We present measurements of comet 46P/Wirtanen obtained by the NEOWISE spacecraft in 2017 through 2019. We detected signal in excess of the dust in the 4.6 μm channel attributable to the presence of CO, or more likely, CO₂ emission. The excess, when the comet was outbound at a heliocentric distance of 1.9 au, was consistent with a CO₂ production rate of 1.3(0.07) 10²⁶ molecules per second, which is equivalent to an active area on the order of a percent of the comet nucleus’ total surface.

中文翻译：

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NEOWISE在 2018-2019 年出现期间观察到46P/Wirtanen 的CO 和 CO ₂生产率于 2020 年 9 月 30 日发布。

我们彗星46P的本测量/ Wirtanen在2017年到2019年获得由NEOWISE航天器，我们检测到的信号超过在4.6灰尘μ米通道归属于CO的存在，或更可能的CO ₂排放。当彗星以 1.9 au 的日心距离向外飞出时，多余的部分与每秒 1.3(0.07) 10 ^{26 个}分子的 CO ₂生成率一致，这相当于活跃区域的百分比彗核的总表面。