HR20 is a double sub-giant star in the constellation of Cepheus.
HR20 visual magnitude is 6.01. Because of its reltive faintness, HR20 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 HR20:
Celestial coordinates and finder chart of HR20
HR20 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 HR20 are provided in the following table:
The simplified sky map below shows the position of HR20 in the sky:
Visibility of HR20 from your location
HR20 is circumpolar and transits at 23:22 UTC (altitude: 61.8°)
Digitized Sky Survey image of HR20
The image below is a photograph of HR20 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 HR20 is 0.102 arcsec per year in Right Ascension and -0.027 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of HR20 from the Sun and relative movement
HR20 is distant 380.84 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.
Spectral properties of HR20
HR20 belongs to spectral class A7 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where HR20 is situated in the Hertzsprung–Russell diagram.
HR20 star system properties
HR20 is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the HR20 double sysyem: