minute of arc

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minute of arc

(arc minute; arc min) See arc second.
Collins Dictionary of Astronomy © Market House Books Ltd, 2006
References in periodicals archive ?
arcsecond One sixtieth of an arcminute, or 1/3600 of a degree.
A prominent magnitude 9 yellow star (HD 20224) is situated about 4 arcminutes to the north-east.
At 20:34 UT, Venus will be just 1.5 arcminutes from the Moon's limb and will appear to the unaided eye as a brilliant silvery white spot of light immediately adjacent to the Moon's lower cusp.
Declination is expressed in degrees, arcminutes, and arcseconds north (+) or south (-) of the celestial equator.
If two objects lie a quarter degree apart, astronomers might note that as 15 arcminutes, abbreviated 15'.
Given for each star are its separation in arcminutes and the direction of the fainter star from the brighter one, then the magnitude, spectral type, and distance in light-years of each.
I was amazed to find that I could remove and replace the mount on this base plate and maintain polar alignment to within an arcminute or two.
A 31-mm Tele Vue Nagler eyepiece produces 645x and gave us a true field of view of about 7.6 arcminutes. My first look through the eyepiece left me speechless.
M27 is of course somewhat larger (on the sky), about 8 arcminutes long, whereas M76 is about 3 arcminutes.
In 2008 the angular separation is closer to 42 arcminutes, and it will be after 2060 before the separation is under 30 arcminutes (0.5[degrees]).
It's small (about 8 by 4 arcminutes in extent) and presents a pallid face to small scopes.
Both clusters are small, at 10 and 4 arcminutes across, respectively, and they can be rather challenging to pull out of the rich background star field.