The first album cover below shows Neptune and its visible light spectrum on Sep 23 2014 at 1:36AM. The raw spectrum that I captured is shown as the thin color bar between the blue disc of Neptune and the red spectral curve.
In the spectral curve note that my data reveals the presence of ammonia, methane, and hydrogen in Neptune's atmosphere.
I have labeled the absorption lines for methane at 6190 Angstroms wavelength, ammonia at 5430 and 5754 Angstroms, and hydrogen at 4861 Angstroms. The rectangular color bar at the bottom of my image is Neptune's spectrum corresponding in scale to the spectral curve. Note the deep black absorption lines appearing in the green portion of the spectrum for ammonia and in the red portion for methane.
Neptune's apparent size was only 2.4 arc seconds; I captured the image of Neptune on Sept 14 2014 at 2:10 AM EDT with a C11 SCT, a 2x barlow, a 0.75x focal reducer and an ASI 120MC astronomy camera; I captured the image of the spectrum of Neptune on Sep 23 2014 at 1:36 AM EDT with the same equipment but without the 2x barlow.
Please click on any of the album cover images below to reach the entire collection of images for the planet or moon shown. For example clicking on the Jupiter album cover takes one to 3 separate collections of images captured between 2010 and 2014. Clicking on the 2012-2013 collection of images opens up every image I've taken of Jupiter between August 30 2012 and May 1 2013. Each of these images may be clicked on to reach a larger version of the image together with a more detailed description.
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