showerRate関数
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。
How strong a shower is at a moment: its zenithal hourly rate then, 0 outside its dates. The list gives the rate at the maximum and the first and last days of activity; between them this draws the simplest curve that fits: the rate falls away from the maximum by the same factor for each degree the Earth moves on, down to half a meteor an hour at the start of the first day and the end of the last. A real shower's curve differs (the Quadrantids' maximum lasts hours, the Taurids' weeks). A shower the list calls variable gives 0.
インポート
import { showerRate } from "@johnmorrisdotca/chikyu-earth/meteors";定義
function showerRate(shower: MeteorShower, ms: number): number引数
| 名前 | 型 | 説明 |
|---|---|---|
shower | MeteorShower | A shower of |
ms | number | The moment, in milliseconds since the epoch. |
戻り値
number
The zenithal hourly rate, in meteors an hour.
例
import { METEOR_SHOWERS, showerRate } from "@johnmorrisdotca/chikyu-earth/meteors";
const geminids = METEOR_SHOWERS.find((shower) => shower.code === "GEM")!;
console.log(showerRate(geminids, Date.UTC(2026, 11, 14, 8)).toFixed(0), showerRate(geminids, Date.UTC(2026, 5, 1))); // "150" 0132 0出力（このページを作ったときに実行した結果）
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。