Noun
visual binary (plural visual binaries)
(astronomy) A binary star whose components can be visually resolved.
Before applying Kepler's 3rd Law, the inclination of the orbit of the visual binary must be taken into account. Source: Internet
A visual binary is a gravitationally bound system citation that can be resolved into two stars with the aid of a telescope. Source: Internet
Its main asterism consists of six stars, Assuming the visual binary Epsilon is counted as single stars, and only one of Delta1 and Delta2 Lyrae is counted as part of the pattern. Source: Internet
A visual binary consists of two stars, usually of a different brightness. Source: Internet
In the measures of a visual binary, the position angle will change progressively and the separation between the two stars will oscillate between maximum and minimum values. Source: Internet
Taken over a period of time, the apparent relative orbit of the visual binary system will appear on the celestial sphere. Source: Internet