Albireo, Beta Cygni
Numéro d’image : 12631917
| Beta Cygni is Albireo, is a gold and blue double star in the head of Cygnus, the Swan. It is located 434 light-years from Earth. It is unknown if Albireo is a true gravitationally bound binary-star system or just an optical double where the two stars happen to line up along the same line of sight by chance. If it is a true double star, the orbital period must be very long. The apparent separation of the two stars is 34.7 arcseconds with a position angle of 55 degrees. Albireo A, the brighter of the two stars, is a golden yellow-giant star with a spectral class of K3. Albireo B, has a B8 spectral classification. Albireo B was also discovered to be a double star itself with a separation of only 0.4 arcseconds. Part of the stunning visual beauty of Albireo is the color contrast of the two stars, which is real, but exaggerated by human visual perception. Albireo's brightness, color, and large separation make it an outstanding showcase object for small | |
| Licence : | Droits gérés |
| Crédit: | Science Photo Library / Lodriguss, Gerard |
| Taille de l’image : | 5182 px × 3454 px |
| Model Release : | Non requis |
| Property Release : | Non requis |
| Restrictions : | - |
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