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Vanth (moon)
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Moon of Orcus
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Wikipedia

Vanth (formal designation (90482) Orcus I) is the only known moon of the large trans-Neptunian dwarf planet Orcus. It was discovered by Michael Brown and Terry-Ann Suer using images taken by the Hubble Space Telescope on 13 November 2005. The moon has a diameter of 443 km (275 mi), making it about half the size of Orcus and the third-largest...

Apparent mag. 21.8
Absolute mag. 4.88
Mass 87
Orbital period 9.539154 days
Discovered 2005
Discoverer / Inventor
Michael E. Brown
References
Wikidata