Hyperion, god of light and sunlight
Hyperion was a Titan god of light or sunlight and was associated with watching and observation from above. He was also known as a Pillar of east. Together with his other three brothers, Crius, Coeus and Iapetus, they presided as the Pillars holding Heaven and Earth apart. He was one of six sons of Uranus and Gaea and is mentioned by Apollodorus as one of the five brothers, all but Oceanus, who participated in rebellion against Uranus and later attacked him. When they overcame him, the four brothers probably held him down while Cronus castrated him.
While most authors are identifying Hyperion as a unique character, Homer was equating Helios and Hyperion as one and the same character and it can be seen in both of his epics, the Iliad and the Odyssey.
Myths of Hyperion, the rhythm of days, family and titanomachy
The following grouped sections are available:
Establishing a rhythm of days and months
Due to his diligent observation, he was first to understand the movements of the sun and the moon, as well as the other stars and seasons. He was believed to have organized the cycles of the sun, the moon and the dawn. During his time, he married Theia with whom he had three children who presided over these cycles. Helios presided over the sun, Selene over the moon and Eos presided over the dawn, further empowering the role of their father.
Titanomachy
Although there are notes of Hyperion participating in Titanomachy, there is no reference to his role in the war. It is only known that he sided with his brothers and fellow Titans against younger Olympians. And that he was in the end, after losing the war, imprisoned in Tartarus with his brothers and relatives. However, according to Aeschylus' lost play, he was later released by Zeus from Tartarus with the rest of the titans.
Sources
To learn more, you may explore the sources and notes about Hyperion yourself