#!/usr/bin/perl

use strict;
use warnings;

use Astro::Coords;
use Astro::Telescope;
use Math::Trig 'deg2rad';
use Time::Piece;

# Observer latitude, longitude and altitude
# in decimal degrees and meters:
my ($lat, $lon, $alt) = (38.899, -77.038, 16.68);

my $star = Astro::Coords->new(
  name => 'Betelgeuse',
  ra   => '05h 55m 10.30536s',
  dec  => '07 24 25.4304',
  type => 'j2000',
);

my $scope = Astro::Telescope->new(
  Name =>"$lat $lon $alt",
  Lat  => deg2rad($lat),
  Long => deg2rad($lon),
  Alt  => $alt
);

$star->telescope($scope);
$star->datetime(Time::Piece->new);

print    $star->name, "\n",
"RA : ", $star->ra,   "\n",
"DEC:",  $star->dec,  "\n\n",

"NOW: ", scalar localtime, "\n",
"OBS: ", $scope->name,     "\n\n",

"AZ: ",  $star->az(format=>'deg'), "°\n", # Azimuth
"EL: ",  $star->el(format=>'deg'), "°\n"; # Elevation