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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 · How well each value of a star is known: the source and error of its position, magnitude, colour, parallax and proper motion, and a grade A, B or C

GRADE_RULESconstant

The numbers the grade is decided by: a distance is good under distance.good of the parallax and fair up to distance.fair (the same bands as distanceQuality), and a position is modern when its error, or its resolution where it has no stated error, is at most modernPositionArcsec.

Import it

import { GRADE_RULES } from "@johnmorrisdotca/hoshi-stars/accuracy";

Definition

const GRADE_RULES: { readonly distance: { readonly good: 0.05; readonly fair: 0.2; }; readonly modernPositionArcsec: 2; } = { distance: { good: QUALITY_LIMITS.good, fair: QUALITY_LIMITS.rough }, modernPositionArcsec: 2 } as const

Members

NameTypeDescription
distance{ readonly good: 0.05; readonly fair: 0.2; }
modernPositionArcsec2

Examples

import { GRADE_RULES } from "@johnmorrisdotca/hoshi-stars/accuracy";

console.log(GRADE_RULES.distance.good * 100, GRADE_RULES.distance.fair * 100, GRADE_RULES.modernPositionArcsec); // 5 20 2
5 20 2

What it prints (run when this page was built)

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