Nubium / Mare Humorum Rills
South is up in this image, more info below.
Instrument: 12.5" f/5 prime
Platform: Astrophysics AP1200
CCD Camera: Image Source DMK 31AU03.AS
Filter: Hoya R72
Exposure: 1/100 sec 15fps
Location: Payson, Arizona
Elevation: 5150 ft.
Sky: Seeing good, Transparency 8/10
Outside Temperature: 35F
Processing: Registax, PixInsight Pro, Photoshop CS3, Focus Magic Plugin
This prime focus image includes a fairly
tame region for details, however closer examination reveals some
amazing features. The straight wall, Rupes Recta is a 70 mile
long scarp (cliff) that in places is over 1000 feet tall. There
is no equal to such a structure here on Earth. The large smooth
sea that dominates the center of this frame is Mare Nubium, with
the steep walls 60 mile diameter crater with walls exceeding
ten thousand feet in height. What really compelled me to posting
this image is the concentric rilles to the left of the half covered
Mare Humorum on the upper right terminator. Known collectively
as Rimae Hippalus, these are stress fractures left over from
the formation of Mare Humorum. Look how beautifully they wrap
around the basin.
best frames, MAP 35 alignment in Registax, Regulated Van Cittert
Deconvolution in PixInsight Pro, Levels and Contrast Masking
In Photoshop CS3, Focus Magic Plugin.