Contains:  Solar system body or event
Janssen, Jairo Amaral

Janssen

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Description

Janssen is a large, very old crater from the Pre-Nectarian period. It is eroded by younger craters and has its own system of grooves, Rimae Janssen.

Cropped from a mosaic of five images. Each image was a stack of 1000 best frames from a 60 s video with exposure 15 ms and gain 642. Even under poor seeing, with low elevation, I found deconvolution with a star as PSF a little bit better than laplacian sharpening.

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Janssen, Jairo Amaral