The K2 and TESS Synergy. III. Search and Rescue of the Lost Ephemeris for K2's First Planet
Erica Thygesen,
Joseph E. Rodriguez,
Zoë L. de Beurs
et al.
Abstract:K2-2 b/HIP 116454 b, the first exoplanet discovery by K2 during its Two-Wheeled Concept Engineering Test, is a sub-Neptune (2.5 ± 0.1 R
⊕, 9.7 ± 1.2 M
⊕) orbiting a relatively bright (K
S
= 8.03) K-dwarf star on a 9.1 day period. Unfortunately, due to a spurious follow-up transit detection and ephemeris degradation, the transit ephemeris for this planet was lost. In this work, we recover and refine the transit epheme… Show more
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