ι Leonis (iota Leonis)

Above the horizon. Rise: 11:29 | Tran: 18:20 | Set: 1:15

Alt: 19.90° Az: 261.55° Direction: South-West

ι Leonis is a variable and double sub-giant star of spectral class F4 in the constellation of Leo.

ι Leonis visual magnitude is 3.94. Because of its moderate brightness, ι Leonis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of ι Leonis. The red arrow shows the motion of ι Leonis during the next 1000 years (2.80 arcmin in Right Ascension and -1.25 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 11h 25m 14s

Declination +10° 23’ 20”

Hour Angle 04h 44m 02s

Sidereal Time 16h 09m 17s

J2000

Right Ascension 11h 23m 55s

Declination +10° 31’ 45”

Galactic Coordinates

Galactic Longitude 247.6°

Galactic Latitude 63.55°

Finder Chart

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Finder chart for ι Leonis (iota Leonis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.94

Class Sub-giant

Absolute magnitude 2.02

Spectral Type F4IV

Color Index (B-V) 0.41

Temperature 6827K

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

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

Star System Properties

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

Main star magnitude 3.94

Secondary star magnitude 6.74

Magnitude difference 2.8

Separation 1.1 arcsec

Distance, Radial Speed, Proper Motion

ι Leonis is distant 79.01 light years from the Sun and it is moving towards the Sun at the speed of 10 kilometers per second.

Distance (parsec) 24.24

Distance (light year) 79.01

Radial Speed -10 km/s

Proper Motion RA 0.168 arcsec/y

Proper Motion Dec -0.075"/y

Alternative Designations

Bayer designation ι Leonis
(iota Leonis)

Flamsteed designation 78 Leonis

Henry Draper Catalogue HD99028

SAO Catalogue SAO99587

Hipparcos Catalogue HIP55642

Durchmusterung Catalogue BD+11 2348

General Catalogue of Variable Stars 5184

Aitken Double Star Catalogue ADS8148

Visibility from Your Location

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

Azimuth: 79.6° RISE 11:29

Max altitude: 48.9° TRANSIT 18:20

Azimuth: 280.4° SET 1:15

Set Location

Other stars in Leo