117P/Helin–Roman–Alu

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117P/Helin-Roman-Alu
Discovery
Discovered by Eleanor F. Helin
Brian P. Roman
Jeff Alu
Discovery date October 2, 1989
Alternative
designations
1987 XXXVII
Orbital characteristics A
Epoch March 6, 2006
Aphelion 5.123 AU
Perihelion 3.037 AU
Semi-major axis 4.08 AU
Eccentricity 0.2556
Orbital period 8.24 a
Inclination 8.7080°
Last perihelion March 27, 2014[1]
December 19, 2005
Next perihelion 2022-Jul-07[2]

117P/Helin–Roman–Alu, also known as Helin-Roman-Alu 1, is a periodic comet in the Solar System. It is a Quasi-Hilda comet.[3]

References[edit]

  1. ^ Syuichi Nakano (2011-04-06). "117P/Helin-Roman-Alu 1 (NK 2051)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-20. 
  2. ^ "117P/Helin-Roman-Alu Orbit". Minor Planet Center. Retrieved 2014-06-17. 
  3. ^ Toth, I. (March 2006). "The quasi-Hilda subgroup of ecliptic comets - an update". Astronomy and Astrophysics 448 (3): 1191–1196. Bibcode:2006A&A...448.1191T. doi:10.1051/0004-6361:20053492. 

External links[edit]

Periodic comets (by number)
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116P/Wild
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118P/Shoemaker-Levy