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Type: SAB(r)bc, distance ~ 6.5Mpc/21MLy |
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300" |
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(c) 2025 All astro photo images are copyrighted. They may not be used or reproduced without explicit written permission from the authors
Cropped Center
(c) 2025 All astro photo images are copyrighted. They may not be used or reproduced without explicit written permission from the authors.
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About this Image / Über dieses Bild
| Camera: | Moravian C3-PRO-61000 Mono CMOS |
| Image Type, Orientation: | LRGB-Ha Composite, North is at 12:00 |
| Exposure time: | L: 57x300s, R: 36x300s, G: 31x300s, B: 32x300s, Ha: 26x900s (total 19:30h) |
| Exposure date: | May 29th... June 21st, 2025 |
| Location: | Capella Observatory South at Kiripotib Astro Farm, Namibia |
| Filter: | Astronomik Deep-Sky Deep-Sky RGB Filter plus 6nm Ha filter on Moravian EFW-3L-9-II External Filter Wheel |
| Instrument: | "Rhea", a PlaneWave DeltaRho 350, 1050mm focal length, 350mm aperture, f/3 on 10Micron GM2000 HPS II Combi |
| Photographer: | Rainer Raupach, Stefan Binnewies, Josef Pöpsel, Frank Sackenheim |
| Remarks: |
NGC 6744 is one of the largest galaxies in the southern sky in terms of area. Its extension reaches 20′ in north-south direction. It is classified as an SAB(r)bc spiral, which according to current knowledge corresponds to the galaxy type of our Milky Way. This is why NGC 6744 is also referred to as its twin. Bright red emission nebulae mark its spiral arms. In the northwest, a spiral arm crosses the irregular dwarf galaxy NGC 6744A. An image of the same galaxy but with 5x the focal length, done 20 years before with Ganymed, can be found here. |
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| Bemerkungen: |
NGC 6744 gehört zu
den flächenmäßig größten Galaxien am Südhimmel. Ihre Ausdehnung erreicht in
Nord-Süd-Richtung 20′. Sie wird als SAB(r)bc-Spirale klassifiziert, was nach
aktuellem Kenntnisstand dem Galaxientyp unserer Milchstraße entspricht.
Deshalb wird NGC 6744 auch als deren Zwilling bezeichnet. Helle rote
Emissionsnebel markieren ihre Spiralarme. Im Nordwesten kreuzt ein Spiralarm
die irreguläre Zwerggalaxie NGC 6744A. |
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