Velocity versus Time for Gliese 876 (points),
fit with two planets (solid line)
The planets have periods of 30.1 and 61.0 days.
(Data from Keck Observatory)
Data provided by California & Carnegie Planet Search Team
Refereed paper, Astrophys. J., vol 556, Jul 20, 2001
Fig1.ps.
Fig2.ps.
Fig3.ps.
Fig4.ps.
Fig5.ps.
Marcy et al. 1998 ApJL V 505, p147
Absolute Mass of GJ876b Resolved With HST Astrometry: December 2002
| Planet | Period |
T_peri (JD) |
ecc | omega (deg) |
Velocity Amp, K (m/s) |
Msini (M_jup) |
a (AU) |
|
| GJ876b | 61.02 day | 2450106.2 | 0.10 | 333 (12) | 210 | 1.89 | 0.21 | |
| GJ876c | 30.12 day | 2450031.4 | 0.27 | 330 (12) | 81 | 0.56 | 0.13 |
| RMS: 7.9 m/s |
| chi-squared: 1.85 |
| Spectral Type | Mass (M_sun) |
Apparent magnitude |
Distance (pc) |
P_rot (d) |
[Fe/H] | |
| M4 | 0.32 | 10.15 | 4.69 | - | 0.00 |