Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:01  ☀️ Transit: 12:06  🌅 Sunset: 18:11


HR1904 is a hypergiant star in the constellation of Auriga.

HR1904 visual magnitude is 6.33. Because of its reltive faintness, HR1904 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 HR1904:

HR1904 is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of HR1904

HR1904 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR1904 are provided in the following table:

05h 37m 45s
+33° 33’ 33”

The simplified sky map below shows the position of HR1904 in the sky:

Finder chart HR1904 star
Simplified finder chart for HR1904.

Visibility of HR1904 from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's HR1904 rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 56.4°
Max altitude: 72.1°
Azimuth: 303.6°
HR1904 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR1904

The image below is a photograph of HR1904 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 HR1904 is 0.003 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1904 star
DSS2 image of HR1904. The red arrow shows the motion of HR1904 during the next 100000 years (5.00 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of HR1904 from the Sun and relative movement

HR1904 is distant 498.47 light years from the Sun and it is moving far from the Sun at the speed of 29 kilometers per second.

152.91 pc
498.47 ly
29 km/s
0.003 arcsec/year

Spectral properties of HR1904

HR1904 belongs to spectral class K0


The red dot in the diagram below shows where HR1904 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR1904. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1904