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Prada Moroni, Sascha Grziwa, Szilard Csizmadia, William D. Cochran","submitted_at":"2016-08-03T12:42:14Z","abstract_excerpt":"We report the discovery of K2-98 b (EPIC 211391664 b), a transiting Neptune-sized planet monitored by the K2 mission during its campaign 5. We combine the K2 time-series data with ground-based photometric and spectroscopic follow-up observations to confirm the planetary nature of the object and derive its mass, radius, and orbital parameters. K2-98 b is a warm Neptune-like planet in a 10-day orbit around a V=12.2~mag F-type star with $M_\\star$=$ 1.074\\pm0.042$, $R_\\star$=$ 1.311 ^{+ 0.083} _{ - 0.048} $, and age of $5.2_{-1.0}^{+1.2}$~Gyr. 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