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Hoshi Stars星

The stars you can see without a telescope, with names, colours and distances; the 88 constellations with their lines and boundaries; the Messier objects; and seven map projections to draw them on.

Hoshi is the Japanese word 星 for a star. About the name

Contents

Reference · The faint stars: about 3 million of UCAC4's, to magnitude 12, in sky tiles loaded for the part of the sky you show

FAINT_LEVELSconstant

The tile levels, brightest first. A star lies in the first level whose faintest it does not pass, so level 0 holds everything to magnitude 10, level 1 the stars from 10 to 11 and level 2 those from 11 to 12. A level's tiles are bands of declination bandDegrees high, each cut into as many tiles along right ascension as keep a tile about as wide as it is tall at the edge of the band nearer the equator.

Import it

import { FAINT_LEVELS } from "@johnmorrisdotca/hoshi-stars/faint";

Definition

const FAINT_LEVELS: readonly { readonly faintest: number; readonly bandDegrees: number; }[] = [
    { faintest: 10, bandDegrees: 10 },
    { faintest: 11, bandDegrees: 6 },
    { faintest: 12, bandDegrees: 5 },
]

Examples

import { FAINT_LEVELS } from "@johnmorrisdotca/hoshi-stars/faint";

console.log(FAINT_LEVELS.map((level) => level.faintest)); // [10, 11, 12]
[ 10, 11, 12 ]

What it prints (run when this page was built)

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/hoshi-stars 0.47.0.