Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23


HR4051 is a main-sequence star in the constellation of Ursa Major.

HR4051 visual magnitude is 6.45. Because of its reltive faintness, HR4051 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 HR4051:

HR4051 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 83°.

Celestial coordinates and finder chart of HR4051

HR4051 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 HR4051 are provided in the following table:

10h 20m 14s
+53° 46’ 45”
Ursa Major

The simplified sky map below shows the position of HR4051 in the sky:

Finder chart HR4051 star
Simplified finder chart for HR4051.

Visibility of HR4051 from your location

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

HR4051 is circumpolar and transits at 21:56 UTC (altitude: 87.7°)

Digitized Sky Survey image of HR4051

The image below is a photograph of HR4051 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 HR4051 is -0.084 arcsec per year in Right Ascension and 0.046 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR4051 star
DSS2 image of HR4051. The red arrow shows the motion of HR4051 during the next 10000 years (-14.00 arcmin in Right Ascension and 7.67 arcmin in declination);

Distance of HR4051 from the Sun and relative movement

HR4051 is distant 99.69 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

30.58 pc
99.69 ly
-21 km/s
-0.084 arcsec/year
0.046 arcsec/year

Spectral properties of HR4051

HR4051 belongs to spectral class F9 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR4051 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR4051. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR4051