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V644 Scorpii

V644 Scorpii Facts

Location of V644 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 V644 Scorpii, the location is 17 26 18.9462987020 and -40 01 52.215284195 .

Radial Velocity and Proper Motion of V644 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 -0.75 miliarcseconds/year towards the north and 1.45 miliarcseconds/year east if we saw them in the horizon.

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -30.00 km/s . 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 of V644 Scorpii

V644 Scorpii has a spectral type of N6,4.

Distance to V644 Scorpii

The Parallax of the star is given as 0.77 which gives a calculated distance to V644 Scorpii of 4241.40 light years from the Earth or 1300.39 parsecs. It would take a spaceship travelling at the speed of light, 4241.40 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

The star is roughly 268,222,822.39 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.

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Additional V644 Scorpii Facts and Figures

Visual Facts


Primary / Proper / Traditional NameV644 Scorpii
Spectral TypeN6,4
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeStar
GalaxyMilky Way
ConstellationScorpius
Right Ascension (R.A.)17 26 18.9462987020
Declination (Dec.)-40 01 52.215284195
Distance from Earth0.77 Parallax (milliarcseconds)
 4241.40 Light Years
 1300.39 Parsecs
 268,222,822.39 Astronomical Units
Proper Motion Dec.-0.75 milliarcseconds/year
Proper Motion RA.1.45 milliarcseconds/year
Radial Velocity-30.00 km/s

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Related Stars


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