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Hoshi Stars星

肉眼で見える星の名前・色・距離、88星座の線と境界、メシエ天体、そしてそれらを描くための7種類の図法を使えます。

「星」(ほし) は、夜空に光って見えるものです。 名前について（英語）

目次

リファレンス · 星・天体・位置の近くにあるもの (空と宇宙で)、隣り合う星座

NearestOptions型

リファレンスの説明と例は英語です。見出しと目次は日本語です。

The options of nearest and within.

インポート

import type { NearestOptions } from "@johnmorrisdotca/hoshi-stars/nearest";

定義

interface NearestOptions {
    count?: number;
    within?: number;
    kind?: "star" | "deep-sky";
    by?: "sky" | "space";
    date?: When;
    magnitude?: number;
    among?: readonly NearestThing[];
}

メンバー

名前型説明
count (省略可)number | undefined

How many to return, nearest first (default 10; within returns all it finds unless this is set).

within (省略可)number | undefined

Only answers this near: degrees by angle, light-years by space.

kind (省略可)"star" | "deep-sky" | undefined

What to look through: "star" (the default, the Yale bright stars) or "deep-sky" (the Messier objects).

by (省略可)"sky" | "space" | undefined

"sky" (the default) sorts by the angle on the sky; "space" sorts by the distance in space, from the parallaxes.

date (省略可)When | undefined

A moment: the stars are carried to it by their proper motion before the angles are measured. Precession turns every object the same way, so it does not change an angle. J2000 when left out.

magnitude (省略可)number | undefined

The faintest to include, as in stars({ magnitude }): a thing of exactly that magnitude is in. A thing with no magnitude is left out.

among (省略可)readonly NearestThing[] | undefined

Look through this list instead of the table that kind names, for example deepSky() from /deep-sky/ngc-ic, or [...stars(), ...nearbyStars()] to count the nearby stars with the bright ones.

例

import { nearest, type NearestOptions } from "@johnmorrisdotca/hoshi-stars/nearest";

const options: NearestOptions = { count: 5, magnitude: 3 };
console.log(nearest("Sirius", options).map((found) => found.thing.name));
[ 'Mirzam', 'Wezen', 'Adhara', 'Aludra', 'Saiph' ]

出力（このページを作ったときに実行した結果）

ソースを見るGitHub で編集@johnmorrisdotca/hoshi-stars 0.7.0 のソースから作成しました。

この日本語は、まだ日本語を母語とする方の確認を受けていません。訂正を歓迎します。