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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:57 
Transit: 12:56 
Sunset: 20:56
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All Constellations » Leo » 

31 Leonis

Above the horizon.  Rise: 12:10 | Tran: 18:58 | Set: 1:51
Alt: 40.44°   Az: 224.85°   Direction: South-West

31 Leonis is a double giant star of spectral class K3 in the constellation of Leo.

31 Leonis visual magnitude is 4.37. Because of its moderate brightness, 31 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.

Image of 31 Leonis star
DSS2 image of 31 Leonis. The red arrow shows the motion of 31 Leonis during the next 10000 years (-13.33 arcmin in Right Ascension and -10.17 arcmin in declination);

Celestial Coordinates

Apparent

10h 09m 15s
+09° 52’ 21”
02h 12m 02s
12h 21m 17s

J2000

10h 07m 54s
+09° 59’ 51”

Galactic Coordinates

228.95°
47.89°

Finder Chart

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Finder chart for 31 Leonis.

Magnitude, Color, Spectral Class

4.37
Giant

-0.25
K3III
3870K

The red dot in the diagram below shows where 31 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 31 Leonis. Attribution: Richard Powell / CC BY-SA

Star System Properties

31 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 31 Leonis double sysyem:

4.37
12.07
7.7
7.9 arcsec

Distance, Radial Speed, Proper Motion

31 Leonis is distant 274.18 light years from the Sun and it is moving far from the Sun at the speed of 41 kilometers per second.

84.10
274.18
41 km/s
-0.08 arcsec/y
-0.061"/y

Alternative Designations

SAO98964
SAO98964

Visibility from Your Location

Today's 31 Leonis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 80.1°
Max altitude: 48.4°
Azimuth: 279.9°