Discovered by William Herschel in 1781

Average Distance from the Sun

Metric: 2,870,972,200 km

English: 1,783,939,400 miles

Perihelion (closest)

Metric: 2,735,560,000 km

English: 1,699,800,000 miles

Aphelion (farthest)

Metric: 3,006,390,000 km

English: 1,868,080,000 miles

Equatorial Radius

Metric: 25,559 km

English: 15,882 miles

Equatorial Circumference

Metric: 160,592 km

English: 99,787 miles

Volume

Metric: 69,142,000,000,000 km3

Mass

Metric: 86,849,000,000,000,000,000,000,000 kg

Density

Metric: 1.30 g/cm3

Surface Area

Metric: 8,115,600,000 km2

English: 3,133,400,000 square miles

Equatorial Surface Gravity

Metric: 8.43 m/s2

English: 27.7 ft/s2

Escape Velocity

Metric: 76,640 km/h

English: 47,620 mph

Sidereal Rotation Period (Length of Day)

-0.7196 Earth days (retrograde)

-17.24 hours (retrograde)

Sidereal Orbit Period (Length of Year)

84.02 Earth years

30,687.2 Earth days

Mean Orbit Velocity

Metric: 24,607 km/h

English: 15,290 mph

Orbital Eccentricity

.047168

Orbital Inclination to Ecliptic

0.770 degrees

Equatorial Inclination to Orbit

97.86 degrees

Orbital Circumference

Metric: 17,620,000,000 km

Effective Temperature

Metric: -216 °C

English: -357 °F

Atmospheric Constituents

Hydrogen 83%

Helium 15%

Methane 2%

Moons:

1. Cordelia

2. Ophelia

3. Bianca

4. Cressida

5. Desdemona

6. Juliet

7. Portia

8. Rosalind

9. S/2003 U2

10. Belinda

11. 1986 U10

12. Puck

13. S/2003 U1

14. Miranda

15. S/2001 U3

16. Ariel

17. Umbriel

18. Titania

19. Oberon

20. Caliban

21. Stephano

22. Trinculo

23. Sycorax

24. S/2003 U3

25. Prospero

26. Setebos

27. S/2001 U2