Vishnu was one of two hypothetical planets proposed by Venkatesh P. Ketakar, who believed that two planets sat beyond the orbit of Neptune.[1] However, no evidence for Vishnu was found, and the planet may not actually exist.
History[]
Much like its twin planet, Brahma, Vishnu was thought to be sitting beyond Neptune, due the orbits of many periodic comets being perturbed, which is thought to be the results of two trans-neptunian planets residing beyond Neptune. Similar to what Ketakar did with Brahma, he also predicted the orbital parameters of Vishnu and proposed its possible position within the Solar system at the time.[2]
Given that not much else is known about Vishnu, as a result of it being overlooked compared to Brahma, it can be assumed that it has been considered disproven.
Characteristics[]
Much like Brahma, Ketakar predicted and calculated the orbital distance and period of Vishnu, proposing it to be over 59.573 AU's away from the Sun, and taking over 458.27 years to circle it.[3]
Similarly, it's unclear as to what planet type is Vishnu supposed to be. But given that its also thought to been the reasons why most comet's were perturbed, it can be assumed that it is a gaseous planet. Though, given that this can also work with terrestrial planets, it could be either planet types.
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