161P/Hartley–IRAS is a periodic comet with an orbital period of 21 years. It fits the classical definition of a Halley-type comet with (20 years < period < 200 years).[6]

161P/Hartley-IRAS
Discovery
Discovered byMalcolm Hartley
IRAS
Discovery dateNovember 4, 1983
Alternative
designations
1984 III; 2004 V2
Orbital characteristics A
EpochMarch 6, 2006
Aphelion14.19 AU
Perihelion1.275 AU
Semi-major axis7.734 AU
Eccentricity0.8351
Orbital period21.51 yr
Inclination95.6899°
Last perihelionJune 20, 2005
Next perihelion2026 Oct. 29[1]
2026 Nov. 27[2][3][4]
2026 December 18[5]

ReferencesEdit

  1. ^ Syuichi Nakano (2005-06-21). "161P/Hartley-IRAS (NK 1184)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
  2. ^ "161P/Hartley-IRAS Orbit". Minor Planet Center. Retrieved 2014-06-18.
  3. ^ Seiichi Yoshida (2006-07-16). "161P/Hartley-IRAS". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-19.
  4. ^ Horizons output. "Observer Table for Comet 161P/Hartley-IRAS". Retrieved 2011-06-13. (Observer Location:@sun)
  5. ^ Patrick Rocher (2005-10-12). "Note number : 0132 P/Hartley-IRAS : 161P". Institut de mécanique céleste et de calcul des éphémérides. Retrieved 2012-02-19.
  6. ^ "JPL Small-Body Database Browser: 161P/Hartley-IRAS" (2005-10-12 last obs). Jet Propulsion Laboratory. Retrieved 2012-07-26.

External linksEdit

Numbered comets
Previous
160P/LINEAR
161P/Hartley–IRAS Next
162P/Siding Spring