Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:46  
clear_day Transit: 12:56  
SunsetSet: 21:07 south
sunny DaytimeWhat's Visible Now
All Constellations » Aries » 

66 Arietis

Altitude: 34.8°   Azimuth: 263.4°   Direction: West

66 Arietis is a multiple hypergiant star in the constellation of Aries.

66 Arietis visual magnitude is 6.03. Because of its reltive faintness, 66 Arietis 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 Arietis:


66 Arietis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 34.8°
Azimuth: 263.4°
Direction: West

Celestial coordinates and finder chart of 66 Arietis

66 Arietis 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 Arietis are provided in the following table:

03h 28m 26s
+22° 48’ 15”

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

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

Visibility of 66 Arietis 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 Arietis 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: 67.2°
Max altitude: 61.3°
Azimuth: 292.8°
66 Arietis is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 66 Arietis

The image below is a photograph of 66 Arietis 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 Arietis is -0.001 arcsec per year in Right Ascension and -0.104 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 66 Arietis star
DSS2 image of 66 Arietis. The red arrow shows the motion of 66 Arietis during the next 1000 years (-0.02 arcmin in Right Ascension and -1.73 arcmin in declination);

Distance of 66 Arietis from the Sun and relative movement

66 Arietis is distant 225.76 light years from the Sun and it is moving far from the Sun at the speed of 49 kilometers per second.

69.25 pc
225.76 ly
49 km/s
-0.001 arcsec/year
-0.104 arcsec/year

Spectral properties of 66 Arietis

66 Arietis belongs to spectral class K0 and has a luminosity class of IV corresponding to a hypergiant star.


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

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

66 Arietis star system properties

66 Arietis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 66 Arietis double sysyem:

0 arcsec

Alternative designations of 66 Arietis