Copernicus and H crater (L5, L74) (Day 11 Moon)

Copernicus (L5) is a prominent complex crater with multiple central peaks, terraced walls with slump blocks and prominent ejecta rays. Diameter is 93km.

 

Copernicus H (L74) is 4km diameter.

 

In the days when there was debate about whether craters were volcanos or impact features, some people thought that the dark halo around the small crater Copernicus H was evidence for a volcano but its now known to be dark mare lava excavated by a small impact crater digging through bright rays from the main Copernicus strike. This class of object is called a Dark Halo Crater (DHC).

 

Celestron C9.25 with RG 610 Red + Infrared filter. ZWO ASI174MM cooled camera.

 

 

Best 5% of 19048 frames stacked.

 

FireCapture v2.7.10 Settings

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Camera=ZWO ASI174MM-Cool

Filter=R+IR

Profile=Moon

Duration=180.011s

Frames captured=19048

FPS (avg.)=105

Bit depth=8bit

Data=Mono

ROI=1312x812

Shutter=9.366ms

Gain=90 (22%)

Gamma=50

Histogram=85%

eADU=0.765

Limit=3 Minutes

Sensor temperature=12.2°C

Done