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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: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
sleep NighttimeWhat's Visible Now?
All Constellations » Leo » 


Altitude: 68.0°   Azimuth: 171.1°   Direction: South

HR3942 is a giant star in the constellation of Leo.

HR3942 visual magnitude is 5.73. Because of its reltive faintness, HR3942 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR3942 is -0.095 arcsec per year in Right Ascension and -0.039 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR3942 star
DSS2 image of HR3942. The red arrow shows the motion of HR3942 during the next 1000 years (-1.58 arcmin in Right Ascension and -0.65 arcmin in declination);

Key facts about HR3942


HR3942 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 68.0°
Azimuth: 171.1°
Direction: South

Celestial coordinates and finder chart of HR3942

HR3942 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR3942 are provided in the following table:

09h 59m 36s
+29° 38’ 43”

The simplified sky map below shows the position of HR3942 in the sky:

Finder chart HR3942 star
Simplified finder chart for HR3942.

Visibility of HR3942 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 HR3942 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: 60.4°
Max altitude: 68.2°
Azimuth: 299.6°

Distance of HR3942 from the Sun and relative movement

HR3942 is distant 324.38 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

99.50 pc
324.38 ly
-1 km/s
-0.095 arcsec/year
-0.039 arcsec/year

Spectral properties of HR3942

HR3942 belongs to spectral class G9


The red dot in the diagram below shows where HR3942 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR3942. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3942