Deep-sky

Although I am more interested in visual work, taking images of Solar system and deep-sky objects is good fun as well. For the deep-sky imaging InFINNity Deck is equipped with a ZWO ASI1600MM Cool camera and a ZWO Motorised Filter Wheel for 7 x 36 mm filters. The latter has been loaded with filters for Luminance, Red, Green, Blue, H-Alpha, O-III, and S-II.

M13 (Hercules globular cluster)

The first deep-sky attempt: Hercules globular cluster M13 with in the lower left corner NGC6207.
Figure 1: The first deep-sky attempt: Hercules globular cluster M13 with in the lower left corner NGC6207.
On 2 November 2018, with the assistance of Rob Musquetier and Caspar Tielemans, the first deep-sky object was imaged from InFINNity Deck. Using the SkyWatcher Esprit 150ED and a ZWO1600MM Cool camera pictures with 60 and 120 seconds were taken of M13 (see figure 1), better known as Hercules globular cluster. In the same frame galaxy NGC6207 is visible as are bright stars HIP 81848 and HIP 81673. The images were taken at around 9pm UTC with the cluster at approximately 15 degrees altitude, which is quite low for proper imaging, but setting up equipment and sequences and waiting for cloud cover to open made M13 drop lower than anticipated. Nevertheless I think we done rather well for a first attempt under challenging conditions.

Click here for the full image.

M27 (Dumbbell Nebula)

M27 (Dumbbell Nebula) and 14 Vul captured with the Esprit 150ED and ZWO ASI1600MM Cool.
Figure 2: M27 (Dumbbell Nebula) and 14 Vul captured with the Esprit 150ED and ZWO ASI1600MM Cool.
The first attempt to shoot a deep sky object in full colour was on 4 November 2018 with M27, better known as the Dumbbell Nebula, using the SkyWatcher Esprit 150ED APO and ZWO ASI1600MM Cool camera (see figure 2). On a single night a series of subs of 10 x 120 seconds in LRGB, Ha, O-III and S-II were shot (so a total of 2:20 hours exposure). The image is the result of RGB, Ha, O-III and S-II, luminance was not used. In the processing all components were given a weight factor 1. Finally the image was cropped to 66% and given additional 35% colour saturation and 15% contrast. The flats were not perfect as can be seen when opening the original image.
The brightest star (left side of the image) is 14 Vulpeculae in the constellation of Vulpecula.

Click here for the full image.

14 Vulpeculae: 10Micron GM3000 HPS tracking test

A 25% cropped region around 14 Vulpeculae of a 20 minutes unguided exposure.
Figure 3: A 25% cropped region around 14 Vulpeculae of a 20 minutes unguided exposure.
The 10Micron GM3000 HPS is said to be that accurate that guiding would not be necessary. Taking this at face value is easy enough, but I wanted to see proof of it. For this, after having made the exposures of M27, I decided to take another few frames of that same area, but now at increasingly long exposures. The longest of these was a single exposure of 20 minutes (indeed, 1200 seconds!). So no guiding was done other than having the mount following the skies based on the internal model. I think the image, which is a crop around 14 Vulpeculae, speaks for itself.

Click here for the full image.

M57 (ringnebula)

M57 (ringnebula) captured with the Esprit and ZWO ASI1600MM.
Figure 4: M57 (ringnebula) captured with the Esprit and ZWO ASI1600MM.
On 13 and 14 December 2018 data was collected from M57, better known as the ring nebula. With 10 subs of 120 seconds per colour data was acquired in L, R, G, B, H-Alpha and O-III. Apart from luminance, which was added at 70% level all channels were combined at 100%. Once combined 60% saturation and 15% contrast were added, while green was slightly reduced (-5%). Finally the image was cropped to 45%. In contrast to M27 the flats were now much better.

Click here for the full image.

If you have any questions and/or remarks please let me know.

InFINNity Deck Astrophotography
Solar system Deep Sky