Mizar and Alcor are two stars forming a naked eye double in the handle of the Big Dipper (or Plough) asterism in the constellation of Ursa Major. Mizar consists of two stars with magnitudes 2.2 and 3.9 that can be seen easily without the aid of a telescope. Mizar's star is not a double star, but a four-star binary system located in the constellation Ursa Major (also known as the Big Dipper). This system consists of two pairs of double stars that are gravitationally bound to each other. Mizar is the second star from the end of the Big Dipper's handle, and Alcor its fainter companion. The traditional name Mizar derives from the Arabic المئزر miʼzar meaning 'apron; wrapper, covering, cover'.
Alcor was originally Arabic سها Suhā/Sohā, meaning either the ‘forgotten’ or ‘neglected’ one; notable as a faintly perceptible companion of Mizar.
Mizar, also designated Zeta Ursae Majoris (ζ Ursae Majoris, abbreviated Zeta UMa, ζ UMa), is itself a quadruple system and Alcor, also designated 80 Ursae Majoris (80 UMa), is a binary, the pair together forming a sextuple system. In fact, it was the first known binary star system, discovered by Italian astronomer Giovanni Battista Riccioli in 1650.[dubious – discuss] The whole system lies about 83 light-years away from the Sun, as measured by the Hipparcos astrometry satellite.[1][2][3]
^van Leeuwen, F. (November 2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
^Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; Van Leeuwen, F.; Van Der Marel, H.; Mignard, F.; Murray, C. A.; Le Poole, R. S.; Schrijver, H.; Turon, C.; Arenou, F.; Froeschlé, M.; Petersen, C. S. (1997). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323: L49. Bibcode:1997A&A...323L..49P.
^Perryman, Michael (2010). The Making of History's Greatest Star Map. Astronomers’ Universe. Heidelberg: Springer-Verlag. Bibcode:2010mhgs.book.....P. doi:10.1007/978-3-642-11602-5. ISBN 978-3-642-11601-8.
MizarandAlcor are two stars forming a naked eye double in the handle of the Big Dipper (or Plough) asterism in the constellation of Ursa Major. Mizar...
naked eye double star with the fainter star Alcor, and is itself a quadruple star system. The MizarandAlcor system lies about 83 light-years away from...
Alcor may refer to: Alcor (star), also known as 80 Ursae Majoris, a star in Ursa Major very close to MizarAlcor Life Extension Foundation Alcor sailplane...
eye is the case of MizarandAlcor (though actually a multiple-star system), but it is not known for certain whether MizarandAlcor are gravitationally...
Mizar, but about one light-year beyond it, is the star Alcor (80 UMa). Together they are known as the "Horse and Rider". At fourth magnitude, Alcor would...
halfway between MizarandAlcor. It was discovered on 2 December 1722 by Johann Georg Liebknecht, who mistook it for a planet and named it after Louis...
Algedi). They are separated by 0.11° on the sky, and resolvable with the naked eye, similar to MizarandAlcor. α¹ Capricorni is fainter (apparent magnitude...
11° of the sky, a gap just resolvable with the naked eye, similar to MizarandAlcor. Based on parallax shift as refined from orbits around the Sun of the...
0.11° of the sky, a gap resolvable with the naked eye, similar to MizarandAlcor. Both are not to be confused with much fainter 3 Capricorni nor somewhat...
constellation of Ursa Major. Mizar is the second star from the end of the Big Dipper's handle, andAlcor its faint companion. Alcor is recognized as Arundhadi...
halfway between MizarandAlcor. It was discovered on 2 December 1722 by Johann Georg Liebknecht, who mistook it for a planet and named it after Louis...
Smyth and Luigi Warren) the first European cryonics organization, Mizar Limited (later Alcor UK). In 1987, More moved to Los Angeles from Oxford University...
Asahi on October 11, 1986, and continued on until April 1, 1989. It was directed first by Kōzō Morishita (episodes 1–73) and then by Kazuhito Kikuchi (74–114)...
original and mis-assigned to the similarly named Alcor, the naked-eye binary companion of Mizar. Alioth is the brightest star of Ursa Major and the 33rd-brightest...
named as: Vasishtha is accompanied by Arundhati, a faint companion star (Alcor/80 Ursa Majoris). The valid avatar's clan is supposed to be named after...
Original shot: lower edge Alkaid, right of center the double star Mizar with Alcorand right edge Alioth; the Pinwheel Galaxy is a small diffuse dot in...
"Luxonorité"; Ittetsu Shimizu, "Suspiria de Profundis"; Carlos Satué, "Mizar-Alcor". Luxembourg Sinfonietta, Conductor: Marcel Wengler. CD LGNM No 402....
in the telescope and thought he observed relative motion (proper motion) to the neighbouring stars of the Big Dipper, MizarandAlcor. He called the supposed...
Horse and Rider may refer to: Horse and Rider (asterism), an informal name given to the stars MizarandAlcor Horse & Rider, a monthly magazine in the...
death, it was revealed he always knew about his twin brother, Alcor Zeta Bud, and both he and his parents always regretted having abandoned him, but were...
photographs of the moon and he was the first to produce images of stars other than the sun. Among those was the star Vega and the Mizar-Alcor stellar sextuple...
the constellation Ursa Major. It was discovered by Pierre Méchain in 1781 and was communicated that year to Charles Messier, who verified its position...
78+533859.5 Beta Tucanae Castor HD 139691 TYC 7037-89-1 If Alcor is considered part of the Mizar system, the system can be considered a sextuple. Jabbah...
g Pseudostenophylax adlimitans (Martynov, 1914) i c g Pseudostenophylax alcor Schmid, 1991 i c g Pseudostenophylax amphion Schmid, 1991 i c g Pseudostenophylax...
somewhat hotter, brighter and larger. Phecda is located in relatively close physical proximity to the prominent Mizar–Alcor star system. The two are separated...
Global Information