What is Delta Canis Majoris?
{{Starbox begin | name=δ Canis Majoris }} {{Starbox image | image= {{Location mark |image=Canis Major constellation map.svg|alt=|float=center|width=240 |label=|position=right |mark=Red circle.svg|mark_width=12|mark_link=δ CMa |x=192|y=740 }} |caption=Location of δ Canis Majoris (circled) }} {{Starbox observe | epoch = J2000 | ra = {{RA|07|08|23.48608}} | dec = {{DEC|−26|23|35.5474}} | appmag_v = 1.824 | constell = [[Canis Major]] }} {{Starbox character | class = F8Ia }} {{Starbox astrometry |dist_ly=1600 }} {{Starbox detail | mass= 12 | radius=215 | luminosity=82,000 | temperature = 6,390 | gravity = 1.14 | metal_fe = 0.24 | rotational_velocity=25 | age_myr=12 }} {{Starbox catalog | names=Wezen, Wesen, Wezea, Alwazn, Al Wazor, [[Flamsteed designation|25]]&nbsp;Canis Majoris, [[Bonner Durchmusterung|CD]]−263916, [[Fifth Fundamental Catalogue|FK5]]&nbsp;273, [[Henry Draper catalogue|HD]]&nbsp;54605, [[Hipparcos catalogue|HIP]]&nbsp;34444, [[Harvard Revised catalogue|HR]]&nbsp;2693, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]]&nbsp;173047. }} {{Starbox end }} '''Delta Canis Majoris''' is a [[star]] in the [[constellation]] of [[Canis Major]]. It is a [[Stellar classification|yellow-white F-type supergiant]] with an [[apparent magnitude]] of +1.83. Since 1943, the [[spectrum]] of this star has been one of the stable anchor points by which other stars are classified. == Properties == Delta Canis Majoris is a supergiant of class F8 with a radius around 215 times that of the Sun. Its surface temperature is 5,818 K, and it is 12 times more massive than the Sun. Its absolute magnitude is −6.87, and it is 1,600 light-years away. It is rotating at a speed of around 28 km/s, and so may take a year to rotate fully. Only around 10 million years old, Delta Canis Majoris has stopped fusing hydrogen in its core, Its outer envelope is beginning to expand and cool, and in the next 100,000 years it will become a red supergiant as its core fuses heavier and heavier elements, Once it has an iron co