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public LocationGreenwich, UK
TimezoneEurope/London
Sunrise: 5:12 
Transit: 13:06 
Sunset: 20:59
sunny   (Daytime)   What's Visible Now?
All Constellations » Leo » 

81 Leonis

Below the horizon.  Rise: 8:55 | Tran: 16:19 | Set: 23:43
Alt: -9.30°   Az: 48.47°   Direction: North-East

81 Leonis is a double main-sequence star of spectral class F2 in the constellation of Leo.

81 Leonis visual magnitude is 5.57. Because of its faintness, 81 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.

Image of 81 Leonis star
DSS2 image of 81 Leonis. The red arrow shows the motion of 81 Leonis during the next 1000 years (-2.38 arcmin in Right Ascension and -0.08 arcmin in declination);

Celestial Coordinates

Apparent

11h 26m 53s
+16° 19’ 16”
15h 21m 20s
02h 48m 13s

J2000

11h 25m 36s
+16° 27’ 23”

Galactic Coordinates

236.75°
67.45°

Finder Chart

Finder chart 81 Leonis star
Simplified finder chart for 81 Leonis.

Magnitude, Color, Spectral Class

5.57
Main-sequence

2.20
F2V
7101K

The red dot in the diagram below shows where 81 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 81 Leonis. Attribution: Richard Powell / CC BY-SA

Star System Properties

81 Leonis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 81 Leonis double sysyem:

5.57
9.17
3.6
55.7 arcsec

Distance, Radial Speed, Proper Motion

81 Leonis is distant 154.14 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

47.28
154.14
18 km/s
-0.143 arcsec/y
-0.005"/y

Alternative Designations

SAO99601
SAO99601

Visibility from Your Location

Today's 81 Leonis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 73.7°
Max altitude: 54.8°
Azimuth: 286.3°