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| Description: | This planetary nebula is very bright and
relatively small, measuring 42 arc-sec. in diameter. It has also been
called the Clown Face Nebula. The central star is magnitude 9. |
| Exposure Data: | 2/22/2003. RGB: 6x5m, 6x5m, 6x5m @ 1x1
binning. -20°C,
0.56 arc-sec./pixel. |
| Processing: | Acquired via Sequencer, reduced and aligned in
Mira, sub-frames and calibration frames combined in Sigma, RGB: 3x
CCDSharp, RGB combined 1.0:0.9:1.4 in Maxim, curves, levels, mild USM other processing in Photoshop. 10 darks, 20
bias and 10 flats per filter used in calibration, also combined in Sigma. |
| Optical System: | 14.5” Ritchey-Chretien truss prototype by
RCOS @ F/9, ST-8E USB NABG/CFW-8A
CCD camera, AO-7 auto-guided, Paramount ME mount. |
| Comments: | Seeing was 2.4 - 2.6 arc-sec. Deconvolved
to 1.7 arc-sec. |
