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V363 Puppis - HD55718 - HIP34817

V363 Puppis is a blue pulsating main sequence dwarf star that can be located in the constellation of Puppis. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

HIP34817 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD55718. The Id of the star in the Gould Star Catalogue is 69. Stars in the southern hemisphere are more likely to have a Gould Id than the northern hemisphere. For example, there are no Gould classified stars in Ursa Major.

V363 Puppis has alternative name(s), V363_Pup.

Location of V363 Puppis

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 V363 Puppis, the location is 07h 12m 25.83 and -36d32`39.8 .

Proper Motion of V363 Puppis

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 6.12 ± 0.33 miliarcseconds/year towards the north and -9.80 ± 0.39 miliarcseconds/year east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of V363 Puppis

V363 Puppis has a spectral type of B4V. This means the star is a blue main sequence dwarf star. The star is 7498.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24455.7275331200000000s. The star has a B-V Colour Index of -0.14 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 13,196 Kelvin.

V363 Puppis Radius has been calculated as being 3.21 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 2,231,082.78.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 3.22. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

V363 Puppis Apparent and Absolute Magnitudes

V363 Puppis has an apparent magnitude of 5.94 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 -1.27 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.28. 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 V363 Puppis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 3.61 which gave the calculated distance to V363 Puppis as 903.50 light years away from Earth or 277.01 parsecs. It would take a spaceship travelling at the speed of light, 903.50 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 3.59 which put V363 Puppis at a distance of 908.53 light years or 278.55 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 7,498.00 Parsecs or 24,455.73 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 V363 Puppis

The star is a pulsating Slow Pulsating B- star 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. V363 Puppis 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 1.0 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.

V363 Puppis Facts

Alternative Names

Traditional/Proper NameV363 Puppis
Short NameV363 Pup
Hipparcos Library I.D.34817
Gould I.D.69
Henry Draper Designation55718

Visual Facts

Star Typemain sequence dwarf star
Absolute Magnitude-1.27 / -1.28
Visual / Apparent Magnitude5.94
Naked Eye VisibleYes - Ref: Wiki
Right Ascension (R.A.)07h 12m 25.83
Declination (Dec.)-36d32`39.8
Galactic Latitude-11.89 degrees
Galactic Longitude248.09 degrees
1997 Distance from Earth3.61 Parallax (milliarcseconds)
 903.50 Light Years
 277.01 Parsecs
2007 Revised Distance from Earth3.59 Parallax (milliarcseconds)
 908.53 Light Years
 278.55 Parsecs
Galacto-Centric Distance24,455.73 Light Years / 7,498.00 Parsecs
Proper Motion Dec.6.12 ± 0.33 milliarcseconds/year
Proper Motion RA.-9.80 ± 0.39 milliarcseconds/year
B-V Index-0.14
Radial Velocity17.00 ± 4.30 km/s
Spectral TypeB4V
Colour(B) blue

Variable Star Details

Variable Star ClassPulsating
Variable Star TypeSlow Pulsating B- star
Mean Variability Period in Days1.000

Estimated Facts

Calculated Effective Temperature13,196 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
55718-36 3421.2A6.00000-10.000000.00000B5Blue/White
B8.500001881

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