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  2. Orbital period - Wikipedia

    en.wikipedia.org/wiki/Orbital_period

    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]

  3. Neptune - Wikipedia

    en.wikipedia.org/wiki/Neptune

    There do exist orbits within these empty regions where objects can survive for the age of the Solar System. These resonances occur when Neptune's orbital period is a precise fraction of that of the object, such as 1:2, or 3:4. If, say, an object orbits the Sun once for every two Neptune orbits, it will only complete half an orbit by the time ...

  4. Outline of Neptune - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Neptune

    Neptune is 17 times the mass of Earth and is slightly more massive than its near-twin Uranus, which is 15 times the mass of Earth and slightly larger than Neptune. [ a ] Neptune orbits the Sun once every 164.8 years at an average distance of 30.1 astronomical units (4.50 × 10 9 km).

  5. Dermott's law - Wikipedia

    en.wikipedia.org/wiki/Dermott's_law

    Where T(n) is the orbital period of the n th satellite, T(0) is of the order of days and C is a constant of the satellite system in question. Specific values are: Specific values are: Jovian system : T (0) = 0.444 d , C = 2.03

  6. Orbit equation - Wikipedia

    en.wikipedia.org/wiki/Orbit_equation

    In astrodynamics, an orbit equation defines the path of orbiting body around central body relative to , without specifying position as a function of time.Under standard assumptions, a body moving under the influence of a force, directed to a central body, with a magnitude inversely proportional to the square of the distance (such as gravity), has an orbit that is a conic section (i.e. circular ...

  7. (126154) 2001 YH140 - Wikipedia

    en.wikipedia.org/wiki/(126154)_2001_YH140

    2001 YH 140 is locked in 3:5 mean-motion resonance with Neptune. [4] When it makes three revolutions around the Sun, Neptune makes exactly five. The rotation period of (126154) 2001 YH 140 is estimated to be 13.25 ± 0.2 hours .

  8. Resonant trans-Neptunian object - Wikipedia

    en.wikipedia.org/wiki/Resonant_trans-Neptunian...

    In astronomy, a resonant trans-Neptunian object is a trans-Neptunian object (TNO) in mean-motion orbital resonance with Neptune.The orbital periods of the resonant objects are in a simple integer relations with the period of Neptune, e.g. 1:2, 2:3, etc. Resonant TNOs can be either part of the main Kuiper belt population, or the more distant scattered disc population.

  9. Rotation period (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Rotation_period_(astronomy)

    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 ).