Table of Contents
When was Eris moon discovered?
January 5, 2005
As Eris orbits the Sun, it completes one rotation every 25.9 hours, making its day length similar to Earth’s. However, other sources disagree on the rotation period. It has one large known moon, Dysnomia….Eris (dwarf planet)
| Discovery | |
|---|---|
| Discovery date | January 5, 2005 |
| Designations | |
| MPC designation | (136199) Eris |
| Pronunciation | /ˈɛrɪs/, /ˈɪərɪs/ |
Why Eris is not a planet?
Eris does not clear out its orbit, so it did not meet one of the requirements. Consequently, it was placed in the newly created category of dwarf planet along with Pluto and Ceres, which also did not meet all of the requirements to be called a planet. Eris has one moon that we currently know about.
How big is Dysnomia compared to Eris?
Dysnomia, is a moon of the dwarf planet Eris. The satellite is about 60 times fainter than Eris, and its diameter is estimated to be approximately eight times smaller.
Is the moon of Eris a planet or dwarf planet?
Eris also has a moon, Dysnomia, which was discovered not long after Eris. Is Eris a planet or a dwarf planet? When Eris was first discovered in 2005, astronomers thought it was significantly larger than Pluto and even considered whether or not Eris could be the 10th planet in our solar system.
When did Eris first appear in the Solar System?
Eris first appeared to be larger than Pluto. This triggered a debate in the scientific community that led to the International Astronomical Union’s decision in 2006 to clarify the definition of a planet. Pluto, Eris and other similar objects are now classified as dwarf planets. Originally designated 2003 UB313…
Is there a spacecraft going to fly by Eris?
While there are no spacecraft expected to fly by Eris in the near future, researchers will get a better look at the dwarf planet after the James Webb Space Telescope launches in 2021.
What is the surface temperature of the Moon Eris?
The presence of methane ice indicates that its surface is very similar to that of Pluto and of Neptune’s largest moon Triton. Its eccentric orbit is also one of the factors that make its surface temperature between about −243.2 and −217.2 °C.