V453 Scorpii is a blue eclipsing supergiant star that can be located in the constellation of Scorpius. The star can not be seen by the naked eye, you need a telescope to see it.
HIP87810 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD163181.
V453 Scorpii has alternative name(s) :- , V453 Sco.
More details on star alternative names can be found at Star Names.
The location of the star in the galaxy 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 star is compared to the celestial equator and is expressed in degrees. For V453 Scorpii, the location is 17h 56m 16.08 and -32° 28` 30.0 .
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 -2.99 ± 0.38 miliarcseconds/year towards the north and 0.35 ± 0.58 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is -43.00000 km/s with an error of about 1.40 km/s .
V453 Scorpii has a spectral type of O9.5Ia/ab. This means the star is a blue supergiant star. The star has a B-V Colour Index of 0.42 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,335 Kelvin. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.
V453 Scorpii has an apparent magnitude of 6.59 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 If you used the 2007 Parallax value, you would get an absolute magnitude of -5.45. 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.
Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -2.08 which gave the calculated distance to V453 Scorpii as -1568.09 light years away from Earth or -480.77 parsecs. It would take a spaceship travelling at the speed of light, -1568.09 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 0.39 which put V453 Scorpii at a distance of 8363.16 light years or 2564.10 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.
The star is a eclipsing Beta Lyrae (Sheliak)/Detached System with one or both giant and supergiant components 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. V453 Scorpii brightness ranges from a magnitude of 6.870 to a magnitude of 6.480 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 12.0 days (variability).
|Alternative Names||HD 163181, HIP 87810, V453 Sco|
|Star Type||very luminous Supergiant Star|
|Visual / Apparent Magnitude||6.59|
|Naked Eye Visible||Requires a 7x50 Binoculars - Magnitudes|
|Right Ascension (R.A.)||17h 56m 16.08|
|Declination (Dec.)||-32° 28` 30.0|
|Galactic Latitude||-3.77 degrees|
|Galactic Longitude||358.13 degrees|
|1997 Distance from Earth||-2.08 Parallax (milliarcseconds)|
|-1568.09 Light Years|
|2007 Revised Distance from Earth||0.39 Parallax (milliarcseconds)|
|8363.16 Light Years|
|Proper Motion Dec.||-2.99 ± 0.38 milliarcseconds/year|
|Proper Motion RA.||0.35 ± 0.58 milliarcseconds/year|
|Radial Velocity||-43.00 ± 1.40 km/s|
|Variable Star Class||Eclipsing|
|Variable Star Type||Beta Lyrae (Sheliak)/Detached System with one or both giant and supergiant components|
|Mean Variability Period in Days||12.006|
|Variable Magnitude Range (Brighter - Dimmer)||6.480 - 6.870|
|Calculated Effective Temperature||6,335 Kelvin|
The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.
|Proper Motion mas/yr|
|H.D. Id||B.D. Id||Star Code||Magnitude||R.A.||Dec.||Spectrum||Colour||Year|