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V1068 Scorpii, HD152161, HIP82650

V1068 Scorpii is a red eruptive giant star that can be located in the constellation of Scorpius. The description is based on the spectral class. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

V1068 Scorpii's Alternative Names

HIP82650 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD152161.

V1068 Scorpii has alternative name(s) :- , V1068 Sco.

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

Location of V1068 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 star is compared to the celestial equator and is expressed in degrees. For V1068 Scorpii, the location is 16h 53m 42.44 and -43° 03` 03.2 .

Radial Velocity and Proper Motion of V1068 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 -33.22 ± 0.22 miliarcseconds/year towards the north and -14.59 ± 0.36 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 -12.10 km/s with an error of about 0.50 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 (Colour, Temperature) of V1068 Scorpii

V1068 Scorpii has a spectral type of M3II/III. This means the star is a red giant star. The star is 7,181.00 Parsecs from the Galactic Centre or terms of Light Years is 23,421.79 s. The star has a B-V Colour Index of 1.64 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 3,671 Kelvin.

V1068 Scorpii Radius has been calculated as being 53.13 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 36,968,925.75.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 34.62. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V1068 Scorpii Apparent and Absolute Magnitudes

V1068 Scorpii has an apparent magnitude of 5.95 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. If you used the 1997 Parallax value, you would get an absolute magnitude of -1.81 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.88. Magnitude, whether it be apparent/visual or absolute magnitude is measured by a number, the smaller the number, the brighter the Star is. Our own Sun is the brightest star and therefore has the lowest of all magnitudes, -26.74. A faint star will have a high number.

Distance to V1068 Scorpii

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.81 which gave the calculated distance to V1068 Scorpii as 1160.72 light years away from Earth or 355.87 parsecs. It would take a spaceship travelling at the speed of light, 1160.72 years to get there. We don't have the technology or spaceship that can carry people over that distance yet.

In 2007, Hipparcos data was revised with a new parallax of 4.31 which put V1068 Scorpii at a distance of 756.76 light years or 232.02 parsecs. It should not be taken as though the star is moving closer or further away from us. It is purely that the distance was recalculated.

The star's Galacto-Centric Distance is 7,181.00 Parsecs or 23,421.79 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Variable Type of V1068 Scorpii

The star is a eruptive Irregular variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. V1068 Scorpii brightness ranges from a magnitude of 5.958 to a magnitude of 5.708 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.2 days (variability).

Source of Information

The source of the information if it has a Hip I.D. is from Simbad, the Hipparcos data library based at the University at Strasbourg, France. Hipparcos was a E.S.A. satellite operation launched in 1989 for four years. The items in red are values that I've calculated so they could well be wrong. Information regarding Metallicity and/or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

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V1068 Scorpii Facts

Visual Facts


Primary / Proper / Traditional NameV1068 Scorpii
Alternative NamesHD 152161, HIP 82650, V1068 Sco
Spectral TypeM3II/III
Multiple Star SystemNo / Unknown
Star TypeGiant Star
Colour red
GalaxyMilky Way
ConstellationScorpius
Absolute Magnitude-1.81 / -0.88
Visual / Apparent Magnitude5.95
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)16h 53m 42.44
Declination (Dec.)-43° 03` 03.2
Galactic Latitude0.48 degrees
Galactic Longitude342.46 degrees
1997 Distance from Earth2.81 Parallax (milliarcseconds)
 1160.72 Light Years
 355.87 Parsecs
2007 Distance from Earth4.31 Parallax (milliarcseconds)
 756.76 Light Years
 232.02 Parsecs
Galacto-Centric Distance23,421.79 Light Years / 7,181.00 Parsecs
Proper Motion Dec.-33.22 ± 0.22 milliarcseconds/year
Proper Motion RA.-14.59 ± 0.36 milliarcseconds/year
B-V Index1.64
Radial Velocity-12.10 ± 0.50 km/s
Eccentricity0.19
Semi-Major Axis5935.00

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Variable Star Details


Variable Star ClassEruptive
Variable Star TypeIrregular
Mean Variability Period in Days0.221
Variable Magnitude Range (Brighter - Dimmer)5.708 - 5.958

Estimated Facts


Calculated Effective Temperature3,671 Kelvin

Sources and Links


SIMBAD SourceLink

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