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arXiv 2201.05364astro-ph.EP
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2021年PH27是一颗活跃的小行星,在金星上可以探测到流星雨吗?

Is 2021 PH27 an active asteroid with a meteor shower detectable on Venus?

Albino Carbognani, Paolo Tanga, Fabrizio Bernardi

摘要:

最近发现的近地小行星2021 PH 27是所有已知小行星中轨道周期最短的。不能排除2021 PH 27也是一颗活跃的小行星,即(3200)法厄同。我们打算估计这一假设的后果,虽然测试是困难的,在近日点通道地面观测,由于低太阳伸长率。假设表面活动与法厄同相似,则可以估计亮度增加约1.4等。由于2021 PH 27是一颗与金星的MOID为$0.014660 \pm 0.000034$ AU的小行星,因此它可能相当于地球的法厄同,是金星流星雨的前身。观测金星大气层中假想火球的好机会将发生在2023年6月7日左右,届时金星将以距离2021 PH 27标称轨道最小的距离通过。另一个有利的日期将是2026年7月5日。最后,在2022年3月28日,小行星也将处于太阳最大伸长约$52.3^{\circ}$,并处于其轨道的远日点,这是从测光,偏振和光谱观测的物理角度来表征它的最有利配置。

英文摘要:

The recently discovered near-Earth asteroid 2021 PH27 has the shortest orbital period of all known asteroids. It cannot be excluded that 2021 PH27 is also an active asteroid, as (3200) Phaethon. We intend to estimate the consequences of this hypothesis, although testing is difficult with ground-based observations during perihelion passages, due to low solar elongation. Assuming a surface activity similar to that of Phaethon, an increase in brightness of about 1.4 mag can be estimated. Since it is an asteroid with a MOID of $0.014660 \pm 0.000034$ AU with Venus, 2021 PH27 could be the equivalent of Phaethon for the Earth and be the progenitor body of a venusian meteor shower. A good opportunity to observe the hypothetical fireballs in Venus's atmosphere will take place on the days around Jun 07, 2023, when Venus will pass at the minimum distance from the nominal orbit of 2021 PH27. Another favorable date will be Jul 05, 2026. Finally, on Mar 28, 2022 the asteroid will also be at the maximum Sun elongation of about $52.3^{\circ}$ and at the aphelion of its orbit, the most favorable configuration to characterize it from the physical point of view with photometric, polarimetric and spectroscopic observations.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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