Epsilon Arietis
Encyclopedia
Epsilon Arietis (ε Ari, ε Arietis) is a double star
in the constellation
Aries
. It is approximately 293 light years
from Earth
.
The two components are both white A-type
main sequence dwarfs
with apparent magnitude
s of 5.2 and 5.5 respectively. They are separated by 1.5 arcseconds on the sky. The combined apparent magnitude of the system is +4.63.
, π Ari
, and ρ3 Ari, were Al Bīrūnī's Al Buṭain (ألبطين), the dual of Al Baṭn, the Belly. According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Buṭain were the title for five stars :δ Ari as Botein, π Ari
as Al Buṭain I, ρ3 Ari as Al Buṭain II, ε Ari as Al Buṭain III dan ζ Ari
as Al Buṭain IV
Double star
In observational astronomy, a double star is a pair of stars that appear close to each other in the sky as seen from Earth when viewed through an optical telescope. This can happen either because the pair forms a binary star, i.e...
in the constellation
Constellation
In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....
Aries
Aries (constellation)
Aries is one of the constellations of the zodiac, located between Pisces to the west and Taurus to the east. Its name is Latin for ram, and its symbol is , representing a ram's horns...
. It is approximately 293 light years
Light Years
Light Years is the seventh studio album by Australian recording artist Kylie Minogue. It was released on 25 September 2000 by Parlophone and Mushroom Records. The album's style was indicative of her return to "mainstream pop dance tunes"....
from Earth
Earth
Earth is the third planet from the Sun, and the densest and fifth-largest of the eight planets in the Solar System. It is also the largest of the Solar System's four terrestrial planets...
.
The two components are both white A-type
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
main sequence dwarfs
Main sequence
The main sequence is a continuous and distinctive band of stars that appears on plots of stellar color versus brightness. These color-magnitude plots are known as Hertzsprung–Russell diagrams after their co-developers, Ejnar Hertzsprung and Henry Norris Russell...
with apparent magnitude
Apparent magnitude
The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere...
s of 5.2 and 5.5 respectively. They are separated by 1.5 arcseconds on the sky. The combined apparent magnitude of the system is +4.63.
Name
This star, along with δ Ari, ζ AriZeta Arietis
Zeta Arietis is a star in the constellation Aries.Zeta Arietis is a white A-type main sequence dwarf with an apparent magnitude of +4.87. It is approximately 340 light years from Earth.-Name:...
, π Ari
Pi Arietis
Pi Arietis is a spectroscopic binary star system in the constellation Aries. It is approximately 603 light years from Earth....
, and ρ3 Ari, were Al Bīrūnī's Al Buṭain (ألبطين), the dual of Al Baṭn, the Belly. According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al Buṭain were the title for five stars :δ Ari as Botein, π Ari
Pi Arietis
Pi Arietis is a spectroscopic binary star system in the constellation Aries. It is approximately 603 light years from Earth....
as Al Buṭain I, ρ3 Ari as Al Buṭain II, ε Ari as Al Buṭain III dan ζ Ari
Zeta Arietis
Zeta Arietis is a star in the constellation Aries.Zeta Arietis is a white A-type main sequence dwarf with an apparent magnitude of +4.87. It is approximately 340 light years from Earth.-Name:...
as Al Buṭain IV