111P/Helin–Roman–Crockett is a periodiccomet in the Solar System. It was discovered by Eleanor and Ron Helin on 5 January 1989 from images obtained on the 3rd and 4th of that month. It is a Jupiter family comet known for extremely close approaches to Jupiter being a Quasi-Hilda comet. During these approaches, it actually orbits Jupiter.[5] The last such approach was in 1976,[6] the next will be in 2071.[6] The Jovian orbits are highly elliptical and subject to intense Solar perturbation at apojove which eventually pulls the comet out of Jovian orbit for the cycle to begin anew.
Simulations predict such a cycle is unstable, the object will either be captured into an encounter orbit (e.g. Shoemaker-Levy 9) or expelled into a new orbit which does not have periodic approaches. This implies that 111P's orbit is recent within the past few thousand years. It fits the definition of an Encke-type comet with (TJupiter > 3; a < aJupiter).[7]
^Syuichi Nakano (2005-10-26). "111P/Helin-Roman-Crockett (NK 1271)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-24.
^Seiichi Yoshida (2011-07-22). "111P/Helin-Roman-Crockett". Seiichi Yoshida's Comet Catalog. Retrieved 2012-02-24.
^"Horizons Batch for 111P/Helin-Roman-Crockett on 2029-Dec-09" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2021-09-12. (JPL#8/Soln.date: 2013-Jan-28)
^Tancredi, G. (1990). "The capture of P/Helin-Roman-Crockett by Jupiter". Comptes-rendus de la table ronde: nouveaux développements en planétologie dynamique. pp. 273–279. Bibcode:1990ndpd.conf..273T.
^ ab"JPL Close-Approach Data: 111P/Helin-Roman-Crockett" (2001-09-20 last obs). Retrieved 2012-02-24.
111p, helin, roman, crockett, periodic, comet, solar, system, discovered, eleanor, helin, january, 1989, from, images, obtained, that, month, jupiter, family, comet, known, extremely, close, approaches, jupiter, being, quasi, hilda, comet, during, these, appro. 111P Helin Roman Crockett is a periodic comet in the Solar System It was discovered by Eleanor and Ron Helin on 5 January 1989 from images obtained on the 3rd and 4th of that month It is a Jupiter family comet known for extremely close approaches to Jupiter being a Quasi Hilda comet During these approaches it actually orbits Jupiter 5 The last such approach was in 1976 6 the next will be in 2071 6 The Jovian orbits are highly elliptical and subject to intense Solar perturbation at apojove which eventually pulls the comet out of Jovian orbit for the cycle to begin anew 111P Helin Roman CrockettDiscoveryDiscovered byEleanor F HelinRon HelinBrian P RomanRandy L CrockettPalomar Observatory 675 Discovery dateJanuary 5 1989DesignationsAlternative designations1988 XIIIOrbital characteristicsEpochMarch 6 2006Aphelion4 607 AUPerihelion3 474 AUSemi major axis4 041 AUEccentricity0 1402Orbital period8 122 aInclination4 2326 Last perihelionJune 15 2021 1 January 30 2013 2 December 27 2004 3 Next perihelion2029 Dec 09 4 Simulations predict such a cycle is unstable the object will either be captured into an encounter orbit e g Shoemaker Levy 9 or expelled into a new orbit which does not have periodic approaches This implies that 111P s orbit is recent within the past few thousand years It fits the definition of an Encke type comet with TJupiter gt 3 a lt aJupiter 7 References Edit 111P Helin Roman Crockett Orbit Minor Planet Center Retrieved 2014 06 17 Syuichi Nakano 2005 10 26 111P Helin Roman Crockett NK 1271 OAA Computing and Minor Planet Sections Retrieved 2012 02 24 Seiichi Yoshida 2011 07 22 111P Helin Roman Crockett Seiichi Yoshida s Comet Catalog Retrieved 2012 02 24 Horizons Batch for 111P Helin Roman Crockett on 2029 Dec 09 Perihelion occurs when rdot flips from negative to positive JPL Horizons Retrieved 2021 09 12 JPL 8 Soln date 2013 Jan 28 Tancredi G 1990 The capture of P Helin Roman Crockett by Jupiter Comptes rendus de la table ronde nouveaux developpements en planetologie dynamique pp 273 279 Bibcode 1990ndpd conf 273T a b JPL Close Approach Data 111P Helin Roman Crockett 2001 09 20 last obs Retrieved 2012 02 24 JPL Small Body Database Browser 111P Helin Roman Crockett 2001 09 20 last obs Jet Propulsion Laboratory Retrieved 2012 07 26 External links EditOrbital simulation from JPL Java Horizons Ephemeris 111P Helin Roman Crockett Seiichi Yoshida aerith net Elements and Ephemeris for 111P Helin Roman Crockett Minor Planet Center 111P at Kronk s Cometography Helin E Helin R Roman B Crockett R Seki T Kobayashi T Endate K Watanabe K Shao C Y Levy D 1989 Comet Helin Roman Crockett 1989b International Astronomical Union Circular 4714 1 Bibcode 1989IAUC 4714 1H Observations www oaa gr jp Numbered cometsPrevious110P Hartley 111P Helin Roman Crockett Next112P Urata Niijima Retrieved from https en wikipedia org w index php title 111P Helin Roman Crockett amp oldid 1050947224, wikipedia, wiki, book, books, library,
