apparent distance

apparent distance

(angular distance; angular separation) The observed distance between two celestial bodies, expressed in degrees, minutes, and/or seconds of arc.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in classic literature ?
Belfast, director of the Cambridge Observatory, and reached the station of Long's Peak, where the telescope was erected which brought the moon within an apparent distance of two leagues.
About 1835 a small treatise, translated from the New York American , related how Sir John Herschel, having been despatched to the Cape of Good Hope for the purpose of making there some astronomical calculations, had, by means of a telescope brought to perfection by means of internal lighting, reduced the apparent distance of the moon to eighty yards!
His personal attentions to Maggie were comparatively slight, and there had even sprung up an apparent distance between them, that prevented the renewal of that faint resemblance to gallantry into which he had fallen the first day in the boat.
There was no significant difference between males and females in the mean apparent distance moved (t = 0.26 with 63 df, P = 0.799).
"Since Mars will shine dimly through this mask," he advises, "you can more easily judge the distance and direction from the planet where you should look for each moon." It's always best to attempt to detect these tiny wisps of light near the time of their eastern or western elongations, when their apparent distance from Mars is greatest; rotate the eyepiece so that the edge of the filter mask is aligned on the planet's north-south line.
The typical output of a TDR measurement is a reflectogram, which displays the reflection coefficient ([rho]) of the system under test as a function of the apparent distance ([d.sup.app]).
This value is the apparent distance above sea level measured by the difference in pressure.
Failure of some BJP extremists' communal campaign in by-polls held recently made it probably all the more politically important for Modi to convince India and rest of the world about the apparent distance he is keeping from communal terrorists linked with the saffron brigade.
The new voyages show eastern Canada to be accessible on UK cruises, in spite of its apparent distance, with Liverpool still the ideal departure port.
When an inner planet is at the greatest apparent distance from the Sun, it is said to be at greatest elongation.
And yet perhaps precisely such apparent distance made Museum of Modern Art curator Laura Hoptman's "Ecstatic Alphabets/Heaps of Language" at once uniquely pleasurable and provocative, as Hoptman placed more recent artistic endeavors in intriguing historical perspective by using text as her exhibition's fulcrum.
In TDR measurements, the time-dependent reflection coefficient (p) of the material/device under test can be directly displayed as a function of the apparent distance ([d.sup.app]) traveled by the signal that propagates along the sensing element.