81 Ursae Majoris
81 Ursae Majoris is a variable hypergiant star in the constellation of Ursa Major.
81 Ursae Majoris visual magnitude is 5.6. Because of its reltive faintness, 81 Ursae Majoris should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.
The table below summarizes the key facts about 81 Ursae Majoris:
Celestial coordinates and finder chart of 81 Ursae Majoris
81 Ursae Majoris is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 81 Ursae Majoris are provided in the following table:
The simplified sky map below shows the position of 81 Ursae Majoris in the sky:
Visibility of 81 Ursae Majoris from your location
81 Ursae Majoris is circumpolar and transits at 09:02 UTC (altitude: 86.1°)
Digitized Sky Survey image of 81 Ursae Majoris
The image below is a photograph of 81 Ursae Majoris from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 81 Ursae Majoris is -0.022 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of 81 Ursae Majoris from the Sun and relative movement
81 Ursae Majoris is distant 276.98 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.
Spectral properties of 81 Ursae Majoris
81 Ursae Majoris belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.
The red dot in the diagram below shows where 81 Ursae Majoris is situated in the Hertzsprung–Russell diagram.