September 2, 2007
ToUcam Pro (640x480) with Baader Planetarium IR-Pass Filter
Nature Center - Owl Observatory
f/10 LX200 Schmidt-Cassegrain
acquired with IRIS. RegiStax 4 aligned and stacked only 29
601 images (bad seeing). Wavelet filters adjusted with
Further enhancements made
with Adobe Photoshop 7.0.
three large craters featured in this image are all named
for citizens of the city of Alexandria, the
center of science in the ancient world.
Below and left of center is Catharina. Name for St. Catharina, a
of Christian philosophers, it measures 100 km (62 miles) in
Above and right of center is the crater Cyrillus, which is 98 km (61
width. It’s named after St. Cyril, a Bishop of Alexandria, who
444 AD. Along with Catharina, these two form a dumbbell-like
structure. The third crater, mostly lost in darkness, is
is also 100 km in diameter. This crater is named for St.
was also a Bishop of Alexandria from 385 AD until his death in 412
All three craters have ring mountain systems in various states of