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Title: 157P/Tritton  
Author: World Heritage Encyclopedia
Language: English
Subject: Vesta (spacecraft), Comets, 158P/Kowal–LINEAR, Antitail, Comet Ikeya–Murakami
Collection: Comets, Periodic Comets
Publisher: World Heritage Encyclopedia


Discovered by Keith P. Tritton
Discovery date February 11, 1978
1977 XIII
Orbital characteristics A
Epoch March 6, 2006
Aphelion 5.503 AU
Perihelion 1.415 AU
Semi-major axis 3.459 AU
Eccentricity 0.5909
Orbital period 6.433 a
Inclination 7.1263°
Last perihelion February 20, 2010
Next perihelion June 10, 2016[1]

157P/Tritton is a periodic comet in the solar system.


  • Discovery 1
    • Historical Highlights 1.1
  • References 2
  • External links 3


Keith Tritton (U. K. Schmidt Telescope Unit, Coonabarabran) discovered this comet on a deep IIIa-J exposure made with the 122-cm Schmidt telescope on 1978 February 11.66. [3]

Historical Highlights

  • The first orbit was calculated by M. P. Candy using positions obtained by Tritton on February 11, 13, and 15. It was an elliptical orbit with a perihelion date of 1977 October 30.07 and an orbital period of 7.30 years. B. G. Marsden revised the orbit using five positions spanning the period of February 11 to March 13. He also gave an elliptical orbit with a perihelion date of October 28.51 and an orbital period of 6.33 years.
  • Apparition of 1978: Moonlight made observations impossible during the last half of February and during the early days of March; however, the comet was found by J. H. Bulger (Harvard Observatory's Agassiz Station) on March 10.27. He gave the nuclear magnitude as 20. The last three observations of the comet were obtained by Shao on March 11.28, 13.20, and 14.21. On IAU Circular No. 3194, issued on 1978 March 15, Marsden wrote, "It is possible that the comet experienced an outburst around the time of the Harvard observation on Feb. 15...." No observations were obtained thereafter.[4]


  1. ^  
  2. ^   (Observer Location:@sun)
  3. ^
  4. ^

External links

  • Orbital simulation from JPL (Java) / Horizons Ephemeris
  • 157P/Tritton – Seiichi Yoshida @
  • 157P at Gary W. Kronk's Cometography
Periodic comets (by number)
157P/Tritton Next
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