Tag: Pleiades

Chasing darkness in Switzerland 2021 – Flims Laax

I haven’t been able to photograph the stars for a very long time. I live in a valley where many rivers flow, which brings a lot of moisture into the air. This moisture condenses, which forms either fog or clouds. I was sick of this weather and decided to climb above the clouds and finally take some pictures. Like last year I chose Berghaus Nagens in Flims/Laax ski resort and combine this trip with a skiing vacation. So, how was it? Well, I have bad luck this year. I got only a single cloudless night out of five. Moreover, it was the last one. So, I was not able to photograph the whole night and around midnight I had to pack the gear.

There is a time wrap made by GoPro Hero 8 Black. A view to the south direction. Orion is rising, snowcats are preparing the slopes and the only light pollution comes from city Milan, which is 100 km away.

The primary target was a very difficult one – IC 2118 Witch Head Nebula. This reflection nebula is illuminated by the supergiant star Rigel (right leg of the Orion constellation). The dark skies are the essence and the Askar mini telescope did the job. However, I was surprised how terrible was the chromatic aberration. This can be partially corrected in postprocessing, but not fully. I think I will have to find a better scope.

LensAskar FMA180 F4.5
CameraCanon EOS 6Da
MountiOptron Skyguider Pro
Exposure35x180s, ISO 1600
Date2021-12-30

Before the Orion constellation rose up, I captured the M45 Pleiades. It’s an integration of 63 frames each 2 minutes long. Here, the dark skies reveal some dark nebulae in the visual surroundings of the star cluster. Again, I was quite disappointed by the chromatic aberration of the Askar telescope.

LensAskar FMA180 F4.5
CameraCanon EOS 6Da
MountiOptron Skyguider Pro
Exposure62x120s, ISO 1600
Date2021-12-30

M45 Pleiades

Messier 45, sometimes called Seven Sister, Pleiades or Subaru, is an open cluster located in constellation Taurus. The cluster contains many hot blue stars and it’s characterized by reflection nebulosity. The cluster is easily visible by naked eye and therefore it has been used in mythology of many cultures around the world.

The picture was created by stacking of 80 pictures with total integration time 4 hours. In order to capture the nebulosity properly, the light pollution should be minimal, which I manage to experience during our trip to Milos Island. Unfortunately, the mount was not cooperating and in declination axis occurred oscillations due to backlash. Therefore the stars are bit oval. Maybe it’s time to upgrade the mount and pick something backlash free. I would select something portable like Astrotrac 360 or Avalon Instruments M-Zero.

Technical details:

TelescopeNewton 150/600 mm
Aperture150 mm
Focal length660 mm
MountiOptron CEM25P
AutoguidingQHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
CameraZWO 071 Pro @-10C
CorrectorExplore Scientific HR coma corrector
FiltersAstronomik L-1 - UV IR Block Filter
Exposure60x180s, Gain 134, bin 1x1,
Date2018-09-15

 


M45 Pleiades

Probably the most famous open cluster, visible by naked eyes is called Pleiades, Subaru or Seven Sisters. Charles Messier cataloged this DSO under number 45 (M45). This cluster is located in constellation Taurus. It’s the closest cluster to the Solar system (430 light years), has 8 light year in diameter and it’s characterized by the nebulosity – reflective illumination of the space dust by the blue light of the hot, young stars. The brightest stars have names: Alcyone, Atlas, Electra, Maia, Merope, Taygeta, Pleione, Celaeno and Sterope.

M45 Pleiades