リファレンス · 立体の星座 (視差から星を空間に置き、誤差の範囲と地球からの視線を示す)

`StarIn3D`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。

One star of a figure in space, as seen from the viewpoint (the Earth, or another star).

インポート

import type { StarIn3D } from "@johnmorrisdotca/hoshi-stars/constellation-3d";

定義

interface StarIn3D {
    star: Star;
    id: string;
    quality: DistanceQuality;
    relativeError: number | undefined;
    sight: {
        origin: Point3;
        direction: Point3;
        near: number | undefined;
        best: number | undefined;
        far: number | undefined;
    };
    position: Point3 | undefined;
    nearPosition: Point3 | undefined;
    farPosition: Point3 | undefined;
    lightYears: number | undefined;
    range: readonly [
        near: number,
        far: number
    ] | undefined;
    wide: boolean;
}

メンバー

名前	型	説明
`star`	`Star`	The catalogue's star.
`id`	`string`	A key that stays the same: `hr-2061`.
`quality`	`DistanceQuality`	How well the distance is known.
`relativeError`	`number \| undefined`	The parallax's error as a share of the parallax (0.05 is 5%), or `undefined` where the parallax has no stated error or there is no parallax.
`sight`	`{ origin: Point3; direction: Point3; near: number \| undefined; best: number \| undefined; far: number \| undefined; }`	The Earth's line of sight to the star: it starts at the Earth and runs along `direction`, and the star lies somewhere on it. The distances below are measured along it from the Earth (`atLightYears`).
`position`	`Point3 \| undefined`	The star's place: `undefined` for a star with no parallax, which is never put at a guessed distance.
`nearPosition`	`Point3 \| undefined`	The nearest and the farthest place one standard error of the parallax allows; `undefined` where there is no error. The farthest is `undefined` too where the error reaches the parallax and the star could be any distance beyond.
`farPosition`	`Point3 \| undefined`
`lightYears`	`number \| undefined`	The distance from the viewpoint in light-years, or `undefined` where there is no parallax.
`range`	`readonly [near: number, far: number] \| undefined`	The nearest and farthest distance from the viewpoint within one standard error; `undefined` where there is no error. The farthest is `Infinity` where the error reaches the parallax.
`wide`	`boolean`	True when the error bar is wider than the distance (the error is over 41% of the parallax, or reaches it): the star could be anywhere along a long stretch, so a picture shows the whole range and no point in the middle.

例

import { constellationIn3D, type StarIn3D } from "@johnmorrisdotca/hoshi-stars/constellation-3d";

const star: StarIn3D = constellationIn3D("Ori").stars[0]!;
console.log(star.id, star.quality);

hr-2061 fair

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 0.47.0 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。

StarIn3D型

定義

メンバー

例

`StarIn3D`型