大陵五

Also known as Beta Persei, 26 Persei

Algol , designated Beta Persei (β Persei, abbreviated Beta Per, β Per), known colloquially as the Demon Star, is a bright multiple star in the constellation of Perseus and one of the first non-nova variable stars to be discovered.

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Algol is a bright star in the constellation Perseus, also known as the "Demon Star," that consists of multiple stars orbiting together. It is historically significant because it was one of the earliest variable stars discovered—stars whose brightness visibly changes over time—making it important in the development of astronomy.

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Wikidata facts

Constellation: Perseus
Distance from Earth: 93
Diameter: 5750000
Variable-star type: eclipsing binary star
Image: Algol AB movie imaged with the CHARA interferometer - labeled.gif

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Commons category: Algol
catalog code: UBV M 9337
spectral class: B8
parallax: 36.27
absolute magnitude: -0.15
color index: -0.37
radial velocity: 4.0
Commons gallery: Algol
described by source: Encyclopædia Britannica 11th edition
apparent magnitude: 2.08
stellar rotational velocity: 67
right ascension: 47.04221855625
declination: 40.95564667028
effective temperature: 12445
epoch: J2000.0
right ascension component of proper motion: 11
declination component of proper motion: -28
age estimated by a dating method: 570
on focus list of Wikimedia project: Wikipedia:Vital articles/Level/4

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Article · 中文

大陵五（/ˈælɡɒl/），也就是英仙座β（β Persei，縮寫為Beta Per、β Per），俗稱為惡魔之星，是英仙座中一顆明亮的聚星，也是最早被發現不是新星的變星之一。大陵五的三合星系統，包含大陵五Aa1、Aa2和Ab，其中最亮的是較熱也較大的主星Aa1，但是較冷也較黯淡的Aa2會規則的經過Aa1的前方，每次都會造成星食，使光度減弱而成為一對食聯星。因此，大陵五的視星等通常維持在2.1等，但是每2.87天中會規律的降至3.4等約10小時；而當較亮的星遮蔽較暗的星時，也會造成第二次星食，但非常的淺，只能以光電探測出來。大陵五是食聯星的代表，這一類型的變星就稱為大陵五型變星。

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大陵五

Wikidata facts

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