Astro:...:Pluto(3pm)

💫 NAME 💫

Astro::Montenbruck::Ephemeris::Planet::Pluto — literally just Pluto. The planet. Well, the dwarf planet, but we don't gatekeep here 🫶

This is a page from the User Contributed Perl Documentation collection, bestie, so you know it's the good community stuff.

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✨ SYNOPSIS ✨

okay so here's how you actually use it:

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

That's it. Three lines. Main character energy 👑

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🪐 DESCRIPTION 🪐

So this class is a child class of Astro::Montenbruck::Ephemeris::Planet, and its whole entire job — its purpose, its calling, its moment — is calculating the position of Pluto. That's it. That's the vibe. 💅

Here's the interesting part though (iykyk): the coordinates get calculated first relative to the fixed ecliptic of 1950, and then transformed to the equinox of date. And bestie, this method is nesessary — like, genuinely required — because Pluto's orbit has such a high inclination. No shortcuts, no cap.

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🌸 CAVEATS 🌸

⚠️ The routine is applicable only between years 1890 and 2100. Like, that's the whole window. Do not try it outside. Do not pass go.

Here's why, straight from the source — and imma quote it exactly because it's kind of iconic:

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"

So yeah. Stay in your lane, stay in your century. 💀 The errors get dramatic — more than 0.5 arc-degrees — and not the fun kind of dramatic.

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🎀 METHODS 🎀

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

Constructor. It constructs. That's the whole thing. You make one, you get a Pluto object, slay. ✨

$self->heliocentric($t)

For what this one does, go peek at the description in Astro::Montenbruck::Ephemeris::Planet — it lives over there, bestie, this is just the Pluto-flavored version. 🦋

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👑 AUTHOR 👑

Sergey Krushinsky, "<krushi at cpan.org>" — go say hi, he made this 💖

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🌈 COPYRIGHT AND LICENSE 🌈

Copyright (C) 2009-2022 by Sergey Krushinsky

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself. Free as in, go wild, just keep it free. 🧚

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and that's the whole page, bestie!! 🎀✨🫶

This little beauty is from the User Contributed Perl Documentation, page name Astro:...:Pluto(3pm), generated with perl v5.42.2 and dated 2026-02-15. Go calculate some Pluto positions, you absolute icon 💜🍓