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AR Scorpii

AR Scorpii Facts

Information on AR Scorpii

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's Alternative Names

AR Scorpii has alternative name(s) :- Ar Sco.

More details on objects' alternative names can be found at Star Names .

Location of AR Scorpii

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 .

Proper Motion of AR Scorpii

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.

Physical Properties (Colour) of AR Scorpii

AR Scorpii Colour and Temperature

AR Scorpii has a spectral type of M5+D? D. This means the star is a red star.

Distance to AR Scorpii

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 is about 253,747,920,081 miles from Earth.

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.

Travel Time to AR Scorpii

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Walking463,436,980,020.26
Car1202,114,566,000.68
Airbus A380736344,766,195.76
Speed of Sound (Mach 1) 767.269330,715,720.41
Concorde (Mach 2)1,534.54165,357,644.69
New Horizons Probe33,0007,689,330.91
Speed of Light670,616,629.00378.38

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Additional AR Scorpii Facts and Figures

Visual Facts


Primary / Proper / Traditional NameAR Scorpii
Alternative NamesAr Sco
Spectral TypeM5+D? D
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
ColourRed
GalaxyMilky Way
ConstellationScorpius
Right Ascension (R.A.)16h 21m` 47.288
Declination (Dec.)-22° 53` 10.40
Distance from Earth8.62 Parallax (milliarcseconds)
 378.38 Light Years
 116.01 Parsecs
 23,928,613.44 Astronomical Units
Proper Motion Dec.-50.50 milliarcseconds/year
Proper Motion RA.12.40 milliarcseconds/year

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Sources and Links


Sourcehttp://simbad.u-strasbg.fr/simbad/sim-id?Ident=AR+Scorpii

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