Facts about Dysnomia

1. 09

   The orbital mechanics of Dysnomia allowed astronomers to calculate Eris's mass, confirming it is more massive than Pluto.

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2. 08

   Spectroscopic data suggests Dysnomia's surface temperature reaches approximately minus 230 degrees Celsius, making it colder than most known objects in the outer solar system.

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3. 07

   Dysnomia's discovery in 2005 made it the first moon of a dwarf planet detected beyond Neptune's orbit in our solar system.

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4. 06

   At just 350 kilometers across, Dysnomia is smaller than the distance between New York and Detroit, making it one of the solar system's tiniest known moons.

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5. 05

   Dysnomia's surface composition remains largely unknown, though spectroscopic observations suggest it may contain water ice and darker materials similar to other Kuiper Belt objects.

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6. 04

   With a reflectivity of only 4 percent, Dysnomia ranks among the darkest objects orbiting the sun, absorbing nearly all light that strikes its surface.

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7. 03

   Approximately 700 kilometers in diameter, Dysnomia is significantly smaller than Earth's moon and ranks among the tiniest moons in the solar system.

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8. 02

   Named after the Greek goddess of lawlessness, Dysnomia was discovered in September 2005 by Mike Brown and his team at Caltech.

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9. 01

   Eris's moon Dysnomia orbits its parent dwarf planet every 15.3 hours at a distance of approximately 37,400 kilometers.

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