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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Aquila » 

23 Aquilae

Altitude: -21.2°   Azimuth: 301.4°   Direction: West-North-West

23 Aquilae is a variable and multiple bright giant star in the constellation of Aquila.

23 Aquilae visual magnitude is 5.1. Because of its reltive faintness, 23 Aquilae 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 23 Aquilae:

Bright giant

23 Aquilae is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -21.2°
Azimuth: 301.4°
Direction: West-North-West

Celestial coordinates and finder chart of 23 Aquilae

23 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 23 Aquilae are provided in the following table:

19h 18m 32s
+01° 05’ 07”

The simplified sky map below shows the position of 23 Aquilae in the sky:

Finder chart 23 Aquilae star
Simplified finder chart for 23 Aquilae.

Visibility of 23 Aquilae 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 23 Aquilae 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: 88.9°
Max altitude: 39.6°
Azimuth: 271.1°

Digitized Sky Survey image of 23 Aquilae

The image below is a photograph of 23 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 23 Aquilae is 0.01 arcsec per year in Right Ascension and 0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 23 Aquilae star
DSS2 image of 23 Aquilae. The red arrow shows the motion of 23 Aquilae during the next 10000 years (1.67 arcmin in Right Ascension and 3.17 arcmin in declination);

Distance of 23 Aquilae from the Sun and relative movement

23 Aquilae is distant 380.84 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

116.82 pc
380.84 ly
-24 km/s
0.01 arcsec/year
0.019 arcsec/year

Spectral properties of 23 Aquilae

23 Aquilae belongs to spectral class K2 and has a luminosity class of II corresponding to a bright giant star.


The red dot in the diagram below shows where 23 Aquilae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 23 Aquilae. Attribution: Richard Powell / CC BY-SA

23 Aquilae star system properties

23 Aquilae is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the 23 Aquilae double sysyem:

3.1 arcsec

Alternative designations of 23 Aquilae