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The planet TrES-3b is named Umbäässa. The name was selected in the NameExoWorlds campaign by Liechtenstein, during the 100th anniversary of the IAU. In the local dialect of southern Liechtenstein, Umbäässa is a small and barely visible ant.
The radial velocity trend of the star that hosts TrES-3.
Transits in front of the star GSC 03089-00929 were detected by two 10 cm telescopes operating out of Palomar and Lowell Observatories. Transits of TrES-3 were also independently observed by the Hungarian Automated Telescope Network. Seven high-precision radial velocity measurements were made using the HIRES spectrometer at W. M. Keck Observatory, which confirmed the presence of a planetary mass companion with a minimum mass twice that of the planet Jupiter.
Characteristics
The planet's home star is slightly smaller and cooler than the Sun. The orbital period is less than one and a third days, one of the shortest known. Despite close proximity to the star, no evidence of tidal-driven orbital decay was present as in 2020, with best data fit indicating only an apsidal precession of planetary orbit.
Saeed, M. I.; Goderya, S. N.; Chishtie, F. A. (2020), Multi-color photometry and parameters estimation of Jupiter-sized exoplanets; TRES-3b, WASP-2b and HATP-30b, arXiv:2011.07169
Size comparison of TrES-3b with Jupiter.
Media related to TrES-3 at Wikimedia Commons
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