Move your mouse over the picture to see the names of the various features.
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Bullialdus is an isolated circular formation on the western side of the Mare Nubium. Its
central mountain has multiple peaks. It is 63 Km in diameter and somewhere between 1,000 and 3,200 million years old. Its
sides are steep, tormented and 3500 metres high. The minor craters, Bullialdus A and B are probably
of the same age, but the other craters labelled in my picture are dated at about 3,900
million years and have been flooded by lava from Mare Nubium. This must date the flooding event at
between 3,200 and 3,800 million years ago. The picture was taken using my LX200 with a X2 adaptor lens on 7th October 2004 at 04:05 UT when the Moon was 22.8 days old. |
| Date and Time | 7th October 2004 04:05 UT | Camera | ToUcam 740K | Telescope | LX200 | Capture | K3CCDTools. High gamma, 1/50", 40% gain, 311 frames | Processing | Registax. 137 frames stacked. Wavelet 1-3 = 10 Brightness -30 |
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