The Orbit of Transneptunian Binary Manwë and Thorondor and their Upcoming Mutual Events

Abstract

A new Hubble Space Telescope observation of the 7:4 resonant transneptunian binary system (385446) Manwë has shown that, of two previously reported solutions for the orbit of its satellite Thorondor, the prograde one is correct. The orbit has a period of 110.18 $\pm$ 0.02 days, semimajor axis of 6670 $\pm$ 40 km, and an eccentricity of 0.563 $\pm$ 0.007. It will be viewable edge-on from the inner solar system during 2015-2017, presenting opportunities to observe mutual occultation and eclipse events. However, the number of observable events will be small, owing to the long orbital period and expected small sizes of the bodies relative to their separation. This paper presents predictions for events observable from Earth-based telescopes and discusses the associated uncertainties and challenges.

arXiv comment15 pages, 3 figures, 5 tables

References in corpus (20)

• "TNOs are Cool": A survey of the trans-Neptunian region X. Analysis of classical Kuiper belt objects from Herschel and Spitzer observations
• The Resonant Transneptunian Populations
• Evidence for Two Populations of Classical Transneptunian Objects: The Strong Inclination Dependence of Classical Binaries
• The Diverse Solar Phase Curves of Distant Icy Bodies. Part I: Photometric Observations of 18 Trans-Neptunian Objects, 7 Centaurs, and Nereid
• "TNOs are Cool": A Survey of the Transneptunian Region IV. Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS
• "TNOs are Cool": A survey of the trans-Neptunian region VI. Herschel/PACS observations and thermal modeling of 19 classical Kuiper belt objects
• TNOs are Cool: A survey of the trans-Neptunian region. VIII. Combined Herschel PACS and SPIRE observations of 9 bright targets at 70--500 micron
• The Correlated Colors of Transneptunian Binaries
• Kozai cycles, tidal friction and the dynamical evolution of binary minor planets
• Five New and Three Improved Mutual Orbits of Transneptunian Binaries
• The density of mid-sized Kuiper belt object 2002 UX25 and the formation of the dwarf planets
• The Color Differences of Kuiper Belt Objects in Resonance with Neptune
• Color-Inclination Relation of the Classical Kuiper Belt Objects
• Orbital properties of binary minor planets
• Mutual Orbits and Masses of Six Transneptunian Binaries
• KCTF Evolution of Trans-Neptunian Binaries: Connecting Formation to Observation
• Inclination Mixing in the Classical Kuiper Belt
• Mutual Events in the Cold Classical Transneptunian Binary System Sila and Nunam
• Origin of the peculiar eccentricity distribution of the inner cold Kuiper belt
• The Rotational Light Curve of (79360) Sila-Nunam, an Eclipsing Binary in the Kuiper Belt

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• Beyond Point Masses. II. Non-Keplerian Shape Effects are Detectable in Several TNO Binaries
• Colors of Trans-Neptunian Contact Binaries