APOD251226 3I ATLAS 近掠事件
3I ATLAS 近掠事件
图像提供 & 版权[1]: Dan Bartlett[2]
英文原文:Explanation: Attention grabbing interstellar visitor 3I ATLAS made its not-so-close flyby of our fair planet on December 19 at a distance of 1.8 astronomical units. That's about 900 light-seconds. Still, this deep exposure captures the comet from another star system as it gently swept across a faint background of stars in the constellation Leo about 4 days earlier, on the night of December 15. Though faint, colors emphasized in the image data, show off the comet's yellowish dust tail and bluish ion tail along with a greenish tinged coma. And even while scrutinized by arrays of telescopes and spacecraft from planet Earth, 3I ATLAS is headed out of the Solar System. It's presently moving outward along a hyperbolic trajectory at about 64 kilometers per second relative to the Sun, too fast to be bound the Sun's gravity. 说明: 引人注目的星际[3]访客3I ATLAS[4]于12月19日以1.8天文单位的距离掠过我们美丽的星球。 这大约相当于[5]900光秒。 尽管如此,这张深度曝光照片[6]捕捉到了这颗来自另一个恒星系统的彗星,它大约在4天前的12月15日晚上,轻轻掠过[7]狮子座一片昏暗的星空背景。 虽然图像很暗淡,但图像数据中色彩的增强,展现了彗星淡黄色的尘埃尾、淡蓝色的离子尾以及略带绿色的彗发。 即使地球上的望远镜和太空船数组都在仔细观察[8],3I ATLAS正朝着太阳系外进发。 它目前正沿着双曲线轨道[9]向外移动,相对于太阳的速度约为每秒64公里,速度之快,使其无法被太阳的重力束缚。
明日的图片: Apollo's Moonship[10]
Authors & editors: Robert Nemiroff[11] (MTU[12]) & Jerry Bonnell[13] (UMCP[14])
NASA Official: Amber Straughn Specific rights apply[15].
NASA Web Privacy[16], Accessibility[17], Notices[18];
A service of: ASD[19] at NASA[20] / GSFC[21],
NASA Science Activation[22]
& Michigan Tech. U.[23]
太空天文实验室(成功大学物理系)
<br/> 编辑:<a href="mailto:hantzong.su@gmail.com" style="color:gray;" target="_blank">苏汉宗</a>
编辑:陈炳志[24]
[1]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[2]https://www.astrobin.com/users/h2ologg/
[3]https://science.nasa.gov/solar-system/comets/3i-atlas/3i-atlas-facts-and-faqs/
[4]https://en.wikipedia.org/wiki/3I/ATLAS
[5]https://en.wikipedia.org/wiki/Astronomical_unit
[6]https://app.astrobin.com/i/vnsgps?r=0
[7]https://app.astrobin.com/i/991zqj
[8]https://science.nasa.gov/solar-system/comets/3i-atlas/comet-3i-atlas-image-gallery/
[9]https://theskylive.com/3dsolarsystem?obj=c2025n1
[10]http://apod.nasa.gov/apod/ap251227.html
[11]http://www.phy.mtu.edu/faculty/Nemiroff.html
[13]https://antwrp.gsfc.nasa.gov/htmltest/jbonnell/www/bonnell.html
[15]http://apod.nasa.gov/apod/lib/about_apod.html#srapply
[16]https://www.nasa.gov/about/highlights/HP_Privacy.html
[17]https://www.nasa.gov/general/accessibility/
[18]https://www.nasa.gov/privacy/
[19]https://astrophysics.gsfc.nasa.gov/
[21]https://www.nasa.gov/centers/goddard/
[22]https://science.nasa.gov/learners
[24]mailto:alfred@ncku.edu.tw
http://apod.nasa.gov/apod/ap251226.html
http://sprite.phys.ncku.edu.tw/astrolab/mirrors/apod/ap251226.html