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In astronomy, the rotation period or spin period [1] of a celestial object (e.g., star, planet, moon, asteroid) has two definitions. The first one corresponds to the sidereal rotation period (or sidereal day), i.e., the time that the object takes to complete a full rotation around its axis relative to the background stars (inertial space).
While approaching Saturn in 2004, Cassini found that the radio rotation period of Saturn had increased appreciably, to approximately 10 h 45 m 45 s ± 36 s. [ 91 ] [ 92 ] An estimate of Saturn's rotation (as an indicated rotation rate for Saturn as a whole) based on a compilation of various measurements from the Cassini , Voyager , and Pioneer ...
A synodic day (or synodic rotation period or solar day) is the period for a celestial object to rotate once in relation to the star it is orbiting, and is the basis of solar time. The synodic day is distinguished from the sidereal day , which is one complete rotation in relation to distant stars [ 1 ] and is the basis of sidereal time.
These medium wave emissions were modulated with a period of about 10 h 30 min, which was interpreted as Saturn's rotation period. [10] Nevertheless, the evidence available in the 1970s was too inconclusive and some scientists thought that Saturn might lack a magnetic field altogether, while others even speculated that the planet could lie ...
You just pick a landmark and wait for it to reach the exact same point twice in its rotation and you have your answer. ... astronomers using magnetic field data from Voyager estimated a Saturn day ...
For example, Jupiter has a synodic period of 398.8 days from Earth; thus, Jupiter's opposition occurs once roughly every 13 months. If the orbital periods of the two bodies around the third are called T 1 and T 2 , so that T 1 < T 2 , their synodic period is given by: [ 7 ]
But one day, Saturn’s rings really will disappear. Observations from NASA’s Voyager 2 mission in 1981 allowed the U.S. space agency to release research in 2018 finding that the iconic rings ...
A day is the time period of a full rotation of the Earth with respect to the Sun. On average, this is 24 hours ... Saturn: 10.7 Uranus: 17.2 Neptune: 16.1 Pluto: 153.3