Celestial hemisphere:  Southern  ·  Constellation: Hydra (Hya)  ·  Contains:  M 83  ·  NGC 5236  ·  Southern Pinwheel Galaxy
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M83 Southern Pinwheel under Bortle-7 sky, Igor Chekalin
M83 Southern Pinwheel under Bortle-7 sky
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M83 Southern Pinwheel under Bortle-7 sky

Getting plate-solving status, please wait...
M83 Southern Pinwheel under Bortle-7 sky, Igor Chekalin
M83 Southern Pinwheel under Bortle-7 sky
Powered byPixInsight

M83 Southern Pinwheel under Bortle-7 sky

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Description

My efforts to accumulate photons under the Brisbane city sky. 8 nights in August 2021, 5 nights for RGB and 3 for H-alpha

NPZ TAK-250K (250mm 1:8.5 Klevtsov's System), plus dedicated 0.7x reducer/flattener Mk2, Canon EOS-Ra. This optics works perfect for ASP-C sized field, so I used 22x22 mm crops which is handy 4096х4096 pixels with this camera and still have good stars in corners.

5h 46m RGB via 1 min subs at ISO1250
5h 20m H-alpha (Antlia 3nm) via 5 min subs at ISO1250

Software: APT, PHD2, DSS, Iris, FITs Stacker, PS

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M83 Southern Pinwheel under Bortle-7 sky, Igor Chekalin