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:

Color of η Aquilae ⬤

Magnitude of η Aquilae 3.9

Class Supergiant

VISIBILITY RIGHT NOW η Aquilae (eta Aquilae) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 39°.

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:

Right Ascension J2000 19h 52m 28s

Declination J2000 +01° 00’ 20”

Galactic Longitude 40.93°

Galactic Latitude -13.07°

Constellation Aquila

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

Finder chart η Aquilae (eta Aquilae) star

Simplified finder chart for η Aquilae (eta Aquilae).

Visibility of η Aquilae from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 89.0° RISE 1:43

Max altitude: 39.5° TRANSIT 7:46

Azimuth: 271.0° SET 13:49

RIGHT NOW η Aquilae (eta Aquilae) is above the horizon from Greenwich, United Kingdom

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.

DSS2 image of η Aquilae. The red arrow shows the motion of η Aquilae during the next 10000 years (1.83 arcmin in Right Ascension and -1.17 arcmin in declination);

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.

Distance (parsec) 359.71 pc

Distance (light year) 1,172.66 ly

Heliocentric radial velocity -15 km/s

Proper Motion RA 0.011 arcsec/year

Proper Motion Dec -0.007 arcsec/year

Spectral properties of η Aquilae

η Aquilae belongs to spectral class F6 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -3.88

Spectral Type F6I

Color Index (B-V) 0.89

Temperature of η Aquilae 5023K

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

H-R diagram showing the position of η Aquilae. Attribution: Richard Powell / CC BY-SA

Alternative designations of η Aquilae

Bayer designation η Aquilae
(eta Aquilae)

Flamsteed designation 55 Aquilae

Henry Draper Catalogue HD187929

SAO Catalogue SAO125159

Hipparcos Catalogue HIP97804

Durchmusterung Catalogue BD+00 4337

FK5 Catalogue 746

General Catalogue of Variable Stars Eta Aql

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Other stars in Aquila