astro.wikisort.org - Comet

25D/Neujmin, otherwise known as Comet Neujmin 2, is a periodic comet in the Solar System discovered by Grigory N. Neujmin (Simeis) on February 24, 1916.[2] It was last observed on February 10, 1927.[3]

25D/Neujmin

Discovery
Discovered by	Grigory Neujmin
Discovery date	24 February 1916
Orbital characteristics A
Epoch	31 December 1926
Aphelion	4.84 AU
Perihelion	1.338 AU
Semi-major axis	3.089 AU
Eccentricity	0.567
Orbital period	5.43 yr
Inclination	10.638°
Last perihelion	18 August 2019[1] (unobserved)
Next perihelion	11 May 2025[1] (Lost since 1927)

It was confirmed by George Van Biesbroeck (Yerkes Observatory, Wisconsin, United States) and Frank Watson Dyson (Greenwich Observatory, England) on March 1.[2]

A prediction by Andrew Crommelin (Royal Observatory, Greenwich, England) for 1921 was considered unfavourable and no observations were made. The comet was recovered in 1926.[3] Searches in 1932 and 1937 were unsuccessful.[2]

Consequently, this comet has remained a lost comet since 1927. As of 2019^[update] and using the JPL Horizons nominal orbit, the comet is still expected to come to perihelion around 1.3 AU from the Sun.

References

External links

• Orbital simulation from JPL (Java) / Horizons Ephemeris
• 25D at Kronk's Cometography
• 25D at Kazuo Kinoshita's Comets
• 25D at Seiichi Yoshida's Comet Catalog

Numbered comets
Previous 24P/Schaumasse	25D/Neujmin	Next 26P/Grigg–Skjellerup

На других языках

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- [en] 25D/Neujmin

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[ru] 25D/Неуймина

Комета Неуймина 2 (25D/Neujmin) — короткопериодическая комета из семейства Юпитера, которая была открыта 24 февраля 1916 года советским астрономом Григорием Неуйминым в Симеизской обсерватории. Она была описана как диффузный объект 11,0 m звёздной величины. Открытие было подтверждено 1 марта Жоржем Ван Бисбруком (Йеркская обсерватория) и Фрэнком Дайсоном (Гринвичская обсерватория). Комета обладает довольно коротким периодом обращения вокруг Солнца — чуть более 5,4 года.

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