angular size

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size, angular 

The size of an object measured in terms of the angle it subtends. The point of reference for the eye can be either the nodal point or the centre of the entrance pupil. See extended object; apparent size.
apparent s. 1. The size of an object represented by the angular size. 2. The perceived size of an object as distinguished from the actual size (Fig. S8).
s. constancy See size constancy.
s. lens See aniseikonic lens.
Fig. S8 Objects of different size seen in the same direction and with the same angular size stimulate the same retinal points and thus have the same apparent sizeenlarge picture
Fig. S8 Objects of different size seen in the same direction and with the same angular size stimulate the same retinal points and thus have the same apparent size
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References in periodicals archive ?
Analysts stated that based on the apparent size of the new submarine it appears designed to eventually carry missiles.
Rear-plane reticles stay the same apparent size across the magnification range.
As neighbouring China understands only too well in the South China Sea, the so-called 'dots on die map' have a value that belies their apparent size and significance.
Asked about the ethical and credibility questions being raised concerning the financial ability of Indo Power Solutions, the PS defended the apparent size of the Kenyan firm to see the deal through.
It's nearly impossible to compare the apparent size of the supermoon with a micromoon from memory, but when seen side-by-side as in this graphic, it becomes clear.
A super moon is a full moon or a new moon that approximately coincides with the closest distance that the moon reaches to earth in its elliptic orbit (less than 360,000km), resulting in a larger-than-usual apparent size of the lunar disk as seen from earth.
"Any time you catch a full Moon as it rises or sets, while its suspended low on the horizon beaming through the silhouettes of trees or buildings, its apparent size might make you do a double-take.
'The differences in apparent size and brightness amount to few percent but they can enhance the already beautiful sight of the full moon, making a supermoon worth looking up for.'
They're not all the same: The two spheres' nearly perfect match in apparent size means that during the period of totality, the sun's corona - its glowing halo of gas - will be visible behind the moon.
and around four percent greater internal case capacity, the Weatherby version outperforms its more pedestrian cousin by 100 to 200 fps even though there's little apparent size difference.
Unfortunately for Merseysiders, the chance to see a Supermoon of this apparent size won't come again until November 25, 2034.