VDB152 and Surrounding Clouds

Max Wolf's assistant, August Kopff, photographically discovered the complex structure on October 21, 1908. To Wolf, it looked like a cave and he started calling it the Cave Nebula. Wolf also thought the nebula was an actual cave formation in the Milky Way stars. It was finally designated as vdB 152 and is still sometimes called Wolf's Cave. VdB 152 is a reflection nebula. My photo shows VDB152 and the surrounding clouds from a wide view. This photo is only composed of three channel: RGB colors, and the red cloud extends from the bottom left to the top right of the photo. The total exposure time is about 18 hours, each RGB channel is 6 hours. This photo was taken in June this year at my remote observatory in Zhangjiakou City, Hebei Province, China.

Image information: Jun 2023; Exposure time: 18 hours; Telescope: TEC140ED APO with 0.72x AP Reducer lens; Camera: ASI ZWO 6200 MM; Mount: Paramount MX mount.