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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
SunriseRise: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
sunny DaytimeWhat's Visible Now?
All Constellations » Cygnus » 

Aljanah - ε Cygni (epsilon Cygni)

Altitude: 43.8°   Azimuth: 272.2°   Direction: West

Aljanah, also designated as ε Cygni (epsilon Cygni), is a multiple hypergiant star in the constellation of Cygnus.

Aljanah visual magnitude is 2.46, making it the 89th brightest star in the sky. Thanks to its high brightness, Aljanah is clearly visible when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

The proper motion of Aljanah is 0.356 arcsec per year in Right Ascension and 0.328 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Aljanah - ε Cygni (epsilon Cygni) star
DSS2 image of Aljanah. The red arrow shows the motion of Aljanah during the next 1000 years (5.93 arcmin in Right Ascension and 5.47 arcmin in declination);

Key facts about Aljanah

2.46
Hypergiant

Aljanah - ε Cygni (epsilon Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 43.8°
Azimuth: 272.2°
Direction: West

Celestial coordinates and finder chart of Aljanah

Aljanah is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Aljanah are provided in the following table:

20h 46m 12s
+33° 58’ 13”
75.94°
-5.71°
Cygnus

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

Finder chart Aljanah - ε Cygni (epsilon Cygni) star
Simplified finder chart for Aljanah - ε Cygni (epsilon Cygni).

Visibility of Aljanah 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 Aljanah - ε Cygni (epsilon Cygni) 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: 56.0°
Max altitude: 72.5°
Azimuth: 304.0°

Distance of Aljanah from the Sun and relative movement

Aljanah is distant 72.03 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

22.09 pc
72.03 ly
-11 km/s
0.356 arcsec/year
0.328 arcsec/year

Spectral properties of Aljanah

Aljanah belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

0.74
K0III
4672K

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

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

Aljanah star system properties

Aljanah 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 Aljanah double sysyem:

2.46
11.76
9.3
54.9 arcsec

Alternative designations of Aljanah

Aljanah
ε Cygni
(epsilon Cygni)
SAO70474
SAO70474
Gl 806.1A