second star of the evening
Refers to the second-brightest star visible in the evening sky, often used in poetic or observational contexts. Not a common everyday word.
夕暮れに二番星が輝き始めた。
The second star of the evening began to shine at dusk.
Compound of 二番 (second) and 星 (star). The reading にばんぼし is a straightforward combination of the readings of its components.