Universe Guide


HIP 8541 - HD11343

HIP 8541 is a orange to red subgiant star that can be located in the constellation of Eridanus. HIP8541 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD11343. HIP 8541 has at least 1 Extrasolar Planets believed to be in orbit around the star.

Location of HIP 8541

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 HIP 8541, the location is 01h 50m 06.22 and -54d27`53.5 .

Proper Motion of HIP 8541

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 -046.99 ± 000.54 towards the north and 110.82 ± 000.61 east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Mass, Radius) of HIP 8541

HIP 8541 has a spectral type of K2III/IV. This means the star is a orange to red subgiant star. The star has a B-V Colour Index of 1.07 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,718 Kelvin.

HIP 8541 has been calculated as 5.24 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 3,646,288.65.km. The star's solar mass is 1.00 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

The star's metallicity is -0.150000, this value is the fractional amount of the star that is not Hydrogen (X) or Helium (Y). An older star would have a high metallicity whereas a new star would have a lower one.

HIP 8541 Apparent and Absolute Magnitudes

HIP 8541 has an apparent magnitude of 7.88 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 2.13 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.75. 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 HIP 8541

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 7.09 which gave the calculated distance to HIP 8541 as 460.03 light years away from Earth or 141.04 parsecs. It would take a spaceship travelling at the speed of light, 460.03 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 5.93 which put HIP 8541 at a distance of 550.02 light years or 168.63 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.

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 Stellar Age, Metallicity or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

HIP 8541 Facts

Alternative Names

Traditional NameHIP 8541
Hipparcos Library I.D.8541
Henry Draper Designation11343

Visual Facts

Star Typesubgiant star
Absolute Magnitude2.13 / 1.75
Apparent Magnitude7.88
Right Ascension (R.A.)01h 50m 06.22
Declination (Dec.)-54d27`53.5
1997 Distance from Earth7.09 Parallax (milliarcseconds)
 460.03 Light Years
 141.04 Parsecs
2007 Revised Distance from Earth5.93 Parallax (milliarcseconds)
 550.02 Light Years
 168.63 Parsecs
Proper Motion Dec.-46.99 ± 0.54 milliarcseconds/year
Proper Motion RA.110.82 ± 0.61 milliarcseconds/year
B-V Index1.07
Spectral TypeK2III/IV
Colour(K) Orange to Red

Companions (Multi-Star and Exoplanets) Facts

Exoplanet Count1

Estimated Facts

Radius (x the Sun)5.24
Calculated Effective Temperature4,718 Kelvin
Mass Compared to the Sun1.00

Sources and Links

SIMBAD SourceLink

Related Stars

List of Extrasolar Planets orbiting HIP 8541

NameStatusMass (Jupiters)Orbital Period (Days)EccentricityDiscoveredSemi-Major AxisPeriastron
Hip 8541 BConfirmed5.591560.0000.1620162.8294.000

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