η Aquilae (eta Aquilae)
η Aquilae is a variable supergiant star in the constellation of Aquila.
η Aquilae visual magnitude is 3.9. Because of its moderate brightness, η Aquilae 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 η Aquilae:
Celestial coordinates and finder chart of η Aquilae
η Aquilae 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 η Aquilae are provided in the following table:
The simplified sky map below shows the position of η Aquilae in the sky:
Visibility of η Aquilae from your location
Digitized Sky Survey image of η Aquilae
The image below is a photograph of η Aquilae 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 η Aquilae is 0.011 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.
Distance of η Aquilae from the Sun and relative movement
η Aquilae is distant 1,172.66 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.
Spectral properties of η Aquilae
η Aquilae belongs to spectral class F6 and has a luminosity class of I corresponding to a supergiant star.
The red dot in the diagram below shows where η Aquilae is situated in the Hertzsprung–Russell diagram.