Table 1.
Physical parameters of Psyche derived in this study compared with previous works.
| Parameter | K02/D11 | S17 | H17 | D18 | This work |
|---|---|---|---|---|---|
| D (km) | 211 ± 21 | 226 ± 23 | 225 ± 4 | 223 ± 2 | 226 ± 5 |
| λ (∘) | 32 ± 5 | 34 ± 5 | 28 ± 4 | 32 ± 3 | 34 ± 3 |
| β (∘) | −7 ± 5 | −7 ± 5 | −6 ± 3 | −8 ± 3 | −9 ± 3 |
| P | 4.195948(1) | 4.195948(1) | 4.195948(1) | 4.195951(2) | 4.195948(1) |
| a (km) | 279 ± 27 | 293 ± 5 | 274 ± 2 | 290 ± 5 | |
| b (km) | 232 ± 23 | 234 ± 5 | 231 ± 4 | 245 ± 5 | |
| c (km) | 189 ± 19 | 167 ± 8 | 176 ± 3 | 170 ± 8 | |
| a/b | 1.24 | 1.17 ± 0.17 | 1.25 ± 0.03 | 1.18 ± 0.02 | 1.18 ± 0.03 |
| b/c | 1.27 | 1.21 ± 0.17 | 1.40 ± 0.07 | 1.31 ± 0.03 | 1.44 ± 0.07 |
| m (1018 kg) | 27.2 ± 7.5 | 22.3 ± 3.6 | 24.3 ± 3.5 | 24.1 ± 3.2 | |
| ρ (g cm−3) | 4.5 ± 1.4 | 3.7 ± 0.6 | 4.16 ± 0.64 | 3.99 ± 0.26 |
Notes. We list the volume-equivalent diameter D, dimensions along the major axes (a, b, c), sidereal rotation period P, pole ecliptic longitude λ and latitude β, mass m, and bulk density ρ. The uncertainties are reported at 1σ. K02: Kaasalainen et al. (2002) with diameter estimated from stellar occultation profiles by D11: Durech et al. (2011), S17: Shepard et al. (2017), H17: Hanus et al. (2017), D18: Drummond et al. (2018).
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