1 day / second
0.5 AU
A large trans-Neptunian dwarf planet slightly more massive than Pluto but smaller in volume, notable for its highly inclined and elongated orbit that takes 557 years to complete.
orbital regime | Kuiper Belt |
learn more | Wikipedia |
mass | 1.6466e+22 kg |
radius | 1,163 km |
hill radius | 0.054 AU |
semi-major axis | 67.864 AU |
eccentricity | 0.436 |
inclination | 44.04º |
longitude of the ascending node | 35.951º |
argument of periapsis | 151.639º |
orbital period | 559.059 years |
surface gravity | 0.083 g |
discovery date | October 21, 2003 |
discovered by | Michael E. Brown, David L. Rabinowitz, and Chadwick Trujillo at Palomar Mountain Observatory |
name origins | Named after Eris, the Greek goddess of strife and discord |
albedo | 0.96 |
material composition | Frozen methane surface |
density | 2.52 g/cm³ |
A large, highly reflective trans-Neptunian object in the Haumea family, orbiting between 35-51 AU from the Sun with an estimated diameter of 286 kilometers.
The first crewed spacecraft to land humans on the Moon launched on July 16, 1969, carrying astronauts Neil Armstrong, Buzz Aldrin, and Michael Collins on their historic mission that culminated in Armstrong and Aldrin's 21-hour lunar surface exploration while Collins orbited above.
A massive yellow dwarf star that contains 99.86% of the Solar System's mass and powers almost all life and weather on Earth through nuclear fusion of hydrogen into helium in its core.
2024-2025
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