OriginStack sample session: Dumbbell Nebula (M27), planetary nebula - 42 raw Celestron Origin frames

42 raw Celestron Origin light frames of Dumbbell Nebula (M27) (planetary nebula), 10 s each, captured 2026-09-01, with the session's own dark, flat and bias frames and the capture app's info.json. A bright planetary nebula against a rich star field. Colour sensor (Origin178), 6-inch f/2.2 RASA, 3056×2048 Bayer FITS. Filter setting in the headers: Clear. The frames are the best of the session by quality score, one from each of 42 consecutive time bins. The observer's location, GPS, airmass, session id and camera serial number were removed from the headers and json files; pixel data is unchanged. Capture time and the target's coordinates were kept. Stack it with OriginStack: python originstack.py -d "07_planetary_nebula_M27_Dumbbell" -o stack.fits. With OriginStack 2.21: 40 of 42 frames accepted; median star width in the frames about 5.0 px. The file ending _expected_result.jpg is the preview that run produced. Zip: 358 MB, SHA-256 a3f27bae1342864317fda3566808670ff9d51c923821fcb7e1e9d07be46aea8a.