3 Leonis

Below the horizon. Rise: 11:36 | Tran: 18:15 | Set: 0:54

Alt: -30.44° Az: 359.53° Direction: North

3 Leonis is a double hypergiant star of spectral class K0 in the constellation of Leo.

3 Leonis visual magnitude is 5.71. Because of its faintness, 3 Leonis is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 3 Leonis. The red arrow shows the motion of 3 Leonis during the next 10000 years (-4.50 arcmin in Right Ascension and -5.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 09h 29m 50s

Declination +08° 04’ 35”

Hour Angle 11h 58m 21s

Sidereal Time 21h 28m 11s

J2000

Right Ascension 09h 28m 29s

Declination +08° 11’ 17”

Galactic Coordinates

Galactic Longitude 224.64°

Galactic Latitude 38.5°

Finder Chart

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Finder chart for 3 Leonis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.71

Class Hypergiant

Absolute magnitude -0.30

Spectral Type K0III

Color Index (B-V) 1.04

Temperature 4649K

The red dot in the diagram below shows where 3 Leonis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 3 Leonis. Attribution: Richard Powell / CC BY-SA

Star System Properties

3 Leonis 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 3 Leonis double sysyem:

Main star magnitude 5.71

Secondary star magnitude 11.01

Magnitude difference 5.3

Separation 25.2 arcsec

Distance, Radial Speed, Proper Motion

3 Leonis is distant 518.28 light years from the Sun and it is moving far from the Sun at the speed of 22 kilometers per second.

Distance (parsec) 158.98

Distance (light year) 518.28

Radial Speed 22 km/s

Proper Motion RA -0.027 arcsec/y

Proper Motion Dec -0.03"/y

Alternative Designations

Flamsteed designation 3 Leonis

Henry Draper Catalogue HD81873

SAO Catalogue SAO117718

Hipparcos Catalogue HIP46457

Durchmusterung Catalogue BD+08 2226

FK5 Catalogue 2752

Aitken Double Star Catalogue ADS7391

Visibility from Your Location

Today's 3 Leonis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 81.9° RISE 11:36

Max altitude: 46.6° TRANSIT 18:15

Azimuth: 278.1° SET 0:54

Set Location

Other stars in Leo