KODF, The Hubble Deep Field in a wider context


Kees Scherer


Esprit 100 refractor, QHY16200 CCD

When the Hubble “stared at nothing for 100 hrs†in 1995 it’s WFPC2 camera used 4 different filters. 30.3 hrs of the HDF image was made using the “Redâ€(606 nm peak) filter at f 12.9.

I wanted to see what can be done today with a small refractor using the QHY16200 CCD with f5.5 and 41 hrs integration time using a red filter. See that tiny red HDF field annotation in the middle? The 800% “Blow up†inverse image at top center shows all the detail that can be extracted and I can find about 30 galaxies versus the 3000 in the Hubble image.

As reference 2 of the brightest Galaxies are marked in both images. But the Knight Observatory Deep field (KODF) image shows many Galaxy clusters, the largest at the Middle right of the image. Only 3 Galaxies in that cluster have a PGC number and the “brightest” 2 are at 2.2 and 4.9 Billion Lightyears distance. (The faintest galaxy in this image that i can identify is PGC30844770 at 8.4 Billion Lightyears)

246×600 seconds

Image dates: 30/11- 1,12,13,16,17,18,20,21,22,23/12 2017.
Software: Sequence Generator Pro, AstroPixelProcessor, Pixinsight.

Original FDH (inset) image by NASA and STScl, rotation and size reduction by Kees Scherer.