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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
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
All Constellations » Leo » 

90 Leonis

Altitude: 30.6°   Azimuth: 101.8°   Direction: East-South-East

90 Leonis is a multiple main-sequence star in the constellation of Leo.

90 Leonis visual magnitude is 5.95. Because of its reltive faintness, 90 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 90 Leonis:


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

Altitude: 30.6°
Azimuth: 101.8°
Direction: East-South-East

Celestial coordinates and finder chart of 90 Leonis

90 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 90 Leonis are provided in the following table:

11h 34m 42s
+16° 47’ 48”

The simplified sky map below shows the position of 90 Leonis in the sky:

Finder chart 90 Leonis star
Simplified finder chart for 90 Leonis.

Visibility of 90 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 90 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: 73.2°
Max altitude: 55.3°
Azimuth: 286.8°

Digitized Sky Survey image of 90 Leonis

The image below is a photograph of 90 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 90 Leonis is -0.011 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 90 Leonis star
DSS2 image of 90 Leonis. The red arrow shows the motion of 90 Leonis during the next 10000 years (-1.83 arcmin in Right Ascension and 0.50 arcmin in declination);

Distance of 90 Leonis from the Sun and relative movement

90 Leonis is distant 1,987.80 light years from the Sun and it is moving far from the Sun at the speed of 19 kilometers per second.

609.76 pc
1,987.80 ly
19 km/s
-0.011 arcsec/year
0.003 arcsec/year

Spectral properties of 90 Leonis

90 Leonis belongs to spectral class B4 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 90 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 90 Leonis. Attribution: Richard Powell / CC BY-SA

90 Leonis star system properties

90 Leonis is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 90 Leonis double sysyem:

3.6 arcsec

Alternative designations of 90 Leonis