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The Hole in the Trees Skybox | all galleries >> Deep Sky >> Planetary Nebulae > Jones Emberson 1
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Jones Emberson 1

PK 164+31.1 in Lynx

This is a bicolor, with Ha mapped to red and OIII mapped to teal (hue 180), and Ha as luminance.

Optics/Mount: CPC1100 with f6.3 Celestron reducer on a Milburn Wedge. Dec antibacklash set to 27/27. PEC on.
Camera: SXVR-H694
Exposure: 16.7 hours total. 19x20 min Ha, 31x20 min OIII, both bin 1x1.
Filters: Astrodon 5nm Ha, 3nm OIII
Date: 10 nights from Nov 9-10, 2013 to March 3-4, 2014

Imaging automation and capture: Sequence Generator Pro

Guiding Hardware: ASI120MM, Celestron off axis guider. Guiding scale 0.72 arcsec/pixel. 1 second guide exposures.
Focusing: Rigel Systems GCUSB/nStep on stock C11 focuser
Guiding Software: PHD. Aggressiveness 80, Hysteresis 0, Minimum Move 0.9, Max RA 1000, Max Dec 600. Dec set to auto/resist switching. Dithering set to Extreme with Settle < 1.2.
Guiding performance: HFR of subs about 1.2 arc seconds, RMS in PHD about 0.5 arcsecs.
Light pollution: Bortle 8 (white zone, NELM about mag 4.5)
Image scale at capture: 0.6 arcsecs/pixel = f/5.7
Scale of presentation: 1.2 arcsecs/pixel
Processing: Darks, bias, and flats. Stacked with Deep Sky Stacker, post-processed with Photoshop CS2 and Fitswork (for gradient removal).

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Sakib 01-Apr-2014 12:53
Great job! This planetary nebula is home to my favourite planetary nebula central star, it's so blue!