More details on star alternative names can be found at Star Names .
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 WR 109, the location is 18 07 50.8974693468 and -35 10 25.119230585 .
The star is a Wolf-Rayet, a rare type of star of which not many are known. These stars are extremely luminous and large compared to our Sun. They live fast and die hard in a matter of millions not billions of years like our Sun. They exhaust their hydrogen supplies, turning to other gasses and expand outwards with massive solar winds, moving a step closer in the stellar evolution towards their death in a super or hypernova explosion.
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 -7.40 miliarcseconds/year towards the north and 1.37 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.
WR 109 has a spectral type of WN3C .
The Parallax of the star is given as 0.04 which gives a calculated distance to WR 109 of 75152.84 light years from the Earth or 23041.47 parsecs. It would take a spaceship travelling at the speed of light, 75152.84 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star is roughly 4,752,611,228.54 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.
|Primary / Proper / Traditional Name||WR 109|
|Alternative Names||WR 109|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Star Type||Wolf-Rayet star|
|Right Ascension (R.A.)||18 07 50.8974693468|
|Declination (Dec.)||-35 10 25.119230585|
|Distance from Earth||0.04 Parallax (milliarcseconds)|
|75152.84 Light Years|
|4,752,611,228.54 Astronomical Units|
|Proper Motion Dec.||-7.40 milliarcseconds/year|
|Proper Motion RA.||1.37 milliarcseconds/year|
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