angular diameter


Also found in: Acronyms, Wikipedia.

angular diameter

See apparent diameter.

angular diameter

[′an·gyə·lər ‚dī′am·əd·ər]
(astronomy)
The angle subtended at the observer by a diameter of a distant spherical body which is perpendicular to the line between the observer and the center of the body.
References in periodicals archive ?
The angular diameter (top, in arcminutes) and distance from the Earth (below, in thousands of kilometres) of the Full Moon during 2015.
They measured the angular diameter of Sirius to be about 5.
He calculated the apparent angular diameter of the Sun and that of the Moon, respectively, as 0; 32,59[degrees] (the real magnitude at the maximum phase of this eclipse was 0; 30,49[degrees]) and 0; 32,11[degrees] (the real magnitude at the maximum phase was 0; 32,22[degrees]).
The Indian astronomical hypotheses defined the luminaries' angular diameters as a single variable function of their instantaneous velocity (i.
Mars is best viewed during the early months of the year when it is at its maximum angular diameter.
When at minimum geocentric distance, its maximum angular diameter is 59.
Mars is best viewed towards the end of the year as it starts to brighten from September until the end of the year when it is at its maximum angular diameter.

Full browser ?