Universe Guide


V509 Persei, HD18878, HIP14264

V509 Persei is a blue to white pulsating star that can be located in the constellation of Perseus. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP14264 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD18878.

V509 Persei has alternative name(s), V509 Per.

Location of V509 Persei

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 V509 Persei, the location is 03h 03m 56.75 and +47d50`54.6 .

Proper Motion of V509 Persei

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 -7.41 ± 0.33 miliarcseconds/year towards the north and -8.97 ± 0.46 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of V509 Persei

V509 Persei has a spectral type of F0. This means the star is a blue to white star. The star is 7486.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24416.5879318400000000s. The star has a B-V Colour Index of 0.3 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 6,790 Kelvin.

V509 Persei Radius has been calculated as being 3.81 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 2,652,382.22.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 3.66. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V509 Persei Apparent and Absolute Magnitudes

V509 Persei has an apparent magnitude of 6.48 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 1.24 If you used the 2007 Parallax value, you would get an absolute magnitude of 1.33. 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 V509 Persei

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 8.97 which gave the calculated distance to V509 Persei as 363.62 light years away from Earth or 111.48 parsecs. It would take a spaceship travelling at the speed of light, 363.62 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 9.35 which put V509 Persei at a distance of 348.84 light years or 106.95 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 7,486.00 Parsecs or 24,416.59 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 V509 Persei

The star is a pulsating Delta Scuti 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. V509 Persei brightness ranges from a magnitude of 6.573 to a magnitude of 6.526 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.

V509 Persei Facts

Alternative Names

Traditional/Proper NameV509 Persei
Short NameV509 Per
Hipparcos Library I.D.14264
Bonner DurchmusterungBD+47 760
Henry Draper Designation18878

Visual Facts

Star Type star
Absolute Magnitude1.24 / 1.33
Visual / Apparent Magnitude6.48
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)03h 03m 56.75
Declination (Dec.)+47d50`54.6
Galactic Latitude-9.33 degrees
Galactic Longitude144.75 degrees
1997 Distance from Earth8.97 Parallax (milliarcseconds)
 363.62 Light Years
 111.48 Parsecs
2007 Revised Distance from Earth9.35 Parallax (milliarcseconds)
 348.84 Light Years
 106.95 Parsecs
Galacto-Centric Distance24,416.59 Light Years / 7,486.00 Parsecs
Proper Motion Dec.-7.41 ± 0.33 milliarcseconds/year
Proper Motion RA.-8.97 ± 0.46 milliarcseconds/year
B-V Index0.30
Radial Velocity-2.50 ± 5.00 km/s
Spectral TypeF0
Colour(F) blue to white

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeDelta Scuti
Mean Variability Period in Days0.146
Variable Magnitude Range (Brighter - Dimmer)6.526 - 6.573

Estimated Facts

Calculated Effective Temperature6,790 Kelvin

Sources and Links

SIMBAD SourceLink

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