Английская Википедия:C/2021 T4 (Lemmon)
C/2021 T4 (Lemmon) is an inbound long period comet discovered by the Mount Lemmon Observatory on 7 October 2021.[1] This passage through the planetary region of the Solar System will reduce the orbital period from millions of years to thousands of years.[2]
It has been south of the celestial equator since October 2022. On 13 June it was 1.5 degrees from magnitude 2 Beta Ceti. Closest approach to Earth was on 20 July 2023 at a distance of Шаблон:Convert.[3] The next day it reached its southernmost declination, at -56 degrees. On 25 July it passed next to the globular cluster NGC 6397.[4] It reached perihelion on 31 July 2023 at a solar distance of 1.48 AU. The comet brightened to around apparent magnitude 8.[5]
References
Шаблон:Comets Шаблон:2021 in space Шаблон:2023 in space Шаблон:Authority control
- ↑ Ошибка цитирования Неверный тег
<ref>; для сносокMPCне указан текст - ↑ Ошибка цитирования Неверный тег
<ref>; для сносокbarycenterне указан текст - ↑ Earth Approach 2023 (delta. Close approach occurs when deldot flips from negative to positive.)
- ↑ Шаблон:Cite web
- ↑ C/2021 T4 ( Lemmon ) mag chart by Seiichi Yoshida
