File:Polaris comp s (25006858485).jpg

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Description

Polaris star Credit: DSS / Giuseppe Donatiello

(J2000) RA 02h 31m 48.7s Dec +89° 15′ 51″ Mag(v) = 1.98v Polaris (α Ursae Minoris), the Pole Star, is the brightest star in Ursa Minor, so called because it is very close to the North Celestial Pole.

It is a multiple star with five components: α UMi Aa a supergiant with two smaller companions α UMi B and α UMi Ab. In the stellar system are present other two distant components, α UMi C and α UMi D. Polaris A is a low amplitude classical Cepheid variable.
Date
Source Polaris comp s
Author Giuseppe Donatiello

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This image was originally posted to Flickr by gjdonatiello at https://flickr.com/photos/133259498@N05/25006858485. It was reviewed on 30 August 2017 by FlickreviewR and was confirmed to be licensed under the terms of the cc-zero.

30 August 2017

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12 February 2016

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