リファレンス

/meteors

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

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。

エクスポート

名前	種類	概要
`activeShowers`	関数	The showers active at a moment, strongest first, each with its rate then.
`apexPoint`	関数	The place on the Earth that faces the way the Earth is travelling round the Sun (the apex of its way): it sits on the morning side, which sweeps up more meteors than the evening side.
`darkness`	関数	How dark the sky is at a place, from 0 (the Sun is up) to 1 (the Sun is 6 degrees or more below the horizon, the end of civil twilight), rising evenly between: meteors are counted as seen only where it is dark.
`hourlyRateAt`	関数	How many meteors an ideal watcher at a place would count in an hour under a perfect dark sky, whether or not it is dark there: the sporadic background, a little more on the side that faces the Earth's way and a little less on the other, plus each active shower's rate times the sine of its radiant's height (none where the radiant is below the horizon).
`IAU_MDC`	定数	Where the IAU Meteor Data Center's lists are, when they were read, and how it asks to be cited.
`METEOR_HEIGHT_KM`	定数	The heights between which most meteors shine, in kilometres above the ground: they light up near the top and have burnt out by the bottom.
`METEOR_LINKS`	定数	Every shower of the table with its link to the IAU Meteor Data Center, in the table's order.
`METEOR_SHOWERS`	定数	The working list, in the order of the year.
`METEOR_SLOTS`	定数	The most streaks alive at once: the size of the one mesh they are drawn as.
`METEOR_STRENGTH_DEFAULT`	定数	How strongly the meteors are drawn when a page says nothing: 1, the look they have always had.
`METEORS_PER_SECOND_MAX`	定数	The most streaks drawn in a second, however strong the shower.
`MeteorShower`	型	One meteor shower of the working list.
`meteorSky`	関数	The meteor sky of a moment (see `MeteorSky`).
`MeteorSky`	型	What decides the meteors over the whole Earth at one moment, worked out once: the active showers with the places their radiants stand over, and the apex.
`ParentBody`	型	The comet or asteroid a shower's meteors come from, as the IAU Meteor Data Center names it.
`parentBodyOf`	関数	The parent body of a shower, found by the shower's IAU code, as the IAU Meteor Data Center's origin column names it.
`placeVector`	関数	A place as a unit vector: x to longitude 90 east on the equator, y to the north pole, z to longitude 0 on the equator (the realistic Earth's own axes).
`pointBeneath`	関数	The place on the Earth where a point of the sky stands overhead at a moment: for a shower's radiant, the middle of the half of the Earth its meteors fall on.
`readMeteorStrength`	関数	What a page's `meteors-strength` attribute means: a number from 0 (no streaks are drawn) to 1 (the full look), given as it is written; with none, or something that is not a number, `METEOR_STRENGTH_DEFAULT`.
`ShowerLink`	型	One shower's link to the IAU Meteor Data Center's lists, with where each figure of its row comes from.
`showerRate`	関数	How strong a shower is at a moment: its zenithal hourly rate then, 0 outside its dates.
`showersOfParent`	関数	The showers that come from one parent body, found by its designation (the whole designation, or just its number or name: `2P` and `Encke` both find `2P/Encke`).
`showerSource`	関数	Where a row's figures come from, in a sentence: the International Meteor Organization's table for the dates, the radiant, the speed and the rate, the IAU Meteor Data Center for the name, the parent body and the check, and which of the radiant and speed were replaced by the IAU's.
`solarLongitude`	関数	The Sun's longitude along the ecliptic for the equinox of 2000.0, in degrees: the measure the shower list times its maxima by.
`SPORADIC_HOURLY_RATE`	定数	The hourly rate taken for the meteors that belong to no shower (the sporadic background), for an ideal watcher under a perfect sky.
`streakPath`	関数	Where one streak runs: from `start` to `end`, in Earth radii from the centre, in the Earth's own axes.
`streaksPerSecond`	関数	How many streaks a second are drawn for a mean hourly rate over the dark part of the view: 2.5 a second where the whole view is dark on a night with no shower, more with a shower but squeezed (the 0.6th power) and never over nine, none where nothing in view is dark.

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。