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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
north SunriseRise: 7:40  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
sunny DaytimeWhat's Visible Now?
All Constellations » Sextans » 

12 Sextantis

Altitude: 31.9°   Azimuth: 227.9°   Direction: South-West

12 Sextantis is a variable hypergiant star in the constellation of Sextans.

12 Sextantis visual magnitude is 6.7. Because of its reltive faintness, 12 Sextantis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 12 Sextantis:


12 Sextantis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 31.9°
Azimuth: 227.9°
Direction: South-West

Celestial coordinates and finder chart of 12 Sextantis

12 Sextantis 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 12 Sextantis are provided in the following table:

09h 59m 43s
+03° 23’ 04”

The simplified sky map below shows the position of 12 Sextantis in the sky:

Finder chart 12 Sextantis star
Simplified finder chart for 12 Sextantis.

Visibility of 12 Sextantis 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 12 Sextantis 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: 86.6°
Max altitude: 41.9°
Azimuth: 273.4°

Digitized Sky Survey image of 12 Sextantis

The image below is a photograph of 12 Sextantis from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 12 Sextantis is -0.066 arcsec per year in Right Ascension and 0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 12 Sextantis star
DSS2 image of 12 Sextantis. The red arrow shows the motion of 12 Sextantis during the next 10000 years (-11.00 arcmin in Right Ascension and 3.67 arcmin in declination);

Distance of 12 Sextantis from the Sun and relative movement

12 Sextantis is distant 241.30 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

74.02 pc
241.30 ly
-4 km/s
-0.066 arcsec/year
0.022 arcsec/year

Spectral properties of 12 Sextantis

12 Sextantis belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 12 Sextantis is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 12 Sextantis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 12 Sextantis

12 Sextantis