40 Leonis

Above the horizon. Rise: 11:05 | Tran: 18:47 | Set: 2:33

Alt: 15.54° Az: 78.31° Direction: East-North-East

40 Leonis is a variable sub-giant star of spectral class F6 in the constellation of Leo.

40 Leonis visual magnitude is 4.79. Because of its moderate brightness, 40 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 40 Leonis. The red arrow shows the motion of 40 Leonis during the next 1000 years (-3.90 arcmin in Right Ascension and -3.57 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 10h 21m 07s

Declination +19° 20’ 33”

Hour Angle 18h 03m 25s

Sidereal Time 04h 24m 32s

J2000

Right Ascension 10h 19m 44s

Declination +19° 28’ 14”

Galactic Coordinates

Galactic Longitude 217.12°

Galactic Latitude 54.48°

Finder Chart

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Finder chart for 40 Leonis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.79

Class Sub-giant

Absolute magnitude 3.16

Spectral Type F6IV

Color Index (B-V) 0.45

Temperature 6625K

The red dot in the diagram below shows where 40 Leonis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 40 Leonis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

40 Leonis is distant 69.01 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

Distance (parsec) 21.17

Distance (light year) 69.01

Radial Speed 7 km/s

Proper Motion RA -0.234 arcsec/y

Proper Motion Dec -0.214"/y

Alternative Designations

Flamsteed designation 40 Leonis

Henry Draper Catalogue HD89449

SAO Catalogue SAO99065

Hipparcos Catalogue HIP50564

Durchmusterung Catalogue BD+20 2466

Gliese Catalogue Gl 388.1

General Catalogue of Variable Stars 4822

Visibility from Your Location

Today's 40 Leonis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 70.7° RISE 11:05

Max altitude: 57.9° TRANSIT 18:47

Azimuth: 289.3° SET 2:33

Set Location

Other stars in Leo