coordinate Comparison Table

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coordinate comparison table

Subject has terrestrial longitude has height has celestial longitude has right ascension has terrestrial latitude has definition has celestial latitude has declination has galactic longitude has component has frame of reference has azimuth has galactic latitude has coordinate origin has elevation

co-moving coordinate Coordinates fixed with respect to the overall Hubble flow of the universe, so that they do not change as the universe expands. coordinate component

ecliptic coordinate A system of coordinates based on the plane defined by Earth's orbit around the Sun, which is inclined to the celestial equator. ecliptic coordinate component

equatorial coordinate equatorial coordinate component

galactic coordinate A system of coordinates based on the mean plane of the Galaxy, which is inclined about 63° to the celestial equator. Galactic latitude (b) is measured from the galactic equator north (+) or south (-); galactic longitude (l) is measured eastward along the galactic plane from the galactic center. In 1958, because of increased precision in determining the location of the galactic center, a new system of galactic coordinates was adopted, with the origin at the galactic center in Sagittarius at α(1950) = 17^h42^m.4, δ(1950) = - 28°55'. The new system is designated by a superior roman numeral II (i.e., b^II, l^II) and the old system by a superior roman numeral I: l^II ≈ l^I + 32^°.31. Galactic coordinates are independent of precession. galactic coordinate component

geocentric coordinate The latitude and longitude of a point on the Earth's surface relative to the center of the Earth; also celestial coordinates given with respect to the center of the Earth. geocentric coordinate component Earth

geodetic coordinate The latitude and longitude of a point on the Earth's surface determined from the geodetic vertical (normal to the specified spheroid). (See zenith; latitude, terrestrial; longitude, terrestrial.) coordinate component

local coordinate local coordinate component observer location on the surface of the Earth

planetocentric coordinate Coordinates for general use, where the z-axis is the mean axis of rotation; the x-axis is the intersection of the planetary equator (normal to the z-axis through the center of mass) and an arbitrary prime meridian; and the y-axis completes a right-hand coordinate system. Longitude (see longitude, celestial) of a point is measured positive to the prime meridian as defined by rotational elements. Latitude (see latitude, celestial) of a point is the angle between the planetary equator and a line to the center of mass. The radius is measured from the center of mass to the surface point. coordinate component

planetographic coordinate Coordinates for cartographic purposes dependent on an equipotential surface as a reference surface. Longitude (see longitude, celestial) of a point is measured in the direction opposite to the rotation (positive to the west for direct rotation) from the cartographic position of the prime meridian defined by a clearly observable surface feature. Latitude (see latitude, celestial) of a point is the angle between the planetary equator (normal to the z-axis and through the center of mass) and normal to the reference surface at the point. The height of a point is specified as the distance above a point with the same longitude and latitude on the reference surface. coordinate component

rotating coordinate coordinate component rotating reference frame

selenocentric coordinate With reference to the center of the Moon. coordinate component Moon

topocentric coordinate With reference to, or pertaining to, a point on the surface of the Earth, usually with reference to a coordinate system. coordinate component

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Subject	has terrestrial longitude	has height	has celestial longitude	has right ascension	has terrestrial latitude	has definition	has celestial latitude	has declination	has galactic longitude	has component	has frame of reference	has azimuth	has galactic latitude	has coordinate origin	has elevation
co-moving coordinate						Coordinates fixed with respect to the overall Hubble flow of the universe, so that they do not change as the universe expands.				coordinate component
ecliptic coordinate						A system of coordinates based on the plane defined by Earth's orbit around the Sun, which is inclined to the celestial equator.				ecliptic coordinate component
equatorial coordinate										equatorial coordinate component
galactic coordinate						A system of coordinates based on the mean plane of the Galaxy, which is inclined about 63° to the celestial equator. Galactic latitude (b) is measured from the galactic equator north (+) or south (-); galactic longitude (l) is measured eastward along the galactic plane from the galactic center. In 1958, because of increased precision in determining the location of the galactic center, a new system of galactic coordinates was adopted, with the origin at the galactic center in Sagittarius at α(1950) = 17^h42^m.4, δ(1950) = - 28°55'. The new system is designated by a superior roman numeral II (i.e., b^II, l^II) and the old system by a superior roman numeral I: l^II ≈ l^I + 32^°.31. Galactic coordinates are independent of precession.				galactic coordinate component
geocentric coordinate						The latitude and longitude of a point on the Earth's surface relative to the center of the Earth; also celestial coordinates given with respect to the center of the Earth.				geocentric coordinate component				Earth
geodetic coordinate						The latitude and longitude of a point on the Earth's surface determined from the geodetic vertical (normal to the specified spheroid). (See zenith; latitude, terrestrial; longitude, terrestrial.)				coordinate component
local coordinate										local coordinate component				observer location on the surface of the Earth
planetocentric coordinate						Coordinates for general use, where the z-axis is the mean axis of rotation; the x-axis is the intersection of the planetary equator (normal to the z-axis through the center of mass) and an arbitrary prime meridian; and the y-axis completes a right-hand coordinate system. Longitude (see longitude, celestial) of a point is measured positive to the prime meridian as defined by rotational elements. Latitude (see latitude, celestial) of a point is the angle between the planetary equator and a line to the center of mass. The radius is measured from the center of mass to the surface point.				coordinate component
planetographic coordinate						Coordinates for cartographic purposes dependent on an equipotential surface as a reference surface. Longitude (see longitude, celestial) of a point is measured in the direction opposite to the rotation (positive to the west for direct rotation) from the cartographic position of the prime meridian defined by a clearly observable surface feature. Latitude (see latitude, celestial) of a point is the angle between the planetary equator (normal to the z-axis and through the center of mass) and normal to the reference surface at the point. The height of a point is specified as the distance above a point with the same longitude and latitude on the reference surface.				coordinate component
rotating coordinate										coordinate component	rotating reference frame
selenocentric coordinate						With reference to the center of the Moon.				coordinate component				Moon
topocentric coordinate						With reference to, or pertaining to, a point on the surface of the Earth, usually with reference to a coordinate system.				coordinate component