ZTF与ATLAS相遇
(原标题: ZTF meets ATLAS)
2023-02-10
浏览次数: 26
彗星C/2022 E3 （ZTF）与彗星C/2022 U2 （ATLAS）共享这个望远镜框架。2月6日晚，在德国巴伐利亚森林的一个花园天文台拍摄到的御夫座星空的视野跨度约为2.5度。这些长周期彗星是在2022年由天空调查项目（兹威基瞬变设施和小行星对地撞击最后警报系统）发现的，上个月刚刚到达近日点。较暗的彗星ATLAS在1月29日以大约4.6光分的距离接近我们美丽的星球，而彗星ZTF在2月2日的距离仅为2.4光分。这颗彗星ATLAS缺少以前裸眼彗星ZTF的发育良好的尾巴。但这两颗彗星都有淡绿色的彗发，这是双原子碳分子在阳光下发出的荧光。继续在地球的天空中奔跑，今晚，双筒望远镜彗星ZTF将出现在明亮的火星附近。
查看原文解释
Fading as it races across planet Earth's northern skies comet C/2022 E3 (ZTF) shares this telescopic frame with comet C/2022 U2 (ATLAS). Captured on the night of February 6 from a garden observatory in Germany's Bavarian Forest, the starry field of view toward the constellation Auriga spans about 2.5 degrees. Discovered by sky survey projects in 2022 (the Zwicky Transient Facility and the Asteroid Terrestrial-impact Last Alert System) these long-period comets are outbound, reaching perihelion just last month. The much fainter comet ATLAS made its closest approach to our fair planet on January 29 at a distance of about 4.6 light-minutes, compared to a mere 2.4 light-minutes for comet ZTF on February 2. This comet ATLAS lacks the well-developed tails of the formerly naked-eye comet ZTF. But both comets sport greenish tinted comas, emission from diatomic carbon molecules fluorescing in sunlight. Continuing its dash across planet Earth's sky, the good-binocular comet ZTF will appear close to bright planet Mars tonight.
© Stefan Bemmerl