26_Ursae_Majoris
26 Ursae Majoris
Star in the constellation Ursa Major
26 Ursae Majoris is a single[9] star in the northern circumpolar constellation of Ursa Major, located 262 light years away from the Sun.[1] It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.47.[2] The object is moving further from the Earth with a heliocentric radial velocity of +22 km/s.[5]
This is an A-type main-sequence star with a stellar classification of A0 Vn,[3] where the 'n' indicates "nebulous" lines in the spectrum due to rapid rotation. It has a high rate of spin with a projected rotational velocity of 165 km/s,[3] which is giving it an oblate shape with an equatorial bulge that is 8% larger than the polar radius.[10] The star is 147[6] million years old with just over double[6] the mass of the Sun and twice[7] the Sun's radius. It is radiating 99[2] times the Sun's luminosity from its photosphere at an effective temperature of 9,757 K.[6]