Take an arc of one degree, divide it into sixty, and that's an arcminute.
取一个度的弧度，将其分成六十分，就是一个弧分。
Arcminute
原声例句
PBS太空科学
PBS太空科学
This 1.5 billion pixel image from the Hubble telescope covers about a thousand square arcminutes, and contains more than 100 million stars.
这张来自哈勃望远镜的 15 亿像素图像覆盖了大约 1000 平方角分，包含了超过 1 亿颗恒星。
英语百科
Minute and second of arc
（重定向自Arcminute）
A minute of arc, arcminute (arcmin), arc minute, or minute arc is a unit of angular measurement equal to one-sixtieth (1/60) of one degree. As one degree is 1/360 of a circle, one minute of arc is 1/21600 of a circle (or, in radians, π/10800). A second of arc, arcsecond (arcsec), or arc second is 1/60 of an arcminute, 1/3,600 of a degree, 1/1,296,000 of a circle, and π/648,000 (about 1/206,265) of a radian. These units originated in Babylonian astronomy as sexagesimal subdivisions of the degree; they are used in fields that involve very small angles, such as astronomy, optometry, ophthalmology, optics, navigation, land surveying and marksmanship.
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