Visible LHaRGB
Near infrared LRGB
Click above for larger images
| Catalogue and alternative designations | NGC
253, Sculptor Galaxy, silver coin galaxy
|
| Type | Galaxy |
| Position | 00 47 33, -25 17 18 |
| Constellation | Sculptor |
| Camera and Telescope | STXL6303E and 36.8 cm Ritchey Chretien |
| Focal Ratio | F9 |
| Exposure Details | For the visible image, LHaRGB 150:80:120:150:120 with Astrodon series 2 filters. All unbinned. For the infrared image, LRGB 135:80:80:80. Luminance unbinned and colours binned 2x2. The infrared shot utilizes the fact that the sensitivity of the 6303 chip extends beyond 1 micron. Red is assigned to a band peaking at about 850 nm, Blue to 830 nm and blue to 750 nm. The luminance is "visible blocked" with zero response shorter than 700 nm. Special Astrodon filters (not sold anymore) were used. |
| Description | At magnitude 8 NGC 253 is one of the brightest galaxies in the sky and is quite large at 27.5 x 6.8'. It was discovered by Caroline Herschel in 1783. |