Antilhue - Chile
Antilhue - Chile
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| Designation | NGC 6357 and "Las cuatro Juanitas" |
| Constellation | Scorpius (Sco) |
| Description | A perfect line-up of four 7th magnitude stars point towards the heart of this faint emission nebula. It is a difficult visual object because of its very low surface brightness and large extension: about the size of two full moons. Just like neighbouring NGC 6334, it is heavily obscured by galactic dust: 10 magnitudes of extinction in the green and much more in the blue. The B&W version in narrowband H-Alpha light is here. |
| Exposure | HaRGB 180:36:30:48 min @ -18°C, 1x1 |
| Camera | SBIG ST-10XE selfguided, CFW-8, Custom Scientific 4.5 nm Ha + RGB filters |
| Optics | Astro-Physics Traveler AP105EDF with 0.75x focal reducer @ f/4.6 (483mm focal length) |
| Mount | Astro-Physics AP1200GTO German Equatorial Mount |
| Software | MaxIm DL/CCD, Sigma Beta 10, DeBloomer, Registar, Adobe Photoshop 6.0 |
| Location - Date - Time | San Esteban (Chile) - 22Jun2003 - 04:00 UTC |
| Conditions | Transparency 6, Seeing 6, Temperature +12°C |
