February 7, 2017
The data for this image was gathered through Astronomik 6nm-wide narrowband filters focused on the emission lines of Hydrogen alpha (H-α) and OIII. The H-α filter may also pick up some NII emission at 658.4 nm. Two hours of data (8x900") were collected through each filter. The two data sets were combined with a synthetic green channel to create an RGB. The color of the image matches closely the cyan of the OIII emission, which predominates the data, but the image preserves also the H-α [+NII] emission, and particularly the jets coming from the central star. I have included the separate monochrome data from the two sets below. The nebula's central star is about magnitude 14.8.
This image was taken through the CFF 290 Classical Cassegrain at f/7.93, with the SXVF-H9 camera.
Here is a link to a Hubble image of the nebula.
Here is the OIII:
And here is an inverted and stretched OIII version showing the looping of the jets back around to form the taffy wrapper pulls, or, at least, that's what it looks like to me. An interesting paper discussing the nebula's structure is here: https://arxiv.org/ftp/arxiv/papers/1206/1206.1902.pdf.
January 28, 2017
January 16, 2017
I am just getting around to processing this 8 hours of luminance data from DSW in New Mexico. As you can see, the skies there are great and equipment superb. The telescope is a Tak FSQ 106. The 8300-chip camera leaves slight blooms on stars that mimic diffraction spikes, an aesthetically pleasing failure of the camera's anti-blooming gate.
This is a great part of the sky, and this image allows one to fall into it several hundred million light years. The big galaxies are about 35 million light years away (give or take 10 million). The smallest galaxies are hundreds of millions of light years distant. See if you can spot clumps of those little dust motes in the distant background.
January 3, 2017
November 1, 2016
October 25, 2016
This image is just 12x600" through the CFF290 Classical Cassegrain at f/7.93, with the SXVF-H9 camera.