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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: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sunny DaytimeWhat's Visible Now?
All Constellations » Aries » 

20 Arietis

Altitude: 13.0°   Azimuth: 64.7°   Direction: East-North-East

20 Arietis is a sub-giant star in the constellation of Aries.

20 Arietis visual magnitude is 5.79. Because of its reltive faintness, 20 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 20 Arietis:


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

Altitude: 13.0°
Azimuth: 64.7°
Direction: East-North-East

Celestial coordinates and finder chart of 20 Arietis

20 Arietis is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 20 Arietis are provided in the following table:

02h 15m 46s
+25° 46’ 59”

The simplified sky map below shows the position of 20 Arietis in the sky:

Finder chart 20 Arietis star
Simplified finder chart for 20 Arietis.

Visibility of 20 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 20 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: 64.2°
Max altitude: 64.3°
Azimuth: 295.8°

Digitized Sky Survey image of 20 Arietis

The image below is a photograph of 20 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 20 Arietis is 0.176 arcsec per year in Right Ascension and -0.063 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 20 Arietis star
DSS2 image of 20 Arietis. The red arrow shows the motion of 20 Arietis during the next 1000 years (2.93 arcmin in Right Ascension and -1.05 arcmin in declination);

Distance of 20 Arietis from the Sun and relative movement

20 Arietis is distant 130.77 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

40.11 pc
130.77 ly
26 km/s
0.176 arcsec/year
-0.063 arcsec/year

Spectral properties of 20 Arietis

20 Arietis belongs to spectral class F6 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 20 Arietis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 20 Arietis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 20 Arietis