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NGC 474 et al. (Psc)
Click on the image for a larger version
| Date/Site: |
October 2nd, 3rd and 22nd, 2011, AAR-observatory in Presberg |
Exposure/
Filter: |
LchiRGB: Lchi = L+R+G+B
L: 6 x 1200 seconds,
R: 9 x 1200 seconds, G: 10 x 1200 seconds, B: 11 x 1200 seconds (-15°C) |
| Camera: |
SBIG ST10XME, CFW9 with SBIG LRGB-filters, AO-8 |
Optics/
Instrument: |
10“ f8-Ritchey-Chrétien on AP1200 |
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Calibration and deblooming: MaximDL 5,
processing with PixInsight 1.7 |
The elliptical galaxies NGC 474 and 467 developed tidal tails and shells during close encounters and mergers with NGC 470 and PGC 4755.
The question was would there anything be visible ander our Presberg skies?
With 12 hours accumulated exposure time over three nights this became truely a long distance run. As the luminance frames for this set accounted only for two hours, the RGB-data were combined to a synthetic luminance set which then was combined with the original luminance frames.
Friend Stefan helped to master many otherwise unsurmountable hurdles in powerful PixInsight.
Unequaled inspiration was Mischa Schirmer's picture.
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© Friedhelm Hübner, last revision: 03.12.2023