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Weywot, an Unusually Low-albedo Satellite in the Trans-Neptunian Region

  • Authors: Estela Fernández-Valenzuela, Bryan J. Holler, Jose Luis Ortiz, Flavia Luane Rommel, Benjamin Proudfoot, Cameron Collyer, Mónica Vara-Lubiano, Nicolas Morales, Rodrigo Leiva, Marc W. Buie, Stephen E. Levine, Michael Collins, Vadim Nikitin, Michael F. Skrutskie, Anne J. Verbiscer, Wayne Rosing, Bruno Morgado, Altair Ramos Gomes Júnior, Mike Kretlow, Josselin Desmars, Chrystian Luciano Pereira, Xavier Inosencio, Pablo Santos-Sanz, Yücel Kiliç, John Stansberry, Rosemary Pike, Amanda A. Sickafoose, Carlos A. Zuluaga, Amanda S. Bosh, Michael J. Person, Karsten Schindler, Robert Jones, Riley DeColibus, Joel H. Castro-Chacón, Nancy Chanover, Russet McMillan, Richard Boyle, Aaron Golden, Michael Ryan, Ryder Strauss, Hannah Zigo, Simon Porter, Malia Kao

Estela Fernández-Valenzuela et al 2026 The Astrophysical Journal Letters 1002 .

  • Provider: AAS Journals

Caption: Figure 2.

Prediction maps for the three stellar occultations observed on (A) 2023 May 4, (B) 2023 May 24, and (C), (D) 2023 June 22. Dashed black lines represent the predicted shadow paths, while solid blue lines correspond to the actual shadow trajectories derived from updated orbital fits of Weywot (B. Proudfoot et al. 2025a). Red circles indicate observatories with negative detections, green squares indicate positive detections, and yellow diamonds denote technical issues (in this specific case, producing inconclusive data). Panel (D) provides a zoom-in of the pink rectangle region in panel (C). Maps were created using the free and open-source software QGIS v3.44.4 (Q. D. Team 2025) and the QuickMapServices catalog hosted by NextGIS (NextGIS 2024), specifically the Global Multi-Resolution Topography (W. B. F. Ryan et al. 2009). See Table 2 for observatory acronyms.

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