We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Orion » 

18 Orionis

Altitude: -25.5°   Azimuth: 341.6°   Direction: North-North-West

18 Orionis is a hypergiant star in the constellation of Orion.

18 Orionis visual magnitude is 5.56. Because of its reltive faintness, 18 Orionis 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 Orionis:


18 Orionis is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -25.5°
Azimuth: 341.6°
Direction: North-North-West

Celestial coordinates and finder chart of 18 Orionis

18 Orionis 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 Orionis are provided in the following table:

05h 16m 04s
+11° 20’ 29”

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

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

Visibility of 18 Orionis 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 Orionis 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: 78.7°
Max altitude: 49.9°
Azimuth: 281.3°

Digitized Sky Survey image of 18 Orionis

The image below is a photograph of 18 Orionis 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 Orionis is -0.009 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 18 Orionis star
DSS2 image of 18 Orionis. The red arrow shows the motion of 18 Orionis during the next 100000 years (-15.00 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of 18 Orionis from the Sun and relative movement

18 Orionis is distant 367.95 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

112.87 pc
367.95 ly
-8 km/s
-0.009 arcsec/year
-0.005 arcsec/year

Spectral properties of 18 Orionis

18 Orionis belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where 18 Orionis is situated in the Hertzsprung–Russell diagram.

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

Alternative designations of 18 Orionis