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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: 7:01  
clear_day Transit: 12:12  
SunsetSet: 17:24
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All Constellations » Fornax » 

σ Fornacis (sigma Fornacis)

Altitude: -32.9°   Azimuth: 262.9°   Direction: West

σ Fornacis is a double main-sequence star in the constellation of Fornax.

σ Fornacis visual magnitude is 5.9. Because of its reltive faintness, σ Fornacis 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 σ Fornacis is 0.004 arcsec per year in Right Ascension and 0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of σ Fornacis (sigma Fornacis) star
DSS2 image of σ Fornacis. The red arrow shows the motion of σ Fornacis during the next 10000 years (0.67 arcmin in Right Ascension and 2.00 arcmin in declination);

Key facts about σ Fornacis


σ Fornacis (sigma Fornacis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -32.9°
Azimuth: 262.9°
Direction: West

Celestial coordinates and finder chart of σ Fornacis

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

03h 46m 27s
-29° 20’ 17”

The simplified sky map below shows the position of σ Fornacis in the sky:

Finder chart σ Fornacis (sigma Fornacis) star
Simplified finder chart for σ Fornacis (sigma Fornacis).

Visibility of σ Fornacis 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 σ Fornacis (sigma Fornacis) 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: 119.3°
Max altitude: 9.2°
Azimuth: 240.7°

Distance of σ Fornacis from the Sun and relative movement

σ Fornacis is distant 329.29 light years from the Sun and it is moving towards the Sun at the speed of 13 kilometers per second.

101.01 pc
329.29 ly
-13 km/s
0.004 arcsec/year
0.012 arcsec/year

Spectral properties of σ Fornacis

σ Fornacis belongs to spectral class A3 and has a luminosity class of V corresponding to a main-sequence star.


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

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

σ Fornacis star system properties

σ Fornacis 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 σ Fornacis double sysyem:

5 arcsec

Alternative designations of σ Fornacis

σ Fornacis
(sigma Fornacis)