θ2 Sagittarii (theta2 Sagittarii)
θ2 Sagittarii is a multiple sub-giant star in the constellation of Sagittarius.
θ2 Sagittarii visual magnitude is 5.3. Because of its reltive faintness, θ2 Sagittarii 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 θ2 Sagittarii:
Celestial coordinates and finder chart of θ2 Sagittarii
θ2 Sagittarii 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 θ2 Sagittarii are provided in the following table:
The simplified sky map below shows the position of θ2 Sagittarii in the sky:
Visibility of θ2 Sagittarii from your location
Digitized Sky Survey image of θ2 Sagittarii
The image below is a photograph of θ2 Sagittarii 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 θ2 Sagittarii is 0.1 arcsec per year in Right Ascension and -0.075 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of θ2 Sagittarii from the Sun and relative movement
θ2 Sagittarii is distant 156.66 light years from the Sun and it is moving towards the Sun at the speed of 18 kilometers per second.
Spectral properties of θ2 Sagittarii
θ2 Sagittarii belongs to spectral class A4 and has a luminosity class of IV corresponding to a sub-giant star.
The red dot in the diagram below shows where θ2 Sagittarii is situated in the Hertzsprung–Russell diagram.
θ2 Sagittarii star system properties
θ2 Sagittarii 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 θ2 Sagittarii double sysyem: