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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: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
sleep NighttimeWhat's Visible Now?
All Constellations » Leo Minor » 


Altitude: 59.3°   Azimuth: 117.8°   Direction: East-South-East

HR3979 is a multiple main-sequence star in the constellation of Leo Minor.

HR3979 visual magnitude is 6.24. Because of its reltive faintness, HR3979 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 HR3979 is -0.083 arcsec per year in Right Ascension and -0.08 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3979 star
DSS2 image of HR3979. The red arrow shows the motion of HR3979 during the next 10000 years (-13.83 arcmin in Right Ascension and -13.33 arcmin in declination);

Key facts about HR3979


HR3979 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 59.3°
Azimuth: 117.8°
Direction: East-South-East

Celestial coordinates and finder chart of HR3979

HR3979 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 HR3979 are provided in the following table:

10h 08m 15s
+31° 36’ 15”
Leo Minor

The simplified sky map below shows the position of HR3979 in the sky:

Finder chart HR3979 star
Simplified finder chart for HR3979.

Visibility of HR3979 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 HR3979 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: 58.4°
Max altitude: 70.1°
Azimuth: 301.6°

Distance of HR3979 from the Sun and relative movement

HR3979 is distant 206.33 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

63.29 pc
206.33 ly
-8 km/s
-0.083 arcsec/year
-0.08 arcsec/year

Spectral properties of HR3979

HR3979 belongs to spectral class F4 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR3979 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3979. Attribution: Richard Powell / CC BY-SA

HR3979 star system properties

HR3979 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 HR3979 double sysyem:

0.2 arcsec

Alternative designations of HR3979