Your guide to the Solar System and the night sky
By donating now you help keep this site alive and free from ads. Please consider supporting this project, thank you!
🌎  Observing from: Greenwich, United Kingdom [change]

θ Mensae (theta Mensae)

θ Mensae is a main-sequence star in the constellation of Mensa.

θ Mensae visual magnitude is 5.45. Because of its reltive faintness, θ Mensae 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 θ Mensae:

θ Mensae (theta Mensae) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of θ Mensae

θ Mensae is situated close to the southern celestial pole and, as such, it is easilty visible for most part of the year from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of θ Mensae are provided in the following table:

06h 56m 34s
-79° 25’ 13”

The simplified sky map below shows the position of θ Mensae in the sky:

Finder chart θ Mensae (theta Mensae) star
Simplified finder chart for θ Mensae (theta Mensae).

Visibility of θ Mensae from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

θ Mensae (theta Mensae) is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of θ Mensae

The image below is a photograph of θ Mensae 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 θ Mensae is -0.007 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of θ Mensae (theta Mensae) star
DSS2 image of θ Mensae. The red arrow shows the motion of θ Mensae during the next 100000 years (-11.67 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of θ Mensae from the Sun and relative movement

θ Mensae is distant 355.51 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

109.05 pc
355.51 ly
6 km/s
-0.007 arcsec/year

Spectral properties of θ Mensae

θ Mensae belongs to spectral class B9 and has a luminosity class of V corresponding to a main-sequence star.


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

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

Alternative designations of θ Mensae

θ Mensae
(theta Mensae)