Universe Guide

HD 167756

HD 167756 Facts

  • HD 167756 is a supergiant star that can be located in the constellation of Corona Australis. The description is based on the spectral class.
  • HD 167756 is not part of the constellation outline but is within the borders of the constellation.
  • Based on the spectral type (B0.5Ia) of the star, the star's colour is blue .
  • The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.
  • Using the most recent figures given by the 2007 Hipparcos data, the star is 13046.53 light years away from us. Distance

HD 167756's Alternative Names

HIP89726 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD167756.

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

Location of HD 167756

The location of the supergiant 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 HD 167756, the location is 18h 18m 40.15 and -42° 17` 18.2 .

Radial Velocity and Proper Motion of HD 167756

Proper Motion

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 -5.19 ± 0.24 milliarcseconds/year towards the north and 4.33 ± 0.44 milliarcseconds/year east if we saw them in the horizon.

Radial Velocity

The Radial Velocity, that is the speed at which the star is moving away/towards the Sun is -25.00000 km/s with an error of about 2.90 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 HD 167756

HD 167756 Colour and Temperature

Based on the star's spectral type of B0.5Ia , HD 167756's colour and type is blue supergiant star. The star has a B-V Colour Index of -0.14 which means the star's temperature is about 16,194 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

HD 167756 Apparent and Absolute Magnitudes

HD 167756 has an apparent magnitude of 6.30 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 If you used the 2007 Parallax value, you would get an absolute magnitude of -6.71. 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 167756

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.74000 which gave the calculated distance to HD 167756 as -4407.61 light years away from Earth or -1351.35 parsecs. If you want that in miles, it is about -25,910,687,981,097,811.27, based on 1 Ly = 5,878,625,373,183.61 miles.

In 2007, Hipparcos data was revised with a new parallax of 0.25000 which put HD 167756 at a distance of 13046.53 light years or 4000 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.

Using the 2007 distance, the star is roughly 825,053,475.94 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.

Travel Time to HD 167756

The time it will take to travel to this star is dependent on how fast you are going. U.G. has done some calculations as to how long it will take going at differing speeds. A note about the calculations, when I'm talking about years, I'm talking non-leap years only (365 days).

The New Horizons space probe is the fastest probe that we've sent into space at the time of writing. Its primary mission was to visit Pluto which at the time of launch (2006), Pluto was still a planet.

DescriptionSpeed (m.p.h.)Time (years)
Airbus A38073611,887,527,131.45
Speed of Sound (Mach 1)767.26911,403,067,201.66
Concorde (Mach 2)1,534.545,701,526,169.89
New Horizons Probe33,000265,127,877.84
Speed of Light670,616,629.0013,046.53

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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Additional HD 167756 Facts and Figures

Visual Facts

Primary / Proper / Traditional NameHD 167756
Alternative NamesHD 167756, HIP 89726
Spectral TypeB0.5Ia
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star Type very luminous Supergiant Star
GalaxyMilky Way
ConstellationCorona Australis
Absolute Magnitude / -6.71
Visual / Apparent Magnitude6.30
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)18h 18m 40.15
Declination (Dec.)-42° 17` 18.2
Galactic Latitude-12.29814903 degrees
Galactic Longitude351.47173252 degrees
1997 Distance from Earth-0.74000 Parallax (milliarcseconds)
 -4407.61 Light Years
 -1351.35 Parsecs
2007 Distance from Earth0.25000 Parallax (milliarcseconds)
 13046.53 Light Years
 4000 Parsecs
 825,053,475.94 Astronomical Units
Proper Motion Dec.-5.19000 ± 0.24000 milliarcseconds/year
Proper Motion RA.4.33000 ± 0.44000 milliarcseconds/year
B-V Index-0.14
Radial Velocity-25.00000 ± 2.90 km/s

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Estimated Calculated Facts

Effective Temperature16,194 Kelvin

Sources and Links

SIMBAD SourceLink

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Comments and Questions

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