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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 12:58 
Sunset: 21:15
sunny   (Daytime)   What's Visible Now?


Below the horizon.  Rise: 21:32 | Tran: 2:28 | Set: 7:19
Altitude: -48.9°   Azimuth: 334.0°   Direction: North-North-West

HR7166 is a variable and double sub-giant star of spectral class B5 in the constellation of Sagittarius.

HR7166 visual magnitude is 5.53. Because of its faintness, HR7166 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Celestial coordinates and finder chart of HR7166

Finder chart HR7166 star
Simplified finder chart for 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:

18h 59m 23s
-12° 50’ 26”
Image of HR7166 star
DSS2 image of HR7166. The red arrow shows the motion of HR7166 during the next 10000 years (0.33 arcmin in Right Ascension and -3.00 arcmin in declination);

Key facts about HR7166


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.

HR Diagram
H-R diagram showing the position of HR7166. Attribution: Richard Powell / CC BY-SA

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:

0.4 arcsec

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.

157.73 pc
514.20 ly
-13 km/s
0.002 arcsec/year
-0.018 arcsec/year

Alternative designations of HR7166


Visibility of HR7166 from your location

Today's HR7166 rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.8°
Max altitude: 25.7°
Azimuth: 257.2°