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CW Leonis

CW Leonis Facts

Location of CW Leonis

The location of the carbon star in the night sky 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 object is compared to the celestial equator and is expressed in degrees. For CW Leonis, the location is 09h 47m 57.4 and +13° 16` 43.56 .

Proper Motion of CW Leonis

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 12.00 miliarcseconds/year towards the north and 35.00 miliarcseconds/year east if we saw them in the horizon. . When the value is negative then the star and the Sun are getting closer to one another, likewise, a positive number means that two stars are moving away. Its nothing to fear as the stars are so far apart, they won't collide in our life-time, if ever.

Physical Properties (Colour, Mass) of CW Leonis

CW Leonis has a spectral type of C9,5E. This means the star is a carbon red carbon star. The star's solar mass is 0.70 times that of the Sun's. The Sun's Mass is 1,989,100,000,000,000,000,000 billion kg. which to calculate using this website is too large. To give idea of size, the Sun is 99.86% the mass of the solar system.

CW Leonis Apparent and Absolute Magnitudes

CW Leonis has an apparent magnitude of 10.96 which is how bright we see the star from Earth. Apparent Magnitude is also known as Visual Magnitude. 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.

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Additional CW Leonis Facts and Figures

Visual Facts


Primary / Proper / Traditional NameCW Leonis
Spectral TypeC9,5E
Constellation's Main StarNo
Multiple Star SystemNo / Unknown
Star TypeCarbon Star
ColourRed
GalaxyMilky Way
ConstellationLeo
Visual / Apparent Magnitude10.96
Naked Eye VisibleRequires a 4.5 - 6 Inch Telescope - Magnitudes
Right Ascension (R.A.)09h 47m 57.4
Declination (Dec.)+13° 16` 43.56
Proper Motion Dec.12.00 milliarcseconds/year
Proper Motion RA.35.00 milliarcseconds/year

Companions (Multi-Star and Exoplanets) Facts


Exoplanet CountNone/Unaware

Estimated Calculated Facts


Radius (x the Sun)0.00
Mass Compared to the Sun0.70

Sources and Links


Sourcehttps://en.wikipedia.org/wiki/CW_Leonis

Location of CW Leonis in Leo


CW Leonis Location in Leo

The map was generated using Night Vision, an awesome free application by Brian Simpson.

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