minute of arc

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min·ute of arc

See minute1.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.minute of arc - a unit of angular distance equal to a 60th of a degreeminute of arc - a unit of angular distance equal to a 60th of a degree
angular unit - a unit of measurement for angles
arcdegree, degree - a measure for arcs and angles; "there are 360 degrees in a circle"
arcsecond, second - a 60th part of a minute of arc; "the treasure is 2 minutes and 45 seconds south of here"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Finally, Zygo's Optics business segment is able to supply prisms with sub arc-second angle tolerances, very flat surfaces and excellent transmitted wavefront characteristics.
These laser-optic-quality prisms feature a [+ or -]15 arc-second angular tolerance for guaranteed control of the optical path.
Solar granules are typically the size of Alaska--though they look small from Earth, a mere arc-second or two across.
The mean sky brightness per square arc-second based on these measurements are: B = 20.77[+ or -]0.03, V = 19.85[+ or -]0.04 R = 19.51[+ or -]0.04 and I = 18.40[+ or -]0.05.
With an angular measuring sensitivity of 1 arc-second (0.0003 degrees), tins system is ideal for aligning precision mounts and fixtures, antenna arrays, molding machine platens, press faces, and other assemblies.
Fixing a telescope to a particular celestial body against the rotation of the earth requires a drive that is precise, smooth and most especially, slow--to a 0.27 arc-second resolution in the image plane.
"We're likely to get very important microwave background observations on the degree, arc-minute, and arc-second scales," says David N.
Now my list of resolved double stars includes a 0.04 arc-second double.
In particular, an unidentified foreground galaxy splits the quasar's image into two components separated in space by one arc-second -- equivalent to a separation of about 10,000 light-years at the estimated location of the foreground galaxy.
Jeff Hester and his colleagues at the California Institue of Technology in Pasadena photographed this bright star, its gas halo and the surrounding interstellar medium in unprecedented detail, resolving structures just a few tenths of an arc-second across.