30 Cygni

30 Cygni is a variable and multiple giant star in the constellation of Cygnus.

30 Cygni visual magnitude is 4.83. Because of its moderate brightness, 30 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 30 Cygni:

Color of 30 Cygni ⬤

Magnitude of 30 Cygni 4.83

Class Giant

VISIBILITY RIGHT NOW 30 Cygni is above the horizon from Greenwich, United Kingdom [change]. Altitude: 35°.

Celestial coordinates and finder chart of 30 Cygni

30 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 30 Cygni are provided in the following table:

Right Ascension J2000 20h 13m 18s

Declination J2000 +46° 48’ 56”

Galactic Longitude 82.71°

Galactic Latitude 6.87°

Constellation Cygnus

The simplified sky map below shows the position of 30 Cygni in the sky:

Simplified finder chart for 30 Cygni.

Visibility of 30 Cygni from your location

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

30 Cygni is circumpolar and transits at 07:59 UTC (altitude: 85.3°)

Digitized Sky Survey image of 30 Cygni

The image below is a photograph of 30 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 30 Cygni is 0.012 arcsec per year in Right Ascension and -0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 30 Cygni. The red arrow shows the motion of 30 Cygni during the next 10000 years (2.00 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of 30 Cygni from the Sun and relative movement

30 Cygni is distant 716.48 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

Distance (parsec) 219.78 pc

Distance (light year) 716.48 ly

Heliocentric radial velocity -26 km/s

Proper Motion RA 0.012 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of 30 Cygni

30 Cygni belongs to spectral class A5 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.88

Spectral Type A5III

Color Index (B-V) 0.09

Temperature of 30 Cygni 9125K

The red dot in the diagram below shows where 30 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 30 Cygni. Attribution: Richard Powell / CC BY-SA

30 Cygni star system properties

30 Cygni is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 30 Cygni double sysyem:

Main star magnitude 4.83

Secondary star magnitude 5.83

Magnitude difference 1

Separation 337.5 arcsec

Alternative designations of 30 Cygni

Flamsteed designation 30 Cygni

Henry Draper Catalogue HD192514

SAO Catalogue SAO49332

Hipparcos Catalogue HIP99639

Durchmusterung Catalogue BD+46 2881

General Catalogue of Variable Stars 12926

Aitken Double Star Catalogue ADS13554

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Other stars in Cygnus