Arkab Prior - β1 Sagittarii (beta1 Sagittarii)
Arkab Prior, also designated as β1 Sagittarii (beta1 Sagittarii), is a double main-sequence star in the constellation of Sagittarius.
Arkab Prior visual magnitude is 4.01. Because of its moderate brightness, Arkab Prior 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 Arkab Prior:
Celestial coordinates and finder chart of Arkab Prior
Arkab Prior is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Arkab Prior are provided in the following table:
The simplified sky map below shows the position of Arkab Prior in the sky:
Visibility of Arkab Prior from your location
Digitized Sky Survey image of Arkab Prior
The image below is a photograph of Arkab Prior 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 Arkab Prior is 0.009 arcsec per year in Right Ascension and -0.02 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of Arkab Prior from the Sun and relative movement
Arkab Prior is distant 378.19 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.
Spectral properties of Arkab Prior
Arkab Prior 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 Arkab Prior is situated in the Hertzsprung–Russell diagram.
Arkab Prior star system properties
Arkab Prior is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the Arkab Prior double sysyem: