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: 6:55  
clear_day Transit: 12:49  
SunsetSet: 18:41 south
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All Constellations » Leo » 

Subra - ο Leonis (omicron Leonis)

Altitude: 11.5°   Azimuth: 271.5°   Direction: West

Subra, also designated as ο Leonis (omicron Leonis), is a multiple bright giant star in the constellation of Leo.

Subra visual magnitude is 3.52. Because of its moderate brightness, Subra should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Subra:

Bright giant

Subra - ο Leonis (omicron Leonis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 11.5°
Azimuth: 271.5°
Direction: West

Celestial coordinates and finder chart of Subra

Subra 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 Subra are provided in the following table:

09h 41m 08s
+09° 53’ 31”

The simplified sky map below shows the position of Subra in the sky:

Finder chart Subra - ο Leonis (omicron Leonis) star
Simplified finder chart for Subra - ο Leonis (omicron Leonis).

Visibility of Subra 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 Subra - ο Leonis (omicron 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: 80.1°
Max altitude: 48.4°
Azimuth: 279.9°

Digitized Sky Survey image of Subra

The image below is a photograph of Subra 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 Subra is -0.142 arcsec per year in Right Ascension and -0.037 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Subra - ο Leonis (omicron Leonis) star
DSS2 image of Subra. The red arrow shows the motion of Subra during the next 1000 years (-2.37 arcmin in Right Ascension and -0.62 arcmin in declination);

Distance of Subra from the Sun and relative movement

Subra is distant 135.16 light years from the Sun and it is moving far from the Sun at the speed of 27 kilometers per second.

41.46 pc
135.16 ly
27 km/s
-0.142 arcsec/year
-0.037 arcsec/year

Spectral properties of Subra

Subra belongs to spectral class F6 and has a luminosity class of II corresponding to a bright giant star.


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

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

Subra star system properties

Subra 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 Subra double sysyem:

0 arcsec

Alternative designations of Subra

ο Leonis
(omicron Leonis)