Grus Quartet ZWO ASI 071

[benklerk]

First ever mosaic turned out ok. This mosaic is 2 panel. Had a few issues trying to blend the 2 panels together. I guess its easier on a monochrome camera to do mosaics?

The Grus Quartet (NGC 7552, NGC 7582, NGC 7590, and NGC 7599) are four large spiral galaxies, in the constellation Grus, that are physically very close together and strongly interacting. The high starburst activity of two of the members, NGC 7552 and NGC 7582, is also thought to arise from tidal galaxy-galaxy interactions and subsequent formation of a bar in the disk. Several tidal tails are visible extending from NGC 7582.

GSO 6" RC
ZWO ASI 071
HEQ5 PRO
27 x 5min

[RickS]

Nice work, Ben. Mosaics are hard, even with a mono camera.

[Placidus]

That worked out really well. Seamless mosaic, nice colours, great detail.

I suspect that the tidal tails (https://www.atnf.csiro.au/people/bkoribal/ngc7582/grus_hi.html) are really only visible at 21 cm with a radio telescope. We certainly can't see them in either your shot or in our 36 hr exposure with the 20".

Once again, great result.

Best,
Mike

[atalas]

Wonderful :thumbsup:

[Ryderscope]

That's an inspiring project Ben and a good result.

[Atmos]

It’s really nice Ben, no visible merger lines so the mosaicing you’ve done is excellent. Most of the mosaics I’ve done so far have been with DSLRs and I’ve found the most difficult thing is less than perfect calibration frames. Looking at it on my phone is looks like darks may not have been used, appears like Amp aglow on the bottom of the frame and there is some faint banding.

The end result looks seamless and very pleasing though :)

[benklerk]

Hi Colin

I do use darks, but I don't know how to remove sky gradients amp glow in pixinsight. If I look at each of my frames the amp glow is gone but when I combine them that is when amp glow returns.

Ben

[Shiraz]

very tidy result Ben :thumbsup: - nice to see a fifth big galaxy.

[rustigsmed]

nice widefield there - good work!