η Delphini (eta Delphini)

η Delphini is a variable sub-giant star in the constellation of Delphinus.

η Delphini visual magnitude is 5.38. Because of its reltive faintness, η Delphini 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 η Delphini:

Celestial coordinates and finder chart of η Delphini

η Delphini 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 Delphini are provided in the following table:

The simplified sky map below shows the position of η Delphini in the sky:

Visibility of η Delphini from your location

Today's η Delphini (eta Delphini) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Digitized Sky Survey image of η Delphini

The image below is a photograph of η Delphini 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 Delphini is 0.072 arcsec per year in Right Ascension and 0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Distance of η Delphini from the Sun and relative movement

η Delphini is distant 172.94 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

Spectral properties of η Delphini

η Delphini belongs to spectral class A3 and has a luminosity class of IV corresponding to a sub-giant star.

The red dot in the diagram below shows where η Delphini is situated in the Hertzsprung–Russell diagram.

Alternative designations of η Delphini