M13, Star Cluster

Globular Cluster M13 in Hercules

Messier Object 13 is a globular cluster in the Hercules constellation. It was discovered by Hallery in 1714. It is visible with the naked eye on the dark site. A diameter of M13 is about 23 arc second. It is most beautiful globular cluster in northern night sky, very popular object in Japan.

Imaging information

Optics: Takahashi Mewlon300, PentaxMS5 Mount

Camera: SBIG ST-2000XM, SBIG AO7, Astronomik Type2C LRGB Filter

Exposure: L=50minutes(5minx10), R=G=B=10minutes

Processing Software: Stellaimage5, PhotoshopCS

Location: Takarazuka City, Hyogo Prefecture, 2006

Gekkan-Tenmon magazine