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Table 1

Physical properties of the GJ 3470 system.

Parameters Symbol Value Reference
Distance from Earth D* 29.45 ± 0.07 pc
Star radius R* 0.547 ± 0.018 R Awiphan et al. 2016
Star mass M* M Demory et al. 2013
Star rotation period P* 20.70 ± 0.15 d Biddle et al. 2014
Star age τ* ~2 Gyr This work
Heliocentric stellar radial velocity γ*∕⊙ 26.51691 ± 5.3 × 10−4 km s−1 Bonfils et al. 2012
Planet radius (358 nm) Rp 4.8 ± 0.2 REarth Chen et al. 2017
Planet mass Mp 13.9 ± 1.5 MEarth Demory et al. 2013
Orbital period Pp 3.33665173 ± 5.9 × 10−7 days Chen et al. 2017
Transit center T0 2455983.70417 ± 0.00011 BJDTDB Chen et al. 2017
Semi-major axis ap 0.0355 ± 0.0019 au Awiphan et al. 2016
Eccentricity e
Argument of periastron ω
Inclination ip Awiphan et al. 2016

Notes. The distance from GJ 3470 was derived from its Gaia parallax measurement (33.96 ± 0.06 mas; Gaia Collaboration 2016, 2018). The values for e and ω were derived from radial velocity measurements of GJ 3470 (X. Bonfils, priv. comm.).

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