Celestial hemisphere:  Northern  ·  Constellation: Aries (Ari)  ·  Contains:  NGC 770  ·  NGC 772
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NGC 772 - Arp 78, Michael Lorenz
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NGC 772 - Arp 78

Getting plate-solving status, please wait...
NGC 772 - Arp 78, Michael Lorenz
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NGC 772 - Arp 78

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Description

NGC 772 or Arp 78, an object I shortly paid a visit last year.

Now with the Atik 460 mono I was hoping to get a much better version. I planed to expose for two nights (~10h at least) to get descently deep. However, I had some major technical difficulties with my set-up on the first night. The second night was plagued with wind the first hours, so some exposures turned out with absurdly high FWHM. In the end I got 26x300s for lum bin 1x1, R: 4x180s, G: 12x180s, B: 8x180s. Color was binned 2x2. The result is quite adequat considering the conditions, but not what I was aiming for. But I guess one has to keep going despite some frustating moments :-).

No flattner used.

Version B: Lum only processing: drizzle, decon and 50% resize after processing. Some details emanating from the spirals arm.

Some information on the galaxy itself: Being in the Arp atlas catalogue number 78 it is an interacting galaxy with NGC 770. The angular dimensions are 7,3'x4,3' which equals to a massive 240.000 x 144.000 light years considering the distance of 115Mly. The fainter filament just visible in the b/w picture has a distance from the core of about 220.000ly.

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NGC 772 - Arp 78, Michael Lorenz

In these public groups

Arp's Peculiar Galaxies
Cloudy Nights