Your Guide to the Solar System and the Night Sky
Donate now! You'll help cover server costs, enhance the site and keep it ad-free.
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:03 south
wb_twilight Nautical TwilightWhat's Visible Now
All Constellations » Sextans » 

18 Sextantis

18 Sextantis is a variable giant star in the constellation of Sextans.

18 Sextantis visual magnitude is 5.65. Because of its reltive faintness, 18 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 18 Sextantis:

18 Sextantis is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 17°.

Celestial coordinates and finder chart of 18 Sextantis

18 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 18 Sextantis are provided in the following table:

10h 10m 55s
-08° 25’ 05”

The simplified sky map below shows the position of 18 Sextantis in the sky:

Finder chart 18 Sextantis star
Simplified finder chart for 18 Sextantis.

Visibility of 18 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 18 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: 98.4°
Max altitude: 30.1°
Azimuth: 261.6°
18 Sextantis is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 18 Sextantis

The image below is a photograph of 18 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 18 Sextantis is -0.006 arcsec per year in Right Ascension and -0.044 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 18 Sextantis star
DSS2 image of 18 Sextantis. The red arrow shows the motion of 18 Sextantis during the next 10000 years (-1.00 arcmin in Right Ascension and -7.33 arcmin in declination);

Distance of 18 Sextantis from the Sun and relative movement

18 Sextantis is distant 473.15 light years from the Sun

145.14 pc
473.15 ly
-0.006 arcsec/year
-0.044 arcsec/year

Spectral properties of 18 Sextantis

18 Sextantis belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 18 Sextantis is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 18 Sextantis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 18 Sextantis

18 Sextantis