Pluto System After New Horizons

July 14-18, 2019

Laurel, Maryland

Program and Abstracts

Sunday, July 14, 2019

5:00 p.m.

Kossiakoff Center

Registration and Opening Reception

Monday, July 15, 2019

8:30 a.m.	Auditorium	Discovery of Pluto and the Kuiper Belt: The Imperative for Exploration
10:15 a.m.	Auditorium	Pluto Geology and Surface Features
1:30 p.m.	Auditorium	Pluto Geology, Colors, and Composition
6:00 p.m.		End of Day

Tuesday, July 16, 2019

8:30 a.m.	Auditorium	Charon
1:00 p.m.	Auditorium	Small Satellites and Orbital Dynamics of the Pluto System
3:00 p.m.	Auditorium	Pluto’s Got Atmosphere — Kickoff
4:00 p.m.	North Dining Room	Poster Session: Discovery of Pluto and the Kuiper Belt: The Imperative for Exploration
4:00 p.m.	North Dining Room	Poster Session: Pluto’s Got Atmosphere
4:00 p.m.	North Dining Room	Poster Session: Geology and Surface Features
4:00 p.m.	North Dining Room	Poster Session: Pluto’s Climate and Redistribution of Volatiles
4:00 p.m.	North Dining Room	Poster Session: Beyond Pluto: 2014 MU69 and the Kuiper Belt Environment
4:00 p.m.	North Dining Room	Poster Session: Pluto Geology, Colors, and Composition
4:00 p.m.	North Dining Room	Poster Session: Charon
4:00 p.m.	North Dining Room	Poster Session: Origin and Dynamics of the Pluto System
6:00 p.m.		End of Poster Session

Wednesday, July 17, 2019

8:30 a.m.	Auditorium	Pluto’s Got Atmosphere I
1:30 p.m.	Auditorium	Pluto’s Got Atmosphere II
3:00 p.m.	Auditorium	Pluto’s Climate and Redistribution of Volatiles
5:45 p.m.		End of Day

Thursday, July 18, 2019

8:30 a.m.	Auditorium	Beyond Pluto: 2014 MU69 and the Kuiper Belt Environment
10:30 a.m.	Auditorium	Future Investigations of the Pluto System and Kuiper Belt
1:00 p.m.	Auditorium	Origin and Dynamics of the Pluto System
3:45 p.m.	Auditorium	Closing Announcements
4:00 p.m.		End of Conference

Monday, July 15, 2019

DISCOVERY OF PLUTO AND THE KUIPER BELT: THE IMPERATIVE FOR EXPLORATION

8:30 a.m. Auditorium

Chairs: Harold Weaver and Leslie Young

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
8:30 a.m.		Welcome and Opening Remarks
8:45 a.m.	[INVITED] Schindler K. S. *	Pluto, the Moon, and the Case for Multi-stage Space Exploration [#7059] This program explores the value of multi-stage space exploration, comparing the classic case of Moon research--from naked eye observing to manned missions--to the discovery of Pluto, ensuing research of that planet, and potential future efforts.
9:15 a.m.	Binzel R. Cruikshank D.	GUIDED DISCUSSION: Historical Recollections and the Ongoing Imperative for Exploring the Third Zone of Our Solar System
9:45 a.m.		Break

Monday, July 15, 2019

PLUTO GEOLOGY AND SURFACE FEATURES

10:15 a.m. Auditorium

Chairs: Bryan Butler and Anne Verbiscer

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
10:15 a.m.	[INVITED] Singer K. N. * White O. L. Moore J. M. Howard A. D. Schenk P. M. Williams D. A. Lopes R. M. C. Stern S. A. Ennico K. Olkin C. B. Weaver H. A. Young L. A. New Horizons Geology and Geophysics Team	The Geology of Pluto [#7005] New Horizons revealed surprising geologic diversity across Pluto. We give an overview of the varied processes sculpting Pluto’s landscapes, including sublimation and redeposition of ices, tectonics, glaciers, cratering, and possible cryovolcanism.
10:45 a.m.	[INVITED] Buratti B. J. * Hofgartner J. Hilier J. H. Hicks M. D. Verbiscer A. J. Stern S. A. Weaver H. A. Howett C. J. A. Young L. A. Cheng A. Ennico K. Olkin C. B.	Photometry and Albedo Maps of Pluto and Charon [#7023] Photometric properties of Charon are similar to those of the icy moons of the outer planets, but Pluto’s huge differences in albedo — second only to Iapetus — show it is a unique, geologically active planet.
11:15 a.m.	[INVITED] Schenk P. * Singer K. Greenstreet S. Robbins S. Bray V. McKinnon W. White O. Spencer J. Weaver H. Lauer T. Moore J. Stern S. A. Beyer R. Young L. Olkin C.	Impact Craters on Pluto: Size-Frequency Distributions, Morphologies, Terrain Ages [#7043] Big rocks fall from sky, go boom. After that the fun begins. Crater scars left behind tell tales of Pluto and the Kuiper Belt.
11:45 a.m.	McGovern P. J. * White O. L. Schenk P. M.	Tectonism Across Pluto: Mapping and Interpretations [#7063] We present structural mapping of Pluto’s encounter hemisphere and assign mapped tectonic features into orientational classes. We consider the implications of our results in terms of what factors control tectonism across Pluto.
12:00 p.m.	Radebaugh J. * Telfer M. W. Parteli E. J. R. Beyer R. A. Kirk R. L.	The Shapes and Distributions of Dunes on Pluto [#7069] The dunes of Pluto have forms that vary in size and shape across Sputnik Planitia. They display shapes, spacings, and heights consistent with shapes of dunes seen on other planets, especially elementary forms and snow dunes on Earth.
12:15 p.m.		Lunch Break

Monday, July 15, 2019

PLUTO GEOLOGY, COLORS, AND COMPOSITION

1:30 p.m. Auditorium

Chairs: Jani Radebaugh and Patrick McGovern

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
1:30 p.m.	[INVITED] Olkin C. B. * Howett C. J. A. Protopapa S. Grundy W. M. Buie M. W. Verbiscer A. Stern S. A. Weaver H. A. Young L. A. Ennico K.	The Colors and Photometric Properties of Pluto [#7045] This paper will focus on our new understanding of the color of Pluto’s surface from the New Horizons mission results. Different terrain units will be discussed. Also an overview of the photometric properties of Pluto’s surface will be presented.
2:00 p.m.	[INVITED] Grundy W. M. * Cruikshank D. P. Protopapa S. Schmitt B.	Pluto’s Surface Composition [#7051] Pluto’s surface composition is regionally heterogeneous. Volatile ices of N2, CO, and CH4 are mobile on seasonal timescales, interacting with and even sculpting more inert materials such as H2O, NH3, CH3OH, and complex organics.
2:30 p.m.	Stern S. A. * Weaver H. A. Young L. A. Olkin C. B. Moore J. M. Grundy W. M. McKinnon W. B. Lauer T. R. Cruikshank D. P. Spencer J. R. Gladstone G. R. Ennico K. New Horizons Science Team	Pluto’s Far Side [#7024] This session will review all we know about the “far side” of Pluto based on the datasets obtained by New Horizons. We will also review future opportunities to advance the study of the far side over the next few decades.
2:45 p.m.	Cruikshank D. P. * Umurhan O. M. Beyer R. A. Schmitt B. Keane J. T. Runyon K. D. Atri D. White O. L. Matsuyama I. Moore J. M. Sandford S. A. Singer K. N. Grundy W. M. Dalle Ore C. M. Cook J. C. Bertrand T. Stern S. A. Olkin C. B. Weaver H. A. Young L. A. Spencer J. R. Lisse C. M. Pendleton Y. J. Binzel R. P. Earle A. M. Robbins S. J. Gladstone G. R. Schenk P. M. Cartwright R. J. McKinnon W. B. Ennico K. Scipioni F.	Cryovolcanism on Pluto [#7020] Geological and compositional evidence indicate relatively recent (less than 10^9 y) cryovolcanic activity in Virgil Fossae and in Viking Terra.
3:00 p.m.	Umurhan O. M. * Cruikshank D. P.	Cryovolcanism on Pluto: Various Theoretical Considerations [#7066] Cryovolcanism has been suggested as the culprit responsible for several observed surface features on both Pluto and Charon. We theoretically examine how this might look under conditions appropriate to these bodies.
3:15 p.m.		Break
3:45 p.m.	[INVITED] Ahrens C. J. * Umurhan O. M. Chevrier V.	Overview of Thermal and Rheological Properties of Ices on Pluto and Other Bodies of the Outer Solar System [#7033] Surfaces processes on Pluto and other icy bodies of the outer solar system require detailed knowledge of ice thermophysical and rheological properties. We present a comprehensive compilation of these quantities based on the published literature.
4:15 p.m.	Butler B. J. * Grundy W. M. Gurwell M. A. Lellouch E. Moreno R. Moullet A. Young L. A.	Observations of Pluto’s Surface with ALMA [#7058] We will describe long-wavelength (~1mm) observations of Pluto with ALMA. Observations were carried out at three longitudes, with enough resolution to easily resolve Pluto. At least one brightness temperature enhancement is seen, near Piri Planitia.
4:30 p.m.	Protopapa S. * Olkin C. Grundy W. Li J. Y. Verbiscer A. Cruikshank D. P. Howett C. J. A. Stern A. Weaver H. A. Young L. A.	Photometric Properties of Pluto’s Main Surface Units [#7054] We present a multi-wavelength, regionally dependent photometric analysis of Pluto’s surface. We will use these properties to quantitively infer the composition of Pluto’s different terrains.
4:45 p.m.	Schmitt B. * Gabasova L. Bertrand T. Grundy W. Stansberry J. Lewis B. Protopapa S. Young L. Olkin C. Reuter D. Stern A. Weaver H.	Methane Stratification on Pluto Inferred from New Horizons LEISA Data [#7004] We show that the relative intensity of the CH4 band depth reflect a stratification of CH4. The stratification of CH4 is shown to result from the differential sublimation between N2 and CH4 which tends to concentrate CH4 in N2 ice grains.
5:00 p.m.	Fayolle M. Quirico E. Schmitt B. * Jovanovic L. Gautier T. Carrasco N. Grundy W. Vuitton V. Poch O. Gabasova L. Protopapa S. Young L.	Testing Tholins as Analogs of the Dark Reddish Material Covering the Cthulhu Region [#7075] Optical properties of dust tholins have been determined in the laboratory and used to feed Hapke models. Fitting MVIC/LEISA data of the Cthulhu region reveals that the dark reddish material is likely highly porous, or may have been processed by GCR.
5:15 p.m.	Dalle Ore C. M. * Cruikshank D. P. Protopapa S. Grundy W. M. Olkin C. B. Stern S. A. Weaver H. A. Young L. A. and The New Horizons Composition Team	Pluto Dark Refractory Material: A Close Look at Composition and Origin [#7073] We investigate the dark refractory constituent that distinguishes Cthulhu and compare and contrast its signature as the H2O component varies. Our goal is to trace the origin of the material and constrain its mechanisms of formation.
5:30 p.m.	Keane J. T. Moore J.	GUIDED DISCUSSION: New Insights on Pluto’s Geology, Colors, Composition and Their Correlations.
6:00 p.m.		END OF DAY 1

Tuesday, July 16, 2019

CHARON

8:30 a.m. Auditorium

Chairs: Lynnae Quick and Benjamin Teolis

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
8:30 a.m.	[INVITED] Beyer R. A. * Spencer J. Robbins S. Singer K. Beddingfield C. Grundy W. Ennico K. Keane J. McKinnon W. Moore J. Nimmo F. Olkin C. Runyon K. Schenk P. Stern A. Weaver H. Young L. New Horizons Science Team	Geology of Charon [#7035] Charon is a geologically complex world, different in character from Pluto. Charon shows signs of tectonic disruption and large scale resurfacing, consistent with an ancient global ocean, now frozen.
9:00 a.m.	Quick L. C. *	A New Analysis of the Rheology of Cryolava Flows in Vulcan Planitia [#7081] Here we present a new analysis of the emplacement of the Vulcan Planitia flows, considering a time dependent viscosity due to cooling of the cryolava with time.
9:15 a.m.	[INVITED] Howett C. J. A. * Olkin C. B. Protopapa S. Grundy W. M. Verbiscer A. Buratti B. J.	Charon’s Colors and Photometric Properties [#7015] This paper is an overview of Charon’s global and regional colors, and its photometric properties.
9:45 a.m.	[INVITED] Cook J. C. * Protopapa S. Cruikshank D. P. Dalle Ore C. M. Grundy W. M.	Charon’s Surface Composition [#7049] This is an invited talk to give a review of what is known about the surface composition of Charon.
10:15 a.m.	Teolis B. D. * Raut U. Kammer J. A. Howett C. J. A. Retherford K. D. Gladstone G. R.	Origin of Charon’s Red Poles: New Insights from Exospheric Modeling and Solid Methane Photolysis [#7079] We present combined exospheric modeling and laboratory measurements to quantify the contribution of solid methane photolysis to the surface composition and color of Charon’s red polar cap.
10:30 a.m.	Robbins S. Protopapa S.	GUIDED DISCUSSION: New Insights into Charon as a Large Satellite and Member of the Kuiper Belt
11:00 a.m.		Lunch Break

Tuesday, July 16, 2019

SMALL SATELLITES AND ORBITAL DYNAMICS OF THE PLUTO SYSTEM

1:00 p.m. Auditorium

Chairs: Kathy Mandt and Ted Stryk

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
1:00 p.m.	[INVITED] Weaver H. A. * Porter S. B. Buie M. W. Cook J. C. Grundy W. M. Verbiscer A. J. Hamilton D. P. Lauer T. R. Showalter M. R. Spencer J. R. Stern S. A. Ennico K. Olkin C. B. Young L. A. New Horizons Science Team	Pluto’s Small Satellites [#7028] In this invited talk, we review the properties of the small satellites and how they inform our understanding of the origin of the Pluto system.
1:30 p.m.	Lauer T. R. * Throop H. B. Showalter M. R. Weaver H. A. Stern S. A. Spencer J. R. Buie M. W. Hamilton D. P. Porter S. B. Verbiscer A. J. Young L. A. Olkin C. B. Ennico K.	The New Horizons and Hubble Space Telescope Search for Rings, Dust, and Debris in the Pluto/Charon System [#7041] We searched for rings and dust/debris features during the New Horizons exploration of the Pluto/Charon system. No features were discovered at I/F limits comparable to those at which faint rings had been detected around other solar system objects.
1:45 p.m.	Porter S. B. * Showalter M. R. Weaver H. A. Spencer J. R. Lauer T. R. Verbiscer A. J. Grundy W. M. Stern S. A. Young L. A. Olkin C. B. Ennico K.	The Shapes and Poles of Nix and Hydra from New Horizons [#7038] Four small satellites Regular in orbit but not shape Spinning fast.
2:00 p.m.	Showalter M. R. * Porter S. B. Verbiscer A. J. Buie M. W. Helfenstein P.	Rotation States of Pluto’s Small Moons and the Search for Spin-Orbit Resonances [#7052] Lightcurves from Hubble data 2010–2019 provide the precise rotation rates and polar precession rates of the Pluto’s small moons. We will compare these results with new models for spin-orbit resonances that allow for the moons’ polar precession.
2:15 p.m.	Hamilton D. P. * De Santana T.	Three-Body and Spin-Orbit Resonances in the Pluto System [#7072] We investigate the history of Pluto’s small satellites numerically, paying particular attention to likely important three-body and spin-orbit resonances.
2:30 p.m.	Showalter M. Canup R.	GUIDED DISCUSSION: New Iinsights into the Pluto Satellites and the Orbital Dynamics of the Pluto System.

Tuesday, July 16, 2019

PLUTO’S GOT ATMOSPHERE — KICKOFF

3:00 p.m. Auditorium

Chairs: Kathy Mandt and Ted Stryk

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
3:00 p.m.	[INVITED] Summers M. E. * Young L. A. Gladstone G. R. Strobel D. F. Person M. J.	The Composition of Pluto’s Atmosphere [#7077] The Observations obtained by the New Horizons flyby of Pluto have provided a watershed for our understanding of the composition of Pluto’s atmosphere from its surface to near ~1500 km altitude.
3:30 p.m.		Break

Tuesday, July 16, 2019

POSTER SESSION: DISCOVERY OF PLUTO AND THE KUIPER BELT: THE IMPERATIVE FOR EXPLORATION

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Spilker B. C. Christiansen E. H. Radebaugh J.	Revisions to the Online Textbook Exploring the Planets (explanet.info):  Pluto [#7062] Since New Horizons’ flyby, we have learned a lot about the planetary body Pluto. Our project is updating the Pluto chapter of the online textbook Exploring the Planets so college students can be up to date on discoveries associated with Pluto.

Tuesday, July 16, 2019

POSTER SESSION: PLUTO’S GOT ATMOSPHERE

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Jacobs A. Summers M. Gladstone G. R. Cheng A. Strobtl D. Lisse C. Young L. Pesnell D. Gao P. Kammer J. Weaver H. Bertrand T.	Observations and Theory for Waves in Pluto’s Atmosphere [#7065] Pluto’s atmosphere has an extensive background haze with as many as 20 relatively bright embedded layers within this background haze. We use microphysical models and atmospheric scattering simulations, to analyze the existing observations.
Sickafoose A. A. Bosh A. S. Levine S. E. Person M. J. Schindler K. Zuluaga C. A.	Stellar Occultations by Pluto:  2017–2018 [#7026] Pluto’s evolving atmosphere has been studied by stellar occultations since the 1980s. New Horizons provided in situ measurements in 2015. We present results from five occultations by Pluto in 2017/ 2018, which continue the atmospheric monitoring.
Bird M. K. Linscott I. R. Hinson D. P. Tyler G. L. Strobel D. F. Pätzold M. Summers M. E. Hahn M. Andert T. P. Stern S. A. Weaver H. A. Young L. A. Ennico K. Gladstone G. R. Olkin C. B. Moore J. M. Grundy W. M. DeBoy C. C. Vincent M.	Radio Science Experiment (REX) on New Horizons: Results from the Pluto Flyby [#7018] Summaries of the REX investigations during the Pluto flyby, including an atmospheric radio occultation, radio thermal emission measurements, a bistatic radar experiment, and a system mass determination, are presented.
Mardon A. A. Zhou G.	Understanding of Pluto Atmospheric Dynamics and Behaviour from New Horizons Mission [#7074] The New Horizons flyby of Pluto and its satellite system in 2015 changed our original understanding of this distant planet and its moons. Amongst this is the renewed information about the structure and composition of Pluto’s atmosphere.
Tucker O. J. Johnson R. E. Bell J. Collier M. R. Farrell W. M. Glocer A. Killen R. M. Saxena P.	Limits on X-Ray Luminosity from Pluto’s H2 Corona [#7080] We examine the effect of diffusion and escape of H2 on the thermal structure of Pluto’s upper atmosphere, and potential limits on its contribution as a source X-ray emission from Pluto’s corona.

Tuesday, July 16, 2019

POSTER SESSION: GEOLOGY AND SURFACE FEATURES

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Ahrens C. J. Byrne P. K. Chevrier V. F.	Characterizing Faults Across the Surface of Pluto [#7036] Distributions and variations of fault systems observed across Pluto’s icy surface suggest that localized conditions may be important to the structural evolution. This preliminary work begins with the mapping and calculating shear stress.
Beyer R. A. Schenk P. Moore J. Beddingfield C. White O. McKinnon W. Spencer J. Stern S. Young L. Olkin C. Ennico K. Weaver H. New Horizons Science Team	High-Resolution Pixel-Scale Topography of Pluto and Charon [#7042] The highest resolution images, as well as haze-light images of Pluto and Charon, can be processed with stereogrammetry and photoclinometry to extract the highest possible degree of topographic information.
Lenhart E. M. Berrondo M. Radebaugh J. Telfer M. W. Parteli E.	Application of a Physical Model to Dune Pattern Emergence on Pluto [#7064] Recent images of dunes on Pluto open questions about the movement of loose, sand-sized particles, and the conditions under which this movement can form familiar patterns. We seek to better understand these patterns using physical models.
Mills A. C. Montesi L. G. J.	Elastic Flexure Around Sputnik Planitia, Pluto, and Evidence for a Very High Heat Flux [#7030] We test if the current topography of Sputnik Planitia and its surroundings contain evidence for a flexural bulge that formed by a large load of nitrogen ice. We find evidence for a very high heat flux when the flexure took place.
Robbins S. J. Schenk P. M. Singer K. N.	The Depth-Diameter Relationship of Well-Preserved Impact Craters on Pluto and Charon [#7055] Impact crater depths / Can be measured in many / Ways: We report here.
Skjetne H. L. Singer K. N. Hynek B. M. Knight K. I. Schenk P. M. Olkin C. B. White O. L. McKinnon W. B. Bertrand T. Moore J. M. Stern S. A. Runyon K. D. Weaver H. A. Young L. A.	Chaos Terrains on Pluto, Europa, and Mars — Morphological Comparison of Blocks [#7011] We provide a morphological comparison of the blocks that make up chaos terrain on Pluto, Jupiter’s moon Europa, and Mars by measuring block diameters, heights, and axial ratios. We discuss the implications of our results for crustal lithology.

Tuesday, July 16, 2019

POSTER SESSION: PLUTO’S CLIMATE AND REDISTRIBUTION OF VOLATILES

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Holler B. J. Yanez M. D. Young L. A. Verbiscer A. J. Chanover N. J. Olkin C. B.	Evaluation of Short-Term Temporal Evolution of Pluto’s Surface from 2014–2017 [#7068] Analysis of “matched pairs” of near-infrared spectra of Pluto between 2014 and 2017 indicate a possible increase in CH4 concentration on the sub-Charon hemisphere, in agreement with global modeling performed following the New Horizons flyby.
Shi H. S. Lai I. L. Ip W. H.	The Long-Term Evolution of Pluto’s Atmosphere and Its Effect on Charon’s Surface Tholin Formation [#7014] We use a coupled treatment based on the energy balance equation to compute the long-term evolution of Pluto’s surface temperature and pressure and applied the DSMC method to explore the corresponding escape dynamics of Charon’s tholin-like materials.

Tuesday, July 16, 2019

POSTER SESSION: BEYOND PLUTO: 2014 MU69 AND THE KUIPER BELT ENVIRONMENT

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Stryk T. Moore J. M. Spencer J. R. Olkin C. B. Weaver H. A. Stern S. A.	2014 MU69 in Context [#7019] The New Horizons flyby of 2014 MU69 “Ultima Thule” provided a close-up view of a pristine cold-classical binary Kuiper belt object [1]. The goal of this poster is to put it in context relative to similarly-sized objects throughout the solar system.

Tuesday, July 16, 2019

POSTER SESSION: PLUTO GEOLOGY, COLORS, AND COMPOSITION

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Ahrens C. J. Chevrier V. F.	Spectral Behavior of Methane in Binary and Ternary Icy Mixtures in Experimental Pluto Conditions [#7034] Methane when mixed in binary ice mixtures with nitrogen or carbon monoxide show variability in spectral band strengths and shifting. When in ternary mixtures, certain methane bands depend on the ratio of the constituents.
Gabasova L. R. Schmitt B. Grundy W. Olkin C. B. Spencer J. R. Young L. A. Ennico K. Weaver H. A. Stern S. A. New Horizons Composition Team	Global Compositional Cartography of Pluto from LEISA Data [#7029] We use intensity-based registration methods to co-register high-resolution LEISA data with lower-resolution imagery taken during the approach to Pluto, and produce the first global compositional maps of Pluto’s surface.
Verbiscer A. J. Showalter M. R. Buie M. W. Helfenstein P.	The Pluto System at True Opposition [#7050] Photometric properties of Pluto and its five moons from HST observations at the smallest possible solar phase angles.

Tuesday, July 16, 2019

POSTER SESSION: CHARON

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Chen H. Z. Yin A.	Tectonic History of the Oz Terra of Charon as Revealed by Systematic Structural Mapping [#7007] We established a new tectonic evolution history of Oz Terra by conducting a systematic photo-geological mapping across the region, during which fault association and kinematic compatibility was considered. An early compressional event was discerned.

Tuesday, July 16, 2019

POSTER SESSION: ORIGIN AND DYNAMICS OF THE PLUTO SYSTEM

4:00 p.m. North Dining Room

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Authors (*Denotes Presenter)	Abstract Title and Summary
Jacobson R. A. Brozovic M. Showalter M. Verbiscer A. Buie M. Helfenstein P.	The Orbits and Masses of Pluto’s Satellites [#7031] This paper reports on our latest integrated orbits of the satellites and the masses of all bodies in the Pluto system.
Perov N. I.	Resonances in Pluto’s System [#7001] In the frame of the restricted circle plane seven body problem “Pluto-Charon-Styx-Nix-Kerberos-Hydra” (any) “resonances” particles with the satellites motion is considered. Common conditions for the existence of the horseshoes trajectories are found.
Coppieters B.	Can Abkhazia be a State if Pluto is not a Planet? Recognition and Non-Recognition of Status in Astronomy, International Law and Political Science [#7078] The research compares definitions of entities emphasizing inherent properties and definitions highlighting interactions between entities and the external world, covering planets in astronomy and states in international law and politics.

Wednesday, July 17, 2019

PLUTO’S GOT ATMOSPHERE I

8:30 a.m. Auditorium

Chairs: Amanda Sickafoose and Alissa Earle

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
8:30 a.m.	[INVITED] Jessup K. L. * Cheng A. Gao P. Luspay-Kuti A. Mandt K.	Photochemistry and Haze Formation [#7032] Photochemical and haze production models will be reviewed, highlighting the key processes supporting Pluto’s atmospheric structure and thermal balance, and outstanding questions about these topics. Similarities between Titan and Pluto will also be discussed.
9:00 a.m.	[INVITED] Bertrand T. * Forget F. Toigo A. Hinson D.	Pluto’s Atmosphere Dynamics: How the Nitrogen Heart Regulates the Circulation [#7017] Pluto’s climate is remarkably active. The N2 icecap within Sputnik Planitia seems to be the heart of the climate system, since it controls the evolution of surface pressure, regulates the general circulation, and triggers atmospheric waves and tides.
9:30 a.m.	Gladstone G. R. * Kammer J. A. Yung Y. L. Pryor W. R. Stern S. A.	Constraining Pluto’s H and CH4 Profiles with Alice Lyman-Alpha Observations [#7071] Alice Lyman alpha airglow observations are compared with detailed simulations to extract constraints on H and CH4 densities in Pluto’s atmosphere.
9:45 a.m.	Gurwell M. A. * Lellouch E. Butler B. J. Moreno R. Moullet A. Strobel D. F. Lavvas P.	The Atmospheres of Pluto and Triton: Investigations with ALMA [#7060] The thin, nitrogen-dominated atmospheres of Pluto and Triton have been explored through a series of observations using ALMA. We will highlight our results and look toward future investigations in this presentation.
10:00 a.m.		Break
10:30 a.m.	Jovanovic L. * Gautier T. Carrasco N. Vuitton V. Quirico E. Wolters C. Orthous-Daunay F.-R. Vettier L. Flandinet L.	Laboratory Simulation of Pluto’s Atmosphere and Aerosols [#7021] We will present laboratory investigation of Pluto’s atmosphere and its aerosols formation to help understand the data provided by the New Horizons spacecraft.
10:45 a.m.	Krasnopolsky V. A. *	Photochemical Model of Pluto’s Atmosphere and Ionosphere [#7002] The detailed model of Titan’s photochemistry is adjusted to Pluto’s conditions during the NH flyby. The model fits all observational constraints, includes ion chemistry, and does not require revision of saturated vapor densities of C2H4 and C2H6.
11:00 a.m.	Johnson P. E. * Young L. A. Protopapa S. Schmitt B. Lewis B. L. Stansberry J. A. Mandt K. E. White O. L.	Pluto’s Minimum Surface Pressure and Implications for Haze Production [#7025] Pluto’s surface is heterogeneous despite uniform deposition of haze particles onto it. We use the VT3D energy balance model to investigate if the atmosphere ever becomes sufficiently thin to interrupt haze production, explaining this heterogeneity.
11:15 a.m.	[INVITED] Erwin J. T. *	Atmospheric Escape [#7048] All planetary bodies with an atmosphere experience some process of atmospheric escape. In the context of Pluto, this topic remains active and continues to evolve as the New Horizons’ measurements are considered.
11:45 a.m.		Lunch Break

Wednesday, July 17, 2019

PLUTO’S GOT ATMOSPHERE II

1:30 p.m. Auditorium

Chairs: Amanda Sickafoose and Alissa Earle

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
1:30 p.m.	[INVITED] Bagenal F. * McNutt R. L. Jr. McComas D. J. Hill M. E. Kollmann P. Lisse C. M. Delamere P. A. Barnes N. P. New Horizons Science Team	Pluto Interaction with the Heliosphere [#7053] New Horizons’ SWAP and PEPSSI instruments measured plasma and charged particles. We review the history of studies of the solar wind interaction with Pluto, describe results from these instruments, and compare with models and with remote observations.
2:00 p.m.	Barnes N. P. * Delamere P. A.	Hybrid Simulations of Pluto’s Solar Wind Interaction [#7076] Pluto’s interaction with the solar wind is investigated by comparing simulations to data.
2:15 p.m.	Mandt K. E. * Luspay-Kuti A.	Comparative Planetology of the Ion Chemistry at Pluto, Titan, and Triton [#7047] We describe comparative planetology studies between Pluto and Titan and Triton to understand the origin and evolution of nitrogen at Pluto.
2:30 p.m.		Break

Wednesday, July 17, 2019

PLUTO’S CLIMATE AND REDISTRIBUTION OF VOLATILES

3:00 p.m. Auditorium

Chairs: Brian Holler and Perianne Johnson

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
3:00 p.m.	[INVITED] Earle A. M. * Binzel R. P. Young L. A. Bertrand T. Buie M. W. Cruikshank D. P. Ennico K. S. Forget F. Grundy W. M. Moore J. M. Olkin C. B. Schmitt B. Spencer J. R. Stansberry J. A. Stern S. A. Trafton L. M. Umurhan O. M. Weaver H. A. New Horizons Science Team	Volatile and Climate Cycles on Short and Long Timescales [#7044] This talk will explore Pluto’s insolation history and its implications for Pluto’s atmospheric pressure, surface temperatures, and volatile distributions over various timescales.
3:30 p.m.	[INVITED] Howard A. D. * Moore J. M.	Climate History of Pluto as Revealed by Its Landscapes [#7010] Pluto’s landforms are dominated by processes involving volatile sublimation, condensation, and flow. These processes are controlled by the several timescales of climate variation: seasonal, obliquity, and long-term evolution.
4:00 p.m.	Forget F. * Tanguy T.	Modeling Nitrogen and Methane Ices and Glaciers on Pluto over Diurnal, Seasonal, and Astronomical Timescales [#7003] To understand the origin and the evolution of Pluto N2 and CH4 ice reservoirs, we developed a hierarchy of models simulating the volatile cycles over multiple timescales: years with a 3D atm. model to millions of years with a volatile transport model.
4:15 p.m.	White O. L. * Moore J. M. Howard A. D. Keane J. T. Schenk P. M. Singer K. N. Stern S. A. Weaver H. A. Olkin C. B. Ennico K. Young L. A. New Horizons Geology and Geophysics Imaging Team	Washboard and Fluted Terrains on Pluto as Evidence for Ancient Glaciation [#7008] Our mapping and spatial analysis of Pluto’s washboard and fluted terrains leads us to hypothesize that they represent crustal debris that were deposited after recession of pitted glacial nitrogen ice from a portion of Pluto’s uplands via sublimation.
4:30 p.m.	Trafton L. M. * Tan S. Stansberry J. A.	On the Equilibrium State of Pluto’s Surface Ice [#7070] We investigate the contradiction between the excess atmospheric CH4 concentration and the apparent lack of saturation in Pluto’s N2-rich ice in terms of the composition of a thin, CH4-rich boundary layer on the N2-rich ice surface near equilibrium.
4:45 p.m.	Young L. A. * Tan S. P. Trafton L. M. Stansberry J. A. Grundy W. B. Protopapa S. Schmitt B. Umurhan O. M. Bertrand T.	On the Disequilibrium of Pluto’s Volatiles [#7039] The volatiles present as ices on Pluto’s surface and in its atmosphere are in state of disequilibrium. There is new work on predicted equilibrium, drivers to disequilibrium, and relaxation timescales.
5:00 p.m.	Lisse C. M. * Young L. A. Cruikshank D. P. Stern S. A. Keane J. T. Umurhan O. M. Gladstone G. R. Parker J. W. Binzel R. P. Earle A. M. Pendleton Y. J. Sandford S. A. Horanyi M. Weaver H. A. Cheng A. F. McNutt R. L. El-Maarry M. R. Moore J. M. Linscott I. R. Schmitt B. Kavelaars J. J. Britt D. T. Olkin C. B.	Pluto’s Hypervolatile Surface Ices Sourced from KBO Amorphous Water Ice Composites [#7037] We use the results from the NH MU69 flyby + new modeling of the thermal stability of MU69’s and Pluto’s ices to argue that slow accretion of small KBOs rich in hypervolatile-amorphous water ice composites is the source of Pluto’s hypervolatiles.
5:15 p.m.	Strobel D. Young L.	GUIDED DISCUSSION: New Insights to Pluto’s Atmosphere Composition, Structure, Processes, and Climate Variation
5:45 p.m.		END OF DAY 3

Thursday, July 18, 2019

BEYOND PLUTO: 2014 MU69 AND THE KUIPER BELT ENVIRONMENT

8:30 a.m. Auditorium

Chairs: Susan Benecchi and John Cooper

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
8:30 a.m.	[INVITED] Fornasier S. * Barucci M. A. Dalle Ore C.	The Kuiper Belt as the Context for Pluto [#7012] In this work we will give a state of the art overview of the physical properties of the Transneptunians and Centaurs, including composition, size, albedo, bulk density, and rotational and thermal properties.
9:00 a.m.	[INVITED] Spencer J. R. * Stern S. A. Weaver H. A. Olkin C. B. Moore J. M. Grundy W. M. McKinnon W. B. New Horizons Science Team	Beyond Pluto: The New Horizons Encounter with Kuiper Belt Object 2014 MU69 [#7057] The New Horizons flyby of the KBO 2014 MU69 gave the first close-up view of a member of the Cold Classical Kuiper Belt, the most primitive population of small bodies in the solar system. MU69 is a contact binary unlike anything previously seen.
9:30 a.m.	Benecchi S. D. * Zangari A. M. Verbiscer A. J. Porter S. B.	Kuiper Belt Lightcurves in Light of the Fly-By Results of 2014MU69 [#7061] We briefly review the current state of knowledge about Kuiper Belt lightcurves, we present the impact of geometry on various object configurations, and then attempt to de-bias the reported KBO lightcurve measurements for geometric considerations.
9:45 a.m.	Cooper J. F. *	Plasma and Radiation Environment in the Kuiper Belt: Pioneer to New Horizons [#7056] Orbits of Pluto and the Kuiper Belt Objects collectively span plasma and energetic particle radiation environments of the supersonic heliosphere, the heliosheath, and local interstellar space. Time-averaged flux spectra are derived for such regions.
10:00 a.m.		Break

Thursday, July 18, 2019

FUTURE INVESTIGATIONS OF THE PLUTO SYSTEM AND KUIPER BELT

10:30 a.m. Auditorium

Chairs: S. Alan Stern and Kelsi Singer

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
10:30 a.m.	Dalle Ore C. M. * Barucci M. A. Fornasier S. Cruikshank D. P. Grundy W. M. Protopapa S.	Pluto Data Before and After New Horizons: The Takeaway for Future Observations [#7040] We present what we have learned in the comparison of observations of Pluto taken before and after New Horizons, and we draw conclusions on how we should proceed with future observation planning of TNOs.
10:45 a.m.	[INVITED] Hofgartner J. D. * Buratti B. J. Buie M. W. Bray V. J. Lellouch E.	Future Spacecraft Missions to the Pluto System [#7022] An orbiter mission to the Pluto-Charon system would make fundamental contributions to all three crosscutting themes (formation, habitability, and workings) of planetary science.
11:15 a.m.		Lunch Break

Thursday, July 18, 2019

ORIGIN AND DYNAMICS OF THE PLUTO SYSTEM

1:00 p.m. Auditorium

Chairs: Douglas Hamilton and Kirby Runyon

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Times	Authors (*Denotes Presenter)	Abstract Title and Summary
1:00 p.m.	[INVITED] Neveu M. * Canup R. M. Kratter K. M.	On the Origin of the Pluto System [#7027] We describe constraints and review models for the origin of the Pluto-Charon binary and the small moons Styx, Nix, Kerberos, and Hydra. We also highlight open issues and discuss implications.
1:30 p.m. [INVITED]	Nimmo F. * McKinnon W. B.	Geodynamics of Pluto [#7013] Limited geophysical data suggest a partially- or fully-differentiated Pluto with a rigid, porous ice shell and a subsurface ocean that has been slowly refreezing, leading to surface expansion and, potentially, cryovolcanism.
2:00 p.m.	Keane J. T. * Matsuyama I.	True Polar Wander of Pluto [#7046] Pluto is a unique world where rotational dynamics, volatile transport, and geophysics collide. We will discuss past, current, and future work that use this confluence to explore Pluto’s interior and geologic history.
2:15 p.m.	Kamata S. * Nimmo F. Sekine Y. Kuramoto K. Noguchi N. Kimura J. Tani A.	An Interior Structure Model of Pluto that Solves its Geophysical and Geochemical Mysteries [#7009] Pluto is mysterious; extremely cold and depleted in heat but possesses a subsurface ocean; an ocean is present, but the overlying ice shell is cold; surface is rich in nitrogen unlike comets. These mysteries are solved by a single, simple idea.
2:30 p.m.	Runyon K. D. * Metzger P. T. Stern S. A. Bell J.	Dwarf Planets are Planets, Too: Planetary Pedagogy after New Horizons [#7016] Teaching students the natural organization of the solar system — especially dwarf planets like Pluto — benefits from ignoring the IAU planet definition and using the precedent set by planetary scientists counting dwarf planets as a class of full planet.
2:45 p.m.	[INVITED] McKinnon W. B. Glein C. R. Rhoden A. R. *	Formation, Composition, and History of the Pluto System: A Post-New-Horizons Synthesis [#7067] This talk draws on the phenomenal results of the 2015 New Horizons encounter with the Pluto system, and aims to synthesize and summarize what we have learned, highlighting some of the less understood or appreciated aspects of the system’s evolution.
3:15 p.m.	McKinnon W. Parker A.	GUIDED DISCUSSION: Origins of the Pluto System and the Future of Pluto - Kuiper Belt Exploration
3:45 p.m.		CLOSING ANNOUNCEMENTS
4:00 p.m.		END OF CONFERENCE