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HD 156385 (Wolf-Rayet Star) Facts

HD 156385 Facts

  • HD 156385 is a wolf-rayet star that can be located in the constellation of Ara. The description is based on the spectral class.
  • HD 156385 is not part of the constellation outline but is within the borders of the constellation.
  • The star can not be seen by the naked eye, you need a telescope to see it.
  • The star is calculated at being about -3792.60 light years away from us. Distance

HD 156385's Alternative Names

HIP84757 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD156385.

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

Location of HD 156385

The location of the wolf-rayet 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 156385, the location is 17h 19m 29.90 and -45° 38` 23.8 .

Wolf-Rayet Star

The star is a Wolf-Rayet, a rare type of star of which not many are known. These stars are extremely luminous and large compared to our Sun. They live fast and die hard in a matter of millions not billions of years like our Sun. They exhaust their hydrogen supplies, turning to other gasses and expand outwards with massive solar winds, moving a step closer in the stellar evolution towards their death in a super or hypernova explosion.

Physical Properties of HD 156385

HD 156385 Temperature and Colour

Based on the star's spectral type of WC... The star has a B-V Colour Index of 0.03 which means the star's temperature is about 9,610 Kelvin. The temperature was calculated using information from Morgans @ Uni.edu.

HD 156385 Radius

HD 156385 Apparent and Absolute Magnitudes

HD 156385 has an apparent magnitude of 6.93 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. Using the supplied Parallax value, you would get an absolute magnitude of 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 156385

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as -0.86000 which gave the calculated distance to HD 156385 as -3792.60 light years away from Earth or -1162.79 parsecs. If you want that in miles, it is about -22,295,274,590,336,159.29, based on 1 Ly = 5,878,625,373,183.61 miles.

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 156385 Facts and Figures

Visual Facts


Primary / Proper / Traditional NameHD 156385
Alternative NamesHD 156385, HIP 84757, WR 90
Spectral TypeWC...
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeWolf-Rayet star
GalaxyMilky Way
ConstellationAra
Visual / Apparent Magnitude6.93
Naked Eye VisibleRequires a 7x50 Binoculars - Magnitudes
Right Ascension (R.A.)17h 19m 29.90
Declination (Dec.)-45° 38` 23.8
Galactic Latitude-4.76272710 degrees
Galactic Longitude343.16412540 degrees
Distance from Earth-0.86000 Parallax (milliarcseconds)
 -3792.60 Light Years
 -1162.79 Parsecs
 -239,840,982.82 Astronomical Units
B-V Index0.03

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Effective Temperature9,610 Kelvin

Sources and Links


SIMBAD SourceLink

Related Stars


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