A person with excellent vision can resolve 1/60[degrees] or 1 arcminute
(1' = 0.
, minute of arc, or MOA is a unit of angular measurement equal to 1/60 of 1 degree.
Dense scotomas were mapped with a 12 arcminute
square target with a 50,000 Td retinal illuminance.
The sample alignment thus requires only arcminute
precision to locate the minimum in [[PHI].
The new evidence comes from the Arcminute
Cosmology Bolometer Array Receiver (ACBAR), a South Pole network of 16 detectors that probes the temperature of the Big Bang's remnant radiation, known as the cosmic microwave background.
During the transit, Venus will present a disk about one arcminute
is divided into 60 arcseconds (60"), which is about the resolution of the human eye.
One sixtieth of a degree of angular measure.
A Starlight Xpress SXVR-H18 CCD camera (11) makes good use of the flatter field of the HD optics with a 22x16 arcminute
field at f/10, which I sample with 2x2 binning at 0.
It is believed to display only a small circular haze less than 1 arcminute
across with understandably no stars resolved.
Over a 14-hour span on September 23, centred on 11:50UT, Uranus draws to within one arcminute
of 44 Piscium--an angular separation less than the dark-adapted eye's resolution limit.
At Uraniborg's observatory, Stjerneborg, these instruments achieved arcminute
accuracy, close to the theoretical resolving power of the human eye.