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CY Cygni (S Star) Facts

CY Cygni Facts

CY Cygni's Alternative Names

The Id of the star in the Henry Draper catalogue is HD198164.

More details on objects' alternative names can be found at Star Names .

Location of CY Cygni

The location of the S-Type Star in the night sky is determined by the Right Ascension (R.A.) and Declination (Dec.), these are equivalent to the Longitude and Latitude on the Earth. The Right Ascension is how far expressed in time (hh:mm:ss) the star is along the celestial equator. If the R.A. is positive then its eastwards. The Declination is how far north or south the object is compared to the celestial equator and is expressed in degrees. For CY Cygni, the location is 20 46 50.2447575410 and +46 03 06.929987868 .

Radial Velocity and Proper Motion of CY Cygni

Proper Motion

All stars like planets orbit round a central spot, in the case of planets, its the central star such as the Sun. In the case of a star, its the galactic centre. The constellations that we see today will be different than they were 50,000 years ago or 50,000 years from now. Proper Motion details the movements of these stars and are measured in milliarcseconds. The star is moving -4.75 milliarcseconds/year towards the north and -3.88 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is 2.69 km/s . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties of CY Cygni

CY Cygni Colour and Temperature

CY Cygni has a spectral type of SC2_Zr0.

Distance to CY Cygni

The Parallax of the star is given as 0.63 which gives a calculated distance to CY Cygni of 5138.05 light years from the Earth or 1575.30 parsecs. It would take a spaceship travelling at the speed of light, 5138.05 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 324,926,685.16 Astronomical Units from the Earth/Sun give or take a few. An Astronomical Unit is the distance between Earth and the Sun. The number of A.U. is the number of times that the star is from the Earth compared to the Sun.

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Additional CY Cygni Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCY Cygni
Alternative NamesHD 198164
Spectral TypeSC2_Zr0
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeS-Type Star
GalaxyMilky Way
ConstellationCygnus
Right Ascension (R.A.)20 46 50.2447575410
Declination (Dec.)+46 03 06.929987868
Distance from Earth0.63 Parallax (milliarcseconds)
 5138.05 Light Years
 1575.30 Parsecs
 324,926,685.16 Astronomical Units
Proper Motion Dec.-4.75 milliarcseconds/year
Proper Motion RA.-3.88 milliarcseconds/year
Radial Velocity2.69 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=cy%20cygni

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