Table 1
Equatorial coordinates, optical and near-infrared magnitude, and stellar parameters of GJ 9827.
| GJ 9827 | |
|---|---|
| RAa (J2000.0) | 23:27:04.83647 |
| Deca (J2000.0) | −01:17:10.5816 |
| Distancea (pc) | 29.6864 ± 0.1033 |
| V -band magnitudeb (mag) | 10.35 ± 0.10 |
| J-band magnitudec (mag) | 7.984 ± 0.020 |
| Spectral typed | K6 V |
| Effective temperaturee Teff (K) | 4219 ± 70 |
| Surface gravitye log g⋆ (cgs) | 4.657 ± 0.042 |
| Iron abundancee [Fe/H] (dex) | − 0.29 ± 0.12 |
| Masse M⋆ (M⊙) | 0.637 ± 0.051 |
| Radiuse R⋆ (R⊙) | 0.622 ± 0.051 |
| Projected rot. velocitye v sin i⋆ (km s−1) | 1.5 ± 1.0 |
| Microturbulent velocityf vmic (km s−1) | 0.9 (fixed) |
| Macroturbulent velocityg vmac (km s−1) | 0.5 (fixed) |
| Interstellar reddening Av (mag)e | 0.04 ± 0.08 |
Notes. (a) Gaia DR2 (Gaia Collaboration et al. 2018). The quoted uncertainty takes into account possible Gaia systematics following Luri et al. (2018). (b) (Mumford 1956). (c) 2MASS (Skrutskie et al. 2006). (d)Houdebine et al. (2017). (e)This work. (f) Bruntt et al. (2010). (g)Gray (2008).
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