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V440 Persei - HD14662 - HIP11174

V440 Persei is a blue to white pulsating very luminous supergiant 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.

HIP11174 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD14662.

V440 Persei has alternative name(s), V440_Per.

Location of V440 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 V440 Persei, the location is 02h 23m 51.75 and +55d21`53.5 .

Proper Motion of V440 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 -2.60 ± 0.29 miliarcseconds/year towards the north and -1.37 ± 0.46 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of V440 Persei

V440 Persei has a spectral type of F7Ib. This means the star is a blue to white supergiant star. The star has a B-V Colour Index of 0.84 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 5,331 Kelvin.

V440 Persei Radius has been calculated as being 37.27 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 25,929,645.53.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 56.41. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V440 Persei Apparent and Absolute Magnitudes

V440 Persei has an apparent magnitude of 6.29 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 -2.66 If you used the 2007 Parallax value, you would get an absolute magnitude of -3.56. 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 V440 Persei

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 1.62 which gave the calculated distance to V440 Persei as 2013.35 light years away from Earth or 617.28 parsecs. It would take a spaceship travelling at the speed of light, 2013.35 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 1.07 which put V440 Persei at a distance of 3048.26 light years or 934.58 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.

Variable Type of V440 Persei

The star is a pulsating Delta Cepheid 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. V440 Persei brightness ranges from a magnitude of 6.000 to a magnitude of 6.000 over its variable period. The smaller the magnitude, the brighter the star. Its variable/pulsating period lasts for 8.0 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.

V440 Persei Facts

Alternative Names

Traditional/Proper NameV440 Persei
Short NameV440 Per
Hipparcos Library I.D.11174
Bonner DurchmusterungBDD+54 535
Henry Draper Designation14662

Visual Facts

Star Typesupergiant star
Absolute Magnitude-2.66 / -3.56
Visual / Apparent Magnitude6.29
Naked Eye VisibleYes - Ref: Wiki
Right Ascension (R.A.)02h 23m 51.75
Declination (Dec.)+55d21`53.5
Galactic Latitude-5.17 degrees
Galactic Longitude135.87 degrees
1997 Distance from Earth1.62 Parallax (milliarcseconds)
 2013.35 Light Years
 617.28 Parsecs
2007 Revised Distance from Earth1.07 Parallax (milliarcseconds)
 3048.26 Light Years
 934.58 Parsecs
Proper Motion Dec.-2.60 ± 0.29 milliarcseconds/year
Proper Motion RA.-1.37 ± 0.46 milliarcseconds/year
B-V Index0.84
Radial Velocity-25.80 ± 0.30 km/s
Spectral TypeF7Ib
Colour(F) blue to white

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeDelta Cepheid
Mean Variability Period in Days8.000

Estimated Facts

Calculated Effective Temperature5,331 Kelvin

Sources and Links

SIMBAD SourceLink

Related Stars

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
14662+54 535.0A6.500004.00000-10.00000G0Yellow
B14.600001906

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