Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:51  
clear_day Transit: 12:56  
SunsetSet: 21:00 south
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All Constellations » Leo » 

73 Leonis

73 Leonis is a giant star in the constellation of Leo.

73 Leonis visual magnitude is 5.32. Because of its reltive faintness, 73 Leonis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 73 Leonis:

73 Leonis is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 5°.

Celestial coordinates and finder chart of 73 Leonis

73 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 73 Leonis are provided in the following table:

11h 15m 51s
+13° 18’ 26”

The simplified sky map below shows the position of 73 Leonis in the sky:

Finder chart 73 Leonis star
Simplified finder chart for 73 Leonis.

Visibility of 73 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 73 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: 76.7°
Max altitude: 51.8°
Azimuth: 283.3°
73 Leonis is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 73 Leonis

The image below is a photograph of 73 Leonis from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 73 Leonis is -0.007 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 73 Leonis star
DSS2 image of 73 Leonis. The red arrow shows the motion of 73 Leonis during the next 100000 years (-11.67 arcmin in Right Ascension and -13.33 arcmin in declination);

Distance of 73 Leonis from the Sun and relative movement

73 Leonis is distant 478.01 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

146.63 pc
478.01 ly
18 km/s
-0.007 arcsec/year
-0.008 arcsec/year

Spectral properties of 73 Leonis

73 Leonis belongs to spectral class K3 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 73 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 73 Leonis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 73 Leonis