... 3.1. ... 2009; , , 2007; , , 2004; , , 1990; , 2011; , 2010; , 1965]. ... S C 46 4. (4.3), (3.5), (4.1) (4.2) : r = = dr dr d J pe sin J c p2 1e = = = c sin J = 22 2 2p dt d J dt (1 + e cos J) r (1 + e cos J) r µ e sin J, p c µ (1 + e cos J). n = = r p = 2 + 2 = r n µ 1 + 2e cos J+ e 2 . ... p 4. r = 1 + e cos J r. 5. : rx = r (cos в cos u - sin в sin u в cos i ), 3. = ry = r (sin в cos u + cos в sin u в cos i ), rz = r sin u в sin i. 6. : µ µ e cos J , n = (1 + e cos J) . ... Dmax = max D(l) . ...
Atlas . Saturn XV - 1980S28 . Atlas, the second of Saturn's known satellites, orbits near the outer edge of the A-ring and is about 40 by 20 kilometers (25 by 15 miles) in size. It is probably a shepherd satellite for Saturn's A-ring. Atlas was discovered by R. Terrile in 1980 from photographs taken by Voyager during its encounter with Saturn. Atlas Statistics . ... Mean density (gm/cm^3) . ... Rotational period (days) . Orbital period (days) . ... Credit: Calvin J. Hamilton) . ...