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Uranus' natural satellites

From Academic Kids

Uranus has 27 known moons. The first two moons (Titania and Oberon) were discovered by William Herschel on March 13, 1787. Two more moons (Ariel and Umbriel) were discovered by William Lassell in 1851. In 1852, Herschel's son John Herschel gave the four then-known moons their names. In 1948 Gerard Kuiper discovered the moon Miranda.

The flyby of the Voyager 2 space probe in January 1986 led to the discovery of a further 10 moons, and another satellite S/1986 U 10 was later found after studying old Voyager photographs. Eleven additional moons have since been identified using telescopes.

All moons of Uranus are named after characters from the works of Shakespeare and Alexander Pope.

Moons of Uranus compared

The natural satellites

Notes: * Awaiting confirmation and naming; ** Negative orbital periods indicate a retrograde orbit around Uranus (opposite to the planet's rotation).
Name

(Pronunciation key)

Mean diameter (km) Mass (kg) Mean orbital
radius (km)
Orbital period Discovery date
Uranus VI Cordelia kor-dee'-lee-a 40 6 4.5 × 1016 ? 49,770 0.335034 days 1986
Uranus VII Ophelia oe-fee'-lee-a 43 8 5.4 × 1016 ? 53,790 0.376400 days 1986
Uranus VIII Bianca bee-aang'-ka 51 4 9.3 × 1016 ? 59,170 0.434579 days 1986
Uranus IX Cressida kres'-i-da 80 4 3.43 × 1017 ? 61,780 0.463570 days 1986
Uranus X Desdemona dez'-di-moe'-na 64 8 1.78 × 1017 ? 62,680 0.473650 days 1986
Uranus XI Juliet jew'-lee-et' 94 8 5.57 × 1017 ? 64,350 0.493065 days 1986
Uranus XII Portia por'-sha 135 8 1.68 × 1018 ? 66,090 0.513196 days 1986
Uranus XIII Rosalind roz'-a-lind 72 12 2.54 × 1017 ? 69,940 0.558460 days 1986
S/2003 U 2* ~ 10 Unknown 74,800 0.618 days 2003
Uranus XIV Belinda be-lin'-da 81 16 3.57 × 1017 ? 75,260 0.623527 days 1986
S/1986 U 10* ~ 20 Unknown 76,420 0.638 days 1986
Uranus XV Puck puk' 162 4 2.89 × 1018 ? 86,010 0.761833 days 1986
S/2003 U 1* ~ 10 Unknown 97,734 0.923 days 2003
Uranus V Miranda mi-ran'-da 471.6 1.4 (6.6 0.7) × 1019 129,390 1.413479 days 1948
Uranus I Ariel air'-ee-ul 1157.8 1.2 (1.35 0.12) × 1021 191,020 2.520379 days 1851
Uranus II Umbriel um'-bree-ul 1169.4 5.6 (1.17 0.13) × 1021 266,300 4.144177 days 1851
Uranus III Titania ti-taan'-ya 1577.8 3.6 (3.53 0.09) × 1021 435,910 8.705872 days 1787
Uranus IV Oberon oe'-bur-on 1522.8 5.2 (3.01 0.07) × 1021 583,520 13.463239 days 1787
S/2001 U 3* ~ 12 1.3 × 1015 ? 4,276,000 -266.6 days** 2001
Uranus XVI Caliban kal'-i-ban ~ 98 7.3 × 1017 ? 7,231,000 -579.7 days** 1997
Uranus XX Stephano stef'-a-noe ~ 20 6 × 1015 ? 8,004,000 -677.4 days** 1999
Uranus XXI Trinculo tring'-kew-loe ~ 10 7 × 1014 ? 8,504,000 -759.0 days** 2001
Uranus XVII Sycorax sik'-or-aks ~ 190 5.4 × 1018 ? 12,179,000 -1288.3 days** 1997
S/2003 U 3* ~ 11 1.3 × 1015 ? 14,345,000 1694.8 days 2003
Uranus XVIII Prospero pros'-pur-oe ~ 30 2.1 × 1016 ? 16,256,000 -1977.3 days** 1999
Uranus XIX Setebos set'-e-bus ~ 30 2.1 × 1016 ? 17,418,000 -2234.8 days** 1999
S/2001 U 2* ~ 12 Unknown 20,901,000 -2823.4 days** 2001

Sources: NASA/NSSDC (http://nssdc.gsfc.nasa.gov/planetary/factsheet/uraniansatfact.html) and University of Hawaii (http://www.ifa.hawaii.edu/~sheppard/satellites/urasatdata.html). These sources give no information on the masses for the small satellites; some data have changed greatly so it is unlikely that these old values are correct.

Naming notes

Some asteroids share the same names as moons of Uranus: 171 Ophelia, 218 Bianca, 593 Titania, 666 Desdemona and 2758 Cordelia.

See also


Uranus' natural satellites

edit  (http://footwww.academickids.com/encyclopedia/index.php?title=Template:Uranus_Footer&action=edit)

Cordelia | Ophelia | Bianca | Cressida | Desdemona | Juliet | Portia | Rosalind | S/2003 U 2 | Belinda
S/1986 U 10 | Puck | S/2003 U 1 | Miranda | Ariel | Umbriel | Titania | Oberon | S/2001 U 3
Caliban | Stephano | Trinculo | Sycorax | S/2003 U 3 | Prospero | Setebos | S/2001 U 2


Our Solar System
Sun | Mercury | Venus | Earth (Moon) | Mars | Asteroid belts
Jupiter | Saturn | Uranus | Neptune | Pluto | Kuiper belt | Oort cloud
See also astronomical objects and the solar system's list of objects, sorted by radius or mass
bs:Uranovi prirodni sateliti

ca:Satllit d'Ur zh:天王星的自然卫星

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