HR3939 is a giant star in the constellation of Ursa Major.
HR3939 visual magnitude is 5.48. Because of its reltive faintness, HR3939 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 HR3939:
Celestial coordinates and finder chart of HR3939
HR3939 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 HR3939 are provided in the following table:
The simplified sky map below shows the position of HR3939 in the sky:
Visibility of HR3939 from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
HR3939 is circumpolar and transits at 21:59 UTC (altitude: 84.7°)
Digitized Sky Survey image of HR3939
The image below is a photograph of HR3939 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 HR3939 is -0.029 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 HR3939 from the Sun and relative movement
HR3939 is distant 510.17 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.
Spectral properties of HR3939
HR3939 belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where HR3939 is situated in the Hertzsprung–Russell diagram.