ω1 Cygni (omega1 Cygni)

Altitude: 17.5° Azimuth: 330.9° Direction: North-North-West

ω1 Cygni is a multiple sub-giant star in the constellation of Cygnus.

ω1 Cygni visual magnitude is 4.95. Because of its moderate brightness, ω1 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 ω1 Cygni:

Color of ω1 Cygni ⬤

Magnitude of ω1 Cygni 4.95

Class Sub-giant

VISIBILITY RIGHT NOW

ω1 Cygni (omega1 Cygni) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 17.5°
Azimuth: 330.9°
Direction: North-North-West

Celestial coordinates and finder chart of ω1 Cygni

ω1 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 ω1 Cygni are provided in the following table:

Right Ascension J2000 20h 30m 03s

Declination J2000 +48° 57’ 06”

Galactic Longitude 86.07°

Galactic Latitude 5.74°

Constellation Cygnus

The simplified sky map below shows the position of ω1 Cygni in the sky:

Finder chart ω1 Cygni (omega1 Cygni) star

Simplified finder chart for ω1 Cygni (omega1 Cygni).

Visibility of ω1 Cygni from your location

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

ω1 Cygni (omega1 Cygni) is circumpolar and transits at 03:25 UTC (altitude: 87.5°)

Digitized Sky Survey image of ω1 Cygni

The image below is a photograph of ω1 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 ω1 Cygni is 0.013 arcsec per year in Right Ascension and 0.008 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of ω1 Cygni. The red arrow shows the motion of ω1 Cygni during the next 10000 years (2.17 arcmin in Right Ascension and 1.33 arcmin in declination);

Distance of ω1 Cygni from the Sun and relative movement

ω1 Cygni is distant 869.33 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

Distance (parsec) 266.67 pc

Distance (light year) 869.33 ly

Heliocentric radial velocity -22 km/s

Proper Motion RA 0.013 arcsec/year

Proper Motion Dec 0.008 arcsec/year

Spectral properties of ω1 Cygni

ω1 Cygni belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.

Absolute magnitude -2.18

Spectral Type B2IV

Color Index (B-V) -0.09

Temperature of ω1 Cygni 11407K

The red dot in the diagram below shows where ω1 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of ω1 Cygni. Attribution: Richard Powell / CC BY-SA

ω1 Cygni star system properties

ω1 Cygni 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 ω1 Cygni double sysyem:

Main star magnitude 4.95

Secondary star magnitude 11.95

Magnitude difference 7

Separation 56.3 arcsec

Alternative designations of ω1 Cygni

Bayer designation ω1 Cygni
(omega1 Cygni)

Flamsteed designation 45 Cygni

Henry Draper Catalogue HD195556

SAO Catalogue SAO49712

Hipparcos Catalogue HIP101138

Durchmusterung Catalogue BD+48 3142

FK5 Catalogue 3641

Aitken Double Star Catalogue ADS13932

In Evidence

Other stars in Cygnus