Umbriel is Uranus's moon.
Umbriel - moon - was created on 1851-10-24.
Ariel was discovered in 1951 & Same with Umbriel
Ariel and Umbriel were discovered by William Lassell in October 1851.
There is no god or goddess I am aware of called "umbriel". It's a character in a book.
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William Lassell discovered the moons Ariel and Umbriel orbiting Uranus in 1851.
William Lassel in 1851
The temperature on the moon Umbriel, which is a moon of Uranus, is estimated to be around -213 degrees Celsius (-352 degrees Fahrenheit) on its surface. This extremely cold temperature is due to its distance from the Sun and its lack of atmosphere to trap heat.
William Lassell in 1851
Miranda, Ariel, Umbriel, Titania and Oberon.
He named Titania, Oberon, Ariel, and Umbriel.
1851 by William Lassell (Ariel and Umbriel) and in 1948 by Gerard Kuiper (Miranda)Titania and Oberon were discovered in 1787by William Herschel.