To call it a red star is too simplistic. AR Scorpii is a binary white dwarf-pulsar system to be discovered. The pulsar emits a beat of radiation at the red dwarf star as it orbits ever 3.5 hours. The pulsar is no bigger than our planet, Earth but has a mass that is 300,000 times higher. Register
AR Scorpii has alternative name(s) :- Ar Sco.
More details on objects' 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 object is compared to the celestial equator and is expressed in degrees. For AR Scorpii, the location is 16h 21m` 47.288 and -22° 53` 10.40 .
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 -50.50 milliarcseconds/year towards the north and 12.40 milliarcseconds/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.
AR Scorpii has a spectral type of M5+D? D. This means the star is a red star.
The Parallax of the star is given as 8.62 which gives a calculated distance to AR Scorpii of 378.38 light years from the Earth or 116.01 parsecs. It would take a spaceship travelling at the speed of light, 378.38 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.
The star is roughly 23,928,613.44 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||AR Scorpii|
|Alternative Names||Ar Sco|
|Spectral Type||M5+D? D|
|Constellation's Main Star||No|
|Multiple Star System||No / Unknown|
|Right Ascension (R.A.)||16h 21m` 47.288|
|Declination (Dec.)||-22° 53` 10.40|
|Distance from Earth||8.62 Parallax (milliarcseconds)|
|378.38 Light Years|
|23,928,613.44 Astronomical Units|
|Proper Motion Dec.||-50.50 milliarcseconds/year|
|Proper Motion RA.||12.40 milliarcseconds/year|
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