The Box, galaxy group Hickson 61 (HCG 61) in the constellation Coma Berenices.
The bluish spiral at the top is NGC 4173 and the edge-on galaxy next to it is NGC 4175. The smallest galaxy, at the bottom, is NGC 4174 and the last one (an elliptical) is NGC 4169. The bluish NGC 4173 is only about 50 million light years distant while the other three are at a distance of about 180 million light years, indicating that NGC 4169, 4174, and 4175 are likely to be physically related while NGC 4173 is definitely a foreground object.
This image taken in May, June 2019.
L-channel - 72 x 300 sec. bin 1x1;
R-channel - 12 x 600 sec. bin 1x1;
G-channel - 12 x 600 sec. bin 1x1;
B-channel - 12 x 600 sec. bin 1x1.
Total integration time - 12:00 hours.
Nice. Do you crop the field a lot with the corrector? I'm curious how much it corrects the field at the edges. I was thinking of getting one myself instead of the Meade. But with Starizona, only pre-orders are available for the 0.63x right now.
Thanks, Bogdan! My sensor diagonal is only 15mm, so the 0.75x reducer corrects this field perfectly. Moreover, backfocus error can be up to 3mm without degrading the corners. This image is almost a full frame (stacking artifacts cropped) and resized to about 85% of the original. I remember shooting with a Canon 1100D, and the field was also flat with round stars in the corners.
18 Sep, 2020
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