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V450 Scuti, HD170975, HIP90913

V450 Scuti is a orange to red pulsating supergiant star that can be located in the constellation of Scutum. The description is based on the spectral class. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

V450 Scuti's Alternative Names

HIP90913 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD170975.

V450 Scuti has alternative name(s) :- , V450 Sct.

BD number is the number that the star was filed under in the Durchmusterung or Bonner Durchmusterung, a star catalogue that was put together by the Bonn Observatory between 1859 to 1903. The star's BD Number is BD-14 5099.

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

Location of V450 Scuti

The location of the 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 star is compared to the celestial equator and is expressed in degrees. For V450 Scuti, the location is 18h 32m 43.32 and -14° 51` 56.4 .

Proper Motion of V450 Scuti

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 -3.29 ± 0.24 miliarcseconds/year towards the north and 0.82 ± 0.36 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 4.80000 km/s with an error of about 1.30 km/s .

Physical Properties (Colour, Temperature) of V450 Scuti

V450 Scuti has a spectral type of K3Iab. This means the star is a orange to red supergiant star. The star is 6,730.00 Parsecs from the Galactic Centre or terms of Light Years is 21,950.79 s. The star has a B-V Colour Index of 1.99 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 1,896 Kelvin.

V450 Scuti Radius has been calculated as being 271.18 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 188,684,189.95.km. If you need the diameter of the star, you just need to multiple the radius by 2. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 615.56. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V450 Scuti Apparent and Absolute Magnitudes

V450 Scuti has an apparent magnitude of 5.47 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 -2.48 If you used the 2007 Parallax value, you would get an absolute magnitude of -4.26. 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 V450 Scuti

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 2.57 which gave the calculated distance to V450 Scuti as 1269.12 light years away from Earth or 389.11 parsecs. It would take a spaceship travelling at the speed of light, 1269.12 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 1.13 which put V450 Scuti at a distance of 2886.40 light years or 884.96 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 6,730.00 Parsecs or 21,950.79 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

Variable Type of V450 Scuti

The star is a pulsating Semi-Regular Star which are giants or supergiants of intermediate and late spectral variable type which means that its size changes over time. The Variable Type is usually named after the first star of that type to be spotted. V450 Scuti brightness ranges from a magnitude of 5.625 to a magnitude of 5.490 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.1 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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V450 Scuti Facts

Visual Facts

Primary / Proper / Traditional NameV450 Scuti
Alternative NamesHD 170975, HIP 90913, BD-14 5099, V450 Sct
Spectral TypeK3Iab
Multiple Star SystemNo / Unknown
Star Type very luminous Supergiant Star
Colour orange to red
GalaxyMilky Way
Absolute Magnitude-2.48 / -4.26
Visual / Apparent Magnitude5.47
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)18h 32m 43.32
Declination (Dec.)-14° 51` 56.4
Galactic Latitude-2.68 degrees
Galactic Longitude17.59 degrees
1997 Distance from Earth2.57 Parallax (milliarcseconds)
 1269.12 Light Years
 389.11 Parsecs
2007 Distance from Earth1.13 Parallax (milliarcseconds)
 2886.40 Light Years
 884.96 Parsecs
Galacto-Centric Distance21,950.79 Light Years / 6,730.00 Parsecs
Proper Motion Dec.-3.29 ± 0.24 milliarcseconds/year
Proper Motion RA.0.82 ± 0.36 milliarcseconds/year
B-V Index1.99
Radial Velocity4.80 ± 1.30 km/s
Semi-Major Axis6628.00

Companions (Multi-Star and Exoplanets) Facts

Exoplanet CountNone/Unaware

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSemi-Regular Star which are giants or supergiants of intermediate and late spectral
Mean Variability Period in Days0.112
Variable Magnitude Range (Brighter - Dimmer)5.490 - 5.625

Estimated Facts

Calculated Effective Temperature1,896 Kelvin

Sources and Links

SIMBAD SourceLink

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