Abell 50

Abell 50—Planetary Nebula in Draco (NGC 6742, PK 78+18.1)
Abell 50—Planetary Nebula in Draco (NGC 6742, PK 78+18.1)

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Image Data

Telescope: 10″ Aries f/15 Maksutov-Cassegrain on Astro-Physics 900GTO German Equatorial
Accessories: Moravian G1-0300 as Off-Axis Guider, 0.67X Astro-Physics CCD Telecompressor
Focal Length and Resolution: 2692 mm, 0.52″/pixel
Instrument: QSI 532wsg at -20 deg. C
Exposures: R, G, B: 10x100s, Total 50 minutes
Filter(s): Astrodon Tru-Balance E-Series
Exposure Date: 10th June 2011
Seeing, FWHM: 1.5–2.0″
Processing Software: MaximDL, PixInsight, Photoshop
Image Acquisition Software: MaximDL, TheSky6, CCDAutoPilot, FocusMax, PinPoint

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Object Data

Constellation: Draco
Type: Planetary Nebula
Dimensions: 33″
Magnitude: 13.4 (V)

Processing Procedure

Automatic Background Extractor (twice, 10th order, substract) to flat field – no real flat frames were used;
Histogram Transform, A Trous Wavelets K-Sigma to remove background noise, Resample, A Trous Wavelets (+0.1 on 1st layer) to sharpen stars, Photoshop reduce noise (full strength, preserve 100% details) to remove background noise a little bit further. Note: 20.0m central star barely visible, very poor transparency, moonlight.



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