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NGC 474 (Psc)
Click on the image for a larger version
| Date/Site: |
2., 11., 26. November, 20. and 21. December 2024, e-EyE |
Exposure/
Filter: |
R: 12 x 180 seconds,
G: 12 x 180 seconds,
B: 12 x 180 seconds,
L: 142 x 300 seconds (-5°C) |
Camera/
Optics/
Instrument: |
ASI 2600MM Pro with Astronomik Type 2c-filter on 400mm f/5 Newton with 2" TS Comacorrector on AP1200 GTO |
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Data acquired remotely using N.I.N.A.,
Off-Axis-Guiding with ASI120,
Focusing with Microtouch,
Calibration with MaximDL 6, processing in PixInsight 1.8 using BXT and GraXpert |
The galaxy-cluster around NGC 474 consist entirely of gravitationally disturbed members.
The starburst-galaxy NGC 470 orbits NGC 474 and thereby produces multiple shells and jets.
NGC 467 suffers the same fate: the lenticular galaxy-remnant PGC1249151 downright twirled the larger companion. Even PGC4755 seems to belong to this slow waltz and is virtually pulled apart.
NGC 474 et al. (Psc), 2011
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 [unfortunately no longer available].
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