346
SYNOPTICAL TABLES.
| Greatest number of belts observed, | 40 |
| Number of permanent belts, | 2 |
| Time Cassini's spot was seen at intervals, in years, | 43 |
| Proper motion in longitude, for one revolution, of some spots, | 3° |
| Velocity of the wind from slower moving spots, feet in a second, | 350 |
| Velocity of wind in greatest hurricane on the earth, feet in a second, | 50 |
| Distance, east and west, of centre of disc beyond which spots are not usually visible, | 1h. 27m. |
| Proportion of brightness at poles to that of the equator, | 1-2d |
| Distance from the Sun, mean, in miles, (Earth's = 1), | 494,256,000 |
| Distance from the Sun, maximum | 5.202767 |
| Distance from the Sun, minimum, | 5.453663 |
| Eccentricity of orbit (semi-axis major = 1), | 4.951871 |
| Eccentricity of orbit annual increase. | .0482235 |
| Longitude of perihelion, | .000001593 |
| Longitude of perihelion, annual increase. | 11° 8′ 35″ |
| Longitude of perihelion, ascending node, | 6″.96 |
| Longitude of perihelion, annual decrease. | 98° 26′ 19″ |
| Longitude of perihelion,|annual decrease, | 34″.3 |
| Inclination of orbit to ecliptic, | 1° 18′ 51″ |
| Inclination of orbit to ecliptic, annual decrease, | 0″-226 |
| Motion, mean daily, | 4′ 59″ |
| Motion, in 365 days, | 30° 20′ 32″ |
| Inclination of axis to ecliptic. | 3° 5′ 30″ |
| Mean arc of retrogradation. | 9° 54′ |
| Revolution, sidereal, in mean solar days, | 4332.584821 |
| Revolution, synodical, | 398.867 |
