Mare Crisium and Petavius with my 11″ SCT

Date: 11/29/2011

Location: San Bruno, CA

Seeing: 3/10, Transparency:  3/6, No Wind.

Celestron 11″ EdgeHD with DMK AS41 camera at F/D 10  (resolution: 1280×960)

Software:  Avi Stack (stacking of about 800 frames each), Photoshop CS4, Astraimage Wavelet filter

Both pictures were taken using a Baader Infrared pass band filter IR742. Not only this filter improve images degraded by bad seeing, but it helps taking pictures of the moon by reducing the (sometime too) high contrast between different parts of the lunar landscape.

Mare Crisium

In the “virtual atlas of the moon” I can read the following:

Type: Sea
Geological period: Nectarian (From -3.92 billions years to -3.85 billions years)
Size: Dimension: 638.0×638.0Km / 375.0×345.0Mi

Description:Formation with crater shape lengthened West East.
Very flat floor with ring of wrinkle ridge to the periphery and ghost craters to the South.
176 000 km2. 3.85 billion years old.

Langrenus (Top left) and Petavius (Bottom right)

The Petavius rille (or narrow valley) is easily visible from the mountains at the center of the crater, to the south rim. It said to have a dimension of 48Mi x 1.0Mi.

An smaller network of rilles is visible on the north west side of the crater.

On the cropped image below of the Petavius Crater, Petavius C (6.0Mi x 6.0Mi) and Petavius A (3.0Mi x 3.0 Mi) are highlighted. Petavius Rimae is 48Mi x 1Mi.

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