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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
SunriseRise: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
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All Constellations » Aries » 

Mesarthim - γ2 Arietis (gamma2 Arietis)

Altitude: 56.9°   Azimuth: 162.6°   Direction: South-South-East

Mesarthim, also designated as γ2 Arietis (gamma2 Arietis), is a variable and multiple star in the constellation of Aries.

Mesarthim visual magnitude is 4.75. Because of its moderate brightness, Mesarthim should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of Mesarthim is 0.079 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 Mesarthim - γ2 Arietis (gamma2 Arietis) star
DSS2 image of Mesarthim. The red arrow shows the motion of Mesarthim during the next 1000 years (1.32 arcmin in Right Ascension and -1.73 arcmin in declination);

Key facts about Mesarthim


Mesarthim - γ2 Arietis (gamma2 Arietis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 56.9°
Azimuth: 162.6°
Direction: South-South-East

Celestial coordinates and finder chart of Mesarthim

Mesarthim 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 Mesarthim are provided in the following table:

01h 53m 31s
+19° 17’ 36”

The simplified sky map below shows the position of Mesarthim in the sky:

Finder chart Mesarthim - γ2 Arietis (gamma2 Arietis) star
Simplified finder chart for Mesarthim - γ2 Arietis (gamma2 Arietis).

Visibility of Mesarthim 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 Mesarthim - γ2 Arietis (gamma2 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: 70.7°
Max altitude: 57.8°
Azimuth: 289.3°

Distance of Mesarthim from the Sun and relative movement

Mesarthim is distant 204.26 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

62.66 pc
204.26 ly
-1 km/s
0.079 arcsec/year
-0.104 arcsec/year

Spectral properties of Mesarthim

Mesarthim belongs to spectral class A1 Mesarthim is also a Si chemically peculiar star.


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

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

Mesarthim star system properties

Mesarthim is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Mesarthim double sysyem:

7.8 arcsec

Alternative designations of Mesarthim

γ2 Arietis
(gamma2 Arietis)