Gienah
Above:Front view
Click a thumbnail to see its larger version and description.
Gamma Corvi (γ Corvi, abbreviated Gamma Crv, γ Crv) is a binary star and the brightest star in the southern constellation of Corvus, having an apparent visual magnitude of 2.59. The system's two components are designated Gamma Corvi A (officially named Gienah /ˈdʒiːnə/). The distance to this system has been measured directly using the parallax technique, yielding an estimated 154 light-years (47 parsecs) from the Sun. Gamma Corvi bore the traditional name of Gienah derived from Arabic, from Ulugh Beg's الجناح الغراب اليمن al-janāħ al-ghirāb al-yaman, meaning "the right wing of the crow", although on modern charts it marks the left wing. Gienah A is a giant star with a stellar classification of B8 III and has approximately 4.2 times the mass of the Sun. It has a blue-white hue. The spectrum of this star displays an anomalously higher than normal abundance of the elements mercury and manganese, making this a Mercury-manganese star. However, there are other elements that show large over or under abundances. This chemical peculiarity in an otherwise stable stellar atmosphere is most likely caused by separation of the elements through diffusion and gravitational settling. It has a confirmed stellar companion with a mass of about 0.8 times the Sun's, which may be orbiting at a separation of around 50 AU over a 158-year period.[6] The photometry for Gamma Corvi B suggests a stellar classification in the range K5–M5 V. Size: 80 x 115 mm Links
 Contributors
No one has contributed to this page yet! Collections No one has added this puzzle to a collection yet! Found a mistake or something missing? Edit it yourself or contact the moderator. |
|