25D/Neujmin

25D/Neujmin
Discovery
Discovered byGrigory Neujmin
Discovery date24 February 1916
Orbital characteristics
Epoch31 December 1926
Aphelion4.84 AU
Perihelion1.338 AU
Semi-major axis3.089 AU
Eccentricity0.567
Orbital period5.43 yr
Inclination10.638°
Last perihelion18 August 2019[1]
(unobserved)
Next perihelion11 May 2025[1]
(Lost since 1927)

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]

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 and using the JPL Horizons nominal orbit, the comet is still expected to come to perihelion around 1.3 AU from the Sun.

  1. ^ a b Cite error: The named reference Yoshida was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference kronk was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference MPC was invoked but never defined (see the help page).