Planetary Satellite Physical Parameters (original) (raw)

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	0.00135	JUP365	1821.49	0.50	1	3.5276	0.0029	*
Jupiter	Europa	502	3202.71210	0.00181	JUP365	1560.80	0.30	1	3.0130	0.0017	*
Jupiter	Ganymede	503	9887.83275	0.00247	JUP365	2631.20	1.70	1	1.9416	0.0038	*
Jupiter	Callisto	504	7179.28340	0.00324	JUP365	2410.30	1.50	1	1.8340	0.0034	*
Jupiter	Amalthea	505	0.16456	0.00867	JUP365	83.50	3.00	1	1.0111	0.1213	*
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	2.50349	0.00014	SAT441	198.20	0.40	1	1.1501	0.0070	*
Saturn	Enceladus	602	7.21037	0.00009	SAT441	252.10	0.20	1	1.6097	0.0038	*
Saturn	Tethys	603	41.21353	0.00031	SAT441	531.10	0.60	1	0.9840	0.0033	*
Saturn	Dione	604	73.11607	0.00005	SAT441	561.40	0.40	1	1.4781	0.0032	*
Saturn	Rhea	605	153.94175	0.00041	SAT441	763.50	0.60	1	1.2372	0.0029	*
Saturn	Titan	606	8978.13710	0.00025	SAT441	2574.76	0.02	1	1.8814	0.0001	*
Saturn	Hyperion	607	0.37049	0.00005	SAT441	135.00	4.00	1	0.5386	0.0479	*
Saturn	Iapetus	608	120.51511	0.00242	SAT441	734.30	2.80	1	1.0887	0.0125	*
Saturn	Phoebe	609	0.55479	0.00108	SAT441	106.50	0.70	1	1.6428	0.0326	*
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	0.00048	0.00002	SAT441	18.00	0.40	1	0.2918	0.0217	*
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	NEP101	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	106.1	0.3	PLU060	606.0	0.5	2	1.853	0.004	*
Pluto	Nix	902	0.0015	0.0005	PLU060	18.0	1.0	3	0.88	0.31	*
Pluto	Hydra	903	0.0020	0.0003	PLU060	18.5	1.0	3	1.21	0.19	*
Pluto	Kerberos	904	<0.0002	n/a	PLU060	6.0	1.0	3	n/a	n/a	n/a
Pluto	Styx	905	<0.0003	n/a	PLU060	5.2	1.0	3	n/a	n/a	n/a

Notes

GM of the satellite is taken from the specified ephemeris.
Mean Radius references are listed below.
[ ref=* ] Mean Density is derived from the specified GM and Mean Radius.

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 ±0.42	JUP365
Saturn	37931206.23 ±0.24	SAT441
Uranus	5793951.3 ±4.4	URA111
Neptune	6835099.97 ±9.63	NEP097
Pluto	869.3 ±0.4	PLU060

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

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.
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.
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.
R. A. Jacobson (2021) "The Orbits of the Regular Jovian Satellites and the Orientation of the Pole of Jupiter". submitted to AJ : .
R. A. Jacobson (2021) "The Orbits of the Major Saturnian Satellites,the Trajectories of Spacecraft at Saturn, the Gravity Field of the Saturnian System, and the Orientation of Saturn's Pole". personal communication to Horizons/NAIF.