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Arcturus is the brightest star in the northern constellation of Boötes. With an apparent visual magnitude of −0.05, [2] it is the fourth-brightest star in the night sky, and the brightest in the northern celestial hemisphere. The name Arcturus originated from ancient Greece; it was then cataloged as α Boötis by Johann Bayer in 1603, which ...
The Sun is the brightest star as viewed from Earth, at −26.78 mag. The second brightest is Sirius at −1.46 mag. For comparison, the brightest non-stellar objects in the Solar System have maximum brightnesses of: the Moon −12.7 mag [ 1 ] Venus −4.92 mag. Jupiter −2.94 mag. Mars −2.94 mag.
31 Lyncis. 31 Lyncis is the fourth-brightest star in the constellation of Lynx. It has the traditional name Alsciaukat, pronounced / ælʃiˈɔːkæt /. [10] The orange-hued star is visible to the naked eye with a baseline apparent visual magnitude of +4.25. [3] It is a single [11] star located about 380 light years away from the Sun, based on ...
Located 36.7 light-years from Earth, Arcturus, or Alpha Boötis, is the brightest star in Boötes and the fourth-brightest star in the sky at an apparent magnitude of −0.05; [23] It is also the brightest star north of the celestial equator, just shading out Vega and Capella. [13] [24] Its name comes from the Greek for "bear-keeper".
Betelgeuse is the brightest near-infrared source in the sky with a J band magnitude of −2.99; [95] only about 13% of the star's radiant energy is emitted as visible light. If human eyes were sensitive to radiation at all wavelengths, Betelgeuse would appear as the brightest star in the night sky.
data. Beta Lacertae (Beta Lac, β Lacertae, β Lac) is the fourth-brightest star in the constellation of Lacerta. Based upon an annual parallax shift of 19.19 mas, [1] it is 170 light-years distant from Earth. At that distance, the visual magnitude is diminished by an extinction factor of 0.17 due to interstellar dust. [5]
Eta Ceti (η Cet, η Ceti) is a star in the equatorial constellation of Cetus. It has the traditional name Deneb Algenubi or Algenudi. The apparent visual magnitude of this star is +3.4, [2] making it the fourth-brightest star in this otherwise relatively faint constellation. The distance to this star can be measured directly using the parallax ...
As a fourth-magnitude star, Eta Carinae is comfortably visible to the naked eye in all but the most light-polluted skies in inner-city areas according to the Bortle scale. [46] Its brightness has varied over a wide range, from the second-brightest star in the sky for a few days in the 19th century, to well below naked-eye visibility.