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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
sleep NighttimeWhat's Visible Now?
All Constellations » Leo » 

39 Leonis

Altitude: 30.1°   Azimuth: 90.0°   Direction: East

39 Leonis is a double main-sequence star in the constellation of Leo.

39 Leonis visual magnitude is 5.82. Because of its reltive faintness, 39 Leonis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of 39 Leonis is -0.408 arcsec per year in Right Ascension and -0.1 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 39 Leonis star
DSS2 image of 39 Leonis. The red arrow shows the motion of 39 Leonis during the next 1000 years (-6.80 arcmin in Right Ascension and -1.67 arcmin in declination);

Key facts about 39 Leonis

5.82
Main-sequence

39 Leonis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 30.1°
Azimuth: 90.0°
Direction: East

Celestial coordinates and finder chart of 39 Leonis

39 Leonis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 39 Leonis are provided in the following table:

10h 17m 14s
+23° 06’ 21”
210.81°
55.01°
Leo

The simplified sky map below shows the position of 39 Leonis in the sky:

Finder chart 39 Leonis star
Simplified finder chart for 39 Leonis.

Visibility of 39 Leonis from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's 39 Leonis rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 66.9°
Max altitude: 61.6°
Azimuth: 293.1°

Distance of 39 Leonis from the Sun and relative movement

39 Leonis is distant 74.07 light years from the Sun and it is moving far from the Sun at the speed of 38 kilometers per second.

22.72 pc
74.07 ly
38 km/s
-0.408 arcsec/year
-0.1 arcsec/year

Spectral properties of 39 Leonis

39 Leonis belongs to spectral class F8 and has a luminosity class of V corresponding to a main-sequence star.

4.04
F8V
6389K

The red dot in the diagram below shows where 39 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 39 Leonis. Attribution: Richard Powell / CC BY-SA

39 Leonis star system properties

39 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 39 Leonis double sysyem:

5.82
11.82
6
7.6 arcsec

Alternative designations of 39 Leonis

SAO81270
SAO81270
Gl 387 A