161P/Hartley–IRAS

161P/Hartley-IRAS
Discovery
Discovered by	Malcolm Hartley; IRAS
Discovery date	November 4, 1983
Alternative; designations	1984 III; 2004 V2
Orbital characteristics A
Epoch	March 6, 2006
Aphelion	14.19 AU
Perihelion	1.275 AU
Semi-major axis	7.734 AU
Eccentricity	0.8351
Orbital period	21.51 yr
Inclination	95.6899°
Last perihelion	June 20, 2005
Next perihelion	2026 Oct. 29; 2026 Nov. 27; 2026 December 18

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]

This was one of six comets discovered by the infrared space telescope IRAS, in 1983.^[7]^[8]

References[]

^ Syuichi Nakano (2005-06-21). "161P/Hartley-IRAS (NK 1184)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
^ "161P/Hartley-IRAS Orbit". Minor Planet Center. Retrieved 2014-06-18.
^ Seiichi Yoshida (2006-07-16). "161P/Hartley-IRAS". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-19.
^ Horizons output. "Observer Table for Comet 161P/Hartley-IRAS". Retrieved 2011-06-13. (Observer Location:@sun)
^ Patrick Rocher (2005-10-12). "Note number : 0132 P/Hartley-IRAS : 161P". . Retrieved 2012-02-19.
^ "JPL Small-Body Database Browser: 161P/Hartley-IRAS" (2005-10-12 last obs). Jet Propulsion Laboratory. Retrieved 2012-07-26.
^ Schmadel, Lutz D. (2007). "(3728) IRAS". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 315. doi:10.1007/978-3-540-29925-7_3725. ISBN 978-3-540-00238-3.
^ "1986QJRAS..27..102M Page 102". adsabs.harvard.edu. Retrieved 2019-09-30.

External links[]

Orbital simulation from JPL (Java) / Horizons Ephemeris
161P/Hartley-IRAS – Seiichi Yoshida @ aerith.net
161P at Kronk's Cometography

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

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[NK1184-1] Syuichi Nakano (2005-06-21). "161P/Hartley-IRAS (NK 1184)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.

[MPC-2] "161P/Hartley-IRAS Orbit". Minor Planet Center. Retrieved 2014-06-18.

[Yoshida-161p-3] Seiichi Yoshida (2006-07-16). "161P/Hartley-IRAS". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-19.

[horizons-4] Horizons output. "Observer Table for Comet 161P/Hartley-IRAS". Retrieved 2011-06-13. (Observer Location:@sun)

[imcce-5] Patrick Rocher (2005-10-12). "Note number : 0132 P/Hartley-IRAS : 161P". . Retrieved 2012-02-19.

[jpldata-6] "JPL Small-Body Database Browser: 161P/Hartley-IRAS" (2005-10-12 last obs). Jet Propulsion Laboratory. Retrieved 2012-07-26.

[springer-7] Schmadel, Lutz D. (2007). "(3728) IRAS". Dictionary of Minor Planet Names. Springer Berlin Heidelberg. p. 315. doi:10.1007/978-3-540-29925-7_3725. ISBN 978-3-540-00238-3.

[8] "1986QJRAS..27..102M Page 102". adsabs.harvard.edu. Retrieved 2019-09-30.

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Discovery
Discovered by	Malcolm Hartley IRAS
Discovery date	November 4, 1983
Alternative designations	1984 III; 2004 V2
Orbital characteristics ^A
Epoch	March 6, 2006
Aphelion	14.19 AU
Perihelion	1.275 AU
Semi-major axis	7.734 AU
Eccentricity	0.8351
Orbital period	21.51 yr
Inclination	95.6899°
Last perihelion	June 20, 2005
Next perihelion	2026 Oct. 29^[1] 2026 Nov. 27^[2]^[3]^[4] 2026 December 18^[5]