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NGC 5718 and IC 1042 (Vir)
Click on the image for a larger version
| Date/Site: |
8. May 2018. Remote observatory on the AAR club's site in Presberg |
Exposure/
Filter: |
R: 7 x 300 seconds,
G: 7 x 300 seconds,
B: 10 x 300 seconds,
L: 9 x 300 seconds (-20°C) |
| Camera: |
QSI 632 with Astronomik Type II-filters |
Optics/
Instrument: |
250mm f/4 Newton with Baader RCC1 on 10Micron GM1000 HPS |
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Guiding: Lodestar attached to a 61mm-finder,
focusing: Microtouch and FocusMax,
data acquired remotely using CCD-Commander and MaximDL 6,
processing: PixInsight 1.8 |
The interacting galaxies NGC 5718 and IC 1042 display wide tidal tails. In the background many tiny galaxies as well as two quasars can be seen.
This image as well as the one of NGC 5427 was inspired by the outstanding images made by Christian Dupriez. Christian uses far longer focal lengths than I do, and seeing often is much better at his location because of the near ocean.
In the early months of my remote observatory my frames were affected by extreme gradients and colour-spots mainly caused by several reflecting surfaces in the tube of my newtonian. Very good tips by Gordian Kley helped to remedy these issues.
Anyway they never disappeared totally. Only when I changed the camera in 2020 it was proved that the QSI and its filters were part of the problem.
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© Friedhelm Hübner, last revision: 03.12.2023