HR91 is a variable and double sub-giant star in the constellation of Cassiopeia.
HR91 visual magnitude is 5.57. Because of its reltive faintness, HR91 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 HR91:
Celestial coordinates and finder chart of HR91
HR91 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 HR91 are provided in the following table:
The simplified sky map below shows the position of HR91 in the sky:
Visibility of HR91 from your location
HR91 is circumpolar and transits at 15:14 UTC (altitude: 89.5°)
Digitized Sky Survey image of HR91
The image below is a photograph of HR91 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 HR91 is 0.013 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of HR91 from the Sun and relative movement
HR91 is distant 1,369.75 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.
Spectral properties of HR91
HR91 belongs to spectral class B5 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where HR91 is situated in the Hertzsprung–Russell diagram.
HR91 star system properties
HR91 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR91 double sysyem: