Posted 25 November 2009 - 02:33 PM
Posted 25 November 2009 - 03:34 PM
I like this one very much. You made this sketch at a fairly high sun position. That makes it more challenging in my estimation.
Posted 25 November 2009 - 04:29 PM
An excellent observation of Purbach. The walls and flooded craters over the floor are well recorded. Thank you for sharing it with us all.
Posted 25 November 2009 - 07:06 PM
Posted 26 November 2009 - 08:04 AM
Nice work on this sketch--you captured the details well. Your drawing made me do a little research on Purbach (as these drawings usually do when I'm not familiar with them or their eponym.
Georg von Purbach was a 15th century Austrian mathematician and astronomer who taught at the University of Vienna. Among other works was a well received table of lunar eclipses. Interestingly, one of his pupils was Regiomontanus, whose crater joins Crater Purbach to the south where they share a battered rim. Mouse over this image to see the pair and here is a closeup. Crater Purbach is big--118km/71 miles in diameter.
Nicely done!!! You've almost convinced me to try a sketch of a crater . . . almost.
Jay, I agree that lunar sketching is daunting but I hope you'll try it when you're ready. You might be surprised by the results.
Posted 26 November 2009 - 01:40 PM