μ2 Cygni (mu2 Cygni)

μ2 Cygni is a multiple main-sequence star in the constellation of Cygnus.

μ2 Cygni visual magnitude is 6.08. Because of its reltive faintness, μ2 Cygni 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 μ2 Cygni:

Color of μ2 Cygni ⬤

Magnitude of μ2 Cygni 6.08

Class Main-sequence

VISIBILITY RIGHT NOW μ2 Cygni (mu2 Cygni) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 31°.

Celestial coordinates and finder chart of μ2 Cygni

μ2 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 μ2 Cygni are provided in the following table:

Right Ascension J2000 21h 44m 08s

Declination J2000 +28° 44’ 35”

Galactic Longitude 80.58°

Galactic Latitude -18.34°

Constellation Cygnus

The simplified sky map below shows the position of μ2 Cygni in the sky:

Simplified finder chart for μ2 Cygni (mu2 Cygni).

Visibility of μ2 Cygni from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's μ2 Cygni (mu2 Cygni) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 61.3° RISE 1:14

Max altitude: 67.3° TRANSIT 10:06

Azimuth: 298.7° SET 18:57

RIGHT NOW μ2 Cygni (mu2 Cygni) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of μ2 Cygni

The image below is a photograph of μ2 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 μ2 Cygni is 0.231 arcsec per year in Right Ascension and -0.219 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of μ2 Cygni. The red arrow shows the motion of μ2 Cygni during the next 1000 years (3.85 arcmin in Right Ascension and -3.65 arcmin in declination);

Distance of μ2 Cygni from the Sun and relative movement

μ2 Cygni is distant 73.03 light years from the Sun and it is moving far from the Sun at the speed of 17 kilometers per second.

Distance (parsec) 22.40 pc

Distance (light year) 73.03 ly

Heliocentric radial velocity 17 km/s

Proper Motion RA 0.231 arcsec/year

Proper Motion Dec -0.219 arcsec/year

Spectral properties of μ2 Cygni

μ2 Cygni belongs to spectral class G2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 4.33

Spectral Type G2V

Color Index (B-V) 0.36

Temperature of μ2 Cygni 7101K

The red dot in the diagram below shows where μ2 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of μ2 Cygni. Attribution: Richard Powell / CC BY-SA

μ2 Cygni star system properties

μ2 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 μ2 Cygni double sysyem:

Main star magnitude 6.08

Secondary star magnitude 7.38

Magnitude difference 1.3

Separation 2 arcsec

Alternative designations of μ2 Cygni

Bayer designation μ2 Cygni
(mu2 Cygni)

Flamsteed designation 78 Cygni

Henry Draper Catalogue HD206827

SAO Catalogue SAO89939

Durchmusterung Catalogue BD+28 4169

Gliese Catalogue Gl 836.6B

Aitken Double Star Catalogue ADS15270

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