# What would a Haumea-shaped Moon look like from Earth?

Basically what it says on the tin, I'm writing a fantasy world and I'm testing some exotic types of moons for this one. Then I came across Haumea, a dwarf planet located beyond Neptune.

Quoting Wikipedia:

This is faster than any other known equilibrium body in the Solar System, and in fact faster than any other known body over 100 km in diameter. [40] While most rotating bodies in equilibrium flatten into oblate spheroids, Haumea rotates so rapidly that it distorts into a triaxial ellipsoid. If Haumea spun much faster, it would distort into a dumbbell shape and split in two. [22] This rapid rotation is believed to have been caused by the impact that created its satellites and its family of collisions. [35]

Haumea is a triaxial ellipsoid, which means that all cross sections are ellipses and not circles. So hypothetically speaking, if a planet like earth had a moon shaped like Haumea, what would it look like from the planet? (Obviously this moon will have a similar rotation to that of Haumea to keep its shape.)

Ignore the moons and the ring around Haumea, I mean only its shape

• Haumea is fast rotating, Moon is tidally locked. Do you want to handwave tidal locking? Jul 16, 2021 at 22:35
– Xare
Jul 16, 2021 at 22:38
• Well, it would look just like what you described - a triaxial ellipsoid, just as in the image. Jul 17, 2021 at 16:51
• A minor problem is that we scientifically can't have fast rotating icy body in place of our Moon. A sufficiently advanced civilization may be able to place it there, but it won't stay in its initial state for long. Jul 17, 2021 at 18:47
• @Alexander maybe if you put the new moon on a canted orbit around Earth then place a solar shade on a halo orbit at L1, could keep it cool enough. You could also give the orbit a precession of 1 year such that the shadow of the new moon (and the shadow of the shade) never fall on Earth.
– BMF
Jul 17, 2021 at 19:25

## Its apparent size and brightness in the sky would fluctuate a couple to a few times every night.

GIF is (...still?) broken, will try to fix later