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Planetary Satellite Physical Parameters

The following table lists currently available physical parameters for planetary satellites. Table column headings are described below.

Satellites of
 
Planet
 
Satellite
 
Code
GM  (km3/s2) Mean Radius  (km) Mean Density  (g/cm3)
value sigma ref value sigma ref value sigma ref
Earth Moon 301 4902.800 0.001 DE440 1737.4 0.1 1 3.344 0.001 *
Mars Phobos 401 0.0007087 0.0000006 MAR097 11.08 0.04 1 1.872 0.076 *
Mars Deimos 402 0.0000962 0.0000028 MAR097 6.2 0.24 1 1.471 0.166 *
Jupiter Io 501 5959.91547 0.00052 JUP365 1821.49 0.50 1 3.5276 0.0029 *
Jupiter Europa 502 3202.71210 0.00050 JUP365 1560.80 0.30 1 3.0130 0.0017 *
Jupiter Ganymede 503 9887.83275 0.00017 JUP365 2631.20 1.70 1 1.9416 0.0038 *
Jupiter Callisto 504 7179.28340 0.00122 JUP365 2410.30 1.50 1 1.8340 0.0034 *
Jupiter Amalthea 505 0.16456 0.00818 JUP365 83.50 3.00 1 0.9250 0.1117 *
Jupiter Thebe 514 0.03015 0.01250 JUP365 49.30 4.00 1 0.9000 0.4327 *
Jupiter Adrastea 515 0.00014 0.00020 JUP365 8.20 4.00 1 0.9018 1.8507 *
Jupiter Metis 516 0.00250 0.00160 JUP365 21.50 4.00 1 0.9002 0.7642 *
Jupiter Himalia 506 0.15155 0.05763 JUP344 85.00 10.00 1 0.8827 0.4580 *
Saturn Mimas 601 2.50363 0.00014 SAT427 198.2 0.4 1 1.1502 0.0070 *
Saturn Enceladus 602 7.21050 0.00008 SAT427 252.1 0.2 1 1.6097 0.0038 *
Saturn Tethys 603 41.21405 0.00034 SAT427 531.0 0.6 1 0.9841 0.0033 *
Saturn Dione 604 73.11618 0.00005 SAT427 561.4 0.4 1 1.4781 0.0033 *
Saturn Rhea 605 153.94091 0.00040 SAT427 763.5 0.6 1 1.2372 0.0029 *
Saturn Titan 606 8978.13737 0.00025 SAT427 2574.73 0.09 1 1.8815 0.0002 *
Saturn Hyperion 607 0.37042 0.00005 SAT427 135.0 4.0 1 0.5385 0.0001 *
Saturn Iapetus 608 120.50818 0.00274 SAT427 734.3 2.8 1 1.0887 0.0125 *
Saturn Phoebe 609 0.55811 0.00176 SAT427 106.5 0.7 1 1.6526 0.0330 *
Saturn Janus 610 0.12662 0.00007 SAT415 89.2 0.8 1 0.6381 0.0172 *
Saturn Epimetheus 611 0.03514 0.00002 SAT415 58.2 1.2 1 0.6375 0.0394 *
Saturn Helene 612 0.00046 0.00004 SAT427 18.0 0.4 1 0.2792 0.0210 *
Saturn Atlas 615 0.00037 0.00001 SAT415 15.1 0.8 1 0.3850 0.0613 *
Saturn Prometheus 616 0.01071 0.00001 SAT415 43.1 1.2 1 0.4784 0.0400 *
Saturn Pandora 617 0.00926 0.00002 SAT415 40.6 1.5 1 0.4948 0.0549 *
Saturn Pan 618 0.00028 0.00014 SAT415 14.0 1.2 1 0.3650 0.2052 *
Uranus Ariel 701 83.5 1.4 URA111 578.9 0.6 1 1.539 0.026 *
Uranus Umbriel 702 85.1 1.9 URA111 584.7 2.8 1 1.523 0.041 *
Uranus Titania 703 226.9 4.1 URA111 788.9 1.8 1 1.653 0.032 *
Uranus Oberon 704 205.3 5.8 URA111 761.4 2.6 1 1.664 0.050 *
Uranus Miranda 705 4.3 0.2 URA111 235.8 0.7 1 1.178 0.053 *
Neptune Triton 801 1428.49546 0.61603 NEP097 1352.60 2.40 1 2.0649 0.0110 *
Neptune Nereid 802 0.00000 0.00000 NEP097 170.00 25.00 1 n/a n/a n/a
Neptune Naiad 803 0.00853 0.00480 NEP097 29.00 6.00 1 1.2511 1.0478 *
Neptune Thalassa 804 0.02359 0.00522 NEP097 40.00 8.00 1 1.3184 0.8432 *
Neptune Despina 805 0.11673 0.25263 NEP097 74.00 10.00 1 1.0304 2.2689 *
Neptune Galatea 806 0.18990 0.76278 NEP097 79.00 12.00 1 1.3777 5.5695 *
Neptune Larissa 807 0.25484 3.12230 NEP097 96.00 7.00 1 1.0303 12.626 *
Neptune Proteus 808 2.58342 2.42070 NEP097 208.00 8.00 1 1.0269 0.9695 *
Pluto Charon 901 105.88 0.28 PLU043 606.0 0.5 2 1.7018 0.0062 *
Pluto Nix 902 0.0030 0.0027 PLU043 18.0 2.0 3 1.8400 1.7660 *
Pluto Hydra 903 0.0032 0.0028 PLU043 18.5 2.0 3 1.8078 1.6870 *
Pluto Kerberos 904 0.0011 0.0006 PLU043 6.0 2.0 3 18.216 20.750 *
Pluto Styx 905 0.0000 0.0010 PLU043 5.2 2.0 3 n/a n/a n/a

Notes

Planet and Pluto GM Values

Planet GM (km3/s2) Reference
Earth 398600.436 ±0.001 DE440
Mars 42828.37362 ±0.0008 MAR097
Jupiter 126686531.9 ±0.18 JUP365
Saturn 37931206.15691 ±0.23744 SAT427
Uranus 5793951.3 ±4.4 URA111
Neptune 6835099.96845 ±9.63363 NEP097
Pluto 869.61 ±0.33 PLU043

Table Column Descriptions

GM See glossary definition of GM.
Mean Radius Radius of a sphere with the equivalent volume of the planetary satellite.
Mean Density Density computed using the volume of a sphere with the specified mean radius and mass (derived from GM) of the planet.

Mean Radius References

  1. B. A. Archinal, C. H. Acton, M. F. A’Hearn, et al. (2018) "Report of the IAU Working Group on Cartographic Coordinates and Rotational Elements: 2015". Celest.~Mech. 130:22.
  2. Francis Nimmo, Orkan Umurhan, Carey M. Lisse, Carver J. Bierson, Tod R. Lauer, Marc W. Buie, Henry B. Throop, Josh A. Kammer, James H. Roberts, William B. McKinnon, Amanda M. Zangari, Jeffrey M. Moore, S. Alan Stern, Leslie A. Young, Harold A. Weaver, Cathy B. Olkin, Kim Ennico (2017) "Mean radius and shape of Pluto and Charon from New Horizons images". Icarus 287:12-29.
  3. S. Alan Stern, William M. Grundy, William B. McKinnon, Harold A. Weaver, Leslie A. Young (2018) "The Pluto System After New Horizons". Annual Review of Astronomy and Astrophysics 56:357-392.
  4. R. A. Jacobson (2021) "The Orbits of the Regular Jovian Satellites and the Orientation of the Pole of Jupiter". submitted to AJ  : .