FU Orionis is a blue to white supergiant star that can be located in the constellation of Orion. The description is based on the spectral class.
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 star is compared to the celestial equator and is expressed in degrees. For FU Orionis, the location is 05h 45m 22.3650 and +09° 04` 12.288 .
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 -2.26 miliarcseconds/year towards the north and 2.29 miliarcseconds/year east if we saw them in the horizon. . 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.
FU Orionis has a spectral type of F0Iab C. This means the star is a blue to white supergiant star.
The Parallax of the star is given as 2.83 which gives a calculated distance to FU Orionis of 1152.52 light years from the Earth or 353.36 parsecs. It would take a spaceship travelling at the speed of light, 1152.52 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
|Primary / Proper / Traditional Name||FU Orionis|
|Spectral Type||F0Iab C|
|Multiple Star System||No / Unknown|
|Star Type||very luminous Supergiant Star|
|Colour||blue to white|
|Right Ascension (R.A.)||05h 45m 22.3650|
|Declination (Dec.)||+09° 04` 12.288|
|Distance from Earth||2.83 Parallax (milliarcseconds)|
|1152.52 Light Years|
|Proper Motion Dec.||-2.26 milliarcseconds/year|
|Proper Motion RA.||2.29 milliarcseconds/year|