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public LocationGreenwich, UK
Sunrise: 4:43 
Transit: 13:01 
Sunset: 21:18
wb_twilight   (Civil Twilight)   What's Visible Now?
All Constellations » Aquarius » 

1 Aquarii

Above the horizon.  Rise: 21:20 | Tran: 3:24 | Set: 9:24
Altitude: 38.1°   Azimuth: 194.9°   Direction: South-South-West

1 Aquarii is a multiple giant star of spectral class K1 in the constellation of Aquarius.

1 Aquarii visual magnitude is 5.16. Because of its faintness, 1 Aquarii is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Celestial coordinates and finder chart of 1 Aquarii

Finder chart 1 Aquarii star
Simplified finder chart for 1 Aquarii.

1 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 1 Aquarii are provided in the following table:

20h 39m 24s
+00° 29’ 11”
Image of 1 Aquarii star
DSS2 image of 1 Aquarii. The red arrow shows the motion of 1 Aquarii during the next 1000 years (1.68 arcmin in Right Ascension and -0.25 arcmin in declination);

Key facts about 1 Aquarii


and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 1 Aquarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 1 Aquarii. Attribution: Richard Powell / CC BY-SA

1 Aquarii star system properties

1 Aquarii is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 1 Aquarii double sysyem:

59.7 arcsec

Distance of 1 Aquarii from the Sun and relative movement

1 Aquarii is distant 244.56 light years from the Sun and it is moving towards the Sun at the speed of 43 kilometers per second.

75.02 pc
244.56 ly
-43 km/s
0.101 arcsec/year
-0.015 arcsec/year

Alternative designations of 1 Aquarii


Visibility of 1 Aquarii from your location

Today's 1 Aquarii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 89.5°
Max altitude: 39.0°
Azimuth: 270.5°