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minute of arc
(redirected from Arcseconds)

    Also found in: Wikipedia 0.02 sec.
min·ute of arc  (mnt)
n.
See minute1.
ThesaurusLegend:  Synonyms Related Words Antonyms
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
arcminute, minute
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"
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the maximum interval in minutes equals the full width at half maximum (FWHM) of a star image in arcseconds divided by the rate of motion of the asteroid in arcseconds per minute.
A method for or determining the V magnitude of aster asteroids from ... by Dymock, Roger; Miles, Richard / Journal of the British Astronomical Association
And Mars will appear to be about 20 arcseconds in diameter--much less than the full Moon which measures 30 arcminutes across.
Summer space highlights; NASA scores some victories by Bruno, Melissa / The Informed Constituent (Albany, NY)
That's not very big - the full moon is 1,800 arcseconds - but Mars won't be closer than it is now until the year 2287.
Looking toward Mars by The Register-Guard (Eugene, OR)
 
 
 
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