Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:46  
clear_day Transit: 12:56  
SunsetSet: 21:07 south
sunny DaytimeWhat's Visible Now
All Constellations » Aquarius » 

17 Aquarii

Altitude: -40.3°   Azimuth: 316.3°   Direction: North-West

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

17 Aquarii visual magnitude is 5.99. Because of its reltive faintness, 17 Aquarii 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 17 Aquarii:


17 Aquarii is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -40.3°
Azimuth: 316.3°
Direction: North-West

Celestial coordinates and finder chart of 17 Aquarii

17 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 17 Aquarii are provided in the following table:

21h 22m 56s
-09° 19’ 09”

The simplified sky map below shows the position of 17 Aquarii in the sky:

Finder chart 17 Aquarii star
Simplified finder chart for 17 Aquarii.

Visibility of 17 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 17 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: 99.3°
Max altitude: 29.2°
Azimuth: 260.7°
17 Aquarii is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 17 Aquarii

The image below is a photograph of 17 Aquarii 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 17 Aquarii is -0.025 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.

Image of 17 Aquarii star
DSS2 image of 17 Aquarii. The red arrow shows the motion of 17 Aquarii during the next 10000 years (-4.17 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of 17 Aquarii from the Sun and relative movement

17 Aquarii is distant 719.65 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

220.75 pc
719.65 ly
18 km/s
-0.025 arcsec/year
-0.026 arcsec/year

Spectral properties of 17 Aquarii

17 Aquarii belongs to spectral class M0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where 17 Aquarii is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 17 Aquarii. Attribution: Richard Powell / CC BY-SA

Alternative designations of 17 Aquarii