`MeteorShower`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 meteor shower of the working list.

インポート

import type { MeteorShower } from "@johnmorrisdotca/chikyu-earth/meteors";

定義

interface MeteorShower {
    code: string;
    iau: number;
    name: string;
    nameJa: string;
    start: readonly [
        month: number,
        day: number
    ];
    end: readonly [
        month: number,
        day: number
    ];
    peak: readonly [
        month: number,
        day: number
    ];
    peakSolarLongitude: number;
    radiant: {
        ra: number;
        dec: number;
    };
    speedKmS: number;
    populationIndex: number;
    zhr: number | null;
    parent?: string;
}

メンバー

名前	型	説明
`code`	`string`	The IAU's three-letter code: `PER` for the Perseids.
`iau`	`number`	The IAU's number for the shower.
`name`	`string`
`nameJa`	`string`	The name used in Japan.
`start`	`readonly [month: number, day: number]`	The first day of activity, as month (1 to 12) and day. A shower may run over the new year.
`end`	`readonly [month: number, day: number]`	The last day of activity.
`peak`	`readonly [month: number, day: number]`	The day of the maximum in 2026; in other years it can fall a day either side. `peakSolarLongitude` is the lasting figure.
`peakSolarLongitude`	`number`	The Sun's longitude at the maximum, in degrees, for the equinox of 2000.0: where the Earth is on its orbit, whatever the calendar says.
`radiant`	`{ ra: number; dec: number; }`	The radiant at the maximum: right ascension and declination, in degrees.
`speedKmS`	`number`	The speed the meteors meet the atmosphere at, in kilometres a second: 11 is very slow, 72 very fast.
`populationIndex`	`number`	The population index r: 2.0 to 2.5 has more bright meteors than average, above 3.0 more faint ones.
`zhr`	`number \| null`	The zenithal hourly rate at the maximum: what an ideal watcher would count in an hour under a perfect sky with the radiant overhead. `null` where the list says the rate varies from year to year.
`parent` (省略可)	`string \| undefined`	The comet or asteroid whose dust it is, where a source used here names one.

例

import { METEOR_SHOWERS, type MeteorShower } from "@johnmorrisdotca/chikyu-earth/meteors";

const perseids: MeteorShower | undefined = METEOR_SHOWERS.find((shower) => shower.code === "PER");
console.log(perseids?.name, perseids?.zhr, perseids?.parent);

Perseids 100 comet 109P/Swift-Tuttle

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/chikyu-earth 0.51.1 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。

MeteorShower型

定義

メンバー

例

`MeteorShower`型