The two stars are distinguishable by the naked eye, and both are themselves multiple stars. The primary (α 2 Cap), 109 light-years from Earth, is a yellow-hued giant star of magnitude 3.6 the secondary (α 1 Cap), 690 light-years from Earth, is a yellow-hued supergiant star of magnitude 4.3. The other bright stars in Capricornus range in magnitude from 3.1 to 5.1. It ranges by about 0.2 magnitudes with a period of 24.5 hours. Deneb Algedi is a Beta Lyrae variable star (a type of eclipsing binary). Like several other stars such as Denebola and Deneb, it is named for the Arabic word for "tail" ( deneb) its traditional name means "the tail of the goat". The brightest star in Capricornus is δ Capricorni, also called Deneb Algedi, with a magnitude of 2.9, located 39 light-years from Earth. It is the smallest constellation in the zodiac.Ĭapricornus is a faint constellation, with only one star above magnitude 3 its alpha star has a magnitude of only 3.6. The constellation is located in an area of sky called the Sea or the Water, consisting of many water-related constellations such as Aquarius, Pisces and Eridanus. Under its modern boundaries it is bordered by Aquila, Sagittarius, Microscopium, Piscis Austrinus, and Aquarius.
Its name is Latin for "horned goat" or "goat horn" or "having horns like a goat's", and it is commonly represented in the form of a sea goat: a mythical creature that is half goat, half fish.Ĭapricornus is one of the 88 modern constellations, and was also one of the 48 constellations listed by the 2nd century astronomer Claudius Ptolemy. Visible at latitudes between + 60° and − 90°.īest visible at 21:00 (9 p.m.) during the month of September.Ĭapricornus / ˌ k æ p r ɪ ˈ k ɔːr n ə s/ is one of the constellations of the zodiac.
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