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New Discovery in Corona Borealis


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About this observation
Peter Goodhew FRAS
Time of observation
13/07/2020 - 11:07
Possible Planetary Nebula in Corone Borealis
Observing location
Fregenal de la Sierra, Spain
APM TMB 152 LZOS Refractors
10Micron GM2000 HPS mount
QSI6120wsg8 cameras
5nm Ha: 21x1800" bin 2x2 5nm Ha: 59x1800" bin 4x4 Blue: 20x300" bin 1x1 Green: 18x300" bin 1x1 Lum: 34x300" bin 1x1 OIII 3nm: 54

A joint discovery with expert galactic prospector Dana Patchick. This is the first ever image taken. It is believed to be a possible planetary nebula, but getting confirmation of this via spectroscopy is going to be challenging as it is so faint. Capturing this required almost 60 hours of data shot at bin 4x4. Processing was problematic in terms of separating the nebula from faint gradients. Luckily my two scopes are oriented 180 degrees from each other to avoid the cameras colliding during autofocus. This made it possible to detect the gradients by processing the data from each scope separately and then comparing the two images. Background subtraction was used to stretch the faint signal before re-adding the background.

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