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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: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Orion » 

66 Orionis

Altitude: -34.3°   Azimuth: 4.0°   Direction: North

66 Orionis is a giant star in the constellation of Orion.

66 Orionis visual magnitude is 5.63. Because of its reltive faintness, 66 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 66 Orionis:


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

Altitude: -34.3°
Azimuth: 4.0°
Direction: North

Celestial coordinates and finder chart of 66 Orionis

66 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 66 Orionis are provided in the following table:

06h 04m 58s
+04° 09’ 30”

The simplified sky map below shows the position of 66 Orionis in the sky:

Finder chart 66 Orionis star
Simplified finder chart for 66 Orionis.

Visibility of 66 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 66 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: 85.8°
Max altitude: 42.7°
Azimuth: 274.2°

Digitized Sky Survey image of 66 Orionis

The image below is a photograph of 66 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 66 Orionis is -0.001 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 66 Orionis star
DSS2 image of 66 Orionis. The red arrow shows the motion of 66 Orionis during the next 100000 years (-1.67 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of 66 Orionis from the Sun and relative movement

66 Orionis is distant 2,488.55 light years from the Sun and it is moving far from the Sun at the speed of 33 kilometers per second.

763.36 pc
2,488.55 ly
33 km/s
-0.001 arcsec/year
-0.005 arcsec/year

Spectral properties of 66 Orionis

66 Orionis belongs to spectral class G4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 66 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 66 Orionis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 66 Orionis