apparent diameter

apparent diameter

(angular diameter) The observed diameter of a celestial body, expressed in degrees, minutes, and/or seconds of arc. See also stellar diameter.
References in periodicals archive ?
Mercury's gibbous globe is then little more than 5" across, not much more than Vi the apparent diameter of Saturn's globe, but it will exhibit much greater surface brightness.
A total solar eclipse--when the moon's apparent diameter is larger than the sun, thereby blocking all direct sunlight, turning day into darkness--will occur on Aug.
The apparent diameter versus refractive index values for the two mixtures appear to be slightly shifted, by the equivalent of [approximately equal to] 0.
Totality was short but this meant that the apparent diameter of the Moon would be only slightly larger than that of the Sun, so we should see impressive Baily's Beads, prominences and chromosphere.
Because Braemar will be based out at sea on the day, this will limit any man-made light pollution, thereby improving guests' views of the eclipse, and giving them the chance to witness that rarest of phenomena, the "Solar Corona," when the Moon's apparent diameter is larger than the Sun, and creates a "pearly white crown" around the Sun.
32 days (sidereal month), moving its own apparent diameter (1/2[degrees]) in slightly over an hour.
Since the apparent diameter of Venus is nearly 1 arc-minute, and apparent diameter of the Sun is 32 arc-minute, hence the planet Venus appears to be only 1/32 of the Sun's apparent diameter.
Urchins oriented significantly only toward targets with an apparent diameter of 12[degrees] (P = 0.
A total solar eclipse occurs when the moonEoACAOs apparent diameter is larger than the sun, he explained further.
The smaller the apparent diameter at kink, the better the kink resistance.
3 (as bright as Sirius), and in a telescope, it reaches an apparent diameter of only 14 arcseconds.