+——————————————+————————————————————+————————+——————+ | | Mean Distance. | | | | +————————————————————+Sidereal| Real | |No. and Name. |Diameters | |Period. | Diam.| | |of Saturn.| Miles. | | | +——————————————+————————————————————+————————+——————+ | | | | d h m|miles.| |7th. Mimas | 1·53 | 115,000| 0 22 37| 1000 | |6th. Enceladus| 1·97 | 148,000| 1 8 53| ... | |5th. Tethys | 2·44 | 183,000| 1 21 18| 500 | |4th. Dione | 3·12 | 234,000| 2 17 41| 500 | |3rd. Rhea | 4·36 | 327,000| 4 12 25| 1200 | |1st. Titan | 10·12 | 759,000|15 22 41| 3300 | |8th. Hyperion | 12·23 | 917,000|21 7 7| ... | |2nd. Iapetus | 29·61 |2,221,000|79 7 53| 1800 | +——————————————+————————————————————+————————+——————+ +——————————————+——————————————-+———————————————-+ | | | | | | Date of | | |No. and Name. | Discovery. | Discoverer. | | | | | +——————————————+——————————————-+———————————————-+ | | | | |7th. Mimas |1789, Sept. 17.|W. Herschel. | |6th. Enceladus|1789, Aug. 28.|W. Herschel[40].| |5th. Tethys |1684, Mar. 21.|J. D. Cassini. | |4th. Dione |1684, Mar. 21.|J. D. Cassini. | |3rd. Rhea |1672, Dec. 23.|J. D. Cassini. | |1st. Titan |1655, Mar. 25.|C. Huygens. | |8th. Hyperion |1848, Sept. 19.|Bond & Lassell. | |2nd. Iapetus |1671, Oct. 25.|J. D. Cassini. | +——————————————+——————————————-+———————————————-+ The numbers in the first column refer to the order of discovery. [Illustration: Fig. 41. Apparent Orbits of the Five Inner Satellites of Saturn, as seen in an Inverting Telescope. (The arrows in the diagram show the direction of the motion of the satellites. The figures indicate the interval, in hours, from the time of last East elongation.)]