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Lunar crater rays and Mare lavas

Last Saturday I spend the night with some fellow backyard-astronomers, observing a 15-day-old Moon. When the Moon is full (or almost full) you can observe the white crater rays very good. On the first of the images below you see the bright

crater ray systems around Copernicus and Kepler. Together with the Tycho ray system, these are my favourites.

During full Moon it is also possible to observe the different patches of Mare lavas. On the second image you see Mare Serenetatis. The centre of Mare Serenetatis consists of brighter Mare lava, surrounded by patches of darker material. Especially at the southern edge, where Mare Serenetatis and Mare Tranquillitatis meet, you can see the differences in the two types of Mare
lavas.

The third image is an overview image of the Moon as it was last Saturday (1st august 2004) around 11.00 UT.

All images where shot with the Nikon Coolpix 4500 and a 4-inch refractor (TAL 100RS). I used the Baader fringe-killer and the Baader UV/IR blocker. The third image was shot with a Vixen Lanthanum 25mm eyepiece (no zoom). The other two images where shot with a 20mm Vixen Lanthanum and 4x (Tycho) and 2x (Mare Serenetatis) optical zoom. All images are stacked out of 10 or more original images using Keiths image stacker. They where also processed with the same software. (Unsharp Masking, Denoise, Level/Histogram adjustment).

In time, I will publish a detailed observing report, in the Solar System section of my website. I will also add all the data about the images in the more report. I will keep you updated!

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Posted by Math on 08/05 at 02:01 AM
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