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Wakusei Planets惑星

The Sun, the planets and their moons as a clean line drawing, a shaded realistic drawing or a painted surface map, with real sizes, tilt and rotation, and the moons where they are at any date and time.

Wakusei is the Japanese word 惑星 for a planet. About the name

Contents

Overview

Reference

The <wakusei-body> element/element
The <wakusei-portrait> element: many bodies in one scene/portrait
Where the Sun, Moon and planets are for a date, in two scales, with the camera maths/space
The <wakusei-space> element: the Earth, Moon, Sun and planets in their places/space/element
Julian dates (and the julian package's functions), calendars, time scales, sidereal time and Mars time/time
The 5,080 stars you can see without a telescope: names, positions, proper motion, distance and colour (about 100 kB gzipped)/stars
The bodies nearest to a body on a date, in the sky or in space, and when two bodies come closest: nearest, within, closestApproach and conjunctions/nearest
Ten famous spacecraft (Voyager, New Horizons, Pioneer, Cassini, Galileo, Juno, Parker Solar Probe, Webb): facts, events, and where each is at any date from launch to the end of its record/spacecraft
The Sun and Moon from a place: position, sunrise and sunset, Moon rise, set and phase, with suncalc 2's names and a better engine/suncalc
The same, with suncalc 1's conventions (radians, azimuth from south)/suncalc/legacy
Every dwarf planet's fitted position table (Ceres and the seven slower ones) and the moon theories for Jupiter's and Saturn's moons, so heliocentric and moonVector are as close as the accuracy guide says/tables
- Overview
Ceres's fitted position table, 1900 to 2100 (about 14 kB gzipped)/tables/ceres
- Overview
The fitted position tables of Orcus, Haumea, Quaoar, Makemake, Gonggong, Eris and Sedna, 1800 to 2200 (about 5 kB gzipped)/tables/dwarfs
- Overview
Finer VSOP87B series for Mercury to Neptune, within 2 arc-seconds of Horizons on 60 dates from 1800 to 2200 (about 32 kB gzipped; not in ./tables)/tables/vsop
- Overview
Io, Europa, Ganymede and Callisto from the theory L1.2 (Lainey, Duriez and Vienne), 1130 to 2760 (about 5 kB gzipped)/tables/galilean
- Overview
Mimas, Enceladus, Tethys, Dione, Rhea, Titan and Iapetus from the theory TASS1.7 (Vienne and Duriez) (about 7 kB gzipped)/tables/saturn-moons
- Overview
How a body is drawn with three.js/look
Bodies as objects for your own three.js scene/painter
Every body's shaded look/all
- Overview
The Sun's shaded look/sun
- Overview
Mercury's shaded look/mercury
- Overview
Venus's shaded look/venus
- Overview
Mars's shaded look/mars
- Overview
Jupiter's shaded look/jupiter
- Overview
Saturn's shaded look/saturn
- Overview
Uranus's shaded look/uranus
- Overview
Neptune's shaded look/neptune
- Overview
Pluto's shaded look/pluto
- Overview
The dwarf planets: shaded looks (Ceres, Orcus, Haumea, Quaoar, Makemake, Gonggong, Eris, Sedna)/dwarfs
- Overview
The Moon's shaded look/moons-earth
- Overview
Phobos and Deimos: shaded looks/moons-mars
- Overview
The Galilean moons: shaded looks/moons-jupiter
- Overview
Saturn's moons: shaded looks/moons-saturn
- Overview
Uranus's moons: shaded looks/moons-uranus
- Overview
Neptune's moons: shaded looks/moons-neptune
- Overview
Pluto's moons: shaded looks/moons-pluto
- Overview
The dwarf planets' moons: shaded looks (Vanth, Hiʻiaka, Namaka, Dysnomia)/moons-dwarf
- Overview
The Earth, drawn by chikyu-earth/earth
- Overview
Pure coordinate conversions/coordinates
Facts, line drawings and positions

Guides

Reference · The same, with suncalc 1's conventions (radians, azimuth from south)

`LegacyMoonIllumination`type

The Moon's illumination in suncalc 1's terms: the lit fraction, the phase 0 to 1, and the bright limb's angle in radians, negative while the Moon waxes and positive while it wanes.

Import it

import type { LegacyMoonIllumination } from "@johnmorrisdotca/wakusei-planets/suncalc/legacy";

Definition

interface LegacyMoonIllumination {
    fraction: number;
    phase: number;
    angle: number;
}

Members

Name	Type	Description
`fraction`	`number`
`phase`	`number`
`angle`	`number`

Examples

import { getMoonIllumination, type LegacyMoonIllumination } from "@johnmorrisdotca/wakusei-planets/suncalc/legacy";

const m: LegacyMoonIllumination = getMoonIllumination(new Date(Date.UTC(2026, 10, 24, 14)));
console.log(m.fraction >= 0 && m.fraction <= 1);

true

What it prints (run when this page was built)

View source Edit on GitHubMade from the source of @johnmorrisdotca/wakusei-planets 0.24.0.