Hades was a purposed planet by Theodor Grigull, in which he predicted that the planet sat beyond the orbit of Neptune and was the reason for the perturbations of many comets.[1] However, no such planet has ever been found.
History[]
Theodor proposed that a trans-neptunian planet, in which he named Hades, and speculated that it sat over 50 AU away from the Sun. He based most of his work on the orbits of comets with aphelions beyond Neptune's orbit, with a cross checking of whether if such celestial body would produce the many observed deviations of Uranus' motion.[2] By 1921, Theodor would later update the orbital period of Hades from 360 years to between 310 to 330 years, mainly to fit later observed deviations.[3]
However, no evidence for Hades has ever been found and its existence is now considered dubious.
Characteristics[]
Theodor suggested that Hades sat over 50 AU away from the Sun, which means that it sits much further from the Sun. This also gives it a year length of 360 years,[4] before it was changed to being between 310 years to 330 years, suggesting that Hades could've had an elliptical orbit.
Theodor suggested that Hades was similar in size to Uranus, likely meaning that it is an ice giant similar to both Uranus or Neptune.[5] Though, the mass of the planet was never proposed.
Trivia[]
- Although while Hades has no relation to the Fifth Giant, the name would be used as one of the Fifth Giant's proposed names if it was ever confirmed to exist.
- The name was originally used for Jupiter IX prior to it receiving its modern name of "Sinope".'
References[]
- ↑ Hypothetical Planets | SolarViews
- ↑ Hypothetical Planets | SolarViews
- ↑ Hypothetical Planets | SolarViews
- ↑ Galaxy Magazine | Page 87
- ↑ Hypothetical Planets | SolarViews