# angular distance

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## angular distance

See apparent distance.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006

## Angular Distance

(religion, spiritualism, and occult)

The distance between points in an astrological chart is always expressed in terms of angular distance. Because the locations of the significant elements of a horoscope are expressed in terms of degrees and minutes (and, occasionally, seconds) of the zodiac, the distance between any two points is similarly expressed as so many degrees and minutes of the arc between them. For example, the angular distance between a planet located at 3°15’ Aries and another planet situated at 24°27’ Aries would be 21°12’.

## angular distance

[′an·gyə·lər ′dis·təns]
(mathematics)
For two points, the angle between the lines from a point of observation to the points.
The angular difference between two directions, numerically equal to the angle between two lines extending in the given directions.
The arc of the great circle joining two points, expressed in angular units.
(physics)
The distance between two points, expressed in wavelengths at a specified frequency.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
daylight saving time) at 40 [degrees] N latitude; Mercury at greatest elongation (maximum apparent separation) from the sun (26 [degrees]).
They have statistically the same parallax distance and may be moving through space together, but their distance from us and their apparent separation implies an unusually long orbit, on the order of 100,000 years.
Apparent separations are the brass tacks of double star observing, as a couple of famous examples will illustrate.
But what's really exciting is the apparent separation between the two planets.
The orbital period of the pair is 167.5 years, and the stars will reach their maximum apparent separation of 1.3" in the year 2040.
Doolittle says that in the late 1970s, when the white dwarf was near its maximum apparent separation of about 11 arcseconds from Sirius, he and some other members of the Amateur Telescope Makers of Boston got an unusual chance to use Harvard College Observatory's 0.38-meter (15-inch) refractor.
This binary lies at a considerable distance from Earth yet still has a very large apparent separation, indicating that the distance between the components must be huge--at least 600 billion kilometers!
The apparent separation of the two stars is increasing, however, and last year I was finally able to catch a glimpse of the Pup with my 4.1-inch (105-mm) refractor on one night of exceptionally fine seeing.
Taking all this into account, computational wizard Jean Meeus finds that Polaris will be closest to the north celestial pole on March 24, 2100, with an apparent separation of 27' 09".
The stars are about 23 parsecs (76 light-years) away, and their apparent separation is currently 4.4[inches].

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