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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: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
sunny DaytimeWhat's Visible Now?
All Constellations » Orion » 

23 Orionis

Altitude: -32.5°   Azimuth: 23.6°   Direction: North-North-East

23 Orionis is a double main-sequence star in the constellation of Orion.

23 Orionis visual magnitude is 5. Because of its moderate brightness, 23 Orionis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 23 Orionis:


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

Altitude: -32.5°
Azimuth: 23.6°
Direction: North-North-East

Celestial coordinates and finder chart of 23 Orionis

23 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 23 Orionis are provided in the following table:

05h 22m 50s
+03° 32’ 39”

The simplified sky map below shows the position of 23 Orionis in the sky:

Finder chart 23 Orionis star
Simplified finder chart for 23 Orionis.

Visibility of 23 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 23 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: 86.5°
Max altitude: 42.1°
Azimuth: 273.5°

Digitized Sky Survey image of 23 Orionis

The image below is a photograph of 23 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 23 Orionis is -0.004 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 23 Orionis star
DSS2 image of 23 Orionis. The red arrow shows the motion of 23 Orionis during the next 100000 years (-6.67 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of 23 Orionis from the Sun and relative movement

23 Orionis is distant 961.65 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

294.99 pc
961.65 ly
18 km/s
-0.004 arcsec/year
-0.002 arcsec/year

Spectral properties of 23 Orionis

23 Orionis belongs to spectral class B1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 23 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 23 Orionis. Attribution: Richard Powell / CC BY-SA

23 Orionis star system properties

23 Orionis is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 23 Orionis double sysyem:

31.9 arcsec

Alternative designations of 23 Orionis