NAME

Astro::Montenbruck::Ephemeris::Planet - Base class for a planet.

SYNOPSIS

  package Astro::Montenbruck::Ephemeris::Planet::Mercury;
  use base qw/Astro::Montenbruck::Ephemeris::Planet/;
  ...

  sub  heliocentric {
    # implement the method
  }

DESCRIPTION

Base class for a planet. Designed to be extended. Used internally in Astro::Montenbruck::Ephemeris modules. Subclasses must implement heliocentric method.

SUBROUTINES/METHODS

$planet = Astro::Montenbruck::Ephemeris::Planet->new( $id )

Constructor. $id is identifier from @PLANETS array (See "EXPORTED CONSTANTS").

$self->apparent($t, $lbr, $sun, $nut_func)

Geocentric ecliptic coordinates of a planet, referred to the true equinox of date.

Arguments

• $t — time in Julian centuries since J2000: (JD-2451545.0) / 36525.0

• $lbr — arrayref of heliocentric coordinates of the planet returned by $self->heliocentric($t)

• $sun — ecliptic geocentric coordinates of the Sun (hashref with 'l', 'b', 'r' keys), returned by Astro::Montenbruck::Ephemeris::Planet::Sun::sunpos($t)

• $nut_func — function for converting geocntric coordinates from mean to true equinox of date, returned by Astro::Montenbruck::NutEqu::mean2true($t)

Returns

Array of geocentric ecliptical coordinates.

• longitude, arc-degrees

• latitude, arc-degrees

• distance from Earth, AU

$self->heliocentric($t)

Given time in centuries since epoch 2000.0, calculate heliocentric ecliptical coordinates ($l, $b, $r).

• $l — longitude, arc-degrees

• $b — latitude, arc-degrees

• $r — distance from Earth, A.U.

EXPORTED CONSTANTS

• $MO — Moon

• $SU — Sun

• $ME — Mercury

• $VE — Venus

• $MA — Mars

• $JU — Jupiter

• $SA — Saturn

• $UR — Uranus

• $NE — Neptune

• $PL — Pluto

• @PLANETS — array containing all the ids listed above

AUTHOR

Sergey Krushinsky, <krushi at cpan.org>

COPYRIGHT AND LICENSE

Copyright (C) 2009-2021 by Sergey Krushinsky

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.