Magnitude ( ) - The Visual brightness of a star viewed with the naked eye. The Brightest stars are 1st magnitude, Dimmest are 6th magnitude. Each unit of magnitude is 2.512 times greater or smaller than the previous one ( 100 to the 5th root ). For example, a star of = 2.3 is 2.512 times brighter than one of = 3.3 while a star of = 7.0 is 2.512 times dimmer than one of = 6.0. Also see Absolute Magnitude.
The designation given to coordinates that indicate that the position includes effects due to the relative positions of the object and the Earth, the movement of the Earth around the Sun and the object in space.
the physical parameters of the earth measured by a geophysical system are normally expressed as apparent, as in â€œapparent resistivityâ€. This means that the measurement is limited by assumptions made about the geology in calculating the response measured by the geophysical system. Apparent resistivity calculated with HEM, for example, generally assumes that the earth is a homogeneous half-space â€“ not layered.