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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 · /chart

bodyRadiusfunction

How big a body's dot is drawn, in pixels: a star's rule (brighter is larger), carried to magnitude -4.6 so that Venus is larger than Sirius. A body with a true size is drawn as large as that when it is larger.

Import it

import { bodyRadius } from "@johnmorrisdotca/hoshi-stars/chart";

Definition

function bodyRadius(magnitude: number, limit: number, grow: number): number

Parameters

NameTypeDescription
magnitudenumber

The body's magnitude.

limitnumber

The chart's magnitude setting (the faintest star at the opening zoom).

grownumber

How much the zoom enlarges a dot (1 at the opening zoom).

Returns

number

The radius in pixels.

Examples

import { bodyRadius } from "@johnmorrisdotca/hoshi-stars/chart";

console.log(bodyRadius(-4.4, 5, 1) > bodyRadius(1.2, 5, 1));
// true
true

What it prints (run when this page was built)

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