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public LocationGreenwich, UK
Sunrise: 5:07 
Transit: 13:06 
Sunset: 21:04
wb_twilight   (Astronomical Twilight)   What's Visible Now?
All Constellations » Auriga » 


Below the horizon.  Rise: 1:32 | Tran: 10:38 | Set: 19:43
Alt: -2.66°   Az: 29.83°   Direction: North-North-East

HR1804 is a supergiant star of spectral class B9 in the constellation of Auriga.

HR1804 visual magnitude is 5.74. Because of its faintness, HR1804 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.

Image of HR1804 star
DSS2 image of HR1804. The red arrow shows the motion of HR1804 during the next 10000 years (1.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Celestial Coordinates


05h 28m 42s
+30° 13’ 39”
14h 20m 24s
19h 49m 07s


05h 27m 08s
+30° 12’ 30”

Galactic Coordinates


Finder Chart

Finder chart HR1804 star
Simplified finder chart for HR1804.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where HR1804 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1804. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR1804 is distant 2,312.06 light years from the Sun and it is moving far from the Sun at the speed of 17 kilometers per second.

17 km/s
0.008 arcsec/y

Alternative Designations


Visibility from Your Location

Today's HR1804 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 59.8°
Max altitude: 68.7°
Azimuth: 300.2°