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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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