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Title: 121P/Shoemaker–Holt  
Author: World Heritage Encyclopedia
Language: English
Subject: Comets, 122P/de Vico, Antitail, Comet Ikeya–Murakami, C/1989 X1
Publisher: World Heritage Encyclopedia


Discovered by Carolyn S. Shoemaker
Eugene Merle Shoemaker
Henry E. Holt
Discovery date March 9, 1989
1988 XI; 1995 Q3
Orbital characteristics A
Epoch March 6, 2006
Aphelion 5.376 AU
Perihelion 2.65 AU
Semi-major axis 4.013 AU
Eccentricity 0.3396
Orbital period 8.039 a
Inclination 17.7218°
Last perihelion September 8, 2013[1]
September 1, 2004
Next perihelion 2023-Jun-28[2]

121P/Shoemaker–Holt, also known as Shoemaker-Holt 2, is a periodic comet in the solar system.


  1. ^  
  2. ^ "121P/Shoemaker-Holt Orbit".  

External links

  • Orbital simulation from JPL (Java) / Horizons Ephemeris
  • 121P/Shoemaker-Holt 2 – Seiichi Yoshida @
  • 121P at Kronk's Cometography
Periodic comets (by number)
121P/Shoemaker–Holt Next
122P/de Vico
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