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Reorientation[5-7] due to tidal and rotational torques can explain SP's location, but requires it to be a positive gravity anomaly[7], despite its negative topography. Here we argue that if SP formed via impact and if Pluto possesses a subsurface ocean, a positive gravity anomaly would naturally result because of shell thinning and ocean uplift, followed by lat","authors_text":"A. Chaikin, A. Cheng, A.D. Howard, A. Earle, A. Marcotte, A. Parker, A. Steffl, A. Verbiscer, A. Zangari, B. Buratti, B. Carcich, C. Chavez, C. Conrad, C. Dalle Ore, C. Howett, C.J. Bierson, C. Lisse, C. Olkin, C. Tsang, D. Cruikshank, D.P. Hamilton, D. Reuter, D. Strobel, F. Nimmo, H. A. Weaver, H. Reitsema, . H. Throop, H. Weaver, H. Winters, I. Linscott, Imaging Theme Team), J. Hofgartner, J.H. Roberts, J. Kammer, J.M. Moore, J. Parker, J.R. Spencer, J. Stansberry, K. E. Smith (New Horizons Geology Geophysics, K. Retherford, K. Runyon, K. Singer, L. A. Young, L. Tyler, M. Banks, M. Buie, M. Saina, M. Showalter, M. Summers, O. Barnouin, O.L. White, O.M. Umurhan, R.A. Beyer, R. Gladstone, R.P. Binzel, R. Schindhelm, S. A. Stern, S. Porter, S. Robbins, T.Lauer, T. Stryk, V. Bray, W.B. McKinnon P.M. Schenk, W. 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