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Encyclopedia > Theta Arietis
θ Arietis
Epoch J2000.0
Constellation Aries
Right ascension 02h 18m 07.5s
Declination +19° 54' 04"
Distance 387 ± 39 ly (119 ± 12 pc)
Spectral type A1Vn
Apparent magnitude +5.58
Other designations
22 Arietis, HR 669,
HD 14191, BD+19°340,
FK5 81, HIP 10732,
SAO 92877, GC 2767

Theta Arietis (θ Ari / θ Arietis) is a star in the constellation Aries. In astronomy, an epoch is a moment in time for which celestial coordinates or orbital elements are specified. ... The J2000. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... Aries ( , Latin for Ram) is one of the constellations of the zodiac. ... Right ascension (RA; symbol α: Greek letter alpha) is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. ... In astronomy, declination (dec) is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... The parsec (symbol pc) is a unit of length used in astronomy. ... In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequenly refined in terms of other characteristics. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Henry Draper Catalogue is an astronomy catalogue with astrometric and spectroscopic data about more than 225,000 stars. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... In astronomy, many stars are referred to simply by catalogue numbers. ... The Pleiades star cluster A star is a massive body of plasma in outer space that is currently producing or has produced energy through nuclear fusion. ... Orion is a remarkable constellation, visible from most places on the globe (but not always the whole year long). ... Aries ( , Latin for Ram) is one of the constellations of the zodiac. ...


Theta Arietis is a white A-type main sequence dwarf with an apparent magnitude of +5.58. It is approximately 387 light years from Earth. In astronomy, stellar classification is a classification of stars based initially on photospheric temperature and its associated spectral characteristics, and subsequently refined in terms of other characteristics. ... Hertzsprung-Russell diagram The main sequence of the Hertzsprung-Russell diagram is the curve where the majority of stars are located in this diagram. ... The apparent magnitude (m) of a star, planet or other heavenly body is a measure of its apparent brightness; that is, the amount of light received from the object. ... A light year, abbreviated ly, is the distance light travels in one year: roughly 9. ... Earth, also known as Terra, and (mostly in the 19th century) Tellus, is the third-closest planet to the Sun. ...


  Results from FactBites:
 
Aries - Encyclopedia, History, Geography and Biography (560 words)
The ram's head consists of the stars alpha Arietis, lambda Arietis, and beta Arietis: alpha Arietis being of the second magnitude and beta Arietis of the third magnitude.
The ram's body consists of the stars alpha Arietis, eta Arietis, epsilon Arietis, 41 Arietis, and 35 Arietis: epsilon Arietis and 41 Arietis being of the fourth magnitude.
The star gamma Arietis, of fourth magnitude, represents the ram's front foot, and the star delta Arietis, also of fourth magnitude, represents the ram's hind foot.
The Brightest Stars (4673 words)
Alpha Arietis Hamal 02 07 +23.5 144.5 -36.2 K2III 2.01 0.48 49.48 0.99 66 51.
Theta Ursae Majoris Al Haud 09 33 +51.7 165.5 +45.7 F6IV 3.17 2.52 74.15 0.74 44 203.
Theta Pegasi Baham 22 10 +06.2 67.4 -38.7 A2V 3.52 1.16 33.77 0.85 97 296.
  More results at FactBites »

 
 

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