法厄同的窝
(原标题: Phaethon's Brood)
2024-12-12
浏览次数: 18
根据其精确测量的轨道，3200 Phaethon（听起来像FAY-eh-thon）被认为是造成每年双子座流星雨的流星体流的来源。尽管大多数流星雨的母体都是彗星，3200法厄同是一颗已知的近地小行星，轨道周期为1.4年。它的近日点或最接近太阳的地方是在最里面的行星水星的轨道内。在这张望远镜视野中，这颗小行星在英仙座暗淡的背景恒星上快速运动，在两分钟的总曝光时间内留下了一条短迹。它的流星子星（微弱的）平行条纹在整个场景中闪烁得更快。这张全家福是在2017年12月13日双子座流星雨非常活跃的高峰附近拍摄的。就在3200年法厄同历史性的近距离接近地球前三天。今年，12月13日晚上将再次看到双子座流星雨的高峰，但微弱的流星将被近满月的明亮光芒所掩盖。观看：2024年双子座流星雨
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Based on its well-measured orbit, 3200 Phaethon (sounds like FAY-eh-thon) is recognized as the source of the meteoroid stream responsible for the annual Geminid meteor shower. Even though most meteor shower parents are comets, 3200 Phaethon is a known and closely tracked near-Earth asteroid with a 1.4 year orbital period. Rocky and sun-baked, its perihelion or closest approach to the Sun is well within the orbit of innermost planet Mercury. In this telescopic field of view, the asteroid's rapid motion against faint background stars of the heroic constellation Perseus left a short trail during the two minute total exposure time. The (faint) parallel streaks of its meteoric children flashed much more quickly across the scene. The family portrait was recorded near the Geminid meteor shower's very active peak on 2017 December 13. That was just three days before 3200 Phaethon's historic close approach to planet Earth. This year, the night of December 13 should again see the peak of the Geminid meteor shower, but faint meteors will be washed out by the bright light of the nearly full moon. Watch: The 2024 Geminid Meteor Shower
© Mikiya Sato