Thread: The Dolphin
View Single Post
  #1  
Old 21-02-2021, 10:09 AM
DiscoDuck's Avatar
DiscoDuck (Paul)
Raider Nation

DiscoDuck is offline
 
Join Date: Apr 2014
Location: Adelaide
Posts: 694
The Dolphin

A shot of the Dolphin. A two panel mosaic as it is just a little too large to squeeze into my focal-reduced RC8's field of view

Not a patch on recent images of it on this forum. But I found it very faint. I don't think it is a good object to shoot from light polluted skies - Adelaide suburbs - even with narrowband I mean. In an RGB shot (included for fun below - which I used for star colours) it is all but invisible in 1 hour per colour channel.

The other little shot is an overstretched crop of the lower middle. This faint sphere is a planetary nebula separate from the main Wolf-Rayet structure. Apparently only discovered in the early 2000s. (PN G234.9-09.7)

Larger version is on Astrobin here. But it is still quite noisy, even with the ludicrous amount of data taken (70 hours shot at various opportunities over the last 3 months or so!). Shot with a ZWO 1600MM-C on an RC8 with Chroma 3nm (OIII) and 5nm (Ha) filters.

EDIT: Version linked to on Astrobin has a bit of a different colour balance following some feedback.
Attached Thumbnails
Click for full-size image (Dolphin IIS.jpg)
199.1 KB100 views
Click for full-size image (RGB IIS.jpg)
182.4 KB56 views
Click for full-size image (PN.jpg)
6.0 KB59 views

Last edited by DiscoDuck; 22-02-2021 at 12:48 PM.
Reply With Quote