HR7166 is a variable and double sub-giant star in the constellation of Sagittarius.
HR7166 visual magnitude is 5.53. Because of its reltive faintness, HR7166 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 HR7166:
Celestial coordinates and finder chart of HR7166
HR7166 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR7166 are provided in the following table:
The simplified sky map below shows the position of HR7166 in the sky:
Visibility of HR7166 from your location
Digitized Sky Survey image of HR7166
The image below is a photograph of HR7166 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 HR7166 is 0.002 arcsec per year in Right Ascension and -0.018 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of HR7166 from the Sun and relative movement
HR7166 is distant 514.20 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.
Spectral properties of HR7166
HR7166 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 HR7166 is situated in the Hertzsprung–Russell diagram.
HR7166 star system properties
HR7166 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 HR7166 double sysyem: