47 Cygni

47 Cygni is a multiple supergiant star in the constellation of Cygnus.

47 Cygni visual magnitude is 4.61. Because of its moderate brightness, 47 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 47 Cygni:

Color of 47 Cygni ⬤

Magnitude of 47 Cygni 4.61

Class Supergiant

VISIBILITY RIGHT NOW 47 Cygni is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 2°.

Celestial coordinates and finder chart of 47 Cygni

47 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 47 Cygni are provided in the following table:

Right Ascension J2000 20h 33m 54s

Declination J2000 +35° 15’ 02”

Galactic Longitude 75.43°

Galactic Latitude -2.93°

Constellation Cygnus

The simplified sky map below shows the position of 47 Cygni in the sky:

Simplified finder chart for 47 Cygni.

Visibility of 47 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 47 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: 54.7° RISE 18:53

Max altitude: 73.8° TRANSIT 5:04

Azimuth: 305.3° SET 15:11

RIGHT NOW 47 Cygni is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 47 Cygni

The image below is a photograph of 47 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 47 Cygni is 0.002 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 47 Cygni. The red arrow shows the motion of 47 Cygni during the next 100000 years (3.33 arcmin in Right Ascension and -10.00 arcmin in declination);

Distance of 47 Cygni from the Sun and relative movement

47 Cygni is distant 928.77 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 284.90 pc

Distance (light year) 928.77 ly

Heliocentric radial velocity -4 km/s

Proper Motion RA 0.002 arcsec/year

Proper Motion Dec -0.006 arcsec/year

Spectral properties of 47 Cygni

47 Cygni belongs to spectral class K2 and has a luminosity class of I corresponding to a supergiant star.

Absolute magnitude -2.66

Spectral Type K2I

Color Index (B-V) 1.6

Temperature of 47 Cygni 3649K

The red dot in the diagram below shows where 47 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 47 Cygni. Attribution: Richard Powell / CC BY-SA

47 Cygni star system properties

47 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 47 Cygni double sysyem:

Main star magnitude 4.61

Secondary star magnitude 10.21

Magnitude difference 5.6

Separation 117.6 arcsec

Alternative designations of 47 Cygni

Flamsteed designation 47 Cygni

Henry Draper Catalogue HD196093

SAO Catalogue SAO70203

Hipparcos Catalogue HIP101474

Durchmusterung Catalogue BD+34 4079

In Evidence

Other stars in Cygnus