Table 1.
Fitting parameters, their initial values, and the boundaries.
| Parameter | Starting point | Boundaries |
|---|---|---|
| M0 (M⊙) | 4.2 × 106 | ±5 × 105 |
| R0 (kpc) | 8.25 | ±1.0 |
| vz, 0 (km s−1) | 0 | ±5 |
| aS2 (″) | 0.125 | ±0.02 |
| eS2 | 0.87 | ±0.05 |
| iS2 (°) | 134 | ±5 |
| ΩS2 (°) | 228 | ±5 |
| ωS2 (°) | 66 | ±5 |
| Tperi, S2 (y) | 2018.4 | ±0.2 |
| Mi (M⊙) | 5010 | ±5000 |
| ai (″) | 0.51 | ±0.5 |
| ei | 0.48 | ±0.47 |
| ii (°) | 180 | ±180 |
| Ωi (°) | 180 | ±180 |
| ωi (°) | 180 | ±180 |
| μi (°) | 180 | ±180 |
Notes. Not listed are the Sgr A* parameters (x0, y0, z0, vx, 0, vy, 0), which are also allowed to vary.
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