σ Aquilae (sigma Aquilae)
σ Aquilae is a variable and multiple main-sequence star in the constellation of Aquila.
σ Aquilae visual magnitude is 5.17. Because of its reltive faintness, σ Aquilae 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 σ Aquilae:
Celestial coordinates and finder chart of σ Aquilae
σ Aquilae 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 σ Aquilae are provided in the following table:
The simplified sky map below shows the position of σ Aquilae in the sky:
Visibility of σ Aquilae from your location
Digitized Sky Survey image of σ Aquilae
The image below is a photograph of σ Aquilae 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 Aquilae is 0.001 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.
Distance of σ Aquilae from the Sun and relative movement
σ Aquilae is distant 682.01 light years from the Sun and it is moving towards the Sun at the speed of 5 kilometers per second.
Spectral properties of σ Aquilae
σ Aquilae belongs to spectral class B3 and has a luminosity class of V corresponding to a main-sequence star.
The red dot in the diagram below shows where σ Aquilae is situated in the Hertzsprung–Russell diagram.
σ Aquilae star system properties
σ Aquilae is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the σ Aquilae double sysyem: