本帖最后由 SamuelHan 于 2016-3-29 09:56 编辑
https://en.wikipedia.org/wiki/HD_189733_b
Wiki汇总的资料:
主星
Star HD 189733 A
Constellation Vulpecula
Right ascension (α) 20h 00m 43.71s[1]
Declination (δ) +22° 42′ 39.1″[1]
Apparent magnitude (mV) 7.66
Distance 63.4 ± 0.9[1] ly ,(19.5 ± 0.3[1] pc)
Spectral type K1–2V
Mass (m) 0.846+0.068 − 0.049[2] M☉
Radius (r) 0.781 ± 0.051 R☉
Temperature (T) 4939 ± 158 K
Metallicity [Fe/H] −0.03 ± 0.04
Age >0.6 Gyr
行星
Mass (m) 1.162+0.058/-0.039 [2] MJ
Radius (r) 1.138 ± 0.027 RJ
Stellar flux (F⊙) 275 ⊕
Geometric Albedo (Ag) 0.40 ± 0.12 (290–450 nm),< 0.12 (450–570 nm)
Surface gravity (g) 21.2 m/s²
Temperature (T) 1117 ± 42
轨道
Semi-major axis (a) 0.03099 ± 0.0006 AU,(4.636 ± 0.09 Gm)
Periastron (q) 0.03096 AU,(4.632 Gm)
Apastron (Q) 0.03102 AU,(4.641 Gm)
Eccentricity (e) 0.0010 ± 0.0002
Orbital period (P) 2.2185733 ± 0.00002 d, (53.245759 h)
Orbital speed (υ) 152.5 km/s
Inclination (i) 85.76 ± 0.29°
Time of transit (Tt) 2,453,988.80336 ± 0.00024 JD
Semi-amplitude (K) 205 ± 6 m/s
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