Comet Urata-Niijima is a periodic comet in the Solar System discovered by Japanese astronomers Tsuneo Niijima and Takeshi Urata on October 30, 1986, at Ojima, the first orbit was calculated by Brian G. Marsden on November 5 giving an orbital period of 6.42 years.

Discovered byT. Niijima and T. Urata
Discovery dateOctober 30, 1986
1986 UD, 1993 U1
Orbital characteristics A
EpochNovember 1, 2006
Perihelion1.465 AU
Semi-major axis3.542 AU
Orbital period6.67 a
Last perihelionJune 24, 2013[1]
October 29, 2006
Next perihelion2020-Feb-07[2]

On October 20, 1993, the comet was recovered by J. V. Scotti (Spacewatch, Kitt Peak Observatory, Arizona, United States), and on the next return on March 4, 2000, by Philippe. L. Lamy and Harold. A. Weaver using the Hubble Space Telescope.


  1. ^ Syuichi Nakano (2010-04-08). "112P/Urata-Niijima (NK 1906)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-24.
  2. ^ "112P/Urata-Niijima Orbit". Minor Planet Center. Retrieved 2014-06-17.

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