Parsamian 21 (Par 21, also referenced as Parsamyan 21), cometary reflection nebula in Aquila.
The nebula is associated with the bright star at its apex and is seen against a small dark cloud.
Taken Aug 19 through Aug 23, 2011. Imaged with CCD Labís Q285M camera and a Celestron
EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount. The final image was upsampled 1.3
times and cropped. All subframes were 10 minutes binned 1x1 resulting in the following
total exposures R:G:B (min) = 130 : 130 : 130. Captured with Nebulosity, calibrated, sigma
combined in Iris with other processing using PixInsight LE and Photoshop CS. North is up.