天文测量误差极限：参考星位置对应的最大误差，用角秒表示。

Astrometric Limit: The maximum residual in the place of a reference star, specified in arc seconds.

youdao

天文测量误差极限：参考星位置对应的最大误差，用角秒表示。

Astrometric Limit: The maximum residual in the place of a reference star, specified in arc seconds.

youdao