We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Leo » 

Algieba - γ1 Leonis (gamma1 Leonis)

Altitude: 40.1°   Azimuth: 249.8°   Direction: West-South-West

Algieba, also designated as γ1 Leonis (gamma1 Leonis), is a variable and multiple giant star in the constellation of Leo.

Algieba visual magnitude is 2.61. Thanks to its high brightness, Algieba is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Algieba:


Algieba - γ1 Leonis (gamma1 Leonis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 40.1°
Azimuth: 249.8°
Direction: West-South-West

Celestial coordinates and finder chart of Algieba

Algieba 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 Algieba are provided in the following table:

10h 19m 58s
+19° 50’ 30”

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

Finder chart Algieba - γ1 Leonis (gamma1 Leonis) star
Simplified finder chart for Algieba - γ1 Leonis (gamma1 Leonis).

Visibility of Algieba 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 Algieba - γ1 Leonis (gamma1 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: 70.2°
Max altitude: 58.4°
Azimuth: 289.8°

Digitized Sky Survey image of Algieba

The image below is a photograph of Algieba 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 Algieba is 0.306 arcsec per year in Right Ascension and -0.147 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Algieba - γ1 Leonis (gamma1 Leonis) star
DSS2 image of Algieba. The red arrow shows the motion of Algieba during the next 1000 years (5.10 arcmin in Right Ascension and -2.45 arcmin in declination);

Distance of Algieba from the Sun and relative movement

Algieba is distant 125.58 light years from the Sun and it is moving towards the Sun at the speed of 37 kilometers per second.

38.52 pc
125.58 ly
-37 km/s
0.306 arcsec/year
-0.147 arcsec/year

Spectral properties of Algieba

Algieba belongs to spectral class K1 and has a luminosity class of III corresponding to a giant star.


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

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

Algieba star system properties

Algieba is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Algieba double sysyem:

4.5 arcsec

Alternative designations of Algieba

γ1 Leonis
(gamma1 Leonis)