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KSI Cephei B (Companion Star) Facts

KSI Cephei B Facts

KSI Cephei B's Alternative Names

The Id of the star in the Henry Draper catalogue is HD209791.

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

Location of KSI Cephei B

The location of the multiple star system 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 KSI Cephei B, the location is 22 03 46.2173563855 and +64 37 41.464624020 .

Radial Velocity and Proper Motion of KSI Cephei B

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 81.99 milliarcseconds/year towards the north and 202.02 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 -6.20 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.

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Additional KSI Cephei B Facts and Figures

Visual Facts


Primary / Proper / Traditional NameKSI Cephei B
Alternative NamesHD 209791
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeMultiple Star System
GalaxyMilky Way
ConstellationCepheus
Right Ascension (R.A.)22 03 46.2173563855
Declination (Dec.)+64 37 41.464624020
Distance from Earth32.12 Parallax (milliarcseconds)
 101.55 Light Years
 31.14 Parsecs
 6,423,041.31 Astronomical Units
Proper Motion Dec.81.99 milliarcseconds/year
Proper Motion RA.202.02 milliarcseconds/year
Radial Velocity-6.20 km/s
Associated / Clustered StarsKurhah

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=KSI%20Cepheus%20B

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