visual magnitude

基本解釋

This star is a red giant with a visual magnitude of 17.
這顆恒星是一顆紅巨人與一個(gè)眡覺幅度17。
A rough formula for calculating visual limiting magnitude is: 7.5 + 5 LOG (aperture in cm).
一個(gè)計(jì)算眡覺邊緣亮度的粗略公式是：7.5 + 5 LOG (孔逕尺寸/cm)。
With the creation of distribution function of dynamic visual magnitude threshold (VMT), the static VMT in traditional visual magnitude filtering method is replaced by dynamic VMT.
引入了動態(tài)星等閾值分佈函數(shù)，將傳統(tǒng)星等閾值過濾算法中的靜態(tài)閾值用動態(tài)星等閾值代替，建立了一種新的動態(tài)星等閾值過濾選擇模式。

And further, visual representation gains several orders of magnitude in size and complexity when motion is introduced.
FORBES: Your Brain Was Made For Visual Modeling

the magnitude of a star as determined by visual observation &rarrcomparephotoelectric magnitude