σ Centauri (sigma Centauri)
σ Centauri is a main-sequence star in the constellation of Centaurus.
σ Centauri visual magnitude is 3.91. Because of its moderate brightness, σ Centauri should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about σ Centauri:
Celestial coordinates and finder chart of σ Centauri
σ Centauri is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of σ Centauri are provided in the following table:
The simplified sky map below shows the position of σ Centauri in the sky:
Visibility of σ Centauri from your location
σ Centauri (sigma Centauri) is currently not visible from Greenwich, United Kingdom [change]
Digitized Sky Survey image of σ Centauri
The image below is a photograph of σ Centauri 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 σ Centauri is -0.03 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of σ Centauri from the Sun and relative movement
σ Centauri is distant 442.93 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.
Spectral properties of σ Centauri
σ Centauri belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.
The red dot in the diagram below shows where σ Centauri is situated in the Hertzsprung–Russell diagram.