Celestial hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 106  ·  NGC 4258
Messier 106 / NGC 4258, Michael Hansen
Messier 106 / NGC 4258
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Messier 106 / NGC 4258

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Description

This picture is actually a testpicture, in order to learn how to use CCD AutoPilot and to take twilight flats. The picture has been taken under questionable conditions, with a good airmass (1.06), relatively bad seeing (5.7") and a low mean SQM value (17.91 mag / sq. arcsec). Reported seeing and transparence was low (7 and 6 of 8), where lower is better.

The picture has been reduced with bias, darks and flats in IRAF, colorconverted and RGB split in MaxIm DL, whereafter they have been combined using IRAF and RGB combined in DS9. No further processing has been made.

However, since I both learned a lot about CCDAutoPilot and how to make twilight flats with an amateur telescope, the session was a succes.

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Messier 106 / NGC 4258, Michael Hansen