Universe Guide


V450 Aquilae, HD184313, HIP96204

V450 Aquilae is a red pulsating main sequence dwarf star that can be located in the constellation of Aquila. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP96204 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD184313.

V450 Aquilae has alternative name(s), V450 Aql.

Location of V450 Aquilae

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 V450 Aquilae, the location is 19h 33m 46.03 and +05d27`56.8 .

Proper Motion of V450 Aquilae

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 -24.24 ± 0.27 miliarcseconds/year towards the north and -5.26 ± 0.47 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of V450 Aquilae

V450 Aquilae has a spectral type of M8V. This means the star is a red main sequence dwarf star. The star is 7255.00000000 Parsecs from the Galactic Centre or terms of Light Years is 23663.1506072000000000s. The star has a B-V Colour Index of 1.47 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,042 Kelvin.

V450 Aquilae Radius has been calculated as being 26.90 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 18,715,549.16.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 20.69. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V450 Aquilae Apparent and Absolute Magnitudes

V450 Aquilae has an apparent magnitude of 6.35 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 -0.75 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.18. 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 Aquilae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 3.80 which gave the calculated distance to V450 Aquilae as 858.32 light years away from Earth or 263.16 parsecs. It would take a spaceship travelling at the speed of light, 858.32 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 4.94 which put V450 Aquilae at a distance of 660.25 light years or 202.43 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 7,255.00 Parsecs or 23,663.15 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 Aquilae

The star is a pulsating Semiregular late- (M, C, S or Me, Ce, Se) giants with poorly defined periodicity 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 Aquilae brightness ranges from a magnitude of 6.271 to a magnitude of 6.028 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 0.2 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.

V450 Aquilae Facts

Alternative Names

Traditional/Proper NameV450 Aquilae
Short NameV450 Aql
Hipparcos Library I.D.96204
Bonner DurchmusterungBD+05 4190
Henry Draper Designation184313

Visual Facts

Star Typemain sequence dwarf star
Absolute Magnitude-0.75 / -0.18
Visual / Apparent Magnitude6.35
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)19h 33m 46.03
Declination (Dec.)+05d27`56.8
Galactic Latitude-6.85 degrees
Galactic Longitude42.68 degrees
1997 Distance from Earth3.80 Parallax (milliarcseconds)
 858.32 Light Years
 263.16 Parsecs
2007 Revised Distance from Earth4.94 Parallax (milliarcseconds)
 660.25 Light Years
 202.43 Parsecs
Galacto-Centric Distance23,663.15 Light Years / 7,255.00 Parsecs
Proper Motion Dec.-24.24 ± 0.27 milliarcseconds/year
Proper Motion RA.-5.26 ± 0.47 milliarcseconds/year
B-V Index1.47
Radial Velocity-53.13 ± 0.43 km/s
Spectral TypeM8V
Colour(M) Red

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSemiregular late- (M, C, S or Me, Ce, Se) giants with poorly defined periodicity
Mean Variability Period in Days0.234
Variable Magnitude Range (Brighter - Dimmer)6.028 - 6.271

Estimated Facts

Calculated Effective Temperature4,042 Kelvin

Sources and Links

SIMBAD SourceLink

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