This repository contains code and datasets associated with the paper:
Greshko, Michael A. (2026). Two Eccentric, Long-period Eclipsing Binaries from TESS and ATLAS. Prepared for submission to Research Notes of the American Astronomical Society.
While inspecting light curves from the Transiting Exoplanet Survey Satellite (TESS), I found two eclipses each in the Sun-like stars TIC 149762453 and TIC 332229223. Combining TESS with archival photometry, mainly from the Asteroid Terrestrial-impact Last Alert System, I determined their periods: 23.21889±0.00041 days for TIC 149762453, a candidate double-lined spectroscopic binary, and 23.675868 ± 0.000013 days for TIC 332229223. Modeling the eclipses’ shapes and durations while incorporating Gaia astrometry and radial velocities from Gaia and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope suggests both orbits are highly eccentric (e≈0.60 and 0.67).
Unless otherwise indicated, the source code contained in this repository is provided under the modified MIT license below.
Copyright (c) 2026, Michael A. Greshko.
Permission is hereby granted, free of charge, to any person obtaining a copy of this software, datasets, and associated documentation files (the "Software and Datasets"), to deal in the Software and Datasets without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software and Datasets, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
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Greshko, Michael A. (2026). Two Eccentric, Long-period Eclipsing Binaries from TESS and ATLAS. Prepared for submission to Research Notes of the American Astronomical Society.
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