description Hippocampus Overview
Hippocampus, meaning sea horse, was a proposed constellation published by the English naturalist John Hill in his 1754 astronomical work Urania. Hill placed it in the region between Eridanus, Taurus, and Cetus and used it to fill a previously unassigned area of the sky. The figure was not adopted into the standard constellation system and is now treated as a former or obsolete constellation, so the name does not identify an official modern constellation.
help Hippocampus FAQ
What was the proposed constellation Hippocampus?
Hippocampus was a proposed constellation named after the seahorse. English naturalist John Hill published it in 1754 in his work Urania.
Where did John Hill place Hippocampus?
Hill placed Hippocampus between Eridanus, Taurus, and Cetus. He used it to fill an area of the sky that he considered insufficiently assigned.
Is Hippocampus an official constellation today?
No. Hippocampus was not retained as one of the 88 constellations recognized by the International Astronomical Union. It survives mainly as a historical example of a proposed constellation.
Why do historical constellation maps include Hippocampus?
Early star atlases often proposed new figures to fill gaps or reorganize the sky. Hippocampus appears in that history because Hill published a specific placement and figure in the eighteenth century.
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