Ymir (moon)
Encyclopedia
Ymir or Saturn XIX, is a retrograde
irregular moon of Saturn
. It was discovered by Brett J. Gladman
, et al. in 2000, and given the temporary designation S/2000 S 1. It was named in August 2003, from Norse mythology
, where Ymir
is the ancestor of all the Jotuns or frost giants.
Of the moons that take more than 3 Earth years to orbit Saturn, Ymir is the largest. It is 18 kilometres (11.2 mi) in diameter and takes 3.6 Earth years to complete an orbit around Saturn.
Retrograde and direct motion
Apparent retrograde motion is the motion of a planetary body in a direction opposite to that of other bodies within its system as observed from a particular vantage point...
irregular moon of Saturn
Saturn
Saturn is the sixth planet from the Sun and the second largest planet in the Solar System, after Jupiter. Saturn is named after the Roman god Saturn, equated to the Greek Cronus , the Babylonian Ninurta and the Hindu Shani. Saturn's astronomical symbol represents the Roman god's sickle.Saturn,...
. It was discovered by Brett J. Gladman
Brett J. Gladman
Brett J. Gladman is a Canadian astronomer and a full professor at the University of British Columbia's Department of Physics and Astronomy in Vancouver, British Columbia. He holds the Canada Research Chair in Planetary Astronomy.-Career:...
, et al. in 2000, and given the temporary designation S/2000 S 1. It was named in August 2003, from Norse mythology
Norse mythology
Norse mythology, a subset of Germanic mythology, is the overall term for the myths, legends and beliefs about supernatural beings of Norse pagans. It flourished prior to the Christianization of Scandinavia, during the Early Middle Ages, and passed into Nordic folklore, with some aspects surviving...
, where Ymir
Ymir
In Norse mythology, Ymir, also called Aurgelmir among the giants themselves, was the founder of the race of frost giants and was later killed by the Borrs.-Etymology:...
is the ancestor of all the Jotuns or frost giants.
Of the moons that take more than 3 Earth years to orbit Saturn, Ymir is the largest. It is 18 kilometres (11.2 mi) in diameter and takes 3.6 Earth years to complete an orbit around Saturn.
External links
- MPEC 2000-Y15: S/2000 S 1, S/2000 S 2, S/2000 S 7, S/2000 S 8, S/2000 S 9 (2000 Dec. 19 ephemeris)
- Ephemeris IAU-NSES
- Saturn's Known Satellites (by Scott S. SheppardScott S. SheppardScott S. Sheppard is an astronomer in the Department of Terrestrial Magnetism at the Carnegie Institution for Science. Starting as a graduate student at the Institute for Astronomy at the University of Hawaii, he was credited with the discovery of many small moons of Jupiter, Saturn, Uranus, and...
)