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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sunny DaytimeWhat's Visible Now?
All Constellations » Leo » 

υ Leonis (upsilon Leonis)

Altitude: -12.3°   Azimuth: 284.5°   Direction: West-North-West

υ Leonis is a double giant star in the constellation of Leo.

υ Leonis visual magnitude is 4.3. Because of its moderate brightness, υ Leonis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about υ Leonis:


υ Leonis (upsilon Leonis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -12.3°
Azimuth: 284.5°
Direction: West-North-West

Celestial coordinates and finder chart of υ Leonis

υ Leonis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of υ Leonis are provided in the following table:

11h 36m 56s
-00° 49’ 26”

The simplified sky map below shows the position of υ Leonis in the sky:

Finder chart υ Leonis (upsilon Leonis) star
Simplified finder chart for υ Leonis (upsilon Leonis).

Visibility of υ Leonis from your location

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

Today's υ Leonis (upsilon Leonis) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 90.8°
Max altitude: 37.7°
Azimuth: 269.2°

Digitized Sky Survey image of υ Leonis

The image below is a photograph of υ Leonis 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 υ Leonis is 0.004 arcsec per year in Right Ascension and 0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of υ Leonis (upsilon Leonis) star
DSS2 image of υ Leonis. The red arrow shows the motion of υ Leonis during the next 10000 years (0.67 arcmin in Right Ascension and 7.17 arcmin in declination);

Distance of υ Leonis from the Sun and relative movement

υ Leonis is distant 178.04 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

54.61 pc
178.04 ly
1 km/s
0.004 arcsec/year
0.043 arcsec/year

Spectral properties of υ Leonis

υ Leonis belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


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

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

υ Leonis star system properties

υ Leonis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the υ Leonis double sysyem:

0.1 arcsec

Alternative designations of υ Leonis

υ Leonis
(upsilon Leonis)