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KY Muscae, HD109867, HIP61703

KY Muscae is a blue supergiant star that can be located in the constellation of Musca. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

KY Muscae's Alternative Names

HIP61703 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD109867.

KY Muscae has alternative name(s) :- , KY Mus.

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

Location of KY Muscae

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 KY Muscae, the location is 12h 38m 52.37 and -67° 11` 35.0 .

Physical Properties (Colour, Temperature) of KY Muscae

KY Muscae has a spectral type of B1Ia. This means the star is a blue supergiant star. The star has a B-V Colour Index of 0 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 10,293 Kelvin.

KY Muscae Radius has been calculated as being 557.10 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 387,628,505.12.km. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

KY Muscae Apparent and Absolute Magnitudes

KY Muscae has an apparent magnitude of 6.22 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 -11.39 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 KY Muscae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.03 which gave the calculated distance to KY Muscae as 108721.11 light years away from Earth or 33333.33 parsecs. It would take a spaceship travelling at the speed of light, 108721.11 years to get there. We don't have the technology or spaceship that can carry people over that distance yet. KY Muscae brightness ranges from a magnitude of 6.300 to a magnitude of 6.242 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.0 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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KY Muscae Facts

Visual Facts

Alternative NamesHD 109867, HIP 61703, KY Mus
Star Type very luminous Supergiant Star
GalaxyMilky Way
Visual / Apparent Magnitude6.22
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)12h 38m 52.37
Declination (Dec.)-67° 11` 35.0
Galactic Latitude-4.35 degrees
Galactic Longitude301.71 degrees
Distance from Earth0.03 Parallax (milliarcseconds)
 108721.11 Light Years
 33333.33 Parsecs
B-V Index0.00
Radial Velocity-15.80 ± 2.00 km/s
Spectral TypeB1Ia
Colour(B) blue

Variable Star Details

Mean Variability Period in Days0.045
Variable Magnitude Range (Brighter - Dimmer)6.242 - 6.300

Estimated Facts

Calculated Effective Temperature10,293 Kelvin

Sources and Links

SIMBAD SourceLink

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
109867-66 1861.4A6.50000-4.00000-8.00000B2Blue/White

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