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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cygnus » 

μ1 Cygni (mu1 Cygni)

Altitude: 59.9°   Azimuth: 231.0°   Direction: South-West

μ1 Cygni is a multiple main-sequence star in the constellation of Cygnus.

μ1 Cygni visual magnitude is 4.73. Because of its moderate brightness, μ1 Cygni 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 μ1 Cygni:


μ1 Cygni (mu1 Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 59.9°
Azimuth: 231.0°
Direction: South-West

Celestial coordinates and finder chart of μ1 Cygni

μ1 Cygni 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 μ1 Cygni are provided in the following table:

21h 44m 08s
+28° 44’ 34”

The simplified sky map below shows the position of μ1 Cygni in the sky:

Finder chart μ1 Cygni (mu1 Cygni) star
Simplified finder chart for μ1 Cygni (mu1 Cygni).

Visibility of μ1 Cygni 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 μ1 Cygni (mu1 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: 61.3°
Max altitude: 67.3°
Azimuth: 298.7°

Digitized Sky Survey image of μ1 Cygni

The image below is a photograph of μ1 Cygni 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 μ1 Cygni is 0.292 arcsec per year in Right Ascension and -0.241 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of μ1 Cygni (mu1 Cygni) star
DSS2 image of μ1 Cygni. The red arrow shows the motion of μ1 Cygni during the next 1000 years (4.87 arcmin in Right Ascension and -4.02 arcmin in declination);

Distance of μ1 Cygni from the Sun and relative movement

μ1 Cygni is distant 73.03 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

22.40 pc
73.03 ly
18 km/s
0.292 arcsec/year
-0.241 arcsec/year

Spectral properties of μ1 Cygni

μ1 Cygni belongs to spectral class F6 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where μ1 Cygni is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of μ1 Cygni. Attribution: Richard Powell / CC BY-SA

μ1 Cygni star system properties

μ1 Cygni is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the μ1 Cygni double sysyem:

2 arcsec

Alternative designations of μ1 Cygni

μ1 Cygni
(mu1 Cygni)
Gl 836.6A