Sine quadrant
id:
sine-quadrant-304-15045447
title:
Sine quadrant
text:
A sine quadrant, sometimes known as a "sinecal quadrant", was a type of quadrant used by medieval Arabic astronomers. The instrument could be used to measure celestial angles, tell time, find directions, perform trigonometric computations, and determine the apparent positions of any celestial object for any time. The name is derived from the Arabic rub meaning 'a quarter' and mujayyab meaning 'marked with sine'. The sine quadrant was described by Muhammad ibn Mūsā al-Khwārizmī in 9th-century Bag
brand slug:
wiki
category slug:
encyclopedia
description:
Type of quadrant used by medieval Arabic astronomers
original url:
https://en.wikipedia.org/wiki/Sine_quadrant
date created:
date modified:
2023-05-29T06:14:28Z
main entity:
{"identifier":"Q7522373","url":"https://www.wikidata.org/entity/Q7522373"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/4/42/Front_of_Quadrant.JPG","width":1280,"height":960}
fields total:
13
integrity:
15