File indexing completed on 2024-09-29 09:15:49

 #!/usr/bin/perl
 #
 # read-hippo.pl  For reading kstars hipNNN.dat data files
 
 use strict;
 my $ERROR;
 my @STARS;
 my @DEC_REGIONS = (
 #    [90, 50], [50, 20], [20, -20], 
     [-20, -50], [-50, -90]);
 
 my $cnt;
 
 while(<>) {
     m/^\s*#/ and do {  next};
     m/\S/ or     do {  next;};
     chomp;
     my $star = kstars_unpack($_) or do {
         warn sprintf("%4d: FORMAT ERROR ($ERROR):\n$_\n", $.);
         next;
     };
     $star->{line} = $.;
     $star->{name} or next;
     push @STARS, $star;
     #print_star_line($star);
 
 }
 
 @STARS = sort { $b->{mag} <=> $a->{mag} } @STARS;
 for my $star ( @STARS ) {
     printf "%4.1f %s\n", $star->{mag}, $star->{name};
     #print_star_line($star);
 }
 
 exit;
 #my @missing = grep {! $_->{gname} || $_->{gname} =~ /^xx/} @STARS;
  
 
 
 sub print_star_line {
     my $star = shift;
     #printf "%8.2f ", $star->{pm};
     printf "%s %s %s%s%s %s%s%s %s%s",
     @$star{qw/ra_str dec_str dra ddec parallax mag bv_index spec_type mult/};
     my $s2;
     $star->{var_range} || $star->{var_period} and do {
         $s2 = sprintf " %4.2f %6.2f", @$star{qw/var_range var_period/};
     };
     $star->{name} || $star->{gname} and $s2 ||= " " x 12;
     $s2 and print $s2;
     $star->{name} and print $star->{name};
     $star->{name} and $star->{gname} and print " ";
     $star->{gname} and print ": $star->{gname}";
     print "\n";
 }
 #print_stars(@missing);
 exit;
 
 #==========================================================================
 #
 #
 
 
 sub print_stars {
     my @stars = sort {$a->{mag} <=> $b->{mag}} @_;
     for my $dec_region (@DEC_REGIONS) {
         my ($top, $bot) = @$dec_region;
         print "\nFrom $top to $bot:\n";
         for my $star ( @stars) {
             my $dec = $star->{dec};
             next unless $dec < $top and $dec >= $bot;
             printf "%4d: %s %s %6.2f %2s %8s %s\n\n",
                @$star{(qw/line ra_hm dec_hm mag spec_type gname name/)};
 
         }
     }
 }
 
 sub kstars_unpack {
     my $line = shift;
     chomp $line;
     my $s1 = substr($line, 0, 60, "");
     $s1 =~ m{^(\d{6}\.\d\d)\s    # RA  HHMMSS.SS
             ([+-]\d{6}\.\d)\s    # DEC DDMMSS.SS
             ([+-]\d{6}\.\d)      # dRA/dt 
             ([+-]\d{6}\.\d)      # dDec/dt
                 (\d{5}\.\d)\s    # Parallax
               ([\d-]\d\.\d\d)    # Magnitude
               ([\d-]\d\.\d\d)    # B-V index
               ([A-Z ].|sd)\s     # Spectral Type
               (\d)               # Multiplicity
           }x or do 
     {
         $ERROR = "Positional Error (0-59)";
         return;
     };
     my $star = {
         ra_str    => $1,
         dec_str   => $2,
         dra       => $3,
         ddec      => $4,
         parallax  => $5,
         mag       => $6,
         bv_index  => $7,
         spec_type => $8,
         mult      => $9,
         line      => $.,
         pm        => sqrt($3 * $3 + $4 * $4),
     };
     $star->{ra}       = hms_to_hour($star->{ra_str});
     $star->{dec}      = hms_to_hour($star->{dec_str}); 
     $star->{ra_hm}    = hms_to_hm($star->{ra_str});
     $star->{dec_hm}   = hms_to_hm($star->{dec_str});
 
     $line or return $star;
 
     my $s2 = substr($line, 0, 12, "");
     #print "$s2\n";
     $s2 =~ m/^\s+(\d\.\d\d)?   # var range
               \s+(\d+\.\d\d)?  # var period
               /x or do 
     {
         $ERROR = "Variable params (61 - 71)";
         return;
     };
     $star->{var_range}  = $1;
     $star->{var_period} = $2;
     $line or return $star;
     
     $star->{gname} = $line =~ s/\s*:\s*(\S.*)$// ? $1 : "";
     $star->{name}  = $line ? $line : "";
     return $star;
 }
 
 sub hms_to_hour {
     my $string = shift;
     $string =~ /^([+-]?\d\d)(\d\d)(\d\d(?:\.\d*)?)/ or return;
     my ($h, $m, $s) = ($1, $2, $3);
     my $sign = $h < 0 ? -1 : 1;
     $h = abs($h);
     $m += $s / 60;
     return $sign * ($h + $m / 60);
 }
 
 sub hms_to_hm {
     my $string = shift;
     $string =~ s/([+-]?\d\d)(\d\d).*/$1:$2/;
     return $string;
 }