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HD 150433, HIP81681

HD 150433 is a white to yellow star that can be located in the constellation of Ophiuchus. The star can not be seen by the naked eye, you need a telescope to see it. The star has an estimated age of 13.80 Billion of Years but could be as young as 9.90 to 16.70 according to Hipparcos.

HIP81681 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD150433. The Gliese ID of the star is GL 634.1. The star was part of the original catalogue devised by German Astronomer Wilheim Gliese of stars located within 20 parsecs of Earth. Ref : Star Names. HD 150433 has at least 1 Extrasolar Planets believed to be in orbit around the star.

Location of HD 150433

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 HD 150433, the location is 16h 41m 08.23 and -02d 51` 22.3 .

Proper Motion of HD 150433

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 -445.11 ± 0.34 miliarcseconds/year towards the north and -25.58 ± 0.58 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 -40.18000 km/s with an error of about 0.09 km/s .

Physical Properties (Colour, Temperature, Age, Radius) of HD 150433

HD 150433 has a spectral type of G0. This means the star is a white to yellow star. The star is 7374.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24051.2849865600000000s. The star has a B-V Colour Index of 0.63 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,807 Kelvin.

HD 150433 Radius has been calculated as being 0.98 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 684,599.32.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 0.98. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures. The star's Iron Abundance is -0.34 with an error value of 0.02 Fe/H with the Sun has a value of 1 to put it into context.

The stars age according to Hipparcos data files put the star at an age of about 13.80 Billion years old but could be between 9.90 and 16.70 Billion years old. In comparison, the Sun's age is about 4.6 Billion Years Old. The reported age is older than the widely recognised age of the Universe so a little scepticism about the age is warranted.

HD 150433 Apparent and Absolute Magnitudes

HD 150433 has an apparent magnitude of 7.21 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 4.86 If you used the 2007 Parallax value, you would get an absolute magnitude of 4.86. 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 HD 150433

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 33.84 which gave the calculated distance to HD 150433 as 96.38 light years away from Earth or 29.55 parsecs. It would take a spaceship travelling at the speed of light, 96.38 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 33.82 which put HD 150433 at a distance of 96.44 light years or 29.57 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 7,374.00 Parsecs or 24,051.28 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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.

HD 150433 Facts

Alternative Names

Traditional/Proper NameHD 150433
Hipparcos Library I.D.81681
Bonner DurchmusterungBD-02 4230
Gliese IDGL 634.1
Henry Draper Designation150433

Visual Facts

Star Type star
Age13.80 Billion Years Old
Age Range9.90 - 16.70 Billion Years Old
Absolute Magnitude4.86 / 4.86
Visual / Apparent Magnitude7.21
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)16h 41m 08.23
Declination (Dec.)-02d 51` 22.3
Galactic Latitude27.12 degrees
Galactic Longitude13.95 degrees
1997 Distance from Earth33.84 Parallax (milliarcseconds)
 96.38 Light Years
 29.55 Parsecs
2007 Revised Distance from Earth33.82 Parallax (milliarcseconds)
 96.44 Light Years
 29.57 Parsecs
Galacto-Centric Distance24,051.28 Light Years / 7,374.00 Parsecs
Proper Motion Dec.-445.11 ± 0.34 milliarcseconds/year
Proper Motion RA.-25.58 ± 0.58 milliarcseconds/year
B-V Index0.63
Radial Velocity-40.18 ± 0.09 km/s
Iron Abundance-0.34 ± 0.02 Fe/H
Spectral TypeG0
Colour(G) White to Yellow

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Facts

Calculated Effective Temperature5,807 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

Multi-Star System

The star has been identified as being a multi-star system, one in which there is at least one star in close orbit to another star or two or more stars orbiting a central point. The stars may be of equal mass, unequal mass where one star is stronger than the other or be in groups orbiting a central point which doesn't necessarily have to be a star. More information can be found on my dedicated multiple star systems page. The source of the info is Simbad. The file is dated 2000 so any differences between this and any other source will be down to the actual source from where the information came from.

Proper Motion mas/yr
H.D. IdB.D. IdStar CodeMagnitudeR.A.Dec.SpectrumColourYear
150433-02 4230.0A7.10000-26.00000-439.00000G0Yellow

List of Extrasolar Planets orbiting HD 150433

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastronInclination
HD 150433 bConfirmed0.01971096.2000.020111.93032011.000

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