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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 7:03  
clear_day Transit: 12:12  
SunsetSet: 17:22
sleep NighttimeWhat's Visible Now?
All Constellations » Aquarius » 

η Aquarii (eta Aquarii)

Altitude: -10.1°   Azimuth: 282.8°   Direction: West-North-West

η Aquarii is a sub-giant star in the constellation of Aquarius.

η Aquarii visual magnitude is 4.02. Because of its moderate brightness, η Aquarii 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 proper motion of η Aquarii is 0.091 arcsec per year in Right Ascension and -0.056 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of η Aquarii (eta Aquarii) star
DSS2 image of η Aquarii. The red arrow shows the motion of η Aquarii during the next 1000 years (1.52 arcmin in Right Ascension and -0.93 arcmin in declination);

Key facts about η Aquarii


η Aquarii (eta Aquarii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -10.1°
Azimuth: 282.8°
Direction: West-North-West

Celestial coordinates and finder chart of η Aquarii

η 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 η Aquarii are provided in the following table:

22h 35m 21s
-00° 07’ 02”

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

Finder chart η Aquarii (eta Aquarii) star
Simplified finder chart for η Aquarii (eta Aquarii).

Visibility of η Aquarii from your location

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

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

Azimuth: 90.1°
Max altitude: 38.4°
Azimuth: 269.9°

Distance of η Aquarii from the Sun and relative movement

η Aquarii is distant 183.46 light years from the Sun and it is moving towards the Sun at the speed of 8 kilometers per second.

56.27 pc
183.46 ly
-8 km/s
0.091 arcsec/year
-0.056 arcsec/year

Spectral properties of η Aquarii

η Aquarii belongs to spectral class B9 and has a luminosity class of IV corresponding to a sub-giant star.


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

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

Alternative designations of η Aquarii

η Aquarii
(eta Aquarii)