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public LocationGreenwich, United Kingdom
Sunrise: 4:53 
Transit: 12:55 
Sunset: 20:59
sunny   (Daytime)   What's Visible Now?

σ Aquarii (sigma Aquarii)

Altitude: -48.2°   Azimuth: 16.9°   Direction: North-North-East

σ Aquarii is a hypergiant star in the constellation of Aquarius.

σ Aquarii visual magnitude is 4.82. Because of its moderate brightness, σ Aquarii should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of σ Aquarii is 0.003 arcsec per year in Right Ascension and -0.03 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of σ Aquarii (sigma Aquarii) star
DSS2 image of σ Aquarii. The red arrow shows the motion of σ Aquarii during the next 10000 years (0.50 arcmin in Right Ascension and -5.00 arcmin in declination);

Key facts about σ Aquarii


σ Aquarii (sigma Aquarii) is below the horizon from Greenwich, United Kingdom.

Altitude: -48.2°
Azimuth: 16.9°
Direction: North-North-East

Celestial coordinates and finder chart of σ Aquarii

σ 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 σ Aquarii are provided in the following table:

22h 30m 38s
-10° 40’ 41”

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

Finder chart σ Aquarii (sigma Aquarii) star
Simplified finder chart for σ Aquarii (sigma Aquarii).

Visibility of σ Aquarii from your location

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

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

Azimuth: 100.7°
Max altitude: 27.8°
Azimuth: 259.3°

Distance of σ Aquarii from the Sun and relative movement

σ Aquarii is distant 265.26 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

81.37 pc
265.26 ly
11 km/s
0.003 arcsec/year
-0.03 arcsec/year

Spectral properties of σ Aquarii

σ Aquarii belongs to spectral class A0 and has a luminosity class of IV corresponding to a hypergiant star.


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

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

Alternative designations of σ Aquarii

σ Aquarii
(sigma Aquarii)