161P/Hartley–IRAS
{{Short description|Periodic comet with 21 year orbit}}
{{For|the other comets discovered by Malcolm Hartley and the Infrared Astronomical Satellite|Comet Hartley (disambiguation){{!}}Comet Hartley|Comet IRAS}}
{{Infobox comet
| name=161P/Hartley–IRAS
| image=
| discoverer=Malcolm Hartley
IRAS
| discovery_date=November 4, 1983
| designations=1984 III; 2004 V2
| epoch=March 6, 2006
| semimajor=7.734 AU
| perihelion=1.275 AU
| aphelion=14.19 AU
| eccentricity=0.8351
| period=21.51 yr
| inclination= 95.6899°
| last_p=June 20, 2005
| next_p=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).
This was one of six comets discovered by the infrared space telescope IRAS, in 1983.{{Cite journal|url=http://adsabs.harvard.edu/full/1986QJRAS..27..102M|title=1986QJRAS..27..102M Page 102|journal=Quarterly Journal of the Royal Astronomical Society|bibcode=1986QJRAS..27..102M |access-date=2019-09-30 |last1=Marsden |first1=B. G. |date=1986 |volume=27 |page=102 }}
References
{{reflist|refs=
|date=2005-06-21
|title=161P/Hartley-IRAS (NK 1184)
|publisher=OAA Computing and Minor Planet Sections
|author=Syuichi Nakano
|author-link=Syuichi Nakano
|url=http://www.oaa.gr.jp/~oaacs/nk/nk1184.htm
|accessdate=2012-02-18}}
|date=2006-07-16
|title=161P/Hartley-IRAS
|publisher=Seiichi Yoshida's Comet Catalog
|author=Seiichi Yoshida
|url=http://www.aerith.net/comet/catalog/0161P/index.html
|accessdate=2012-02-19}}
|title=Horizons Batch for 161P/Hartley-IRAS on 2026-Nov-27
|publisher=JPL Horizons
|type=Perihelion occurs when rdot flips from negative to positive
|url=https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27161P%27&START_TIME=%272026-Nov-24%27&STOP_TIME=%272026-Nov-30%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27
|accessdate=2022-06-22}} (JPL#60 Soln.date: 2021-Apr-15)
|title=161P/Hartley-IRAS Orbit
|url=http://www.minorplanetcenter.net/db_search/show_object?object_id=161P
|publisher=Minor Planet Center
|accessdate=2014-06-18}}
|date=2005-10-12
|title=Note number : 0132 P/Hartley-IRAS : 161P
|publisher=Institut de mécanique céleste et de calcul des éphémérides
|author=Patrick Rocher
|url=http://www.imcce.fr/en/ephemerides/donnees/comets/FICH/CIF0132.php
|accessdate=2012-02-19}}
|type=2005-10-12 last obs
|title=JPL Small-Body Database Browser: 161P/Hartley-IRAS
|url=http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=161P
|publisher=Jet Propulsion Laboratory
|accessdate=2012-07-26}}
{{cite book |title=Dictionary of Minor Planet Names |url=https://archive.org/details/dictionaryminorp00schm |url-access=limited |publisher=Springer Berlin Heidelberg |last=Schmadel |first=Lutz D. |chapter=(3728) Iras |page=[https://archive.org/details/dictionaryminorp00schm/page/n328 315] |date=2007 |doi=10.1007/978-3-540-29925-7_3725 |isbn=978-3-540-00238-3}}
}}
External links
- [http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=161P;orb=1 Orbital simulation] from JPL (Java) / [http://ssd.jpl.nasa.gov/horizons.cgi?find_body=1&body_group=sb&sstr=161P Horizons Ephemeris]
- [http://www.aerith.net/comet/catalog/0161P/index.html 161P/Hartley-IRAS] – Seiichi Yoshida @ aerith.net
- [http://cometography.com/pcomets/161p.html 161P at Kronk's Cometography]
{{PeriodicComets Navigator|160P/LINEAR|162P/Siding Spring}}
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{{DEFAULTSORT:Hartley-IRAS, 161P}}
Category:Discoveries by Malcolm Hartley
Category:IRAS catalogue objects
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