ω2 Cygni (omega2 Cygni)

Altitude: 10.8° Azimuth: 355.8° Direction: North

ω2 Cygni is a variable and double giant star in the constellation of Cygnus.

ω2 Cygni visual magnitude is 5.44. Because of its reltive faintness, ω2 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 ω2 Cygni:

Color of ω2 Cygni ⬤

Magnitude of ω2 Cygni 5.44

Class Giant

VISIBILITY RIGHT NOW

ω2 Cygni (omega2 Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 10.8°
Azimuth: 355.8°
Direction: North

Celestial coordinates and finder chart of ω2 Cygni

ω2 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 ω2 Cygni are provided in the following table:

Right Ascension J2000 20h 31m 18s

Declination J2000 +49° 13’ 13”

Galactic Longitude 86.41°

Galactic Latitude 5.73°

Constellation Cygnus

The simplified sky map below shows the position of ω2 Cygni in the sky:

Finder chart ω2 Cygni (omega2 Cygni) star

Simplified finder chart for ω2 Cygni (omega2 Cygni).

Visibility of ω2 Cygni from your location

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

ω2 Cygni (omega2 Cygni) is circumpolar and transits at 15:50 UTC (altitude: 87.7°)

Digitized Sky Survey image of ω2 Cygni

The image below is a photograph of ω2 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 ω2 Cygni is 0.012 arcsec per year in Right Ascension and -0.028 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of ω2 Cygni. The red arrow shows the motion of ω2 Cygni during the next 10000 years (2.00 arcmin in Right Ascension and -4.67 arcmin in declination);

Distance of ω2 Cygni from the Sun and relative movement

ω2 Cygni is distant 403.97 light years from the Sun and it is moving towards the Sun at the speed of 64 kilometers per second.

Distance (parsec) 123.92 pc

Distance (light year) 403.97 ly

Heliocentric radial velocity -64 km/s

Proper Motion RA 0.012 arcsec/year

Proper Motion Dec -0.028 arcsec/year

Spectral properties of ω2 Cygni

ω2 Cygni belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -0.03

Spectral Type M2III

Color Index (B-V) 1.55

Temperature of ω2 Cygni 3720K

The red dot in the diagram below shows where ω2 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ω2 Cygni. Attribution: Richard Powell / CC BY-SA

ω2 Cygni star system properties

ω2 Cygni 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 ω2 Cygni double sysyem:

Main star magnitude 5.44

Secondary star magnitude 10.14

Magnitude difference 4.7

Separation 56.8 arcsec

Alternative designations of ω2 Cygni

Bayer designation ω2 Cygni
(omega2 Cygni)

Flamsteed designation 46 Cygni

Henry Draper Catalogue HD195774

SAO Catalogue SAO49741

Hipparcos Catalogue HIP101243

Durchmusterung Catalogue BD+48 3154

General Catalogue of Variable Stars 13128

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