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CG4 (Pup)
Click on the image for a larger version
| Date/Site: |
March 16., 17. and 18., 2015, Astrofarm at the Hacienda los Andes, Chile |
Exposure/
Filter: |
R: 13 x 600 seconds
G: 15 x 600 seconds
B: 12 x 600 seconds (all -20°C) |
| Camera: |
FLI PL29050 with Astrodon II-filters |
Optics/
Instrument: |
Astro-Physics 305mm f/3.8 Riccardi-Honders on AP1200 GTO |
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Guiding: Lodestar attached to a 61mm-finder,
focusing: FLI Atlas and FocusMax,
image acquisition: MaximDL 5,
calibration: MaximDL, processing: PixInsight 1.8 |
Image acquisition was often plagued by thin clouds drifting through the field of view. Of the 55 frames I had to sort out 6 blue, 4 green and 5 red frames, ruined by haloes and softening.
In the left upper corner of the image some obscure lightsource left a mark I could not eliminate with my processing skills. I didn't want to "paint" either, so it stays there as a reminder to do it better next time.
The globule makes a lovely duo with the spiral galaxy ESO 257-19.
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© Friedhelm Hübner, last revision: 03.12.2023