With normal eyesight Alcor appears at about 12 minutes of arc from the second-magnitude star Mizar. Coordinates: 13h 25m 13.5s, +54° 59′ 17″, "High-Precision Near-Infrared Photometry of a Large Sample of Bright Stars Visible from the Northern Hemisphere", "Bulletin of the IAU Working Group on Star Names, No. Alcor was originally Arabic سها‎ Suhā/Sohā, meaning either the ‘forgotten’ or ‘neglected’ one; notable as a faintly perceptible companion of Mizar. If they are exactly the same distance from us (somewhat unlikely) then the distance between them is only 17800 AU (0.281 ly). In the Mi'kmaq myth of the great bear and the seven hunters,[18] Mizar is Chickadee and Alcor is his cooking pot. Another led by Neil Zimmerman, a graduate student at Columbia University and member of Project 1640, an international collaborative team that includes astrophysicists at the American Museum of Natural History, the University of Cambridge's Institute of Astronomy, the California Institute of Technology, and NASA's Jet Propulsion Laboratory, used the 5-meter Hale telescope at Palomar Observatory.[4]. They are nearly as well-known as the Dipper itself. Arabic: … With a relatively constant light curve interrupted by eclipse-induced drops in magnitude, UX UMa was orginally thought to be an Algol-type eclipsing variable.UX UMa's earliest claim to fame was its ultra-short orbital period of 0.1967 days, or 4.7 hours! Articolul 80 Ursae Majoris este un subiect de care se ocupă Proiectul Astronomie, o inițiativă de a construi o listă cuprinzătoare și detaliată cu informații despre astronomie Dacă doriți să participați la acest proiect, vă rugăm să vă înscrieți aici. Alcor is of magnitude 3.99 and spectral class A5V. Alcor, également désignée 80 Ursae Majoris dans la désignation de Flamsteed (et abrégé en 80 UMa), est une étoile binaire de la constellation de la Grande Ourse. D’Al Suha est né le prénom Sohan qui est une référence à l’étoile Mizar[réf. The image below is a photograph of Alcor from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. Alcor, (from Arabic: “Faint One”) also called 80 Ursae Majoris, star with apparent magnitude of 4.01. Revenir à la page « 80 Ursae Majoris ». [10], In 2016, the International Astronomical Union organized a Working Group on Star Names (WGSN)[11] to catalog and standardize proper names for stars. 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 the constellation of Ursa Major. UX Ursae Majoris was first discovered to be variable in 1933 by S. Beljawsky during his investigation of Simeiz Observatory plates. Arabarane nytta desse stjernene som ein prøve på godt syn. nécessaire]. C'est la compagne de Mizar (ζ UMa) ; les deux étoiles forment une paire séparable à l’œil nu située dans la poignée de l'astérisme de la Grande Casserole. Voir plus » Pays de Caux. Primary / Proper / Traditional Name: Alcor: Alternative Names: G Uma, G Ursae Majoris, G UMa, HD 116842, HIP 65477, HR 5062, TYC 3850-1384-1, 80 Ursae Majoris, 80 Uma, BD+55 1603, NSV 06238 Both are blue main sequence dwarf stars that are loosely bound to one another, despite being … Alcor B is one second of arc away from Alcor A. Find out information about 80 Ursae Majoris. Learn definitions, uses, and phrases with ursae. Looking for 80 Ursae Majoris? Arabic: "the bull" Ursa Major: Alkaid (Benetnasch) Eta Ursae Majoris. Alcor est facilement visible à l'œil nu avec sa magnitude apparente de +3,99. Le pays de Caux est une région naturelle de Normandie appartenant au Bassin parisien. Define 80 Ursae Majoris. 1", "Two Big Dipper constellation stars actually six", https://en.wikipedia.org/w/index.php?title=Alcor_(star)&oldid=1006139076, Creative Commons Attribution-ShareAlike License, This page was last edited on 11 February 2021, at 07:51. ζ Ursae Majoris, Mizar, the second star in from the end of the handle of the Big Dipper, and the constellation's fourth-brightest star. Jump to: General, Art, Business, Computing, Medicine, Miscellaneous, Religion, Science, Slang, Sports, Tech, Phrases We found one dictionary with English definitions that includes the word 80 ursae majoris: Click on the first link on a line below to go directly to a page where "80 ursae majoris" is defined. A white main-sequence dwarf that is one of the brighter stars of the Plough. The uncertainty is due to our uncertainty about the exact distances from us. It appears as الخوّار‎ al-Khawwar, 'the Faint One', [17]. Alcor - 80 Ursae Majoris is circumpolar and transits at 03:59 UTC (altitude: 86.5°). Une tradition non vérifiée voudrait qu'elle ait servi à tester l'acuité visuelle des archers de Charles Quint et de Gengis Khan. In the myth, seven hunters (birds) are hunting the bear. C'est la compagne de Mizar (ζ UMa) ; les deux étoiles forment une paire séparable à l’œil nu située dans … Alcor, également désignée 80 Ursae Majoris dans la désignation de Flamsteed (et abrégé en 80 UMa), est une étoile binaire de la constellation de la Grande Ourse. [2], In 2009, Alcor was discovered to have a companion star Alcor B, a magnitude 8.8 red dwarf. g Ursae Majoris, 80 Ursae Majoris, BD+55 1603, CCDM J13240+5456D, GC 18155, HD 116842, HIP 65477, HR 5062, PPM 34021, SAO 28751, WDS J13239+5456C Unitățile SI și condiții de temperatură și presiune normale dacă nu s-a specificat altfel. Explanation of 80 Ursae Majoris The two stars have been known since ancient times. The WGSN's first bulletin of July 2016[12] included a table of the first two batches of names approved by the WGSN; which included Alcor for 80 UMa.[13]. n. The binary star in the middle of the handle of the Big Dipper, in the constellation Ursa Major, approximately 78 light years from Earth. Alcor was originally Arabic سها‎ Suhā/Sohā, meaning either the ‘forgotten’ or ‘neglected’ one; notable as a faintly perceptible companion of Mizar. Treshchov Gateway (Surface port) 2. Also known as Eta Ursae Majoris, at a distance of around 80 light years from Earth Alioth is the brightest star in the constellation, it has surface temperatures twice … In traditional Indian astronomy,[16] Alcor was known as Arundhati, wife of one of the Saptarishi. Alkor (Alcor, Saidak) je zvezda v bližini Mizarja.Imenujemo jo tudi Jahač in 80 Velikega medveda (80 UMa, 80 Ursae Majoris).. Ima navidezni sij 4,02 m in sodi v spektralni razred A5 V. Spada me najbolj znane navidezne dvojne zvezde, čeprav še ni natančno znano ali res ne … [4] Its spectral type is M3-4 and it is a main sequence star, a red dwarf. Mizar A / B en bas et Alcor en haut. [15] The Mizar-Alcor stellar sextuple system belongs to the Ursa Major Moving Group, a stellar group of stars of similar ages and velocities,[2] and the closest cluster-like object to Earth. At the bend of the Big Dipper's handle is the striking pair of Zeta and 80 Ursae Majoris, or Mizar and Alcor. Alcor /ˈælkɔːr/[9] is a binary star system in the constellation of Ursa Major. Dernière modification le 14 août 2020, à 00:13. In Arabic Al-Sahja was the rhythmical form of the usual Suhā/Sohā. Son nom viendrait de l’arabe al-qur, « le cavalier » du fait qu'elle semble chevaucher un des chevaux du chariot de la Grande Ourse. [14], Alcor B was discovered independently by two groups. C'est la compagne de Mizar (ζ UMa) ; les deux étoiles forment une paire séparable à l’œil nu située dans la poignée de l'astérisme de la Grande Casserole. The two both lie about 83 light-years away from the Sun, as measured by the Hipparcos astrometry satellite. Alcor et Mizar sont distantes de 11,48 minute d'arc[2] soit environ un tiers du diamètre apparent de la pleine Lune. 80 Ursae Majoris. En effet, l'emplacement de certaines abbayes du pays de Caux est censé reproduire au sol le tracé de la Grande Ourse, et Alcor indiquerait le lieu où serait enfoui un hypothétique trésor des rois de France. Le contenu est disponible sous licence CC BY-SA 3.0 sauf mention contraire. Alcor itself is orbited by a faint red companion star. Alcor, 80 Ursae Majoris, g Ursae Majoris, HD 116842, GC 18155, HIP 65477, SAO 28751, PPM 34021, HR 5062, BD+55 1603, WDS J13239+5456C, CCDM J13240+5456D, GSC 03850-01384, GJ 3785, TYC 3850-1384-1, Gaia DR2 1565090003969283968, 2MASS J13251353+5459165 However, it has yet to be demonstrated conclusively that they are gravitationally bound. 80 Ursae Majoris synonyms, 80 Ursae Majoris pronunciation, 80 Ursae Majoris translation, English dictionary definition of 80 Ursae Majoris. 47 Ursae Majoris (en abrégé 47 UMa) ou Chalawan est une naine jaune très similaire (type spectral G1V) au Soleil et située à ∼45 a.l. 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. Centre de données astronomiques de Strasbourg, https://fr.wikipedia.org/w/index.php?title=80_Ursae_Majoris&oldid=178609389, Article contenant un appel à traduction en anglais, Portail:Sciences de la Terre et de l'Univers/Articles liés, licence Creative Commons attribution, partage dans les mêmes conditions, comment citer les auteurs et mentionner la licence. : Început: Acest articol a fost evaluat ca făcând parte din grupa Început pe scala de calitate. Alcor, également désignée 80 Ursae Majoris dans la désignation de Flamsteed (et abrégé en 80 UMa), est une étoile binaire de la constellation de la Grande Ourse. Alcor has the Flamsteed designation 80 Ursae Majoris. 47 Ursae Majoris (abbreviated 47 UMa), formally named Chalawan / ˈ tʃ ɑː l ə w ə n /, is a yellow dwarf star approximately 46 light-years from Earth in the constellation of Ursa Major.As of 2011, three extrasolar planets (designated 47 Ursae Majoris b, c and d; the first two later named Taphao Thong and Taphao Kaew) are believed to orbit the star. La plus ancienne notification de cette étoile vient de l'astronome persan Abd Al-Rahman Al Soufi dans son Livre des étoiles fixes établi en 964 à partir du catalogue de Ptolémée : Il est singulier que les anciens n'en aient pas dit un seul mot alors qu'elle est assez facilement visible à l'œil nu dans un ciel pur[3]. Alcor A and B are situated 1.2 light years away from, and are co-moving with, the Mizar quadruple system, making the system the second known stellar sextuplet—only Castor is closer. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). (∼13,8 pc) [1] dans la constellation de la Grande Ourse.Depuis 2002, on a découvert qu'elle possédait trois exoplanètes.Chalawan est 72 e dans le top 100 des étoiles cibles du programme Terrestrial Planet Finder de la NASA [4 unknown, possibly transliterated Arabic word : Ursa Major: Alcyone: Eta Tauri: Greek: a Pleaide, a daughter of Atlas and Pleione : Taurus: Aldebaran ... Epsilon Ursae Majoris. Alcor es el nombre de la estrella 80 Ursae Majoris (80 UMa / g Ursae Majoris / HD 116842) en la constelación de la Osa Mayor. Mizar, which means "girdle," forms a famous double star, with its optical companion Alcor (80 Ursae Majoris), the two of which were termed the "horse and rider" by the Arabs. Ursae is contained in 9 matches in Merriam-Webster Dictionary. Query : 80 Ursae Majoris : C.D.S. Größe im Sternbild Großer Bär.Er besitzt eine scheinbare Helligkeit von 4,0 m und liegt etwa 82 Lichtjahre von der Sonne entfernt. Recent studies indicate that Alcor and Mizar are somewhat closer together than previously thought: approximately 74,000 ± 39,000 AU or 0.5–1.5 light years. Mizar and Alcor's proper motions show they move together, along with most of the other stars of the Big Dipper except Dubhe and Alkaid, as members of the Ursa Major Moving Group, a mostly dispersed group of stars sharing a common birth. Digitized Sky Survey image of Alcor. Alcor et Mizar sont distantes de 11,48 minute d'arc soit environ un tiers du diamètre apparent de la pleine Lune. Alcor has the Flamsteed designation 80 Ursae Majoris. Alkor (Bayer-Bezeichnung: g Ursae Majoris, kurz: g UMa), umgangssprachlich das „Reiterlein“ (in Südwestdeutschland auch „Deichselreiter“) ist ein Stern 4. Un article de Wikipédia, l'encyclopédie libre. - SIMBAD4 rel 1.7 - 2021.01.11CET05:48:02 Available data : Basic data • Identifiers • Plot & images • Bibliography • Measurements • External archives • … Alcor makes a visual double with the brighter star Mizar in the middle of the handle of the Big Dipper ().The two are 1.2 light-years apart and may be gravitationally bound to each other. USS Alcor (AD-34) and USS Alcor (AK-259) are both United States Navy ships.