![hades symbols hades symbols](https://i.pinimg.com/236x/89/57/d7/8957d7b8d523f6ba98903175138715b4.jpg)
Long rotation periods mean it rotates slowly. It takes 54.90 days or nearly eight weeks to complete one spin, similar to the rotation of Mercury (58.65 days). Hades is locked into a 12:7 tide ratio, meaning one complete rotation is seven twelves of its orbital period. As seen from Earth, Hades maximum apparent separation from the parent star is about one-tenth of an arcsecond, which is very wide for the semimajor axis because the planet and the star is so near to us. Hades moves faster when it is closer to the star and slower when it is farther away.
![hades symbols hades symbols](https://i.pinimg.com/originals/a4/f7/55/a4f7558aad5286dca1593971ddca945c.jpg)
Hades moves at an average speed of 43.25 km/s, 45% faster than the orbital speed of Earth. The length of planet's year is 94.1 days, which is just over three months and one quarter of a year on Earth. Hades orbits at a semimajor axis of 55.84 gigameters and distance varies by 15% throughout its orbit. Hades orbits in the similar distance from the star as Mercury is from the Sun, thus the length of its year is similar to Mercury as well. It is also the 32nd planet discovered in Cetus and 100th in Hippocampus. Hades became the 840th exoplanet discovered since 1992 and is the 159th planet discovered in 2012. It was successfully done using high resolution HARPS spectrograph mounted on the 3.6-meter telescope in La Silla Observatory located in the Atacama Desert in Chile. This discovery was made by carefully watching the wobble of Tau Ceti caused by gravitational tug of planets. Hades was discovered on December 19, 2012, together with four other planets in this system.
![hades symbols hades symbols](https://i.pinimg.com/originals/43/49/2b/43492b04030ce3e7413363354efa7071.jpg)
It is also a desert planet with a year lasting 94 days. This planet is a super-Earth which orbits in a Mercury-like distance from the parent star. It is one of the five planets discovered on December 19, 2012. Hades ( Tau Ceti d, P848) is the third exoplanet in orbit around Tau Ceti, a star just 12 light-years away.