2016AJ....152..193B

Query : 2016AJ....152..193B

2016AJ....152..193B - Astron. J., 152, 193-193 (2016/December-0)

EPIC 211391664b: a 32 M⊕ Neptune-size planet in a 10 day orbit transiting an F8 star.

BARRAGAN O., GRZIWA S., GANDOLFI D., FRIDLUND M., ENDL M., DEEG H.J., CAGIGAL M.P., LANZA A.F., PRADA MORONI P.G., SMITH A.M.S., KORTH J., BEDELL M., CABRERA J., COCHRAN W.D., CUSANO F., CSIZMADIA S., EIGMULLER P., ERIKSON A., GUENTHER E.W., HATZES A.P., NESPRAL D., PATZOLD M., PRIETO-ARRANZ J. and RAUER H.

Abstract (from CDS):

We report the discovery of K2-98b (EPIC 211391664b), a transiting Neptune-size 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. K2-98b is a warm Neptune-like planet in a 10 day orbit around a V = 12.2 mag F-type star with M* = 1.074 ± 0.042 M☉, R* = 1.311–0.048+0.083R☉, and age of 5.2–1.0+1.2 Gyr. We derive a planetary mass and radius of Mp = 32.2 ± 8.1 M⊕ and Rp = 4.3–0.2+0.3R⊕. K2-98b joins the relatively small group of Neptune-size planets whose mass and radius have been derived with a precision better than 25%. We estimate that the planet will be engulfed by its host star in ∼3 Gyr, due to the evolution of the latter toward the red giant branch.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): planets and satellites: detection - planets and satellites: individual: (K2-98b (EPIC 211391664b) - stars: fundamental parameters - stars: fundamental parameters

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * 37 Gem * 06 55 18.6663587832 +25 22 32.503553004   6.343 5.748     G0V 246 0
2 K2-98 Em* 08 25 57.1878020136 +11 30 40.081742604   12.65 12.17 12.13   F7 29 0
3 K2-98b Pl 08 25 57.1878020136 +11 30 40.081742604           ~ 19 0

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