Astrogeology Research Program

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IAU/IAG Working Group (WG) on Cartographic Coordinates and Rotational Elements

Size and shape of the planetary satellites

Tables: I - II - III - IV - V - VI

TABLE V

Size and shape parameters of the Satellites.

Planet		Satellite	Mean	Subplanetary	Along orbit	Polar	RMS deviation	Maximum	Maximum
			radius	equatorial	equatorial	radius	from ellipsoid	elevation	depression
			(km)	radius (km)	radius (km)	(km)	(km)	(km)	(km)

Earth

Moon

1737.4 ± 1

same

same

same

2.5

7.5

5.6

Mars	I	Phobos	11.1 ± 0.15	13.4	11.2	9.2	0.5
	II	Deimos	6.2 ± 0.18	7.5	6.1	5.2	0.2

Jupiter	XVI	Metis	21.5 ± 4	30		20	17
	XV	Adrastea	8.2 ± 4	10	8	7
	V	Amalthea	83.5 ± 3	125	73	64	3.2
	XIV	Thebe	49.3 ± 4	58	49	42
	I	Io	1821.46	1829.4	1819.3	1815.7	1.4	5-10	3
	II	Europa	1562.09	1564.13	1561.23	1560.93	0.5
	III	Ganymede	2632.345	2632.4	2632.29	2632.35	0.6
	IV	Callisto	2409.3	2409.4	2409.2	2409.3	0.6
	XIII	Leda	5
	VI	Himalia	85 ± 10
	X	Lysithea	12
	VII	Elara	40 ± 10
	XII	Ananke	10
	XI	Carme	15
	VIII	Pasiphae	18
	IX	Sinope	14

Saturn	XVIII	Pan	10 ± 3
	XV	Atlas	16 ± 4	18.5	17.2	13.5
	XVI	Prometheus	50.1 ± 3	74.0	50.0	34.0	4.1
	XVII	Pandora	41.9 ± 2	55.0	44.0	31.0	1.3
	XI	Epimetheus	59.5 ± 3	69.0	55.0	55.0	3.1
	X	Janus	88.8 ± 4	97.0	95.0	77.0	4.2
	I	Mimas	198.6 ± 0.6	209.1 ± 0.5	196.2 ± 0.5	191.4 ± 0.5	0.6
	II	Enceladus	249.4 ± 0.3	256.3 ± 0.3	247.3 ± 0.3	244.6 ± 0.5	0.4
	III	Tethys	529.8 ± 1.5	535.6 ± 1.2	528.2 ± 1.2	525.8 ± 1.2	1.7
	XIII	Telesto	11± 4	15 ± 2.5	12.5 ± 5	7.5 ± 2.5
	XIV	Calypso	9.5 ± 4	15.0	8.0	8.0	0.6
	IV	Dione	560 ± 5	same	same	same	0.5
	XII	Helene	16	17.5 ± 2.5		0.7
	V	Rhea	764 ±4	same	same	same
	VI	Titan	2575 ± 2	same	same	same
	VII	Hyperion	133 ± 8	164 ± 8	130 ± 8	107 ± 8	7.4
	VIII	Iapetus	718 ± 8	same	same	same	6.1	12
	IX	Phoebe	110 ± 10	115 ± 10	110 ± 10	105 ±10	2.7

Uranus	VI	Cordelia	13 ± 2
	VII	Ophelia	15 ± 2
	VIII	Bianca	21 ± 3
	IX	Cressida	31 ± 4
	X	Desdemona	27 ± 3
	XI	Juliet	42 ± 5
	XII	Portia	54 ± 6
	XIII	Rosalind	27 ± 4
	XIV	Belinda	33 ± 4
	XV	Puck	77 ± 5			1.9
	V	Miranda	235.8 ± 0.7	240.4 ± 0.6	234.2 ± 0.9	232.9 ± 1.2	1.6	5	8
	I	Ariel	578.9 ± 0.6	581.1 ± 0.9	577.9 ± 0.6	577.7 ± 1.0	0.9	4	4
	II	Umbriel	584.7 ± 2.8	same	same	same	2.6		6
	III	Titania	788.9 ± 1.8	same	same	same	1.3	4
	IV	Oberon	761.4 ± 2.6	same	same	same	1.5	12	2

Neptune	III	Naiad	29 ± 6
	IV	Thalassa	40 ± 8
	V	Despina	74 ± 10
	VI	Galatea	79 ± 12
	VII	Larissa	96 ± 7	104		89	2.9	6	5
	VIII	Proteus	208 ± 8	218	208	201	7.9	18	13
	I	Triton	1352.6 ± 2.4
	II	Nereid	170 ± 25

Pluto

I

Charon

593 ± 13