79 Cygni

79 Cygni is a multiple hypergiant star in the constellation of Cygnus.

79 Cygni visual magnitude is 5.65. Because of its reltive faintness, 79 Cygni should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 79 Cygni:

Color of 79 Cygni ⬤

Magnitude of 79 Cygni 5.65

Class Hypergiant

VISIBILITY RIGHT NOW 79 Cygni is above the horizon from Greenwich, United Kingdom [change]. Altitude: 74°.

Celestial coordinates and finder chart of 79 Cygni

79 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 79 Cygni are provided in the following table:

Right Ascension J2000 21h 43m 25s

Declination J2000 +38° 17’ 02”

Galactic Longitude 87.11°

Galactic Latitude -11.18°

Constellation Cygnus

The simplified sky map below shows the position of 79 Cygni in the sky:

Simplified finder chart for 79 Cygni.

Visibility of 79 Cygni from your location

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

Today's 79 Cygni rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 51.7° RISE 22:35

Max altitude: 76.8° TRANSIT 10:05

Azimuth: 308.3° SET 21:31

RIGHT NOW 79 Cygni is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of 79 Cygni

The image below is a photograph of 79 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 79 Cygni is 0.036 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 79 Cygni. The red arrow shows the motion of 79 Cygni during the next 10000 years (6.00 arcmin in Right Ascension and 0.67 arcmin in declination);

Distance of 79 Cygni from the Sun and relative movement

79 Cygni is distant 272.35 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

Distance (parsec) 83.54 pc

Distance (light year) 272.35 ly

Heliocentric radial velocity -23 km/s

Proper Motion RA 0.036 arcsec/year

Proper Motion Dec 0.004 arcsec/year

Spectral properties of 79 Cygni

79 Cygni belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 1.04

Spectral Type A0V

Color Index (B-V) 0

Temperature of 79 Cygni 10125K

The red dot in the diagram below shows where 79 Cygni is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 79 Cygni. Attribution: Richard Powell / CC BY-SA

79 Cygni star system properties

79 Cygni is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 79 Cygni double sysyem:

Main star magnitude 5.65

Secondary star magnitude 6.95

Magnitude difference 1.3

Separation 151.2 arcsec

Alternative designations of 79 Cygni

Flamsteed designation 79 Cygni

Henry Draper Catalogue HD206774

SAO Catalogue SAO71643

Hipparcos Catalogue HIP107253

Durchmusterung Catalogue BD+37 4408

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Other stars in Cygnus