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  2. Saturn Sky - Wikipedia

    en.wikipedia.org/wiki/Saturn_Sky

    The actual Sky would draw far more inspiration from the Saturn Curve concept of 2004 and the Pontiac Solstice concept of 2002. The Saturn Curve featured linework that would eventually make its way onto the body of the Saturn Sky. The Saturn Sky would, upon release, differ greatly from the initial concept.

  3. Phase curve (astronomy) - Wikipedia

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

    In astronomy, a phase curve describes the brightness of a reflecting body as a function of its phase angle (the arc subtended by the observer and the Sun as measured at the body). The brightness usually refers the object's absolute magnitude , which, in turn, is its apparent magnitude at a distance of one astronomical unit from the Earth and Sun.

  4. Kepler's laws of planetary motion - Wikipedia

    en.wikipedia.org/wiki/Kepler's_laws_of_planetary...

    Mathematically, an ellipse can be represented by the formula: r = p 1 + ε cos ⁡ θ , {\displaystyle r={\frac {p}{1+\varepsilon \,\cos \theta }},} where p {\displaystyle p} is the semi-latus rectum , ε is the eccentricity of the ellipse, r is the distance from the Sun to the planet, and θ is the angle to the planet's current position from ...

  5. Planetary mass - Wikipedia

    en.wikipedia.org/wiki/Planetary_mass

    The choice of solar mass, M ☉, as the basic unit for planetary mass comes directly from the calculations used to determine planetary mass.In the most precise case, that of the Earth itself, the mass is known in terms of solar masses to twelve significant figures: the same mass, in terms of kilograms or other Earth-based units, is only known to five significant figures, which is less than a ...

  6. Orbital eccentricity - Wikipedia

    en.wikipedia.org/wiki/Orbital_eccentricity

    Here, the total turn is analogous to turning number, but for open curves (an angle covered by velocity vector). The limit case between an ellipse and a hyperbola, when e equals 1, is parabola. Radial trajectories are classified as elliptic, parabolic, or hyperbolic based on the energy of the orbit, not the eccentricity.

  7. Sphere of influence (astrodynamics) - Wikipedia

    en.wikipedia.org/wiki/Sphere_of_influence_(astro...

    Saturn: 54.5: 38,864,730: 1025: ... A more accurate formula is ... Each point on the curves represent a radius or circular orbit and the curve represents their ...

  8. Binary mass function - Wikipedia

    en.wikipedia.org/wiki/Binary_mass_function

    Radial velocity curve with peak radial velocity K=1 m/s and orbital period 2 years. The peak radial velocity is the semi-amplitude of the radial velocity curve, as shown in the figure. The orbital period is found from the periodicity in the radial velocity curve. These are the two observable quantities needed to calculate the binary mass function.

  9. Limiting magnitude - Wikipedia

    en.wikipedia.org/wiki/Limiting_magnitude

    Crumey obtained a formula for as a function of the sky surface brightness, telescope magnification, observer's eye pupil diameter and other parameters including the personal factor discussed above. Choosing parameter values thought typical of normal dark-site observations (e.g. eye pupil 0.7cm and F = 2 {\displaystyle F=2} ) he found N = 7.69 ...