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1 Leporis, HD32503, HIP23474, HR1634

1 Leporis is a orange to red star that can be located in the constellation of Lepus. The star can be seen with the naked eye, that is, you don't need a telescope/binoculars to see it.

The Id of the star in the Yale Bright Star Catalogue is HR1634. HIP23474 is the reference name for the star in the Hipparcos Star Catalogue. The Id of the star in the Henry Draper catalogue is HD32503.

Location of 1 Leporis

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 1 Leporis, the location is 05h 02m 44.94 and -22d 47` 42.3 .

Proper Motion of 1 Leporis

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 14.15 ± 0.40 miliarcseconds/year towards the north and 63.43 ± 0.59 miliarcseconds/year east if we saw them in the horizon. The Radial Velocity, that is the speed at which the star is moving away/towards us is 33.00000 km/s with an error of about 1.10 km/s .

Physical Properties (Colour, Temperature, Radius) of 1 Leporis

1 Leporis has a spectral type of K1IV. This means the star is a orange to red star. The star is 7487.00000000 Parsecs from the Galactic Centre or terms of Light Years is 24419.8495652800000000s. The star has a B-V Colour Index of 1.18 which means the star's temperature has been calculated using information from Morgans @ Uni.edu at being 4,524 Kelvin.

1 Leporis Radius has been calculated as being 17.37 times bigger than the Sun.The Sun's radius is 695,800km, therefore the star's radius is an estimated 12,087,750.43.km. However with the 2007 release of updated Hipparcos files, the radius is now calculated at being round 15.48. The figure is derived at by using the formula from SDSS and has been known to produce widely incorrect figures.

1 Leporis Apparent and Absolute Magnitudes

1 Leporis has an apparent magnitude of 5.74 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 -0.29 If you used the 2007 Parallax value, you would get an absolute magnitude of -0.04. 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 1 Leporis

Using the original Hipparcos data that was released in 1997, the parallax to the star was given as 6.22 which gave the calculated distance to 1 Leporis as 524.38 light years away from Earth or 160.77 parsecs. It would take a spaceship travelling at the speed of light, 524.38 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 6.97 which put 1 Leporis at a distance of 467.95 light years or 143.47 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 7,487.00 Parsecs or 24,419.85 Light Years. The Galacto-Centric Distance is the distance from the star to the Centre of the Galaxy which is Sagittarius A*.

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.

1 Leporis Facts

Alternative Names

Traditional/Proper Name1 Leporis
Flamsteed Name1 Leporis
Flamsteed Short Name1 Lep
Hipparcos Library I.D.23474
Yale Bright Star Catalogue (HR) Id1634
Henry Draper Designation32503

Visual Facts

Star Type star
Absolute Magnitude-0.29 / -0.04
Visual / Apparent Magnitude5.74
Naked Eye VisibleYes - Magnitudes
Right Ascension (R.A.)05h 02m 44.94
Declination (Dec.)-22d 47` 42.3
Galactic Latitude-33.46 degrees
Galactic Longitude223.49 degrees
1997 Distance from Earth6.22 Parallax (milliarcseconds)
 524.38 Light Years
 160.77 Parsecs
2007 Revised Distance from Earth6.97 Parallax (milliarcseconds)
 467.95 Light Years
 143.47 Parsecs
Galacto-Centric Distance24,419.85 Light Years / 7,487.00 Parsecs
Proper Motion Dec.14.15 ± 0.40 milliarcseconds/year
Proper Motion RA.63.43 ± 0.59 milliarcseconds/year
B-V Index1.18
Radial Velocity33.00 ± 1.10 km/s
Spectral TypeK1IV
Colour(K) Orange to Red

Estimated Facts

Calculated Effective Temperature4,524 Kelvin

Sources and Links

SIMBAD SourceLink

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