Universe Guide


V762 Cassiopeiae - HD7389 - HIP5926

V762 Cassiopeiae is a orange to red pulsating main sequence dwarf star that can be located in the constellation of Cassiopeia. HIP5926 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD7389. V762 Cassiopeiae has alternative name(s), V762_Cas.

Location of V762 Cassiopeiae

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 V762 Cassiopeiae, the location is 01h 16m 11.90 and +71d44`37.8 .

Proper Motion of V762 Cassiopeiae

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 -000.50 ± 000.32 towards the north and -000.95 ± 000.45 east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of V762 Cassiopeiae

V762 Cassiopeiae has a spectral type of K1V. This means the star is a orange to red main sequence dwarf star. The star has a B-V Colour Index of 2.04 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 841 Kelvin.

V762 Cassiopeiae has been calculated as 13,408.63 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 9,329,721,603.75.km.

V762 Cassiopeiae Apparent and Absolute Magnitudes

V762 Cassiopeiae has an apparent magnitude of 5.87 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 -7.42 If you used the 2007 Parallax value, you would get an absolute magnitude of -3.77. 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 V762 Cassiopeiae

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 0.22 which gave the calculated distance to V762 Cassiopeiae as 14825.61 light years away from Earth or 4545.45 parsecs. It would take a spaceship travelling at the speed of light, 14825.61 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 1.18 which put V762 Cassiopeiae at a distance of 2764.10 light years or 847.46 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 V762 Cassiopeiae

The star is a pulsating Semiregular s, 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. V762 Cassiopeiae 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.

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 Stellar Age, Metallicity or Mass is from the E.U. Exoplanets. The information was obtained as of 12th Feb 2017.

V762 Cassiopeiae Facts

Alternative Names

Traditional NameV762 Cassiopeiae
Short NameV762 Cas
Hipparcos Library I.D.5926
Bonner DurchmusterungBD+70 90
Henry Draper Designation7389

Visual Facts

Star Typemain sequence dwarf star
Absolute Magnitude-7.42 / -3.77
Apparent Magnitude5.87
Right Ascension (R.A.)01h 16m 11.90
Declination (Dec.)+71d44`37.8
1997 Distance from Earth0.22 Parallax (milliarcseconds)
 14825.61 Light Years
 4545.45 Parsecs
2007 Revised Distance from Earth1.18 Parallax (milliarcseconds)
 2764.10 Light Years
 847.46 Parsecs
Proper Motion Dec.-0.50 ± 0.32 milliarcseconds/year
Proper Motion RA.-0.95 ± 0.45 milliarcseconds/year
B-V Index2.04
Spectral TypeK1V
Colour(K) Orange to Red

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSemiregular s, which are giants or supergiants of intermediate and late spectral

Estimated Facts

Radius (x the Sun)13,408.63
Calculated Effective Temperature841 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
7389+70 90.0A6.50000-2.00000-1.00000K1Orange

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