τ1 Aquarii (tau1 Aquarii)
τ1 Aquarii is a multiple hypergiant star in the constellation of Aquarius.
τ1 Aquarii visual magnitude is 5.66. Because of its reltive faintness, τ1 Aquarii 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 τ1 Aquarii:
Celestial coordinates and finder chart of τ1 Aquarii
τ1 Aquarii 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 τ1 Aquarii are provided in the following table:
The simplified sky map below shows the position of τ1 Aquarii in the sky:
Visibility of τ1 Aquarii from your location
Digitized Sky Survey image of τ1 Aquarii
The image below is a photograph of τ1 Aquarii 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 τ1 Aquarii is 0.032 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of τ1 Aquarii from the Sun and relative movement
τ1 Aquarii is distant 259.76 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.
Spectral properties of τ1 Aquarii
τ1 Aquarii belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.
The red dot in the diagram below shows where τ1 Aquarii is situated in the Hertzsprung–Russell diagram.
τ1 Aquarii star system properties
τ1 Aquarii is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the τ1 Aquarii double sysyem: