2728 asteroid positions (Kitab obs.)

Photographic observations of XX century contained numerous and varied information about all objects and events of the Universe fixed on the astronegatives. The original and...20世纪的天文摄影观测资料中，包含了大量关于宇宙各类天体与事件的多元信息，这些信息均被记录于天文负片（astronegatives）之上。原始的……