• Thumbnail for Hill sphere
    The Hill sphere is a common model for the calculation of a gravitational sphere of influence. It is the most commonly used model to calculate the spatial...
    26 KB (2,936 words) - 21:35, 2 October 2024
  • (a period of 1 month and 27 days) it will pass just outside Earth's Hill sphere (roughly 0.01 AU [1.5 million km; 0.93 million mi]) at a low relative...
    8 KB (435 words) - 23:28, 5 October 2024
  • the sphere of activity which extends well beyond the sphere of influence. The most common base models to calculate the sphere of influence is the Hill sphere...
    13 KB (1,385 words) - 00:06, 9 September 2024
  • the Spheres) Dyson sphere, a hypothetical megastructure that encompasses a star and captures a large percentage of its solar power output Hill sphere, the...
    5 KB (626 words) - 09:14, 17 September 2024
  • Thumbnail for Lagrange point
    equal distances r from the smaller object, equal to the radius of the Hill sphere, given by: r ≈ R μ 3 3 {\displaystyle r\approx R{\sqrt[{3}]{\frac {\mu...
    50 KB (5,703 words) - 17:40, 30 August 2024
  • 2022 and 3 July 2022 (a period of 22 days) it passed within Earth's Hill sphere (roughly 0.01 AU (1.5 million km; 0.93 million mi)) at a low relative...
    11 KB (791 words) - 20:39, 10 September 2024
  • Thumbnail for Solar System
    as Comet West, have aphelia around 70,000 AU from the Sun. The Sun's Hill sphere with respect to the galactic nucleus, the effective range of its gravitational...
    222 KB (21,915 words) - 15:37, 3 October 2024
  • surface of a sphere of tungsten half a metre in radius would travel at slightly more than 1 mm/s, completing an orbit every hour. If the same sphere were made...
    17 KB (2,059 words) - 14:38, 18 June 2024
  • Thumbnail for Earth's orbit
    surface covered by water in the southern hemisphere. The Hill sphere (gravitational sphere of influence) of the Earth is about 1,500,000 kilometers (0...
    17 KB (1,837 words) - 13:35, 14 September 2024
  • such a way that it appears to orbit Earth, but well outside Earth's Hill sphere, making it a quasi-satellite. The orbit of 2023 FW13 has a one-to-one...
    5 KB (214 words) - 19:04, 10 April 2024
  • Thumbnail for Oort cloud
    cosmographic boundary of the Solar System. This area is defined by the Sun's Hill sphere, and hence lies at the interface between solar and galactic gravitational...
    56 KB (6,186 words) - 00:27, 5 September 2024
  • In astrophysics, a temporary satellite is any body that enters the Hill sphere of a planet at a sufficiently low velocity such that it becomes gravitationally...
    11 KB (1,231 words) - 17:08, 26 September 2024
  • Thumbnail for Sphere eversion
    In differential topology, sphere eversion is the process of turning a sphere inside out in a three-dimensional space (the word eversion means "turning...
    12 KB (1,126 words) - 22:16, 30 June 2024
  • Thumbnail for 3753 Cruithne
    the other side of the Sun, placing Cruithne well outside of Earth's Hill sphere. Its orbit takes it near the orbit of Mercury and outside the orbit of...
    16 KB (1,699 words) - 09:29, 18 August 2024
  • Thumbnail for 2020 SO
    object became temporarily captured on 8 November when it entered Earth's Hill sphere. It entered via the outer Lagrange point L2 and will exit via Lagrange...
    17 KB (1,238 words) - 02:13, 22 September 2024
  • Thumbnail for Outer space
    potentials from other bodies, is the body's sphere of influence or gravity well, mostly described with the Hill sphere model. In the case of Earth this includes...
    137 KB (13,488 words) - 16:04, 20 September 2024
  • Thumbnail for Irregular moon
    {\displaystyle r_{H}} . The radius of the Hill sphere is given in the adjacent table: Uranus and Neptune have larger Hill sphere radii than Jupiter and Saturn, despite...
    39 KB (3,985 words) - 20:46, 17 September 2024
  • Thumbnail for 2020 CD3
    CD3 around Earth ranged from 70 to 90 days. 2020 CD3 escaped Earth's Hill sphere at roughly 0.01 AU (1.5 million km) in March 2020 and returned to solar...
    34 KB (2,691 words) - 07:37, 23 September 2024
  • Thumbnail for Apsis
    Archived July 29, 2017, at the Wayback Machine is also common (e.g., McGraw Hill Dictionary of Scientific and Technical Terms, 5th edition, 1994, p. 114)...
    42 KB (3,897 words) - 20:31, 21 September 2024
  • asteroid in June 2007 as it was escaping Earth's hill sphere. Though it was outside of Earth's hill sphere, the geocentric orbital eccentricity was not greater...
    23 KB (1,784 words) - 20:40, 10 September 2024
  • Thumbnail for Io (moon)
    plasma torus (discussed below) and by other processes into filling Io's Hill sphere, which is the region where Io's gravity is dominant over Jupiter's. Some...
    114 KB (12,474 words) - 01:51, 16 September 2024
  • Thumbnail for 1991 VG
    Earth from 23 February to 21 March 1992, but was outside of Earth's Hill sphere. This temporary capture has taken place multiple times in the past and...
    14 KB (1,297 words) - 20:36, 10 September 2024
  • Thumbnail for Escape velocity
    typically used to determine whether an object will remain in the gravitational sphere of influence of a given body. For example, in solar system exploration it...
    28 KB (3,658 words) - 16:51, 29 September 2024
  • Thumbnail for True anomaly
    equation Celestial mechanics Gravitational influences Barycenter Hill sphere Perturbations Sphere of influence N-body orbits Lagrangian points (Halo orbits)...
    8 KB (1,111 words) - 11:49, 10 July 2024
  • Thumbnail for 469219 Kamoʻoalewa
    translates into 12 lunar distances. This distance is well outside of Earth's Hill sphere of 1.5 million km (3.9 LD). In a frame of reference that rotates once...
    22 KB (2,033 words) - 03:47, 21 August 2024
  • Thumbnail for Light-year
    Szirtes (1997), Applied dimensional analysis and modeling, New York: McGraw-Hill, p. 60, ISBN 978-0-07-062811-3 Comins, Neil F. (2013), Discovering the Essential...
    24 KB (1,934 words) - 19:24, 16 September 2024
  • Thumbnail for Parabolic trajectory
    equation Celestial mechanics Gravitational influences Barycenter Hill sphere Perturbations Sphere of influence N-body orbits Lagrangian points (Halo orbits)...
    7 KB (1,090 words) - 12:30, 23 August 2024
  • Thumbnail for Lunar orbit
    insufficient and three-body models are required. Although the Moon's Hill sphere extends to a radius of 60,000 km (37,000 mi), the gravity of Earth intervenes...
    16 KB (1,721 words) - 00:05, 26 September 2024
  • Thumbnail for Azimuth
    (positive eastward). We can get a fair approximation by assuming the Earth is a sphere, in which case the azimuth α is given by tan ⁡ α = sin ⁡ L cos ⁡ φ 1 tan...
    14 KB (1,766 words) - 01:58, 25 September 2024
  • Thumbnail for Quasi-satellite
    to true satellites, quasi-satellite orbits lie outside the planet's Hill sphere, and are unstable. Over time they tend to evolve to other types of resonant...
    14 KB (1,588 words) - 14:15, 29 July 2024