Английская Википедия:(248370) 2005 QN173
Шаблон:Use dmy dates Шаблон:Infobox planet
Шаблон:Mp is a main belt asteroid that undergoes recurrent comet-like activity near perihelion,[1][2] and is now designated comet Шаблон:Mp.[3] This object was discovered on 29 August 2005 by the Near-Earth Asteroid Tracking program at Palomar Observatory.[4] It orbits in the outer main asteroid belt[5] with an orbital period of 5.36 years, a semi-major axis of Шаблон:Val, and an orbital eccentricity of 0.225, bringing it as close as Шаблон:Val to the Sun at perihelion. The orbital plane is inclined at an angle of 0.068° to the ecliptic.[6]
On 7 July 2021, Шаблон:Mp was found to be active by the Asteroid Terrestrial-impact Last Alert System survey.[3] Archival imagery showed it had been active during a previous perihelion passage,[7] dated 22 July 2016.[8] This indicates the activity is due to the sublimation of icy volatiles,[3] as is common with comets.[8] At the time that activity was identified, the object displayed a long, dusty tail, much like a comet. Follow up observations found this tail extended more than Шаблон:Val along its orbital plane.[5] By 14 August 2021, the coma around the nucleus was fading, while the brightness of the tail remained roughly constant.[3]
This asteroid has a diameter of Шаблон:Val, with a low visual albedo of Шаблон:Val. Its colors are consistent with a dark C-type carbonaceous asteroid taxonomic classification, which is class more commonly found in the outer main belt. Dust particles ejected from the object had very low velocities of about Шаблон:Val. This suggests that the dust emission may have been assisted by rapid spin of the asteroid, which would lower the escape velocity.[9]
The asteroid will make its next perihelion passage on 3 September 2026, and it may become active by February 2026.[9]
References
Further reading
Шаблон:Minor planets navigator Шаблон:Small Solar System bodies Шаблон:Authority control
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