To me, the moon appears bolder in the night sky during the winter months.

If you don't mind me saying so, try lowering the exposure a little, to preserve some details in the highlights, and run the image through a simple image editing program to sharpen it up a bit, and it will look even better than this. This is just 81K as posted, so expect great things with a tiny bit of processing on the original. That's all I do until I try the 4 raw image editing programs I downloaded. (too busy taking photos!)