BP Vulpeculae
BP Vulpeculae Facts
BP Vulpeculae's star type is eclipsing star that can be located in the constellation of Vulpecula. The description is based on the spectral class.
BP Vulpeculae is not part of the constellation outline but is within the borders of the constellation.
BP Vulpeculae's Alternative Names
BP Vulpeculae has alternative name(s) :- BP Vul, BP Vul.
Location of BP Vulpeculae
The location of the 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 BP Vulpeculae, the location is 20h 25m 33.25 and +21° 02` 17.9 .
Radial Velocity and Proper Motion of BP Vulpeculae
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 9.46 ± 0.93 milliarcseconds/year towards the north and 4.09 ± 1.35 milliarcseconds/year east if we saw them in the horizon.
Physical Properties (Colour, Temperature) of BP Vulpeculae
BP Vulpeculae Colour and Temperature
BP Vulpeculae has a spectral type of A7. This means the star is a blue star. The star has a B-V Colour Index of 0.25 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,058 Kelvin.
BP Vulpeculae Radius
BP Vulpeculae Apparent and Absolute Magnitudes
BP Vulpeculae has an apparent magnitude of 9.82 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of -0.12 If you used the 2007 Parallax value, you would get an absolute magnitude of 0.88. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.
Distance to BP Vulpeculae
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.03 which gave the calculated distance to BP Vulpeculae as 3166.63 light years away from Earth or 970.87 parsecs. It would take a spaceship travelling at the speed of light, 3166.63 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
In 2007, Hipparcos data was revised with a new parallax of 1.63 which put BP Vulpeculae at a distance of 2001.00 light years or 613.50 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.
Variable Type of BP Vulpeculae
The star is a eclipsing Beta Persei (Algol)/ variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. BP Vulpeculae brightness ranges from a magnitude of 10.680 to a magnitude of 9.710 over its variable period. The smaller the magnitude, the brighter the star.
Additional BP Vulpeculae Facts and Figures
Primary / Proper / Traditional Name BP Vulpeculae
Alternative Names BP Vul, HD 352179, HIP 100745, BD+20 4557, BP Vul
Absolute Magnitude -0.12 / 0.88
Galactic Latitude -9.67 degrees
Proper Motion Dec. 9.46 ± 0.93 milliarcseconds/year
Proper Motion RA. 4.09 ± 1.35 milliarcseconds/year
Variable Star Class Eclipsing
Variable Star Type Beta Persei (Algol)/
3 Cygni
BD+23 3912
BN Vulpeculae
BR Vulpeculae
BW Vulpeculae