麦克诺特彗星壮丽的尾巴
(原标题: The Magnificent Tail of Comet McNaught)
2024-10-06
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麦克诺特彗星，2007年的大彗星，长出了一条非常长的丝状尾巴。这条壮丽的尾巴横跨天空，在日落之后的几天里，南半球的观测者都能看到它。在长时间的广角相机曝光下，惊人的离子尾显示出最大的程度。在某些时候，对于许多北方的观测者来说，只有尾巴本身在地平线上是可见的。彗星C/2006 P1（麦克诺特）的峰值亮度估计达到了-5等（-5等），这是彗星的发现者在2007年1月日落之后从澳大利亚赛丁泉天文台拍摄的特色图像。麦克诺特彗星是几十年来最亮的彗星，随着它向南方天空移动，远离太阳和地球，它的亮度也随之下降。在接下来的一个月里，2024年大彗星的候选者——冢山-阿特拉斯彗星，应该会展示它在地球上可以看到的最壮观的彗尾。
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Comet McNaught, the Great Comet of 2007, grew a spectacularly long and filamentary tail. The magnificent tail spread across the sky and was visible for several days to Southern Hemisphere observers just after sunset. The amazing ion tail showed its greatest extent on long-duration, wide-angle camera exposures. During some times, just the tail itself was visible just above the horizon for many northern observers as well. Comet C/2006 P1 (McNaught), estimated to have attained a peak brightness of magnitude -5 (minus five), was caught by the comet's discoverer in the featured image just after sunset in January 2007 from Siding Spring Observatory in Australia. Comet McNaught, the brightest comet in decades, then faded as it moved further into southern skies and away from the Sun and Earth. Over the next month, Comet Tsuchinshan–ATLAS, a candidate for the Great Comet of 2024, should display its most spectacular tails visible from the Earth.
© Robert H. McNaught