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 “Red”(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. See that tiny red HDF field 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. But the Knight Observatoty Deep field (KODF) overview shows many Galaxy clusters, the largest at the Middle right of the image. Only 3 Galaxies in that cluster have a PGC number.
Image dates: 30/11- 1,12,13,16,17,18,20,21,22,23/12 2017.
Knight Observatory, Tomar, Portugal.
Original FDH image (inset) by NASA and STScl, rotation and size reduction by Kees Scherer.
https://en.wikipedia.org/wiki/Hubble_Deep_Field
Comments