Table 1
Properties of the small Saturnian satellites.
Satellite | Rm | M | ρ | a | g | Vs |
---|---|---|---|---|---|---|
Pan | 14.0 | 0.495 | 430 | 133 584 | 0.17 | 16.85 |
Daphnis | 3.8 | 7.7 × 10−3 | 340 | 136 504 | 3.6 × 10−2 | 16.67 |
Atlas | 15.1 | 0.66 | 460 | 137 670 | 0.19 | 16.59 |
Prometheus | 43.1 | 15.95 | 470 | 139 380 | 0.57 | 16.49 |
Pandora | 40.6 | 13.71 | 490 | 141 720 | 0.56 | 16.36 |
Epimetheus | 58.2 | 52.66 | 640 | 151 410 | 1.04 | 15.83 |
Janus | 89.2 | 189.75 | 630 | 151 460 | 1.57 | 15.83 |
Aegaeon | 0.33 | 6 × 10−6 | 540 | 167 425 | 4.9 × 10−3 | 15.05 |
Methone | 1.45 | 9 × 10−4 | 310 | 194 440 | 1.2 × 10−2 | 13.97 |
Anthe | 0.5 | 1.5 × 10−4 | 500 | 197 700 | 7 × 10−3 | 13.88 |
Pallene | 2.23 | 3 × 10−3 | 250 | 212 280 | 1.5 × 10−2 | 13.37 |
Telesto | 12.4 | 0.674 | 500 | 294 710 | 0.17 | 11.35 |
Calypso | 9.6 | 0.315 | 500 | 294 710 | 0.13 | 11.35 |
Polydeuces | 1.3 | 4.5 × 10−4 | 500 | 377 200 | 1.8 × 10−2 | 10.03 |
Helene | 18.0 | 1.139 | 400 | 377 420 | 0.2 | 10.03 |
Hyperion | 135.0 | 561.99 | 544 | 1 500 933 | 2.05 | 5.03 |
Notes. The table lists: mean radius Rm in km from Thomas et al. (2013); mass M in units of 1019 g taken from the JPL planetary satellite physical parameters file except for Janus, Epimetheus, Atlas, Prometheus, and Pandora from Jacobson et al. (2008), Pan and Daphnis from Porco et al. (2007), and Hyperion from Thomas et al. (2007); mean density ρ in kg m−3 from Thomas et al. (2013; densities of Calypso, Telesto, and Helene are assumed and those of Aegaeon, Methone, and Pallene are inferred) except for Anthe and Polydeuces which are from the JPL planetary satellite physical parameters file1; semi-major axis a in km from Porco et al. (2007) except for Hyperion from Thomas et al. (2007) and Aegaeon from the JPL ephemeris file SAT342; surface gravity g in cm s −2 and orbital velocity Vs in km s−1.
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