2023年01月31日:ZTF彗星的三重景观(A Triple View of Comet ZTF)
A Triple View of Comet ZTF
Image Credit & Copyright: Javier Caldera & Miguel Gracia
Explanation: Comet ZTF has a distinctive shape.The now bright comet visiting the inner Solar System has been showing not only a common dust tail,ion tail, and green gas coma, but also an uncommonly distinctive antitail.The antitail does not actually lead the comet -- it is just that the head of the comet is seen superposed on part of the fanned-out and trailing dust tail. The giant dirty snowball that is Comet C/2022 E3 (ZTF) has now passed its closest to the Sun and tomorrow will pass its closest to the Earth.The main panel of the featured triple image shows how Comet ZTF looked last week to the unaided eye under a dark and clear sky over Cáceres, Spain. The top inset image shows how the comet looked through binoculars, while the lower inset shows how the comet looked through a small telescope. The comet is now visible all night long from northern latitudes but will surely fade from easy observation during the next few weeks.
影像提供與版權: Javier Caldera & Miguel Gracia
说明: ZTF彗星具有很独特的形状。这颗目前在造访太阳系内围的明亮彗星，除了曳着常见的尘尾、离子尾和泛绿的气体彗发之外，而且还带着不寻常的反彗尾。反彗尾其实并未落在前方引导彗星前行，此例所示的是彗星的头部叠合在坠后的扇形尘尾上，让尘尾看似分成前后二道。彗星C/2022 E3 （ZTF）这颗庞大的髒雪球，如今已通过它最靠近太阳的近日点，将在明天来到离地球最近的位置。这张三重主题图板 的主要影像，呈现了上週在西班牙．卡塞雷斯幽暗清朗天空下肉眼所见的ZTF彗星。上侧的嵌图呈现这颗彗星透过双筒望远镜所见到的景观，而下侧嵌图则是透过小望远镜所见。这颗彗星目前在北半球彻夜可见，不过在接下来的数週之内，它肯定会变暗并且从容易观测之列除名。