25 Cygni

Above the horizon. Rise: 23:30 | Tran: 10:18 | Set: 21:02

Alt: 60.70° Az: 105.01° Direction: East-South-East

25 Cygni is a variable sub-giant star of spectral class B3 in the constellation of Cygnus.

25 Cygni visual magnitude is 5.19. Because of its faintness, 25 Cygni is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 25 Cygni. The red arrow shows the motion of 25 Cygni during the next 100000 years (10.00 arcmin in Right Ascension and 1.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 00m 50s

Declination +37° 06’ 46”

Hour Angle 21h 34m 35s

Sidereal Time 17h 35m 25s

J2000

Right Ascension 19h 59m 55s

Declination +37° 02’ 34”

Galactic Coordinates

Galactic Longitude 73.07°

Galactic Latitude 3.76°

Finder Chart

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Finder chart for 25 Cygni.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.19

Class Sub-giant

Absolute magnitude -3.23

Spectral Type B3IV

Color Index (B-V) -0.17

Temperature 12902K

The red dot in the diagram below shows where 25 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 25 Cygni. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

25 Cygni is distant 1,574.88 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

Distance (parsec) 483.09

Distance (light year) 1,574.88

Radial Speed -4 km/s

Proper Motion RA 0.006 arcsec/y

Proper Motion Dec 0.001"/y

Alternative Designations

Flamsteed designation 25 Cygni

Henry Draper Catalogue HD189687

SAO Catalogue SAO69231

Hipparcos Catalogue HIP98425

Durchmusterung Catalogue BD+36 3806

FK5 Catalogue 3599

General Catalogue of Variable Stars V1746 Cyg

Visibility from Your Location

Today's 25 Cygni rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 52.9° RISE 23:30

Max altitude: 75.6° TRANSIT 10:18

Azimuth: 307.1° SET 21:02

Set Location

Other stars in Cygnus