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V1010 Ophiuchi, HD151676, HIP82339

V1010 Ophiuchi is a blue eclipsing main sequence dwarf star that can be located in the constellation of Ophiuchus. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

V1010 Ophiuchi's Alternative Names

HIP82339 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD151676.

V1010 Ophiuchi has alternative name(s) :- , V1010 Oph.

The Gould star designation is one that was designed by American astronomer, Benjamin Apthorp Gould. Gould stars are predominantly in the Southern and Equatorial constellations but do appear in northern constellations such as Bootes and Orion. The star has the designation 48 G. Ophiuchi. There are no stars with a Gould designation in Ursa Major for example.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD-15 4395.

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

Location of V1010 Ophiuchi

The location of the star in the galaxy 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 V1010 Ophiuchi, the location is 16h 49m 27.67 and -15° 40` 04.8 .

Proper Motion of V1010 Ophiuchi

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 13.27 ± 0.48 miliarcseconds/year towards the north and -1.09 ± 0.79 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 us is -35.40000 km/s with an error of about 2.30 km/s .

V1010 Ophiuchi Luminosity

Luminosity is the amount of energy that a star pumps out and its relative to the amount that our star, the Sun gives out. The figure of 15.2100000 that I have given is based on the value in the Simbad Hipparcos Extended Catalogue at the University of Strasbourg from 2012.

Physical Properties (Colour, Temperature) of V1010 Ophiuchi

V1010 Ophiuchi has a spectral type of A3V. This means the star is a blue main sequence dwarf star. The star is 7330.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23907.7731152000000000s. The star has a B-V Colour Index of 0.23 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 7,593 Kelvin.

V1010 Ophiuchi Radius has been calculated as being 2.32 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 1,616,378.50.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 2.32. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V1010 Ophiuchi Apparent and Absolute Magnitudes

V1010 Ophiuchi has an apparent magnitude of 6.18 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 1.83 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.83. 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 V1010 Ophiuchi

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 13.47 which gave the calculated distance to V1010 Ophiuchi as 242.14 light years away from Earth or 74.24 parsecs. It would take a spaceship travelling at the speed of light, 242.14 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 13.50 which put V1010 Ophiuchi at a distance of 241.60 light years or 74.07 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 7,330.00 Parsecs or 23,907.77 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 V1010 Ophiuchi

The star is a eclipsing Beta Lyrae (Sheliak)/Contact Systems of early (O-A) Spectral Type (subtype) 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. V1010 Ophiuchi brightness ranges from a magnitude of 6.946 to a magnitude of 6.144 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.7 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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V1010 Ophiuchi Facts

Visual Facts

Alternative NamesHD 151676, HIP 82339, 48 G. Ophiuchi, BD-15 4395, V1010 Oph
Star Type main sequence Dwarf Star
GalaxyMilky Way
Absolute Magnitude1.83 / 1.83
Visual / Apparent Magnitude6.18
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)16h 49m 27.67
Declination (Dec.)-15° 40` 04.8
Galactic Latitude18.16 degrees
Galactic Longitude3.76 degrees
1997 Distance from Earth13.47 Parallax (milliarcseconds)
 242.14 Light Years
 74.24 Parsecs
2007 Revised Distance from Earth13.50 Parallax (milliarcseconds)
 241.60 Light Years
 74.07 Parsecs
Galacto-Centric Distance23,907.77 Light Years / 7,330.00 Parsecs
Proper Motion Dec.13.27 ± 0.48 milliarcseconds/year
Proper Motion RA.-1.09 ± 0.79 milliarcseconds/year
B-V Index0.23
Radial Velocity-35.40 ± 2.30 km/s
Semi-Major Axis8539.00
Stellar Luminosity (Lsun)15.21
Spectral TypeA3V
Colour(A) blue

Variable Star Details

Variable Star ClassEclipsing
Variable Star TypeBeta Lyrae (Sheliak)/Contact Systems of early (O-A) Spectral Type (subtype)
Mean Variability Period in Days0.661
Variable Magnitude Range (Brighter - Dimmer)6.144 - 6.946

Estimated Facts

Calculated Effective Temperature7,593 Kelvin

Sources and Links

SIMBAD SourceLink

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