Days

' MASSES AND GRAVITATIONAL CONSTANTS INCLUDE PLANET PLUS ATMOSPHERE PLUS SATELLITES (i.e.. "EARTH" VALUE IS EARTH PLUS MOONI: ACTUAL MASSES ARE LIMITED 6Y THE KNOWLEDGE OF THE UNIVERSAL GRAVITATIONAL CONSTANT. G (TAKEN AS 6672 X 10~n m3hfl"1 i-2t. THEREFORE. FOR PRECISION WORK. THE PLANETARY GRAVITATIONAL CONSTANT a G X (M ♦ »„,1 SHOULD BE USED. VALUES GIVEN ARE DERIVED FROM THOSE ADOPTED BY THE IAU IMULLER AND SAPPEL, 19771.

2RETROGHADE.

'ROTATION PERIOD - 9.928 HOURS AT HIGH LATITUDES.

'ROTATION PERIOD -10 63 HOURS AT HIGH LATITUDES.

6TITAN. SATURN'S LARGEST SATELLITE. HAS AN ATMOSPHERE WHOSE MAJOR COMPONENT IS CH4.

SRATIO OP TOTAL REFLECTED LIGHT TO TOTAL INCIDENT LIGHT.

\ 11.01 IS THE VISUAL MAGNITUDE WHEN THE OBSERVER IS DIRECTLY BETWEEN THE SUN ANO THE PLANET ANO THE PRODUCT OF THE SUN-PLANET DISTANCE UN AUI ANO OBSERVER-PLANET DISTANCE UN AUl'lSI. SEE SECTION IS FOR FORMULAE FOR OTHER VIEWING ANGLES ANO DISTANCES

8AS VIEWED FROM THE EARTH: MAGNITUDES FOR MERCURY AND VENUS ARE AT GREATEST ELONGATION.

®WITH RINQ SYSTEM VIEWED EDGE'ON.

<0BLUE MAGNITUDE MINUS VISUAL MAGNITUDE. SEE SECTION fl.6.

"FOR SMALL PHASE ANGLES. (. IN DEGREES. THE VARIATION OF VISUAL MAGNITUDE WITH PHASE IS APPROXIMATELY V l|) "V (0) »A,l SEE SECTION IS. FOR SATURN. V DEPENDS STRONGLY ON THE ORIENTATION OF THE RING SYSTEM.

Table L-3. Natural Satellites of the Planets

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