81 Aquarii is a giant star in the constellation of Aquarius.
81 Aquarii visual magnitude is 6.21. Because of its reltive faintness, 81 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 81 Aquarii:
Celestial coordinates and finder chart of 81 Aquarii
81 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 81 Aquarii are provided in the following table:
The simplified sky map below shows the position of 81 Aquarii in the sky:
Visibility of 81 Aquarii from your location
Digitized Sky Survey image of 81 Aquarii
The image below is a photograph of 81 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 81 Aquarii is -0.015 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of 81 Aquarii from the Sun and relative movement
81 Aquarii is distant 418.49 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.
Spectral properties of 81 Aquarii
81 Aquarii belongs to spectral class K5 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where 81 Aquarii is situated in the Hertzsprung–Russell diagram.