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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

Reference · 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

conjunctionsfunction

The close approaches of every pair of bodies in a span, soonest first: each pair's separation is scanned in coarse steps (the fastest body goes round forty times in the step, at most two days), and every minimum inside the span that is within within is narrowed to about a second of time. Each is the same as closestApproach would return for that pair and that minimum.

Import it

import { conjunctions } from "@johnmorrisdotca/wakusei-planets/nearest";

Definition

function conjunctions(options: ConjunctionOptions): Approach[]

Parameters

NameTypeDescription
optionsConjunctionOptions

from and to, within (degrees for the sky, default 5; kilometres for space, default all), bodies (default the Sun and Mercury to Neptune, less the body the sky is seen from), by and observer.

Returns

Approach[]

The approaches, soonest first, each with its moment, separation and the accuracy to expect.

Examples

import { conjunctions } from "@johnmorrisdotca/wakusei-planets/nearest";

const found = conjunctions({ from: Date.UTC(2023, 0, 1), to: Date.UTC(2024, 0, 1), bodies: ["venus", "jupiter"], within: 2 });
console.log(found.map((one) => `${one.a}-${one.b} ${one.time.toISOString().slice(0, 10)} ${one.angle?.toFixed(2)}`).join("\n"));
venus-jupiter 2023-03-02 0.49

What it prints (run when this page was built)

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