Universe Guide

12 Puppis - HD65699 - HIP39023

12 Puppis is a white to yellow luminous giant star that can be located in the constellation of Puppis. HIP39023 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD65699. The Id of the star in the Gould Star Catalogue is 230. 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. 12 Puppis has alternative name(s), 12 Puppis , 12 Pup.

Location of 12 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 12 Puppis, the location is 07h 59m 05.72 and -23 d 18 ` 37.4 .

Proper Motion of 12 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 003.00 ± 000.00 towards the north and -011.00 ± 000.00 east if we saw them in the horizon.

Physical Properties (Colour, Temperature, Radius) of 12 Puppis

12 Puppis has a spectral type of G8II. This means the star is a white to yellow coloured luminous giant star. The star has a B-V Colour Index of 1.11 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,742 Kelvin.

12 Puppis has been calculated as 33.19 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 23,093,161.05.km.

12 Puppis Apparent and Absolute Magnitudes

12 Puppis has an apparent magnitude of 5.09 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 -1.90 If you used the 2007 Parallax value, you would get an absolute magnitude of -1.90. 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 12 Puppis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 4.00 which gave the calculated distance to 12 Puppis as 815.41 light years away from Earth or 250 parsecs. In 2007, Hipparcos data was revised with a new parallax of 4.00 which put 12 Puppis at a distance of 815.41 light years or 250 parsecs.

It would take a spaceship travelling at the speed of light, 815.41 years using the 1997 distance to get there. We don't have the technology or spaceship that can carry people over that distance yet.

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.

12 Puppis Facts

Traditional Name12 Puppis
Short Name12 Pup
Alternative Name(s)12 Puppis
Hipparcos Library I.D.39023
Bonner DurchmusterungBD-22 2104
Gould I.D.230
Henry Draper Designation65699
Celestial TypeStar
Absolute Magnitude-1.90 / -1.90
Apparent Magnitude5.09
Right Ascension (R.A.)07h 59m 05.72
Declination (Dec.)-23 d 18 ` 37.4
1997 Distance from Earth4.00 Parallax (milliarcseconds)
 815.41 Light Years
 250 Parsecs
2007 Distance from Earth4.00 Parallax (milliarcseconds)
 815.41 Light Years
 250 Parsecs
Proper Motion Dec.3.00 ± 0.00 milliarcseconds/year
Proper Motion RA.-11.00 ± 0.00 milliarcseconds/year
B-V Index1.11
Spectral TypeG8II
Colour(G) White to Yellow
Star Typeluminous giant star
Radius (x the Sun)33.19
Calculated Effective Temperature4,742 Kelvin

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