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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:49  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Aquila » 

Alshain - β Aquilae (beta Aquilae)

Altitude: 35.1°   Azimuth: 228.5°   Direction: South-West

Alshain, also designated as β Aquilae (beta Aquilae), is a variable and multiple sub-giant star in the constellation of Aquila.

Alshain visual magnitude is 3.71. Because of its moderate brightness, Alshain 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 table below summarizes the key facts about Alshain:


Alshain - β Aquilae (beta Aquilae) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 35.1°
Azimuth: 228.5°
Direction: South-West

Celestial coordinates and finder chart of Alshain

Alshain 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 Alshain are provided in the following table:

19h 55m 18s
+06° 24’ 24”

The simplified sky map below shows the position of Alshain in the sky:

Finder chart Alshain - β Aquilae (beta Aquilae) star
Simplified finder chart for Alshain - β Aquilae (beta Aquilae).

Visibility of Alshain 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 Alshain - β Aquilae (beta 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: 83.6°
Max altitude: 44.9°
Azimuth: 276.4°

Digitized Sky Survey image of Alshain

The image below is a photograph of Alshain 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 Alshain is 0.048 arcsec per year in Right Ascension and -0.482 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Alshain - β Aquilae (beta Aquilae) star
DSS2 image of Alshain. The red arrow shows the motion of Alshain during the next 1000 years (0.80 arcmin in Right Ascension and -8.03 arcmin in declination);

Distance of Alshain from the Sun and relative movement

Alshain is distant 44.69 light years from the Sun and it is moving towards the Sun at the speed of 40 kilometers per second.

13.71 pc
44.69 ly
-40 km/s
0.048 arcsec/year
-0.482 arcsec/year

Spectral properties of Alshain

Alshain belongs to spectral class G8 and has a luminosity class of IV corresponding to a sub-giant star.


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

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

Alshain star system properties

Alshain 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 Alshain double sysyem:

175 arcsec

Alternative designations of Alshain

β Aquilae
(beta Aquilae)
Gl 771 A