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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 · Nearby stars: Proxima Centauri, Barnard's Star and about 5,600 more, with distance and error

NearbyFlagstype

What to be careful about for one star.

Import it

import type { NearbyFlags } from "@johnmorrisdotca/hoshi-stars/nearby";

Definition

interface NearbyFlags {
    coarsePosition: boolean;
    excludedFromSpace: boolean;
    ambiguousMatch: boolean;
}

Members

NameTypeDescription
coarsePositionboolean

The position is the Yale catalogue's, carried from 1900 to 2000, not a 2MASS position: see positionErrorArcsec.

excludedFromSpaceboolean

The parallax is 0 or less, so the star has no distance and a query by space leaves it out.

ambiguousMatchboolean

The match is not clear: the star may also be one of the bright stars (a bright star lies within 30 arc-seconds), or several 2MASS sources fit it.

Examples

import { nearbyStarByName, type NearbyFlags } from "@johnmorrisdotca/hoshi-stars/nearby";

const flags: NearbyFlags = nearbyStarByName("Proxima Centauri")!.flags;
console.log(flags.coarsePosition);
false

What it prints (run when this page was built)

View sourceEdit on GitHubMade from the source of @johnmorrisdotca/hoshi-stars 0.7.0.