List[edit]

The Uranian moons are listed here by orbital period, from shortest to longest. Moons massive enough for their surfaces to have collapsed into a spheroid are highlighted in light blue and bolded. The inner and major moons all have prograde orbits. Irregular moons with retrograde orbits are shown in dark grey. Margaret, the only known irregular moon of Uranus with a prograde orbit, is shown in light grey. The orbits and mean distances of the irregular moons are variable over short timescales due to frequent planetary and solar perturbations, therefore the listed orbital elements of all irregular moons are averaged over a 8,000-year numerical integration by Brozović and Jacobson (2009).^[38] Their orbital elements are all based on the epoch of 1 January 2000 Terrestrial Time.^[39]

Uranian moons

Order  [d]	Label  [e]	Name	Pronunciation  (key)	Image	Abs. magn.	Diameter  (km)[f]	Mass  (× 1016 kg)[g]	Semi-major axis  (km)[39]	Orbital period  (d)[39][h]	Inclination (°)[39][i]	Eccentricity [41]	Discovery  year[1]	Discoverer  [1]
1	VI	¡Cordelia	/kÉ”Ë�rˈdiË�liÉ™/		10.3	40 ± 6  (50 × 36)	≈ 4.4	49770	+0.33503	0.08479°	0.00026	1986	Terrile  (Voyager 2)
2	VII	¡Ophelia	/oʊˈfiË�liÉ™/		10.2	43 ± 8  (54 × 38)	≈ 5.3	53790	+0.37640	0.1036°	0.00992	1986	Terrile  (Voyager 2)
3	VIII	¡Bianca	/biˈɑË�Å‹kÉ™/		9.8	51 ± 4  (64 × 46)	≈ 9.2	59170	+0.43458	0.193°	0.00092	1986	Smith  (Voyager 2)
4	IX	¡Cressida	/ˈkrÉ›sÉ™dÉ™/		8.9	80 ± 4  (92 × 74)	≈ 34	61780	+0.46357	0.006°	0.00036	1986	Synnott  (Voyager 2)
5	X	¡Desdemona	/ËŒdÉ›zdəˈmoÊŠnÉ™/		9.3	64 ± 8  (90 × 54)	≈ 18	62680	+0.47365	0.11125°	0.00013	1986	Synnott  (Voyager 2)
6	XI	¡Juliet	/ˈdÊ’uË�liÉ™t/		8.5	94 ± 8  (150 × 74)	≈ 56	64350	+0.49307	0.065°	0.00066	1986	Synnott  (Voyager 2)
7	XII	¡Portia	/ˈpÉ”Ë�rʃə/		7.7	135 ± 8  (156 × 126)	≈ 170	66090	+0.51320	0.059°	0.00005	1986	Synnott  (Voyager 2)
8	XIII	¡Rosalind	/ˈrÉ’zÉ™lÉ™nd/		9.1	72 ± 12	≈ 25	69940	+0.55846	0.279°	0.00011	1986	Synnott  (Voyager 2)
9	XXVII	¡Cupid	/ˈkjuË�pÉ™d/		12.6	≈ 18	≈ 0.38	74800	+0.61800	0.100°	0.0013	2003	Showalterand  Lissauer
10	XIV	¡Belinda	/bəˈlɪndÉ™/		8.8	90 ± 16  (128 × 64)	≈ 49	75260	+0.62353	0.031°	0.00007	1986	Synnott  (Voyager 2)
11	XXV	¡Perdita	/ˈpÉœË�rdÉ™tÉ™/		11.0	30 ± 6	≈ 1.8	76400	+0.63800	0.0°	0.0012	1999	Karkoschka  (Voyager 2)
12	XV	¡Puck	/ˈpÊŒk/		7.3	162 ± 4	≈ 290	86010	+0.76183	0.3192°	0.00012	1985	Synnott  (Voyager 2)
13	XXVI	¡Mab	/ˈmæb/		12.1	≈ 25	≈ 1.0	97700	+0.92300	0.1335°	0.0025	2003	Showalter and  Lissauer
14	V	†Miranda	/məˈrændÉ™/		3.5	471.6 ± 1.4  (481 × 468 × 466)	6400±300	129390	+1.41348	4.232°	0.0013	1948	Kuiper
15	I	†Ariel	/ˈɛəriÉ›l/		1.0	1157.8±1.2  (1162 × 1156 × 1155)	125100±2100	191020	+2.52038	0.260°	0.0012	1851	Lassell
16	II	†Umbriel	/ˈʌmbriÉ™l/		1.7	1169.4±5.6	127500±2800	266300	+4.14418	0.205°	0.0039	1851	Lassell
17	III	†Titania	/təˈtÉ‘Ë�niÉ™/		0.8	1576.8±1.2	340000±6100	435910	+8.70587	0.340°	0.0011	1787	Herschel
18	IV	†Oberon	/ˈoÊŠbÉ™rÉ’n/		1.0	1522.8±5.2	307600±8700	583520	+13.4632	0.058°	0.0014	1787	Herschel
19	XXII	‡Francisco	/frænˈsɪskoÊŠ/		12.4	≈ 22	≈ 0.72	4282900	−267.09	147.250°	0.1324	2003[j]	Holman et al.
20	XVI	‡Caliban	/ˈkælɪbæn/		9.1	42+20 −12	≈ 25	7231100	−579.73	141.529°	0.1812	1997	Gladman et al.
21	XX	‡Stephano	/ˈstÉ›fÉ™noÊŠ/		9.7	≈ 32	≈ 2.2	8007400	−677.47	143.819°	0.2248	1999	Gladman et al.
22	XXI	‡Trinculo	/ˈtrɪŋkjÊŠloÊŠ/		12.7	≈ 18	≈ 0.39	8505200	−749.40	166.971°	0.2194	2001	Holman et al.
23	XVII	‡Sycorax	/ˈsɪkÉ™ræks/		7.4	157+23 −15	≈ 230	12179400	−1288.38	159.420°	0.5219	1997	Nicholson et al.
24	XXIII	±Margaret	/ˈmÉ‘Ë�rÉ¡É™rÉ™t/		12.7	≈ 20	≈ 0.54	14146700	+1661.00	57.367°	0.6772	2003	Sheppardand  Jewitt
25	XVIII	‡Prospero	/ˈprÉ’spÉ™roÊŠ/		10.5	≈ 50	≈ 8.5	16276800	−1978.37	151.830°	0.4445	1999	Holman et al.
26	XIX	‡Setebos	/ˈsÉ›tÉ›bÊŒs/		10.7	≈ 48	≈ 7.5	17420400	−2225.08	158.235°	0.5908	1999	Kavelaars et al.
27	XXIV	‡Ferdinand	/ˈfÉœË�rdÉ™nænd/		12.5	≈ 20	≈ 0.54	20430000	−2790.03	169.793°	0.3993	2003[j]	Holman et al.

Sources: NASA/NSSDC,^[39] Sheppard, et al. 2005.^[3] For the recently discovered outer irregular moons (Francisco through Ferdinand) the most accurate orbital data can be generated with the Minor Planet Center's Natural Satellites Ephemeris Service.^[37] The irregulars are significantly perturbed by the Sun.^[3]