Object Name : M13
Object Type : The Great Globular Cluster in Hercules
Location : But-gogae Yangdong-myeon Yangpyeong-gun Gyeonggi-do South.KOREA
Date : 2013.5.1 thursday
Media : A4 paper, HB pencil
Equipment : 12.5′ dobsonian, XW 14mm
Observing conditions : Clear sky
I could identify propeller in M13
Spent a hour to sketch, 24:00 ~ 01:00