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Author image Sergey Krushinsky
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NAME

Astro::Montenbruck::Ephemeris::Planet::Pluto - Pluto.

SYNOPSIS

  use Astro::Montenbruck::Ephemeris::Planet::Pluto;
  my $planet = Astro::Montenbruck::Ephemeris::Planet::Pluto->new();
  my @geo = $planet->position($t); # apparent geocentric ecliptical coordinates

DESCRIPTION

Child class of Astro::Montenbruck::Ephemeris::Planet, responsible for calculating Pluto position.

The coordinates are first calculated relative to the fixed ecliptic of 1950, and then transformed to the equinox of date. This method is nesessary because of the high inclination of Pluto's orbit.

CAVEATS

The routine is applicable only between years 1890 and 2100.

  The reason for this is that the series expansion used was not derived from
  perturbation theory, but from a Fourier analysis of a numerically integrated
  ephemeris covering this period of time. Even a few years before 1890 or after
  2100, the errors in the calculated coordinates grow very sharply, reaqching
  values of more than 0.5 arc-degrees.

  — O.Montenbruck, Th.Pfleger "Astronomy on the Personal Computer"

METHODS

Astro::Montenbruck::Ephemeris::Planet::Pluto->new

Constructor.

$self->heliocentric($t)

See description in Astro::Montenbruck::Ephemeris::Planet.

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.