Thrymr
Encyclopedia
Thrymr or Saturn XXX, is a natural satellite
of Saturn
. It was discovered by Gladman
, et al. in 2000, and given the temporary designation S/2000 S 7. Its name comes from Norse mythology
, where Thrymr
is a Jotun or frost giant.
Thrymr is about 5.6 km (3.5 mi) in diameter, and orbits Saturn at an average distance of 20,810 Mm in 1120.809 days. It may have formed from debris knocked off of Phoebe
. The Thrymian orbit is retrograde
, at an inclination
of 175° to the ecliptic
(151° to Saturn's equator) and with an eccentricity of 0.453.
Its name was announced as Thrym in IAU Circular 8177. However, the IAU
Working Group on Planetary System Nomenclature later decided to add the nominative case
ending -r to the root Thrym.
Natural satellite
A natural satellite or moon is a celestial body that orbits a planet or smaller body, which is called its primary. The two terms are used synonymously for non-artificial satellites of planets, of dwarf planets, and of minor planets....
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 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 7. Its name comes 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 Thrymr
Thrymr
Thrymr or Saturn XXX, is a natural satellite of Saturn. It was discovered by Gladman, et al. in 2000, and given the temporary designation S/2000 S 7. Its name comes from Norse mythology, where Thrymr is a Jotun or frost giant....
is a Jotun or frost giant.
Thrymr is about 5.6 km (3.5 mi) in diameter, and orbits Saturn at an average distance of 20,810 Mm in 1120.809 days. It may have formed from debris knocked off of Phoebe
Phoebe (moon)
Phoebe is an irregular satellite of Saturn. It was discovered by William Henry Pickering on 17 March 1899 from photographic plates that had been taken starting on 16 August 1898 at the Boyden Observatory near Arequipa, Peru, by DeLisle Stewart...
. The Thrymian orbit is retrograde
Retrograde motion
Retrograde motion is motion in the direction opposite to the movement of something else, and is the contrary of direct or prograde motion. This motion can be the orbit of one body about another body or about some other point, or the rotation of a single body about its axis, or other phenomena such...
, at an inclination
Inclination
Inclination in general is the angle between a reference plane and another plane or axis of direction.-Orbits:The inclination is one of the six orbital parameters describing the shape and orientation of a celestial orbit...
of 175° to the ecliptic
Ecliptic
The ecliptic is the plane of the earth's orbit around the sun. In more accurate terms, it is the intersection of the celestial sphere with the ecliptic plane, which is the geometric plane containing the mean orbit of the Earth around the Sun...
(151° to Saturn's equator) and with an eccentricity of 0.453.
Its name was announced as Thrym in IAU Circular 8177. However, the IAU
International Astronomical Union
The International Astronomical Union IAU is a collection of professional astronomers, at the Ph.D. level and beyond, active in professional research and education in astronomy...
Working Group on Planetary System Nomenclature later decided to add the nominative case
Nominative case
The nominative case is one of the grammatical cases of a noun or other part of speech, which generally marks the subject of a verb or the predicate noun or predicate adjective, as opposed to its object or other verb arguments...
ending -r to the root Thrym.