate command in to your terminal.
perl -MCPAN -e shell
For more information on module installation, please visit the detailed CPAN module installation guide.