47 Cygni

Above the horizon. Rise: 11:21 | Tran: 21:30 | Set: 7:42

Alt: 25.05° Az: 295.97° Direction: West-North-West

47 Cygni is a multiple supergiant star of spectral class K2 in the constellation of Cygnus.

47 Cygni visual magnitude is 4.61. Because of its moderate brightness, 47 Cygni is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

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);

Celestial Coordinates

Apparent

Right Ascension 20h 34m 51s

Declination +35° 20’ 12”

Hour Angle 06h 13m 06s

Sideral Time 02h 47m 58s

J2000

Right Ascension 20h 33m 54s

Declination +35° 15’ 02”

Galactic Coordinates

Galactic Longitude 75.43°

Galactic Latitude -2.93°

Finder Chart

Simplified finder chart for 47 Cygni.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.61

Class Supergiant

Absolute magnitude -2.66

Spectral Type K2I

Color Index (B-V) 1.6

Temperature 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

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

Distance, Radial Speed, Proper Motion

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

Distance (light year) 928.77

Radial Speed -4 km/s

Proper Motion RA 0.002 arcsec/y

Proper Motion Dec -0.006"/y

Alternative Designations

Flamsteed designation 47 Cygni

Henry Draper Catalogue HD196093

SAO Catalogue SAO70203

Hipparcos Catalogue HIP101474

Durchmusterung Catalogue BD+34 4079

Visibility from Your Location

Today's 47 Cygni rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 54.7° RISE 11:21

Max altitude: 73.9° TRANSIT 21:30

Azimuth: 305.3° SET 7:42

Name:	Greenwich, UK
Latitude:	51° 28' 48.0" N
Longitude:	0° 0' 0.0" E
Timezone:	Europe/London

Location

Other stars in Cygnus