Astronaut Kimiya Yui captured from ISS the video of Lemmon Comet (C/2025 A6).
C/2025 A6 (Lemmon) is a non-periodic comet discovered by the Mount Lemmon Survey in images obtained on 3 January 2025. It has an inbound orbital period of about 1,350 years and will pass perihelion on 8 November 2025 when it will be 0.53 AU (79 million km; 49 million mi) from the Sun. This perihelion passage will reduce the orbital period to about 1,150 years. It makes its closest approach to Earth on 21 October 2025 and may be visible to the naked eye 42 degrees from the Sun after sunset. As of 20 October 2025, the comet is about apparent magnitude 4.4, and the nucleus and coma are visible in binoculars about midway between Arcturus and the handle of the Big Dipper. On 21 October it will be about 10 degrees from Arcturus, and both Arcturus and the comet may be visible in the same field of view using low power binoculars such as 7x35s.
こちらは、タイムラプス映像です。
レモン彗星が昇ってくる様子を撮影してみました。
短い動画ですが、飛び交う人工衛星達の動きと合わせてお楽しみください！ pic.twitter.com/celSRI1Qys— 油井 亀美也 Kimiya.Yui (@Astro_Kimiya) October 20, 2025
Reference: Kimiya Yui’s Tweet
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