Wray 17-96 is a blue Luminous Blue Variable that can be located in the constellation of Sagittarius. The description is based on the spectral class. Wray 17-96 is not part of the constellation but is within the borders of the constellation.
According to a paper on I.O.P. (Institute of Physics), the star's distance from us is about 4.5Kpc or 4500 parsecs. It has a temperature of about 13,000k. It is one of the most luminous stars that we currently know about.
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 Wray 17-96, the location is 17h 41m 35.436 and -30° 06` 38.79 .
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 -4.60 miliarcseconds/year towards the north and -1.00 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.
Wray 17-96 has a spectral type of LBV_B[e]: D. This means the star is a blue Luminous Blue Variable.
|Primary / Proper / Traditional Name||Wray 17-96|
|Spectral Type||LBV_B[e]: D|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Luminous Blue Variable|
|Right Ascension (R.A.)||17h 41m 35.436|
|Declination (Dec.)||-30° 06` 38.79|
|Proper Motion Dec.||-4.60 milliarcseconds/year|
|Proper Motion RA.||-1.00 milliarcseconds/year|