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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: 6:08  
clear_day Transit: 12:59  
SunsetSet: 19:51
sunny DaytimeWhat's Visible Now?
All Constellations » Capricornus » 

31 Capricorni

Altitude: 17.1°   Azimuth: 206.9°   Direction: South-South-West

31 Capricorni is a main-sequence star in the constellation of Capricornus.

31 Capricorni visual magnitude is 7.05. Because of its reltive faintness, 31 Capricorni 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 31 Capricorni is 0.036 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 31 Capricorni star
DSS2 image of 31 Capricorni. The red arrow shows the motion of 31 Capricorni during the next 10000 years (6.00 arcmin in Right Ascension and 0.67 arcmin in declination);

Key facts about 31 Capricorni


31 Capricorni is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 17.1°
Azimuth: 206.9°
Direction: South-South-West

Celestial coordinates and finder chart of 31 Capricorni

31 Capricorni 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 31 Capricorni are provided in the following table:

21h 18m 15s
-17° 27’ 43”

The simplified sky map below shows the position of 31 Capricorni in the sky:

Finder chart 31 Capricorni star
Simplified finder chart for 31 Capricorni.

Visibility of 31 Capricorni 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 31 Capricorni 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: 107.5°
Max altitude: 21.1°
Azimuth: 252.5°

Distance of 31 Capricorni from the Sun and relative movement

31 Capricorni is distant 337.82 light years from the Sun and it is moving towards the Sun at the speed of 7 kilometers per second.

103.63 pc
337.82 ly
-7 km/s
0.036 arcsec/year
0.004 arcsec/year

Spectral properties of 31 Capricorni

31 Capricorni belongs to spectral class F2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 31 Capricorni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 31 Capricorni. Attribution: Richard Powell / CC BY-SA

Alternative designations of 31 Capricorni

31 Capricorni