Here is a little cosmic Halloween treat for everyone. The ghost nebula in Cepheus, spans 2 light years across, and is well known for its eerie appearance. In this view, you are looking at 14 hours of total exposure time. It is extremely faint, particularly the outer brown nebulosity. Captured in mid-July under very good to excellent seeing conditions.
SH-136 - Ghost nebula in Cepheus
Imaging telescope: AT12 RC astrograph @ f/8 Imaging camera: QHY9M CCD Filters: Orion 2'' LRGB Mount: AP900 GTO Guider: Meade DSI Pro II, Robofocus Software: CCD Commander, Maxim DL, Photoshop CC 2014, Pixinsight 1.8
Date: L: 7/18,19 2017 RGB: 7/19,20 , 2017 Exposure: L: 33x900'' bin1, RGB: 12X600'' each bin1 Total integration 14.2 hours
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