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public LocationGreenwich, UK
Sunrise: 5:00 
Transit: 13:04 
Sunset: 21:07
wb_twilight   (Civil Twilight)   What's Visible Now?
All Constellations » Hydra » 


Below the horizon.  Rise: 9:44 | Tran: 14:58 | Set: 20:12
Alt: -14.54°   Az: 274.43°   Direction: West

HR3801 is a hypergiant star of spectral class K0 in the constellation of Hydra.

HR3801 visual magnitude is 6.12. Because of its faintness, HR3801 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.

HR3801 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year.

Image of HR3801 star
DSS2 image of HR3801. The red arrow shows the motion of HR3801 during the next 10000 years (-3.33 arcmin in Right Ascension and -5.67 arcmin in declination);

Celestial Coordinates


09h 34m 14s
-08° 36’ 53”
06h 50m 11s
16h 24m 26s


09h 33m 02s
-08° 30’ 19”

Galactic Coordinates


Finder Chart

Finder chart HR3801 star
Simplified finder chart for HR3801.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where HR3801 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3801. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR3801 is distant 392.77 light years from the Sun and it is moving far from the Sun at the speed of 36 kilometers per second.

120.48 pc
392.77 ly
36 km/s
-0.02 arcsec/y
-0.034 "/y

Alternative Designations


Visibility from Your Location

Today's HR3801 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 98.6°
Max altitude: 29.9°
Azimuth: 261.4°