Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:04  
clear_day Transit: 12:47  
SunsetSet: 18:30 south
sunny DaytimeWhat's Visible Now
All Constellations » Ursa Major » 


Altitude: 83.1°   Azimuth: 231.2°   Direction: South-West

HR3797 is a hypergiant star in the constellation of Ursa Major.

HR3797 visual magnitude is 6.52. Because of its reltive faintness, HR3797 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 HR3797:


HR3797 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 83.1°
Azimuth: 231.2°
Direction: South-West

Celestial coordinates and finder chart of HR3797

HR3797 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 HR3797 are provided in the following table:

09h 34m 19s
+46° 54’ 07”
Ursa Major

The simplified sky map below shows the position of HR3797 in the sky:

Finder chart HR3797 star
Simplified finder chart for HR3797.

Visibility of HR3797 from your location

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

HR3797 is circumpolar and transits at 08:43 UTC (altitude: 85.4°)

Digitized Sky Survey image of HR3797

The image below is a photograph of HR3797 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 HR3797 is -0.062 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3797 star
DSS2 image of HR3797. The red arrow shows the motion of HR3797 during the next 10000 years (-10.33 arcmin in Right Ascension and -1.33 arcmin in declination);

Distance of HR3797 from the Sun and relative movement

HR3797 is distant 307.55 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

94.34 pc
307.55 ly
11 km/s
-0.062 arcsec/year
-0.008 arcsec/year

Spectral properties of HR3797

HR3797 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3797 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3797. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3797