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BF Cygni, Symbiotic Star

BF Cygni Facts

  • BF Cygni is a giant star that can be located in the constellation of Cygnus. The description is based on the spectral class.
  • BF Cygni is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (Bep+M5III) of the star, the star's colour is blue .
  • The star is calculated at being about 15749.08 light years away from us. Distance

Location of BF Cygni

The location of the giant 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 BF Cygni, the location is 19 23 53.5009795759 and +29 40 29.173306238 .

Radial Velocity and Proper Motion of BF 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 -5.54 milliarcseconds/year towards the north and -2.06 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 3.00000 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 BF Cygni

BF Cygni, Symbiotic Star Temperature and Colour

Based on the star's spectral type of Bep+M5III , BF Cygni, Symbiotic Star's colour and type is blue giant star. Based on the star's spectral, the stars temperature is between 10,000.00 and 30,000.00 degrees kelvin.

Distance to BF Cygni

The Parallax of the star is given as 0.20710 which gives a calculated distance to BF Cygni of 15749.08 light years from the Earth or 4828.59 parsecs. It is about 92,582,941,292,298,529 miles from Earth.

The star is roughly 995,961,240.84 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.

Travel Time to BF Cygni, Symbiotic Star

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Walking42,640,398,734,862.83
Car12088,013,291,162.09
Airbus A38073614,349,993,124.25
Speed of Sound (Mach 1)767.26913,765,178,756.67
Concorde (Mach 2)1,534.546,882,580,408.10
New Horizons Probe33,000 320,048,331.50
Speed of Light670,616,629.0015,749.08

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Additional BF Cygni Facts and Figures

Visual Facts


Primary / Proper / Traditional NameBF Cygni, Symbiotic Star
Spectral TypeBep+M5III
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeGiant Star
ColourBlue
GalaxyMilky Way
ConstellationCygnus
Right Ascension (R.A.)19 23 53.5009795759
Declination (Dec.)+29 40 29.173306238
Distance from Earth0.20710 Parallax (milliarcseconds)
 15749.08 Light Years
 4828.59 Parsecs
 995,961,240.84 Astronomical Units
Proper Motion Dec.-5.54100 milliarcseconds/year
Proper Motion RA.-2.05600 milliarcseconds/year
Radial Velocity3.00000 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Calculated Temperature Range10,000.00 - 30,000.00

Related Stars


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