Take a close look at this image, can you find the ghost crater? That is Copernicus on the left, Eratosthenes to the upper right, now look between them and down, that dim circle is the crater Stadius. Stadius is a remnant of an ancient crater that has been filled in with lava flows. Stadius is about 69km wide and was named after Johannes Stadius or Estadius (ca. 1 May 1527 – 17 June 1579), who was a Flemish astronomer, astrologer, and mathematician.
Tech Specs: ZWO ASI290MC camera and Meade 12” LX90 telescope mounted on a Celestron CGEM-DX mount. Software used included Sharpcap v2.9, AutoStakkert! Alpha Version 2.3.0.21, ImagesPlus v5.75a, and Registax v6.1.0.8. Photographed on January 7, 2017 from Weatherly, Pennsylvania.