Algieba - γ1 Leonis (gamma1 Leonis)

Above the horizon. Rise: 4:05 | Tran: 11:49 | Set: 19:34

Alt: 26.96° Az: 91.79° Direction: East

Algieba, also designated as γ1 Leonis (gamma1 Leonis), is a variable and multiple giant star of spectral class K1 in the constellation of Leo.

Algieba visual magnitude is 2.61. Because of its brightness, Algieba is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

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);

Celestial Coordinates

Apparent

Right Ascension 10h 21m 19s

Declination +19° 43’ 00”

Hour Angle 19h 15m 24s

Sideral Time 05h 36m 43s

J2000

Right Ascension 10h 19m 58s

Declination +19° 50’ 30”

Galactic Coordinates

Galactic Longitude 216.55°

Galactic Latitude 54.65°

Finder Chart

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

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 2.61

Class Giant

Absolute magnitude -0.32

Spectral Type K1III

Color Index (B-V) 1.15

Temperature 4409K

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

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

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:

Main star magnitude 2.61

Secondary star magnitude 3.81

Magnitude difference 1.2

Separation 4.5 arcsec

Distance, Radial Speed, Proper Motion

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.

Distance (parsec) 38.52

Distance (light year) 125.58

Radial Speed -37 km/s

Proper Motion RA 0.306 arcsec/y

Proper Motion Dec -0.147"/y

Alternative Designations

Proper Name Algieba

Bayer designation γ1 Leonis
(gamma1 Leonis)

Flamsteed designation 41 Leonis

Henry Draper Catalogue HD89484

SAO Catalogue SAO81298

Hipparcos Catalogue HIP50583

Durchmusterung Catalogue BD+20 2467

General Catalogue of Variable Stars 4823

Aitken Double Star Catalogue ADS7724

Visibility from Your Location

Today's Algieba - γ1 Leonis (gamma1 Leonis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 70.3° RISE 4:05

Max altitude: 58.2° TRANSIT 11:49

Azimuth: 289.7° SET 19:34

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Leo