Using occultation-derived sizes and Herschel thermal data, the study identifies three previously unknown likely binary TNOs and reports satellite size estimates while confirming no sizable satellites are needed for three others.
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Full two-body simulations of Arrokoth's lobes demonstrate that shape irregularities produce gravitational torques orders of magnitude stronger than gas drag, causing rapid desynchronization and misalignment that none of the proposed pre-merger scenarios can prevent.
Updated shape model of Arrokoth finds significantly larger volume, 2:1 lobe ratio, spherical small lobe and oblate large lobe compared to prior work.
citing papers explorer
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Probing close-in satellites of Trans-Neptunian Objects through thermal and direct size measurements
Using occultation-derived sizes and Herschel thermal data, the study identifies three previously unknown likely binary TNOs and reports satellite size estimates while confirming no sizable satellites are needed for three others.
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Challenge in Arrokoth's single merger to achieve the shape's principal axis configuration
Full two-body simulations of Arrokoth's lobes demonstrate that shape irregularities produce gravitational torques orders of magnitude stronger than gas drag, causing rapid desynchronization and misalignment that none of the proposed pre-merger scenarios can prevent.
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The Shape of (486958) Arrokoth
Updated shape model of Arrokoth finds significantly larger volume, 2:1 lobe ratio, spherical small lobe and oblate large lobe compared to prior work.