25D/Neujmin

25D/Neujmin
Discovery
Discovered by	Grigory Neujmin
Discovery date	February 24, 1916
Orbital characteristics A
Epoch	December 31, 1926
Perihelion	1.338 AU
Semi-major axis	3.089 AU
Eccentricity	0.567
Orbital period	5.43 a
Inclination	11.75°
Last perihelion	2014 Mar. 12(?); (unobserved)
Next perihelion	Lost

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.

It was confirmed by George van Biesbroeck (Yerkes Observatory, Wisconsin, USA) and Frank Watson Dyson (Greenwich Observatory, England) on March 1.

A prediction by Andrew Crommelin (Royal Observatory, Greenwich, England) for 1921 was considered unfavourable and no observations were made. The next prediction for 1927 took into account an unnamed object observed in 1920, but despite searches, nothing was seen.

Consequently, this comet has remained a lost comet since 1927.