Mizar and Alcor - Wikipedia
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. Their magnitudes are 2.2 and 3.9, and the pair can easily be seen 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 ...
Mizar and Alcor in the bend of the Big Dipper - EarthSky
2024年2月11日 · Located in the handle of the Big Dipper, Mizar (brighter at right center) and Alcor (fainter and centered) make up one of the most famous visual double stars in the sky.
Meet Mizar and Alcor: The Horse and Rider - Sky & Telescope
2022年1月27日 · Mizar and Alcor are sometimes known as the “Horse and Rider,” with the brighter Mizar representing the horse and the dimmer Alcor acting as the “rider” on its back. It’s a fine analogy and a nice mental image that goes back to ancient Arabic astronomers, who also regarded the ability to see the fainter Alcor as a test for good vision.
Mizar - Wikipedia
Mizar / ˈ m aɪ z ɑːr / [15] is a second-magnitude star in the handle of the Big Dipper asterism in the constellation of Ursa Major. It has the Bayer designation ζ Ursae Majoris (Latinised as Zeta Ursae Majoris). It forms a well-known naked eye double star with the fainter star Alcor, and is itself a quadruple star system.
Star Facts: Mizar and Alcor - Star Types, Size, & Location
2017年9月7日 · Mizar (Zeta Ursae Majoris) and Alcor (80 Ursae Majoris) form a true binary that can be seen without optical aid as a stellar pair in the handle of the Big Dipper asterism of Ursa Major. Both are blue main sequence dwarf stars that are loosely bound to one another, despite being separated by a hefty one light year distance.
Alcor (star) - Wikipedia
Alcor (/ ˈ æ l k ɔːr /) [9] is a binary star system in the constellation of Ursa Major. It is the fainter companion of Mizar, the two stars forming a naked eye double in the handle of the Big Dipper (or Plough) asterism in Ursa Major. The two lie about 83 light-years away from the Sun, as measured by the Hipparcos astrometry satellite.
Mizar and Alcor: the Plough's famous double star
Four of the brightest stars in the constellation of Ursa Major, the Great Bear, form a distinctive ‘bowl’ or ‘blade’, while three more make a curving handle.
Mizar and Alcor: The Great Bear’s famous naked-eye double
2023年5月9日 · Mizar and Alcor. Image: Greg Parker. Not only of surpassing interest historically, zeta Ursae Majoris (UMa), or Mizar, the middle star in Ursa Major’s famous Plough asterism, is also one of the finest double stars in the sky for a small telescope.
Alcor - Stellar Astronomy
Alcor, formally designated as 80 Ursae Majoris, is a small star that appears to be closely following Mizar (ζ Ursae Majoris). While they appear as a single point of light to the naked eye, Alcor actually orbits Mizar at a distance of roughly 18,000 AU (astronomical units).
Shallow Sky Object of the Month: Mizar and Alcor
Object: Mizar and Alcor RA: 13 h, 23 m, 56 s Distance: 83 ly Class: A double (and triple) star Constellation: Ursa Major Magnitude: 2.2 Size/Spectral: with Alcor — 11.8’; close double with Mizar at 14.4” Optics needed: This is an easy but very nice double (triple) star group that is a showpiece in small telescopes. Why this is interesting:
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