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jshuder | all galleries >> Astrophotography >> Arp Peculiar Galaxies > NGC 6621 & NGC 6622 (Arp 081)
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NGC 6621 & NGC 6622 (Arp 081)

NGC 6621 (the larger galaxy) galaxy type Sb: pec and NGC 6622 galaxy type Sa in Draco. This pair is
cataloged in the Arp Atlas as Arp 81 in the class of “Spiral Galaxies with a Large High-Surface-
Brightness Companion”. Taken over several nights from June 24 to July 21, 2017. Imaged with
Starlight Xpress’ SX-825 camera and a Celestron EdgeHD 9.25 at f10, on a Losmandy G11/Gemini mount.
The L subframes were 12 minutes binned 1x1, while the RGB subframes were 4 minutes binned 2x2
resulting in the following total exposures L:R:G:B (min) = 444 : 64: 64: 64. Captured with
Nebulosity, calibrated and sigma combined in Iris with other processing using PixInsight LE and
Photoshop CS. North is up.

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