Mare Orientale

This picture was taken the day before the picture on the previous page.  The libration is similar at -7° 17' in longitude and -1° 07' in latitude.
The picture is a mosaic of four separate images taken when the Moon was 19.9 days old.   In the mouseover I have tried to indicate where I believe the three mountain rings are which define the Orientale basin.  I drew the arcs as ellipses in a graphics program and this does not allow for the reducing scale as the image approaches the limb, so the actual rings are a little bit closer to the centre than indicated close to the limb.  It is difficult to see the mountains clearly because of the lighting but peaks of the Inner Rooks show clearly as white patches just east of Mare Orientale which almost fills this inner ring of the basin.  The Outer Rook mountains are difficult to see, but Lacus Veris is inside the ring and Lacus Autumni outside.  The Cordilleras are even more difficult to see, but Eischstadt lies on their ridge, Lacus Autumni lies within the ring, and Schluter is outside the ridge.  In constructing the arcs I used the known diameters of the rings to scale them and made them concentric by eye.

Date and Time: 24th June 2008 05:34 to 05:49 UT

Camera: Atik 1-HS

Telescope: LX200 at prime focus

Capture: K3CCDTools. Low gamma, 1/250", 25% gain, ~600 frames

Processing: Registax. Histogram as necessary, wavelets 1 = 10, 2 = 5

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