HR7798
HR7798 is a variable hypergiant star in the constellation of Cygnus.
HR7798 visual magnitude is 5.58. Because of its reltive faintness, HR7798 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 HR7798:
Celestial coordinates and finder chart of HR7798
HR7798 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 HR7798 are provided in the following table:
The simplified sky map below shows the position of HR7798 in the sky:
Visibility of HR7798 from your location
Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London
HR7798 is circumpolar and transits at 01:22 UTC (altitude: 84.3°)
Digitized Sky Survey image of HR7798
The image below is a photograph of HR7798 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 HR7798 is 0.028 arcsec per year in Right Ascension and 0.044 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of HR7798 from the Sun and relative movement
HR7798 is distant 414.76 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.
Spectral properties of HR7798
HR7798 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.
The red dot in the diagram below shows where HR7798 is situated in the Hertzsprung–Russell diagram.
