OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE

Michele T. Bannister; Mike Alexandersen; Susan D. Benecchi; Ying Tung Chen; Audrey Delsanti; Wesley C. Fraser; Brett J. Gladman; Mikael Granvik; Will M. Grundy; Aurélie Guilbert-Lepoutre; Stephen D.J. Gwyn; Wing Huen Ip; Marian Jakubik; R. Lynne Jones; Nathan Kaib; J. J. Kavelaars; Pedro Lacerda; Samantha Lawler; Matthew J. Lehner; Hsing Wen Lin; Patryk Sofia Lykawka; Michael Marsset; Ruth Murray-Clay; Keith S. Noll; Alex Parker; Jean Marc Petit; Rosemary E. Pike; Philippe Rousselot; Megan E. Schwamb; Cory Shankman; Peter Veres; Pierre Vernazza; Kathryn Volk; Shiang Yu Wang; Robert Weryk

doi:10.3847/0004-6256/152/6/212

OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE

Michele T. Bannister, Mike Alexandersen, Susan D. Benecchi, Ying Tung Chen, Audrey Delsanti, Wesley C. Fraser, Brett J. Gladman, Mikael Granvik, Will M. Grundy, Aurélie Guilbert-Lepoutre, Stephen D.J. Gwyn, Wing Huen Ip, Marian Jakubik, R. Lynne Jones, Nathan Kaib, J. J. Kavelaars, Pedro Lacerda, Samantha Lawler, Matthew J. Lehner, Hsing Wen LinPatryk Sofia Lykawka, Michael Marsset, Ruth Murray-Clay, Keith S. Noll, Alex Parker, Jean Marc Petit, Rosemary E. Pike, Philippe Rousselot, Megan E. Schwamb, Cory Shankman, Peter Veres, Pierre Vernazza, Kathryn Volk, Shiang Yu Wang, Robert Weryk

Graduate Institute of Astronomy

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

We report the discovery and orbit of a new dwarf planet candidate, 2015 RR₂₄₅, by the Outer Solar System Origins Survey (OSSOS). The orbit of 2015 RR₂₄₅ is eccentric (e = 0.586), with a semimajor axis near 82 au, yielding a perihelion distance of 34 au. 2015 RR₂₄₅ has g - r = 0.59 ± 0.11 and absolute magnitude H_r = 3.6 ± 0.1; for an assumed albedo of p_V = 12%, the object has a diameter of ∼670 km. Based on astrometric measurements from OSSOS and Pan-STARRS1, we find that 2015 RR₂₄₅ is securely trapped on ten-megayear timescales in the 9:2 mean-motion resonance with Neptune. It is the first trans-Neptunian object (TNO) identified in this resonance. On hundred-megayear timescales, particles in 2015 RR₂₄₅-like orbits depart and sometimes return to the resonance, indicating that 2015 RR₂₄₅ likely forms part of the long-lived metastable population of distant TNOs that drift between resonance sticking and actively scattering via gravitational encounters with Neptune. The discovery of a 9:2 TNO stresses the role of resonances in the long-term evolution of objects in the scattering disk and reinforces the view that distant resonances are heavily populated in the current solar system. This object further motivates detailed modeling of the transient sticking population.

Original language	English
Article number	212
Journal	Astronomical Journal
Volume	152
Issue number	6
DOIs	https://doi.org/10.3847/0004-6256/152/6/212
State	Published - Dec 2016

Keywords

Kuiper belt objects: individual (2015 RR245)

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Bannister, M. T., Alexandersen, M., Benecchi, S. D., Chen, Y. T., Delsanti, A., Fraser, W. C., Gladman, B. J., Granvik, M., Grundy, W. M., Guilbert-Lepoutre, A., Gwyn, S. D. J., Ip, W. H., Jakubik, M., Jones, R. L., Kaib, N., Kavelaars, J. J., Lacerda, P., Lawler, S., Lehner, M. J., ... Weryk, R. (2016). OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE. Astronomical Journal, 152(6), [212]. https://doi.org/10.3847/0004-6256/152/6/212

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title = "OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE",

abstract = "We report the discovery and orbit of a new dwarf planet candidate, 2015 RR245, by the Outer Solar System Origins Survey (OSSOS). The orbit of 2015 RR245 is eccentric (e = 0.586), with a semimajor axis near 82 au, yielding a perihelion distance of 34 au. 2015 RR245 has g - r = 0.59 ± 0.11 and absolute magnitude Hr = 3.6 ± 0.1; for an assumed albedo of pV = 12%, the object has a diameter of ∼670 km. Based on astrometric measurements from OSSOS and Pan-STARRS1, we find that 2015 RR245 is securely trapped on ten-megayear timescales in the 9:2 mean-motion resonance with Neptune. It is the first trans-Neptunian object (TNO) identified in this resonance. On hundred-megayear timescales, particles in 2015 RR245-like orbits depart and sometimes return to the resonance, indicating that 2015 RR245 likely forms part of the long-lived metastable population of distant TNOs that drift between resonance sticking and actively scattering via gravitational encounters with Neptune. The discovery of a 9:2 TNO stresses the role of resonances in the long-term evolution of objects in the scattering disk and reinforces the view that distant resonances are heavily populated in the current solar system. This object further motivates detailed modeling of the transient sticking population.",

keywords = "Kuiper belt objects: individual (2015 RR245)",

author = "Bannister, {Michele T.} and Mike Alexandersen and Benecchi, {Susan D.} and Chen, {Ying Tung} and Audrey Delsanti and Fraser, {Wesley C.} and Gladman, {Brett J.} and Mikael Granvik and Grundy, {Will M.} and Aur{\'e}lie Guilbert-Lepoutre and Gwyn, {Stephen D.J.} and Ip, {Wing Huen} and Marian Jakubik and Jones, {R. Lynne} and Nathan Kaib and Kavelaars, {J. J.} and Pedro Lacerda and Samantha Lawler and Lehner, {Matthew J.} and Lin, {Hsing Wen} and Lykawka, {Patryk Sofia} and Michael Marsset and Ruth Murray-Clay and Noll, {Keith S.} and Alex Parker and Petit, {Jean Marc} and Pike, {Rosemary E.} and Philippe Rousselot and Schwamb, {Megan E.} and Cory Shankman and Peter Veres and Pierre Vernazza and Kathryn Volk and Wang, {Shiang Yu} and Robert Weryk",

year = "2016",

month = dec,

doi = "10.3847/0004-6256/152/6/212",

language = "???core.languages.en_GB???",

volume = "152",

journal = "Astronomical Journal",

issn = "0004-6256",

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Bannister, MT, Alexandersen, M, Benecchi, SD, Chen, YT, Delsanti, A, Fraser, WC, Gladman, BJ, Granvik, M, Grundy, WM, Guilbert-Lepoutre, A, Gwyn, SDJ, Ip, WH, Jakubik, M, Jones, RL, Kaib, N, Kavelaars, JJ, Lacerda, P, Lawler, S, Lehner, MJ, Lin, HW, Lykawka, PS, Marsset, M, Murray-Clay, R, Noll, KS, Parker, A, Petit, JM, Pike, RE, Rousselot, P, Schwamb, ME, Shankman, C, Veres, P, Vernazza, P, Volk, K, Wang, SY & Weryk, R 2016, 'OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE', Astronomical Journal, vol. 152, no. 6, 212. https://doi.org/10.3847/0004-6256/152/6/212

TY - JOUR

T1 - OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE

AU - Bannister, Michele T.

AU - Alexandersen, Mike

AU - Benecchi, Susan D.

AU - Chen, Ying Tung

AU - Delsanti, Audrey

AU - Fraser, Wesley C.

AU - Gladman, Brett J.

AU - Granvik, Mikael

AU - Grundy, Will M.

AU - Guilbert-Lepoutre, Aurélie

AU - Gwyn, Stephen D.J.

AU - Ip, Wing Huen

AU - Jakubik, Marian

AU - Jones, R. Lynne

AU - Kaib, Nathan

AU - Kavelaars, J. J.

AU - Lacerda, Pedro

AU - Lawler, Samantha

AU - Lehner, Matthew J.

AU - Lin, Hsing Wen

AU - Lykawka, Patryk Sofia

AU - Marsset, Michael

AU - Murray-Clay, Ruth

AU - Noll, Keith S.

AU - Parker, Alex

AU - Petit, Jean Marc

AU - Pike, Rosemary E.

AU - Rousselot, Philippe

AU - Schwamb, Megan E.

AU - Shankman, Cory

AU - Veres, Peter

AU - Vernazza, Pierre

AU - Volk, Kathryn

AU - Wang, Shiang Yu

AU - Weryk, Robert

PY - 2016/12

Y1 - 2016/12

N2 - We report the discovery and orbit of a new dwarf planet candidate, 2015 RR245, by the Outer Solar System Origins Survey (OSSOS). The orbit of 2015 RR245 is eccentric (e = 0.586), with a semimajor axis near 82 au, yielding a perihelion distance of 34 au. 2015 RR245 has g - r = 0.59 ± 0.11 and absolute magnitude Hr = 3.6 ± 0.1; for an assumed albedo of pV = 12%, the object has a diameter of ∼670 km. Based on astrometric measurements from OSSOS and Pan-STARRS1, we find that 2015 RR245 is securely trapped on ten-megayear timescales in the 9:2 mean-motion resonance with Neptune. It is the first trans-Neptunian object (TNO) identified in this resonance. On hundred-megayear timescales, particles in 2015 RR245-like orbits depart and sometimes return to the resonance, indicating that 2015 RR245 likely forms part of the long-lived metastable population of distant TNOs that drift between resonance sticking and actively scattering via gravitational encounters with Neptune. The discovery of a 9:2 TNO stresses the role of resonances in the long-term evolution of objects in the scattering disk and reinforces the view that distant resonances are heavily populated in the current solar system. This object further motivates detailed modeling of the transient sticking population.

AB - We report the discovery and orbit of a new dwarf planet candidate, 2015 RR245, by the Outer Solar System Origins Survey (OSSOS). The orbit of 2015 RR245 is eccentric (e = 0.586), with a semimajor axis near 82 au, yielding a perihelion distance of 34 au. 2015 RR245 has g - r = 0.59 ± 0.11 and absolute magnitude Hr = 3.6 ± 0.1; for an assumed albedo of pV = 12%, the object has a diameter of ∼670 km. Based on astrometric measurements from OSSOS and Pan-STARRS1, we find that 2015 RR245 is securely trapped on ten-megayear timescales in the 9:2 mean-motion resonance with Neptune. It is the first trans-Neptunian object (TNO) identified in this resonance. On hundred-megayear timescales, particles in 2015 RR245-like orbits depart and sometimes return to the resonance, indicating that 2015 RR245 likely forms part of the long-lived metastable population of distant TNOs that drift between resonance sticking and actively scattering via gravitational encounters with Neptune. The discovery of a 9:2 TNO stresses the role of resonances in the long-term evolution of objects in the scattering disk and reinforces the view that distant resonances are heavily populated in the current solar system. This object further motivates detailed modeling of the transient sticking population.

KW - Kuiper belt objects: individual (2015 RR245)

UR - http://www.scopus.com/inward/record.url?scp=85009067351&partnerID=8YFLogxK

U2 - 10.3847/0004-6256/152/6/212

DO - 10.3847/0004-6256/152/6/212

M3 - 期刊論文

AN - SCOPUS:85009067351

SN - 0004-6256

VL - 152

JO - Astronomical Journal

JF - Astronomical Journal

IS - 6

M1 - 212

ER -

OSSOS. IV. DISCOVERY of A DWARF PLANET CANDIDATE in the 9:2 RESONANCE with NEPTUNE

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Keywords

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