it:Rea (astronomia) [1], Rhea is named after the Titan Rhea of Greek mythology, the "mother of the gods" and wife of Kronos, the Greek counterpart of the god Saturn. 6 How much would Rhea's gravity pull on me?

7 Who is it named after? Although numerically, Rhea was called Saturn V, the moons were renamed in 1847 by John Herschel, the son of famed astronomer William Herschel, so that they were the relatives of the mythological Greek god Cronus (whom the Romans called Saturn.)

Its volume is 1870166133. tr:Rhea (uydu) Calculated on the basis of other parameters. (1984) "The Geomorphology of Rhea", "The Gravity Field of the Saturnian System from Satellite Observations and Spacecraft Tracking Data", "DPS 2015: First reconnaissance of Ceres by Dawn", "Planet and Satellite Names and Discoverers", Monthly Notices of the Royal Astronomical Society, Vol. The figure comes from N.A.S.A.. Its density has been calculated at being 1.233. The acceleration due to gravity on Rhea is g 2 = 0.264 m/s 2 . Its mass is estimated/calculated at being 2,307,089,151,289,080,000,000 kg. All messages will be reviewed before being displayed. It is also designated Saturn V. Cassini named the four moons he discovered (Tethys, Dione, Rhea and Iapetus) Sidera Lodoicea (the stars of Louis) to honor King Louis XIV. Astronomers fell into the habit of referring to them and Titan as Saturn I through Saturn V. Once Mimas and Enceladus were discovered, in 1789, the numbering scheme was extended to Saturn VII. The January 17, 2006 distant flyby by the Cassini spacecraft yielded images of the wispy hemisphere at better resolution and a lower Sun angle than previous observations. nn:Saturnmånen Rhea The Escape Velocity is the speed an object needs to be travelling in order to break free from the objects gravity. [b], Before the Cassini-Huygens mission, it was assumed that Rhea had a rocky core. Not to be confused with the asteroid named. he:ריאה (ירח) [c][17] Such a value indicated that Rhea had an almost homogeneous interior (with some compression of ice in the center) while the existence of a rocky core would imply a moment of inertia of about 0.34. However, a proposed model for the formation of Titan may also shine a new light on the origin of Rhea and Iapetus. Rhea’s density of 1.236 g/cm3 indicates that it is primarily composed of water ice constituting about 75 percent and rocky material makes up for the balance 25 percent. Rhea, or Saturn V, is the second largest moon of Saturn (and the largest moon without an atmosphere) and the ninth most massive moon in all the solar system.Recent evidence from the Cassini-Huygens Mission indicates that Rhea, unique among natural satellites, might have a ring system.

[37] Rhea has been also imaged many times from long to moderate distances by the orbiter. This low density indicates that it is made of ~25% rock (density ~3.25 g/cm ) and ~75% water ice (density ~0.93 g/cm ). [25] On the trailing hemisphere there is a network of bright swaths on a dark background and few visible craters. [28][29], On March 6, 2008, NASA announced that Rhea may have a tenuous ring system. ro:Rhea (satelit)scn:Rea Images from this and subsequent flybys showed that Rhea's streaks in fact are tectonically formed ice cliffs (chasmata) similar to those of Dione. [11][12] It was discovered in 1672 by Giovanni Domenico Cassini. The Escape Velocity of the object is 2,285 km/h. This would mark the first discovery of rings around a moon. [30][31][32] Dust and debris could extend out to Rhea's Hill sphere, but were thought to be denser nearer the moon, with three narrow rings of higher density. The equatorial circumference of Rhea is 4802.2 km. [16] However, measurements taken during a close flyby by the Cassini orbiter in 2005 cast this into doubt. la:Rhea (satelles) The moons of Saturn are thought to have formed through co-accretion, a similar process to that believed to have formed the planets in the Solar System. simple:Rhea (moon)

[23] This crater, called Inktomi, is nicknamed "The Splat", and may be one of the youngest craters on the inner moons of Saturn. The is the average distance in km of the object is from its parent 527068.00. In this model, Titan was formed in a series of giant impacts between pre-existing moons, and Rhea and Iapetus are thought to have formed from part of the debris of these collisions. Cassini color image of Rhea - large crater Powehiwehi (right center) - chasmata stretch vertically above (past crater Wakonda, near the terminator) - Onokoro Catenae (lower left). Give your answer as a multiple of y 1 . [20] Models suggest that Rhea could be capable of sustaining an internal liquid-water ocean through heating by radioactive decay.[21]. lit) [23] No evidence of any endogenic activity has been discovered. Comments may be merged or altered slightly such as if an email address is given in the main body of the comment. Image of the wispy hemisphere, showing ice cliffs - Powehiwehi (upper center); chasmata stretch from upper left to right center - Onokoro Catenae (lower right). It is the second smallest body in the Solar System for which precise measurements have confirmed a shape consistent with hydrostatic equilibrium, after dwarf planet Ceres. There's no register feature and no need to give an email address if you don't need to.

3, pp. The surface gravity of the said item is 0.264. It consists of oxygen and carbon dioxide in proportion of roughly 5 to 2. sv:Rhea (måne)
Rhea is 1530 km in diameter (the distance from one side to the other through the center). In a paper published in 2007 it was claimed that the axial dimensionless moment of inertia coefficient was 0.4. zh-classical:土衛五, Higher-resolution image of the wispy hemisphere, showing ice cliffs, The moons more massive than Rhea are: Earth's Moon, the four, Articles containing Ancient Greek language text, Monthly Notices of the Royal Astronomical Society, Vol. [33] However, when Cassini made targeted observations of the putative ring plane from several angles, no evidence of ring material was found, suggesting that another explanation for the earlier observations is needed.[34][35]. [citation needed] The extensive dark areas are thought to be deposited tholins, which are a mix of complex organic compounds generated on the ice by pyrolysis and radiolysis of simple compounds containing carbon, nitrogen and hydrogen.[26]. Rhea's features resemble those of Dione, with dissimilar leading and trailing hemispheres, suggesting similar composition and histories. [19] In 2008 an author of the first paper tried to reconcile these three disparate results. The Equatorial Radius of the object is 764km. How big is Rhea? The Mean orbit velocity, that is the speed at which it orbits is 30541.40 km/h. sk:Rhea (mesiac)

fa:رئا (ماه)gl:Rea (lúa)hr:Reja (mjesec) [16] In the same year another paper claimed the moment of inertia was about 0.37. You can decline to give a name which if that is the case, the comment will be attributed to a random star. The surface area of Rhea is 7,340,701.82. Rhea (/ˈriːə/) is the second-largest moon of Saturn and the ninth-largest moon in the Solar System. Whereas some of them argued that the moment of inertia reading suggested a rocky core, others have pointed out to a ho… Rhea has an icy body and was initially assumed to have a core made of rocks. View of Rhea's leading hemisphere with crater Inktomi and its prominent ray system just below center; impact basin Tirawa is at upper left, Enhanced-color views of Rhea taken by Cassini on 9 February 2015. 42–43, Physics of the Earth and Planetary Interiors, "Shapes of the saturnian icy satellites and their significance", "Subsurface oceans and deep interiors of medium-sized outer planet satellites and large trans-neptunian objects", "Large impact features on middle-sized icy satellites", "Rhea - Overview | Planets - NASA Solar System Exploration", A spectroscopic study of the surfaces of Saturn's large satellites: H2O ice, tholins, and minor constituents, "Giant impact scenario may explain the unusual moons of Saturn", "Cassini Finds Ethereal Atmosphere at Rhea", "The Dust Halo of Saturn's Largest Icy Moon, Rhea", "Another possible piece of evidence for a Rhea ring", "Cassini Solstice Mission: Cassini Rocks Rhea Rendezvous", "NASA craft snaps last close-up photos of icy Saturn moon", Images of Rhea at JPL's Planetary Photojournal, https://en.wikipedia.org/w/index.php?title=Rhea_(moon)&oldid=965888341, Articles with unsourced statements from February 2013, Creative Commons Attribution-ShareAlike License, This page was last edited on 4 July 2020, at 00:57. 3, pp. The orbital eccentricity is 0.001, it is the degree at which Rhea orbits close to a circular (0) orbit as opposed to an elliptical (1) orbit. There were five close targeted fly-bys by the Cassini orbiter: at a distance of 500 km on November 26, 2005, at a distance of 5,750 km on August 30, 2007, at a distance of 100 km on March 2, 2010 and at 69 km flyby on January 11, 2011[36] and a last flyby at 992 km on March 9, 2013.
Rhea is relatively large when compared with the moons of other planets in … [24] Rhea has two very large impact basins on its anti-Cronian hemisphere (facing away from Saturn), which are about 400 and 500 km across. sl:Rea (luna) The rings' existence was inferred by observed changes in the flow of electrons trapped by Saturn's magnetic field as Cassini passed by Rhea. pl:Rea (księżyc) Although Rhea is the ninth-largest moon, it is only the tenth-most-massive moon. The orbital inclination, the angle at which Rhea orbits in relation to the orbital plane is 0.35 degrees.

co:Rea [13][14], Cassini named the four moons he discovered (Tethys, Dione, Rhea, and Iapetus) Sidera Lodoicea (the stars of Louis) to honor King Louis XIV. This low density indicates that it is made of ~25% rock (density ~3.25 g/cm3) and ~75% water ice (density ~0.93 g/cm3). nl:Rhea (maan)no:Rhea (måne) sh:Reja (mjesec) cy:Rhea (lloeren) It is its second-largest moon and consists mosty of ice and rock.

Rhea is named after the Titan Rhea of Greek mythology, "mother of the gods". the period it takes to complete an orbit round Saturn is 4.5175 days. pt:Reia (satélite) Although Rhea is the ninth-largest moon, it is only the tenth-most-massive moon. The surface gravity of the said item is 0.264. fi:Rhea (kuu) It was discovered in the year 1672 by G.D. Cassini. [23] The more northerly and less degraded of the two, called Tirawa, is roughly comparable to the basin Odysseus on Tethys. uk:Рея (супутник) da:Rhea (måne)el:Ρέα (δορυφόρος)eo:Reo (luno) The orbital period, i.e. The case for a ring was strengthened by the subsequent finding of the presence of a set of small ultraviolet-bright spots distributed along Rhea's equator (interpreted as the impact points of deorbiting ring material). [1] Astronomers fell into the habit of referring to them and Titan as Saturn I through Saturn V.[1] Once Mimas and Enceladus were discovered, in 1789, the numbering scheme was extended to Saturn VII, and then to Saturn VIII with the discovery of Hyperion in 1848. [15][1], Rhea is an icy body with a density of about 1.236 g/cm3. Rhea was discovered by Giovanni Domenico Cassini on 23 December 1672. Solar System Dynamics. At highest resolution, several long linear features are visible: halfway down from center is Harahvaiti Fossa, while near the limb left of the bottom is Koykamou Catena. Though it is ninth largest in size, it holds the tenth position in terms of mass.