What is Alkaid?
{{Starbox begin | name=η Ursae Majoris }} {{Starbox image | image={{Location map|100x100 |AlternativeMap=Ursa Major constellation map.svg |caption= |width=250 |lat=49.5 |long=10 |mark=Cercle rouge 100%.svg | marksize=12 |float=center }}| caption=Alkaid in the Big Dipper of Ursa Major. }} {{Starbox observe | epoch = J2000 | ra = {{RA|13|47|32.43776}}<ref name=aaa474_2_653/> | dec = {{DEC|+49|18|47.7602}}<ref name=aaa474_2_653/> | appmag_v = +1.86<ref name=ducati>{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|last1=Ducati|first1=J. R.|year=2002}}</ref> | constell = [[Ursa Major]] }} {{Starbox character | class = B3&nbsp;V<ref name=araa11_29/> | b-v = –0.19<ref name=ducati/> | u-b = –0.68<ref name=ducati/> | variable = }} {{Starbox astrometry | radial_v = –10.9<ref name=scfs/> | prop_mo_ra = –121.17<ref name=aaa474_2_653/> | prop_mo_dec = –14.91<ref name=aaa474_2_653/> | parallax = 31.38 | p_error = 0.24 | parallax_footnote = <ref name=aaa474_2_653/> | absmag_v = −0.67<ref name=Anderson2012/> }} {{Starbox detail | mass = {{nowrap|6.1 ± 0.1}}<ref name=mnras410_1_190/> | radius = 3.4<ref name=mnras189_601/> | metal_fe = | age_myr = {{nowrap|10.0 ± 2.6}}<ref name=mnras410_1_190/> | gravity = 3.78<ref name=aj155_30/> | luminosity = 594 ± 31<ref name=aj155_30/> | temperature = {{nowrap|15,540 ± 1157}}<ref name=aj155_30/> | rotational_velocity = 150<ref name=apj573_1_359/> }} {{Starbox catalog | names = Alkaid, Benetnash, Benetnasch,<ref name=rumrill>{{cite journal|bibcode=1936PASP...48..139R|title=Star Name Pronunciation|journal=Publications of the Astronomical Society of the Pacific|volume=48|issue=283|pages=139|last1=Rumrill|first1=H. B.|year=1936|doi=10.1086/124681|s2cid=120743052 }}</ref> Elkeid, [[Bayer designation|η]] UMa, [[Flamsteed designation|85]] UMa, [[Bonner Durchmusterung|BD]]+50°202