Barnard 204 is a Dark Nebula appearing in the constellation Aries. It is 815 light years from our solar system.
Barnard 204 appears roughly 12.0 x 12.0 arcminutes in size, corresponding to a physical diameter of 9 light years.
（quote from SkySafari）
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| Date and Place | 2014-11-22 Daikura, Fukushima 2014-11-29 Ootawara, Tochigi |
| Scope | Takahashi Epsilon180ED |
| Mount | Celestron CGEM |
| Camera | Atik383L+ -25[deg-c] |
| Auto guiding | Off-axis Lodestar + GPUSB |
| Filter | Astrodon Tru-balance Gen.2 LRGB Filter 36[mm] Unmounted |
| Exposure | L : 35x 900[s] R : 8x 300[s], G : 8x 300[s], B : 8x 300[s] Total : 685[min] |
| Software | Astroart5 SP3 with SHS Version 4.0 beta 1 PHD Guiding 2.3.1 Sky Safari Pro 4.0.5 Stella Image 6 Photoshop |
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