HR4840 is a variable hypergiant star in the constellation of Ursa Major.
HR4840 visual magnitude is 6.38. Because of its reltive faintness, HR4840 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 HR4840:
Celestial coordinates and finder chart of HR4840
HR4840 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR4840 are provided in the following table:
The simplified sky map below shows the position of HR4840 in the sky:
Visibility of HR4840 from your location
HR4840 is circumpolar and transits at 12:43 UTC (altitude: 80.3°)
Digitized Sky Survey image of HR4840
The image below is a photograph of HR4840 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 HR4840 is -0.047 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of HR4840 from the Sun and relative movement
HR4840 is distant 477.31 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.
Spectral properties of HR4840
HR4840 belongs to spectral class K0
The red dot in the diagram below shows where HR4840 is situated in the Hertzsprung–Russell diagram.