New satellite discovered recently
According to the websites descopera and iflyscience, NASA astronomers have announced that they have discovered a new moon in our solar system .
It is a cosmic object found near the dwarf planet Makemake - located in the Kuiper Belt. The announcement strengthens the hypothesis that most of the dwarf planets have moons except Pluto which is a particular situation. The Kuiper Belt extends from the orbit of Neptune to 50 astronomical units away from the Sun. Until the year 2000, it was believed that the belt contained only planet Pluto, the Charon satellite and several comets, but recently other cosmic bodies have been discovered.
These types of satellites - like the one discovered recently near Eris (a dwarf planet) have been discovered in the past.
The Hubble telescope discovered the new satellite
Recently, the Hubble telescope has identified a new satellite in the structure of the Kupier Belt. It was named S / 2015 (136472) and more simply - MK2. Very little information about MK2 has been known until now. It is estimated that MK2 has a diameter of about 160 kilometers and has a brightness of 1,300 times weaker than Makemake. However, its orbit characteristics are still unknown.
Once the orbit has been measured, Makemake's mass will be calculated using the fact that the orbital period depends on the distance between the two cosmic objects and on their mass. Since the Makemake's diameter is already known - about 1500 km - this will show what density the satellite has and therefore what its composition is. Astronomers are eager to know how different it is from Pluto, and not just in terms of size.
Shell of frozen methane.
It is already known the fact that Makemake, like Pluto, has a shell composed of frozen methane, but nobody knows what lies beneath this layer. Pluto is located at a distance of about 39.5 astronomical units from the Sun, while Makemake is positioned at 45.7 astronomical units. The orbit will also be an indicator of the origin of MK2.
Warmer surface temperatures.
Makemake has puzzled astronomers previously because it seemed to have on its surface warmer areas than the ones observed so far in the other smaller planets. However, it seems that these regions were, in fact, the detection of MK2 made in the telescopes which could not clearly distinguish the two objects. This confusion was made because the satellite has a warmer temperature on its surface than the planet around which it orbits.