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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 · A star's profile: temperature, size, luminosity and disc size with their uncertainty, limb darkening, and the measured shapes of Altair, Regulus and Vega

Unknowntype

Why a figure in a profile could not be worked out, so a page can say it plainly: "no-colour-or-type" the catalogue gives no colour and no usable type, "no-parallax" no parallax, "poor-parallax" a parallax whose error is half of it or more, "implausible-parallax" a parallax that gives a size no star of that kind has, "no-typical-radius" no typical size is published for the type, "no-class" no luminosity class, "odd-type" a type the scales do not cover (carbon, S, Wolf-Rayet, white dwarf).

Import it

import type { Unknown } from "@johnmorrisdotca/hoshi-stars/profile";

Definition

type Unknown = "no-colour-or-type" | "no-parallax" | "poor-parallax" | "implausible-parallax" | "no-typical-radius" | "no-class" | "odd-type";

Examples

import { starByName } from "@johnmorrisdotca/hoshi-stars";
import { starProfile, type Unknown } from "@johnmorrisdotca/hoshi-stars/profile";

const why: Unknown | undefined = starProfile(starByName("Deneb")!).unknown.radius;
console.log(why);
no-parallax

What it prints (run when this page was built)

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