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public LocationGreenwich, UK
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
sunny   (Daytime)   What's Visible Now?
All Constellations » Cetus » 


Above the horizon.  Rise: 2:01 | Tran: 6:55 | Set: 11:48
Altitude: 9.3°   Azimuth: 236.0°   Direction: South-West

HR31 is a hypergiant star of spectral class K0 in the constellation of Cetus.

HR31 visual magnitude is 5.85. Because of its faintness, HR31 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 HR31

Finder chart HR31 star
Simplified finder chart for HR31.

HR31 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 HR31 are provided in the following table:

00h 10m 42s
-12° 34’ 48”
Image of HR31 star
DSS2 image of HR31. The red arrow shows the motion of HR31 during the next 1000 years (2.50 arcmin in Right Ascension and -0.63 arcmin in declination);

Key facts about HR31


and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR31 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR31. Attribution: Richard Powell / CC BY-SA

Distance of HR31 from the Sun and relative movement

HR31 is distant 212.38 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

65.15 pc
212.38 ly
6 km/s
0.15 arcsec/year
-0.038 arcsec/year

Alternative designations of HR31


Visibility of HR31 from your location

Today's HR31 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 102.6°
Max altitude: 25.9°
Azimuth: 257.4°