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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 sky out to a distance, in layers: the stars and galaxies nearer than 10, 50, 100, 500 or 1,000 light-years, each distance band its own colour, the ones with an uncertain distance kept apart, and none placed at a guess

deepSkyInputfunction

A deep-sky object with a galaxy's distance (galaxyDistance of /deep-sky) as a thing with a distance. The range is the lowest and highest statement the source holds; the distance is fair where the statements agree and rough where they disagree by more than 1.2 times. An object with no distance (null) has none.

Import it

import { deepSkyInput } from "@johnmorrisdotca/hoshi-stars/distance";

Definition

function deepSkyInput(object: { id: string; name: string | undefined; rightAscension: number; declination: number; magnitude: number | undefined; }, distance: Pick<GalaxyDistance, "lightYears" | "spread" | "disagree"> | null): DistanceInput

Parameters

NameTypeDescription
object{ id: string; name: string | undefined; rightAscension: number; declination: number; magnitude: number | undefined; }

A deep-sky object.

distancePick<GalaxyDistance, "lightYears" | "spread" | "disagree"> | null

Its distance, or null.

Returns

DistanceInput

The input for layersByDistance.

Examples

import { deepSkyObject, galaxyDistance } from "@johnmorrisdotca/hoshi-stars/deep-sky";
import { deepSkyInput } from "@johnmorrisdotca/hoshi-stars/distance";

const m31 = deepSkyObject("M31")!;
const andromeda = deepSkyInput(m31, galaxyDistance(m31));
console.log(andromeda.id, Math.round(andromeda.lightYears! / 1000), andromeda.certainty);
M31 2674 fair

What it prints (run when this page was built)

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