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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: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Leo » 

42 Leonis

Altitude: -19.0°   Azimuth: 330.7°   Direction: North-North-West

42 Leonis is a variable main-sequence star in the constellation of Leo.

42 Leonis visual magnitude is 6.12. Because of its reltive faintness, 42 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 42 Leonis is -0.035 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 42 Leonis star
DSS2 image of 42 Leonis. The red arrow shows the motion of 42 Leonis during the next 10000 years (-5.83 arcmin in Right Ascension and -2.50 arcmin in declination);

Key facts about 42 Leonis


42 Leonis is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -19.0°
Azimuth: 330.7°
Direction: North-North-West

Celestial coordinates and finder chart of 42 Leonis

42 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 42 Leonis are provided in the following table:

10h 21m 50s
+14° 58’ 32”

The simplified sky map below shows the position of 42 Leonis in the sky:

Finder chart 42 Leonis star
Simplified finder chart for 42 Leonis.

Visibility of 42 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 42 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: 75.0°
Max altitude: 53.5°
Azimuth: 285.0°

Distance of 42 Leonis from the Sun and relative movement

42 Leonis is distant 475.91 light years from the Sun and it is moving far from the Sun at the speed of 9 kilometers per second.

145.99 pc
475.91 ly
9 km/s
-0.035 arcsec/year
-0.015 arcsec/year

Spectral properties of 42 Leonis

42 Leonis belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 42 Leonis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 42 Leonis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 42 Leonis