Quasi-dwarf planet, Ammonite, discovered

On July 14, 2025, the discovery of Ammonite was published, literally they say that it is a mysterious fossil from deep space that could rewrite the history of the solar system, ammonite is due to an ancient species of cephalopod mollusks that became extinct when the dinosaurs also became extinct 66 million years ago, you know, the avian dinosaurs.

This is going to be a good year or it seems like it is going to be a good year for the exploration of the outer reaches of the solar system. In May, the discovery of a candidate for Dwarf Planet 2017 OF21 of at least 700 km in diameter was presented. Ammonite, which receives the term or name of 2023 KQ14 is a distant object in the solar system, is classified as a sednoid, ethmoids are a rare class of trans-Neptunian objects with extremely elongated orbits that keep them very far from the sun.

Sednoid is because they are associated with the dwarf planet Sedna, which is about 995 km in diameter. Ammonite is much smaller. It is estimated that its diameter is between 220 and 380 km in diameter, a respectable size, but I don't think it will be able to reach the dwarf planet. the height of Mount Everest.

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Its discovery was made with the Subaru telescope and was confirmed by a lot of orbital data, the basic issue of this object is that it challenges the theory about the existence of planet number nine, because the orbit it has would not fit with the existence of that planet number nine, unless that planet number nine was even further away than is believed.

What is this about planet number nine? It is a paneta, with varying estimates of its size, but much larger than the Earth, with a mass between 10 to 15 times the Earth's mass, it depends on which version and also depends on how far away it was.

That planet would have originally formed along with the rest of the planets in the solar system, in the area where the planets of the solar system are, but during the first million years of formation of the solar system with so much chaos, so many planets, because there were many more planets at that time, many more, for example, the Earth crashed into one the size of Mars, it is believed that Jupiter swallowed one at least the size of Uranus and Uranus is believed to have swallowed another, that is why it is lying the size of the Land.

There were many planets, many ended up colliding with others, Jupiter I suppose would eat most of them and some would end up against the Sun and others would end up ejected, planet number nine expelled to an orbit far from the Sun, but with its mass it would have altered the orbit of other trans-Neptunian objects, that is the theory that would explain those alterations in the orbits of trans-Neptunian objects that we are currently discovering, however, this ammonite object that has been discovered now has an orbit that does not would fit into that alteration, which would not fit into that explanation.

So if there is that planet that these researchers do not rule out, what they say is that if it exists it should be further away than current theory predicts, which would complicate its discovery quite a bit. They also call it a fossil because according to the simulations they have done, this object has had a stable orbit for 4.5 billion years, which is also quite amazing because remembering that it is being discovered that stars have passed near us over time near the solar system, some have even gotten inside what is the Oort cloud, which would be the outer part of the system.

Source

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