Hickson 57, Copeland's Septet
March 7/8, 2016, Chiefland, FL.
TAK 250 CDK with f/7.3 focal reducer; fl = 1825 mm.
Cooled, modified Hutech Canon 6D, ISO 800, 0.74 "/pixel.
(the scope only covers an APS-C chip, so with the full size 6D
chip there is a lot of vignetting around the field edge. Flats fix this but increase the noise around the edges.)
AP 1100 Mount, 50mm f/5 Borg Guidescope, Lodestar and PHD2, dithering.
7.5 min subs x 22 = 165 min (6 of 28 rejected).
22 lites, 5 darks, 3 flats; captured in BackYard EOS and processed in Image Plus and Picture Window 7.
North is to the right. Below is a cropped view of just Copeland's Septet.
Center Crop of Copeland's Septet
Sky Tools Pro 3 Chart of Copeland's Septet
(rotated so north is right)
Stars and galaxies to m ~ 18
SDSS9 Image of Region (from Simbad)
(Rotated so North is right.)
Here is an Adam Block Image of Copeland's Septet
Anonymous Galaxy Cluster
There is a small galaxy cluster in the wide field photo, top.
It's location is marked here.
Clicking brings a blow up of this region, rotated with N up, and the corresponding SDSS9 image. This is
too faint to be an Abell Cluster. It is MAXBCG J174.55285+22.36098; see next page.
AP Home Kleinhans, 2016