furgle
31-08-2018, 09:38 PM
From Ronald, Buta, (November 1990). "The ringed X-galaxy NGC 7020" (http://adsabs.harvard.edu/abs/1990NASCP3098..189B):
The southern galaxy NGC 7020 presents an unusual morphology: it includes a very regular outer ring which is completely detached and which envelops an inner ring/lens zone with a hexagon surrounding an X shape.
The outer ring has a high contrast compared to those usually observed in barred galaxies, yet NGC 7020 is not obviously barred.
Better resolution here (http://observatory.site/astrophotography/Ranged_Galaxy_NGC_7020/)
Image:
65x 360s luminance
23x 360s red
34x 360s green
38x 360s blue
Total integration 16 hours.
Hardware:
Celestron 11" EdgeHD
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik luminance, deep sky RGB filters
Starlight Xpress Lodestar X2 Autoguider
Starlight Xpress Active Optics
Innovations Foresight On Axis Guider
Starlight Instruments Focus Boss II
Location:
Orange zone in Brisbane, Australia. (Bortle 7)
Imaged over 5 nights. New Moon.
Software:
Planning & camera alignment with Aladin 10
Captured with TheSkyX Professional
Guiding with PHD2
FocusLock live focusing
PixInsight: Calibration, registration, integration, crop, dynamic background extraction, denoise, deconvolution, color calibratio, background neutralization, HDR multiscale transform, SCNR, histogram stretch, curves
The southern galaxy NGC 7020 presents an unusual morphology: it includes a very regular outer ring which is completely detached and which envelops an inner ring/lens zone with a hexagon surrounding an X shape.
The outer ring has a high contrast compared to those usually observed in barred galaxies, yet NGC 7020 is not obviously barred.
Better resolution here (http://observatory.site/astrophotography/Ranged_Galaxy_NGC_7020/)
Image:
65x 360s luminance
23x 360s red
34x 360s green
38x 360s blue
Total integration 16 hours.
Hardware:
Celestron 11" EdgeHD
Skywatcher EQ8 Pro mount
QSI 683-ws8 Camera @ -15°C
Astronomik luminance, deep sky RGB filters
Starlight Xpress Lodestar X2 Autoguider
Starlight Xpress Active Optics
Innovations Foresight On Axis Guider
Starlight Instruments Focus Boss II
Location:
Orange zone in Brisbane, Australia. (Bortle 7)
Imaged over 5 nights. New Moon.
Software:
Planning & camera alignment with Aladin 10
Captured with TheSkyX Professional
Guiding with PHD2
FocusLock live focusing
PixInsight: Calibration, registration, integration, crop, dynamic background extraction, denoise, deconvolution, color calibratio, background neutralization, HDR multiscale transform, SCNR, histogram stretch, curves