Astrophotography from Los Llanos de Aridane - Pinwheel Galaxy M101

Date2017/03/31
LocationLa Palma / Spain
ObjectPinwheel Galaxy M101
CameraAtik383L+
Guidingyes, QHY5-II Mono via OAG
Telescope8" GSO Newtonian
Barlow lensnone
MountEQ6 Syntrek
Cooling-10┬░C
Luminance10x 600s, bin: 1x1
Red8x 150s, bin: 2x2
Green8x 150s, bin: 2x2
Blue8x 150s, bin: 2x2
Dark2x
Flat10x
Total exposure~2h40m
End of February 2014 I already recorded M101 from Boeblingen near Stuttgart. The total exposure time was about 6 hours (!). This time I did a 2h40m exposure from Los Llanos de Aridane on La Plama with exactly the same equipment. This is the result.

From my perspective the two pictures do not have a big difference despite the colour tone which of course depends on the post processing. However, it's interesting to compare the results with respect to their total exposure time: The image recorded from Boeblingen was exposed more than two times longer.


As a result of the long exposure time the stars are not as perfectly round as the ones with a shorter exposure time. Despite that I am happy to see what is still possible from a city like Boeblingen ­čÖé

Finally I combined both images to one final image by rotating one image until it matched exactly. Maybe I am wrong but I think in the end this combined image has a little more detail than each of the pictures alone.

A full resolution image is available here.

Astrophotography on La Palma - Taking a look at spiral galaxy "Messier 100"



Date2017/03/27
LocationLa Palma / Spain
ObjectMessier 100 (spiral galaxy)
CameraAtik383L+
Guidingyes, QHY5-II Mono via OAG
Telescope8" GSO Newtonian
Barlow lensnone
MountEQ6 Syntrek
Cooling-10┬░C
Luminance11x 600s, bin: 1x1
Red9x 150s, bin: 2x2
Green9x 150s, bin: 2x2
Blue9x 150s, bin: 2x2
Dark2x
Flat10x
Total exposure~2h57m
In a clear night I recorded this image of "Messier 100" - a spiral galaxy located within the southern part of constellation Coma Berenices - from Los Llanos de Aridane on La Palma. It is an LRGB composite consisting of 11 luminance frames a 600 seconds and 9 red, green and blue frames a 150 seconds respectively. The image is also available in full resolution. The seeing conditions tonight were perfect (seeing ~1.95") and there was no local wind. The annotated image shows a lot of other interesting objects like NGC4323, IC783, NGC4312 and NGC4328 beside M100. Some objects I was not able to assign, yet - those are marked with question marks and could be additional galaxies.