The barycentric celestial reference system (BCRS) is a coordinate system used in astrometry to specify the location and motions of astronomical objects...
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International Celestial Reference System (ICRS) ... for the optical domain." Astrometry Astronomy Barycentric and geocentric celestial reference systems International...
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north or other reference cardinal direction Barycentric and geocentric celestial reference systems – Celestial coordinate system Celestial sphere – Imaginary...
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the barycentric celestial reference system (BCRS) centered at the barycenter of the Solar System, and the geocentric celestial reference system (GCRS)...
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caused by the Earth. The TCG is the time coordinate for the Geocentric Celestial Reference System (GCRS). TCG was defined in 1991 by the International Astronomical...
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CRS (section Science and technology)
core router Celestial Reference System(s), see Barycentric and geocentric celestial reference systems Cluster Ready Services, components of Oracle Clusterware...
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new time scales: Barycentric Coordinate Time (TCB) and Geocentric Coordinate Time (TCG). TCB was intended as a replacement for TDB, and TCG was its equivalent...
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used in the Hamiltonian treatment of mechanics. Barycentric coordinate system as used for ternary plots and more generally in the analysis of triangles....
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dilation caused by the Sun and the rest of the system. TCB is the time coordinate for the Barycentric Celestial Reference System (BCRS). TCB was defined...
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Jet Propulsion Laboratory Development Ephemeris (category Celestial mechanics)
velocities and accelerations of major Solar System bodies, tabulated at equally spaced intervals of time, covering a specified span of years. Barycentric rectangular...
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proper time on Earth to coordinate time in solar system barycentric space-time frame of reference", Celestial Mechanics, vol.23 (1981), pages 33-56.) S A Klioner...
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Escape velocity (section Barycentric escape velocity)
the system of bodies. Thus for systems of two bodies, the term escape velocity can be ambiguous, but it is usually intended to mean the barycentric escape...
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Moon's average barycentric orbital speed is 1.010 km/s, whilst the Earth's is 0.012 km/s. The total of these speeds gives a geocentric lunar average orbital...
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History of timekeeping devices (redirect from Time and measurement)
well-defined and determined by natural changes throughout the year, including celestial events. Lunar phases were used to mark shorter periods of time; the Yaraldi...
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Time (section Miscellaneous arts and sciences)
Terrestrial Time is a theoretical ideal scale realized by TAI. Geocentric Coordinate Time and Barycentric Coordinate Time are scales defined as coordinate times...
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(though not affecting Teph), and TDB has been replaced by Barycentric Coordinate Time (TCB) and Geocentric Coordinate Time (TCG), and redefined to be JPL ephemeris...
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International Date Line (category Articles needing additional references from July 2022)
use of the terrestrial and celestial globes. New York: E. Steiger. p. 27. "Missionary writing in Polynesia", Missionary Writing and Empire, 1800–1860, Cambridge...
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VSOP model (category Articles needing additional references from July 2023)
the day VSOP87E Barycentric ecliptic rectangular coordinates for the equinox J2000.0, relative to the barycentre of the solar system. The VSOP87 tables...
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Theoretical astronomy (category Astronomical coordinate systems)
The current fundamental relativistic time scales are Geocentric Coordinate Time (TCG) and Barycentric Coordinate Time (TCB). Both of these have rates that...
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Ephemeris time (section Notes and references)
Terrestrial Time (TT), Geocentric Coordinate Time GCT (TCG) and Barycentric Coordinate Time BCT (TCB). High-precision ephemerides of sun, moon and planets were...
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Planet Nine (category Astronomical events of the Solar System)
a distant planet, but it produced 17 new outer Solar System body candidates located at geocentric distances in the range 80–200 AU, that need follow-up...
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Hipparcos (redirect from Hipparcos Celestial Reference Frame)
distances of celestial objects on the sky. This permitted the first high-precision measurements of the intrinsic brightnesses, proper motions, and parallaxes...
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(astrophysics terminology) Barycentric Coordinate Time TCC – Theory of Cryptography Conference TCG – (astrophysics terminology) Geocentric Coordinate Time TDB...
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Julian day (category Celestial mechanics)
Atomic Time (TAI), Terrestrial Time (TT), Barycentric Coordinate Time (TCB), or Coordinated Universal Time (UTC) and that the scale should be indicated when...
53 KB (6,597 words) - 17:36, 16 June 2025