20 Leonis

Below the horizon. Rise: 3:14 | Tran: 11:07 | Set: 19:00

Alt: -17.31° Az: 354.88° Direction: North

20 Leonis is a variable and double sub-giant star of spectral class A7 in the constellation of Leo.

20 Leonis visual magnitude is 6.09. Because of its faintness, 20 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 20 Leonis. The red arrow shows the motion of 20 Leonis during the next 10000 years (-7.17 arcmin in Right Ascension and -2.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 09h 51m 12s

Declination +21° 03’ 47”

Hour Angle 11h 39m 02s

Sideral Time 21h 30m 15s

J2000

Right Ascension 09h 49m 50s

Declination +21° 10’ 45”

Galactic Coordinates

Galactic Longitude 210.95°

Galactic Latitude 48.37°

Finder Chart

Simplified finder chart for 20 Leonis.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.09

Class Sub-giant

Absolute magnitude 0.10

Spectral Type A7IV

Color Index (B-V) 0.25

Temperature 7795K

The red dot in the diagram below shows where 20 Leonis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 20 Leonis. Attribution: Richard Powell / CC BY-SA

Star System Properties

20 Leonis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 20 Leonis double sysyem:

Main star magnitude 6.09

Secondary star magnitude 6.39

Magnitude difference 0.3

Separation 0.3 arcsec

Distance, Radial Speed, Proper Motion

20 Leonis is distant 514.20 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

Distance (parsec) 157.73

Distance (light year) 514.20

Radial Speed 26 km/s

Proper Motion RA -0.043 arcsec/y

Proper Motion Dec -0.012"/y

Alternative Designations

Flamsteed designation 20 Leonis

Henry Draper Catalogue HD85040

SAO Catalogue SAO81035

Hipparcos Catalogue HIP48218

Durchmusterung Catalogue BD+21 2113

FK5 Catalogue 2785

General Catalogue of Variable Stars DG Leo

Visibility from Your Location

Today's 20 Leonis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 68.9° RISE 3:14

Max altitude: 59.6° TRANSIT 11:07

Azimuth: 291.1° SET 19:00

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

Location

Other stars in Leo