ρ1 Sagittarii (rho1 Sagittarii)
ρ1 Sagittarii is a variable and double hypergiant star in the constellation of Sagittarius.
ρ1 Sagittarii visual magnitude is 3.93. Because of its moderate brightness, ρ1 Sagittarii 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 ρ1 Sagittarii:
Celestial coordinates and finder chart of ρ1 Sagittarii
ρ1 Sagittarii 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 ρ1 Sagittarii are provided in the following table:
The simplified sky map below shows the position of ρ1 Sagittarii in the sky:
Visibility of ρ1 Sagittarii from your location
Digitized Sky Survey image of ρ1 Sagittarii
The image below is a photograph of ρ1 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 ρ1 Sagittarii is -0.024 arcsec per year in Right Ascension and 0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of ρ1 Sagittarii from the Sun and relative movement
ρ1 Sagittarii is distant 121.69 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.
Spectral properties of ρ1 Sagittarii
ρ1 Sagittarii belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.
The red dot in the diagram below shows where ρ1 Sagittarii is situated in the Hertzsprung–Russell diagram.
ρ1 Sagittarii star system properties
ρ1 Sagittarii 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 ρ1 Sagittarii double sysyem: