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- Barycentric_Coordinate_Time abstract "Barycentric Coordinate Time (TCB, from the French Temps-coordonnée barycentrique) is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to orbits of planets, asteroids, comets, and interplanetary spacecraft in the Solar system. It is equivalent to the proper time experienced by a clock at rest in a coordinate frame co-moving with the barycenter of the Solar system: that is, a clock that performs exactly the same movements as the Solar system but is outside the system's gravity well. It is therefore not influenced by the gravitational time dilation caused by the Sun and the rest of the system.TCB was defined in 1991 by the International Astronomical Union, in Recommendation III of the XXIst General Assembly. It was intended as one of the replacements for the ill-defined Barycentric Dynamical Time (TDB). Unlike former astronomical time scales, TCB is defined in the context of the general theory of relativity. The relationships between TCB and other relativistic time scales are defined with fully general relativistic metrics.Because the reference frame for TCB is not influenced by the gravitational potential caused by the Solar system, TCB ticks faster than clocks on the surface of the Earth by 1.550505 × 10−8 (about 490 milliseconds per year). Consequently, the values of physical constants to be used with calculations using TCB differ from the traditional values of physical constants (The traditional values were in a sense wrong, incorporating corrections for the difference in time scales). Adapting the large body of existing software to change from TDB to TCB is an ongoing task, and as of 2002 many calculations continue to use TDB in some form.Time coordinates on the TCB scale are conventionally specified using traditional means of specifying days, carried over from non-uniform time standards based on the rotation of the Earth. Specifically, both Julian Dates and the Gregorian calendar are used. For continuity with its predecessor Ephemeris Time, TCB was set to match ET at around Julian Date 2443144.5 (1977-01-01T00Z). More precisely, it was defined that TCB instant 1977-01-01T00:00:32.184 exactly corresponds to the TAI instant 1977-01-01T00:00:00.000 exactly, at the geocenter. This is also the instant at which TAI introduced corrections for gravitational time dilation.".
- Barycentric_Coordinate_Time wikiPageID "345322".
- Barycentric_Coordinate_Time wikiPageLength "2978".
- Barycentric_Coordinate_Time wikiPageOutDegree "28".
- Barycentric_Coordinate_Time wikiPageRevisionID "672037215".
- Barycentric_Coordinate_Time wikiPageWikiLink Asteroid.
- Barycentric_Coordinate_Time wikiPageWikiLink Barycenter.
- Barycentric_Coordinate_Time wikiPageWikiLink Barycentric_Dynamical_Time.
- Barycentric_Coordinate_Time wikiPageWikiLink Category:General_relativity.
- Barycentric_Coordinate_Time wikiPageWikiLink Category:Time_scales.
- Barycentric_Coordinate_Time wikiPageWikiLink Comet.
- Barycentric_Coordinate_Time wikiPageWikiLink Coordinate_time.
- Barycentric_Coordinate_Time wikiPageWikiLink Ephemeris_Time.
- Barycentric_Coordinate_Time wikiPageWikiLink Ephemeris_time.
- Barycentric_Coordinate_Time wikiPageWikiLink French_language.
- Barycentric_Coordinate_Time wikiPageWikiLink General_relativity.
- Barycentric_Coordinate_Time wikiPageWikiLink Geocentric_Coordinate_Time.
- Barycentric_Coordinate_Time wikiPageWikiLink Geocentric_coordinates.
- Barycentric_Coordinate_Time wikiPageWikiLink Gravitational_potential.
- Barycentric_Coordinate_Time wikiPageWikiLink Gravitational_time_dilation.
- Barycentric_Coordinate_Time wikiPageWikiLink Gravity_well.
- Barycentric_Coordinate_Time wikiPageWikiLink Gregorian_calendar.
- Barycentric_Coordinate_Time wikiPageWikiLink International_Astronomical_Union.
- Barycentric_Coordinate_Time wikiPageWikiLink International_Atomic_Time.
- Barycentric_Coordinate_Time wikiPageWikiLink Julian_Date.
- Barycentric_Coordinate_Time wikiPageWikiLink Julian_day.
- Barycentric_Coordinate_Time wikiPageWikiLink Metric_tensor_(general_relativity).
- Barycentric_Coordinate_Time wikiPageWikiLink Planet.
- Barycentric_Coordinate_Time wikiPageWikiLink Proper_frame.
- Barycentric_Coordinate_Time wikiPageWikiLink Proper_time.
- Barycentric_Coordinate_Time wikiPageWikiLink Solar_System.
- Barycentric_Coordinate_Time wikiPageWikiLink Solar_system.
- Barycentric_Coordinate_Time wikiPageWikiLink Spacecraft.
- Barycentric_Coordinate_Time wikiPageWikiLink Sun.
- Barycentric_Coordinate_Time wikiPageWikiLink Terrestrial_Time.
- Barycentric_Coordinate_Time wikiPageWikiLink Time_standard.
- Barycentric_Coordinate_Time wikiPageWikiLinkText "Barycentric Coordinate Time BCT(TCB)".
- Barycentric_Coordinate_Time wikiPageWikiLinkText "Barycentric Coordinate Time".
- Barycentric_Coordinate_Time wikiPageWikiLinkText "TCB second".
- Barycentric_Coordinate_Time wikiPageWikiLinkText "TCB".
- Barycentric_Coordinate_Time hasPhotoCollection Barycentric_Coordinate_Time.
- Barycentric_Coordinate_Time wikiPageUsesTemplate Template:Refimprove.
- Barycentric_Coordinate_Time wikiPageUsesTemplate Template:Reflist.
- Barycentric_Coordinate_Time wikiPageUsesTemplate Template:Time_measurement_and_standards.
- Barycentric_Coordinate_Time subject Category:General_relativity.
- Barycentric_Coordinate_Time subject Category:Time_scales.
- Barycentric_Coordinate_Time type Article.
- Barycentric_Coordinate_Time type Article.
- Barycentric_Coordinate_Time comment "Barycentric Coordinate Time (TCB, from the French Temps-coordonnée barycentrique) is a coordinate time standard intended to be used as the independent variable of time for all calculations pertaining to orbits of planets, asteroids, comets, and interplanetary spacecraft in the Solar system.".
- Barycentric_Coordinate_Time label "Barycentric Coordinate Time".
- Barycentric_Coordinate_Time sameAs Waktu_Koordinat_Baripusat.
- Barycentric_Coordinate_Time sameAs m.01ymz3.
- Barycentric_Coordinate_Time sameAs Težiščni_koordinatni_čas.
- Barycentric_Coordinate_Time sameAs Q4866000.
- Barycentric_Coordinate_Time sameAs Q4866000.
- Barycentric_Coordinate_Time wasDerivedFrom Barycentric_Coordinate_Time?oldid=672037215.
- Barycentric_Coordinate_Time isPrimaryTopicOf Barycentric_Coordinate_Time.