Deimos
Science

Facts about Deimos

We found 13 facts about Deimos

A smaller moon of Mars

Deimos is a smaller and more distant Martian moon. Its diameter is only 12.4 km, although it is difficult to talk about the diameter in the case of such a non-spherical celestial body as this satellite. It does not have many distinctive surface features, but there are a few craters on it. It probably entered the orbit of Mars from the outer Solar System, but there is no confirmed theory of its origin.

Deimos
1
Deimos was discovered by American astronomer Asaph Hall on August 12, 1877, through a telescope at the US Naval Observatory.

It was not discovered accidentally, the astronomer conducted observations precisely to find the planet's natural satellites.

2
The dimensions of Deimos are 15 x 12 x 10.4 km.

Due to its small size, it is not a spherical object.

3
The area of Deimos is only 483,05 square kilometers.
4
The escape velocity from the surface of Deimos is 20 km/h.
5
Deimos is suspected to be a stray asteroid that was directed towards Mars by Jupiter's gravitational field.
6
Deimos orbits Mars in 30 hours, 17 minutes and 55 seconds.

It moves in an almost circular orbit that is systematically expanding. So unlike Phobos, which will most likely fall to the surface of Mars, Deimos will one day escape into space.

7
The surface of Deimos is covered with a few craters.

These craters are less visible than on the other moon because they are filled with regolith (rock dust).

8
The two largest craters of Deimos are approximately 3 kilometers in diameter: Swift and Voltaire.

They were named after two writers who claimed that Mars had two moons before this was proven.

9
The Swift Crater is 1 km in diameter while the Voltaire Crater is 1.9 km in diameter.

They are located close to each other in the northern hemisphere, right near the prime meridian.

10
Unlike Phobos, Deimos rises in the east and sets in the west of the Martian sky.
11
The diameter of Deimos during a solar eclipse on Mars is only 2.5 times greater than the diameter of Venus during transit.
12
The composition of Deimos is very similar to that of C- and D-type asteroids.
13
An eclipse of Deimos by Mars' shadow occurs on average 110 times per Martian year. Such an eclipse can last up to 4 hours.

Due to the short distance at which Deimos orbits Mars, these eclipses are most often total.

Hungry for more facts?

Latest topics

42 facts about Kyshtym disaster
42 facts about Kyshtym disaster
The first nuclear accident in Earth's history
Before information about it saw the light of day, the Soviets hid it for over 30 years. The explosion at the Mayak combine was the first nuclear accid ...
37 facts about Saint Petersburg
37 facts about Saint Petersburg
A city of many names
It was a dream and a matter of prestige for the Romanov dynasty to gain access to the Baltic Sea and build a metropolis to testify to Russia's emergin ...
32 facts about Peter the Great
32 facts about Peter the Great
The first Emperor of all Russia
Peter the Great is considered one of Russia's greatest rulers. He was a great reformer, strategist, and builder who was the first of the tsars to trav ...
39 facts about Dyatlov Pass incident
39 facts about Dyatlov Pass incident
Mysterious tragedy in the Ural mountains
The case of a group of students at the Ural Polytechnical Institute in Sverdlovsk continues to arouse great interest and raise many questions. A group ...
11 facts about Brooklyn Bridge
11 facts about Brooklyn Bridge
The first steel suspension bridge in the world
It is one of the oldest suspension bridges in the world. It connects Brooklyn with Manhattan, runs over the East River, and was completed in 1883. ...
31 facts about Brazil
31 facts about Brazil
South America's largest country
Brazil is the largest and most populous country in South America and one of the largest and most populous countries in the world. A former Portuguese ...
44 facts about Ghent
44 facts about Ghent
City of three towers
Ghent is one of Belgium's most visited cities by tourists. This beautiful old Flanders city combines dignity, beauty, culture, and creativity. It is a ...
31 facts about Thailand
31 facts about Thailand
A country on the Indochinese Peninsula
Thailand is an Asian country located in its south-eastern part, famous for its interesting culture and religious architecture. This exotic country, wh ...

Similar topics