σ Boötis (sigma Boötis)
σ Boötis is a variable and multiple main-sequence star in the constellation of Boötes.
σ Boötis visual magnitude is 4.46. Because of its moderate brightness, σ Boötis 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 proper motion of σ Boötis is 0.189 arcsec per year in Right Ascension and 0.132 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Key facts about σ Boötis
Celestial coordinates and finder chart of σ Boötis
σ Boötis 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 σ Boötis are provided in the following table:
The simplified sky map below shows the position of σ Boötis in the sky:
Visibility of σ Boötis from your location
Today's σ Boötis (sigma Boötis) rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):
Distance of σ Boötis from the Sun and relative movement
σ Boötis is distant 50.42 light years from the Sun
Spectral properties of σ Boötis
σ Boötis belongs to spectral class F2 and has a luminosity class of V corresponding to a main-sequence star.
The red dot in the diagram below shows where σ Boötis is situated in the Hertzsprung–Russell diagram.
σ Boötis star system properties
σ Boötis 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 σ Boötis double sysyem: