参宿四黯然失色
(原标题: Betelgeuse Eclipsed)
2023-12-15
浏览次数: 20
12月12日，小行星319利昂娜从明亮的参宿四前经过，在地球上投下阴影。但这次要想看到大家最喜欢的红巨星褪色，你必须站在狭窄的阴影路径的中心线附近，从墨西哥中部开始，向东延伸，穿过佛罗里达州南部、大西洋、南欧和欧亚大陆。这两个以地球为中心的天体事件是在西班牙阿莫多瓦del b里约热内卢拍摄的，分别是在小行星掩星之前（左图）和掩星期间。在这两幅图中，参宿四位于我们熟悉的猎户座的上方和左侧。在极其罕见的掩星过程中，它的亮度明显减弱，在几秒钟内，这颗巨星被一颗直径约60公里的主带小行星短暂遮蔽。
查看原文解释
Asteroid 319 Leona cast a shadow across planet Earth on December 12, as it passed in front of bright star Betelgeuse. But to see everyone's favorite red giant star fade this time, you had to stand near the center line of the narrow shadow path starting in central Mexico and extending eastward across southern Florida, the Atlantic Ocean, southern Europe, and Eurasia. The geocentric celestial event was captured in these two panels taken at Almodovar del Rio, Spain from before (left) and during the asteroid-star occultation. In both panels Betelgeuse is seen above and left, at the shoulder of the familiar constellation Orion. Its brightness diminishes noticeably during the exceedingly rare occultation when, for several seconds, the giant star was briefly eclipsed by a roughly 60 kilometer diameter main-belt asteroid.
© Sebastian Voltmer