出站彗星ZTF
(原标题: Outbound Comet ZTF)
2023-03-24
浏览次数: 20
曾经的北方天空宠儿彗星C/2022E3 （ZTF）已经褪色。2月初，ZTF彗星最接近我们美丽的星球时，距离我们只有2.3光分。这颗来自遥远的奥尔特云的彗星当时被称为“绿色彗星”，现在距离我们有13.3光分的距离。在这张拍摄于3月21日的深度照片中，这颗彗星仍然有着宽阔的白色尘埃尾巴和淡绿色的彗发。在离猎户座明亮的恒星参宿七不远的天空中，彗星ZTF与暗淡的尘埃星云和遥远的背景星系共享视野。远摄框中挤满了朝向仙女座方向的银河系恒星。当ZTF向内太阳系移动时，木星的引力对彗星轨道的影响可能使彗星开始了一段出站之旅，再也不会回来了。
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Former darling of the northern sky Comet C/2022E3 (ZTF) has faded. During its closest approach to our fair planet in early February Comet ZTF was a mere 2.3 light-minutes distant. Then known as the green comet, this visitor from the remote Oort Cloud is now nearly 13.3 light-minutes away. In this deep image, composed of exposures captured on March 21, the comet still sports a broad, whitish dust tail and greenish tinted coma though. Not far on the sky from Orion's bright star Rigel, Comet ZTF shares the field of view with faint, dusty nebulae and distant background galaxies. The telephoto frame is crowded with Milky Way stars toward the constellation Eridanus. The influence of Jupiter's gravity on the comet's orbit as ZTF headed for the inner solar system, may have set the comet on an outbound journey, never to return.
© Former darling