Explore scientific coma corrector – Page 2

M61 Galaxy

April 14, 2019 JakubK

Galaxy

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Spring offers the best conditions for photographing/observing of the galaxies. This is caused by the fact that the constellations Virgo, Leo and Coma Berenices are visible and there are galaxies anywhere you look. This year, I already captured M58 M88 M89 M90 M91 Galaxies, but there are still some galaxies missing, in order to finish Messier catalogue. One of them was M61 (upper left corner). This spiral galaxy is located in constellation Virgo, it has about the same size as our home galaxy Milky Way and it is approximately 52 light-year away from Earth.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	630 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, Guidescope 30 mm
Camera	ZWO 071 Pro @-15°C
Corrector	Explore Scientific HR
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	74x180s, Gain 94, bin 1x1,
Date	2019-04-06

M88 M91 Galaxies

March 30, 2019 JakubK

Galaxy

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Avalon M-Zero DSO Explore scientific coma corrector Galaxies M88 M91 Messier88 Messier91 Newton 150/600 ZWO ASI071MC Pro

Messier 88 (right) and Messier 91 are the spiral galaxies located between constellations Coma Berenices and Virgo. Both belong to the Virgo Cluster of galaxies and both are approximately 60 light-years away from Earth. The small galaxy at the very left is called NGC 4571.

Technical data:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	630 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, Guidescope 30 mm
Camera	ZWO 071 Pro @-15°C
Corrector	Explore Scientific HR
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	47x300s, Gain 94, bin 1x1,
Date	2019-03-30

NGC 2237 Rosette Nebula

March 30, 2019 JakubK

H II nebula

1 Comment

Astronomik L-1 UV IR Block Filter Avalon M-Zero DSO Explore scientific coma corrector HII region Monoceros Nebula Newton 150/600 NGC2237 Rosette nebula ZWO ASI071MC Pro

Rosette Nebula is a giant cloud of hydrogen gas. The gas is ionized by the star cluster located in the middle and therefore emits the light. Circular shape and the color correspond to the name – the rose. The cluster in the middle can be observed even by using small telescope, but the nebulosity is very dim, therefore in order to see it, one would need perfectly dark sky and very large telescope with low magnification. It’s definitely easier to photograph the nebulosity. My previous photo was done through the narrow band filters, which suppress the light pollution and increases the contrast of the picture. Now I tried it with normal one shot color camera and I must conclude that it went quite well.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	630 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, Guidescope 30 mm
Camera	ZWO 071 Pro @-10°C
Corrector	Explore Scientific HR
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	16x300s, Gain 94, bin 1x1,
Date	2019-03-30

M93 Open Cluster

March 27, 2019 JakubK

Open cluster

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Avalon M-Zero Cluster DSO Explore scientific coma corrector Hutech IDAS LPS-D2 M93 Messier93 Newton 150/600 Open cluster ZWO ASI071MC Pro

Messier 93 is an open cluster located in constellation Puppis and it is about 3400 light-year away from Earth. The cluster is one of those deep space objects, which I cannot see from my home, therefore I had to pack the gear and enjoy starry night outside. Compared to my previous attempt, I took the laser collimator with me and waited sufficiently long the temper the telescope. Well I was surprised that the stars are slightly oval and there is blue halo on one side and red one on the other side of nearly each star. I was speculating if there is something wrong with the optics, but then I realized that this object has very low declination (it’s not far from horizon), therefore it’s exposed to atmosphere refraction/dispersion. This means that the light must pass through the thick layer of an air. In this case the atmosphere works as a lens and bends red and blue light differently. The effect is described here or here.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	630 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, Guidescope 30 mm
Camera	ZWO 071 Pro @-20°C
Corrector	Explore Scientific HR
Filters	Hutech IDAS LPS-D2
Exposure	30x60s, Gain 136, bin 1x1,
Date	2019-03-27

M76 Little Dumbbell Nebula

February 14, 2019 JakubK

Planetary nebula

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DSO Explore scientific coma corrector Gemini gf53 Hutech IDAS LPS-D2 Little Dumbbell Nebula M76 Messier76 Nebula Newton 254/1000 Perseus Planetary nebula ZWO ASI071MC Pro

Messier 76 is one out of four planetary nebulae in Messier catalogue. It is one of the dimmest objects in this catalogue. The nebula is located in constellation Perseus and it is 2500 light-years away from Earth. M76 was discovered by Pierre Méchain in 1780 and in the same year was catalogued by Charles Messier.

The picture is a stack of 58 pictures, each 180s, which means nearly 3 hours of the integration time. However, the conditions were far from optimal, because the Moon was in first quarter and illuminating the skies.

Telescope	Newton 254/1000 mm
Aperture	254 mm
Focal length	1000 mm
Mount	Gemini G53f
Autoguiding	ZWO 174MM, TS 60/240 mm
Camera	ZWO 071 Pro @-20°C
Corrector	Explore Scientific HR coma corrector
Filters	Hutech IDAS LPS-D2
Exposure	58x180s, Gain 94, bin 1x1,
Date	2019-02-14

M41 Open Cluster

February 12, 2019 JakubK

Open cluster

1 Comment

Avalon M-Zero Cluster DSO Explore scientific coma corrector Hutech IDAS LPS-D2 M41 Messier41 Newton 150/600 Open cluster Travel ZWO ASI071MC Pro

In order to complete the Messier Catalogue and capture all of its deep space objects, I have to pack the telescope, mount, camera, cables and batteries and set it up somewhere in the nature with better view. Most of the objects I am able to capture from home, but some of them have very low declination (not far above the horizon) and I cannot see them from my terrace, because there is a hill direction south.

Messier 41, open cluster in constellation Canis Major is one of them. So, I packed my car and went to collect some photons. At least I got the opportunity to test my new mount Avalon M-Zero, which replaced my previous portable mount iOptron CEM25P. The old portable mount was working well, but due to conventional equatorial design, one needs a counterweight, which was in this case 5 kg. This means 1/3 of the total weight. M-Zero is basically single fork mount, which utilizes the weight of the motors and housing as a counterweight. Moreover, M-Zero uses belts and pulleys, which means zero backlash. I can confirm – it works very well. I can save few kgs in my case during my next travel expedition.

The night was cold and since I don’t do the astrophotography in the nature frequently, I faced some issues. First, the portable telescope lost the collimation and I didn’t have the laser collimator with me. Second, I started to photograph before the telescope reached the thermal equilibrium, therefore there was a focus drift. This is definitely not my best picture, but I can at least check another Messier object from the list.

Technical details

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	630 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, Guidescope 30 mm
Camera	ZWO 071 Pro @-20°C
Corrector	Explore Scientific HR
Filters	Hutech IDAS LPS-D2
Exposure	39x60s, Gain 136, bin 1x1,
Date	2019-02-12

M37 Open Cluster

February 8, 2019 JakubK

Open cluster

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Auriga Cluster DSO Explore scientific coma corrector Gemini gf53 Hutech IDAS LPS-D2 M37 Messier37 Newton 254/1000 Open cluster ZWO ASI071MC Pro

Messier 37 is the largest and the brightest open cluster in constellation Auriga. Visually, it has two deep space neighboring open clusters M36 and M38. The cluster was discovered by Giovani Battista Hodierna in 1654 and catalogued by Charles Messier in 1764. The cluster contains a lot of red giant stars and it is approximately 4500 light-year away from Earth.

This is the second deep space object, which I captured in a single night. The clouds rolled in, therefore I was able to capture only 30 pictures, 60 second each.

Telescope	Newton 254/1000 mm
Aperture	254 mm
Focal length	1000 mm
Mount	Gemini G53f
Autoguiding	ZWO 174MM, TS 60/240 mm
Camera	ZWO 071 Pro @-20°C
Corrector	Explore Scientific HR coma corrector
Filters	Hutech IDAS LPS-D2
Exposure	30x60s, Gain 94, bin 1x1,
Date	2019-02-08

M36 Open Cluster

February 8, 2019 JakubK

Open cluster

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Auriga Cluster DSO Explore scientific coma corrector Gemini gf53 Hutech IDAS LPS-D2 M36 Messier36 Newton 254/1000 Open cluster ZWO ASI071MC Pro

Messier 36 is an open cluster located in constellation Auriga, not far from the bright star Capella. The cluster is approximately 4000 light-years from Earth and it has diameter 14 light-years. There are another two open clusters in the vicinity. Specifically it is M38 (north-west) and M37 (south-east).

The picture is a stack of 50 images, each has 60 s exposure time, which means less than hour of the integration time. Another Messier object was captures. I hope, I will finish the whole Messier catalogue this year.

Telescope	Newton 254/1000 mm
Aperture	254 mm
Focal length	1000 mm
Mount	Gemini G53f
Autoguiding	ZWO 174MM, TS 60/240 mm
Camera	ZWO 071 Pro @-20°C
Corrector	Explore Scientific HR coma corrector
Filters	Hutech IDAS LPS-D2
Exposure	50x60s, Gain 94, bin 1x1,
Date	2019-02-08

M46 M47 Open Clusters

January 30, 2019 JakubK

Open cluster

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Avalon M-Zero Cluster Clusters DSO Explore scientific coma corrector M46 M47 Messier46 Messier47 Newton 150/600 Open clusters Puppis ZWO ASI071MC Pro

Messier 46 (left) and Messier 47 are open clusters located in constellation Puppis. Visually, these clusters are quite close to each other and both fit in the field of view of my smallest telescope. Visual distance is not the real distance, because M46 in approximately 5000 light-years away and M47 is much closer, only 1600 light-years away.

M46 contains roughly 500 members and small planetary nebula called NGC2438 can be found there.

The picture is a stack of 22 pictures, 2 minutes exposure each, which means 44 minutes in total. Unfortunately, my telescope was not properly collimated, therefore the stars are elongated in the upper left corner. Well, I must say that this was the first and the last night in January without clouds, therefore I did not get the chance to recapture this deep space object.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	630 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, OAG
Camera	ZWO 071 Pro @-20°C
Corrector	Explore Scientific HR
Filters	Hutech IDAS LPS-D2
Exposure	22x120s, Gain 94, bin 1x1,
Date	2019-01-30

M79 Globular cluster

January 15, 2019 JakubK

Globular cluster

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Avalon M-Zero Cluster DSO Explore scientific coma corrector Globular cluster Hutech IDAS LPS-D2 M79 Messier79 ZWO ASI071MC Pro

Messier 79 is a globular cluster located in constellation Lepus. This cluster is particularly interesting, because it can be observed/photographed only in winter and there is no other globular cluster in that part of the sky. Most of the globular clusters are visible in summer, when the galactic center is shows its beauty. This means that most of the globular clusters are close to the galactic center, but M79 is actually at the edge of our galaxy. Diameter of our own Milky Way galaxy is approximately 100,000 light-years. M79 is roughly 60,000 light-years far from galactic center and 42,100 light years away from earth. The study conducted in 2003 revealed the concentration of the stars in constellation Canis Major, which is neighboring constellation to Lepus and it was assumed that there is a dwarf galaxy there. Latest studies disproved this theory and the star concentration is assumed to be caused just by the spiral arm of the Milky Way.

This deep space object is extremely difficult to capture due to its very low declination if observed from Central Europe. Moreover, also the optics was not cooperating this night. I must admit it’s the worst picture of a globular cluster I have ever made. But if I want to complete Messier catalogue this year, I have to publish it as it is. I hope I will get an opportunity to recapture M79 next year.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	570 mm
Mount	Avalon M-Zero
Autoguiding	ZWO 174MM, Guidescope 30 mm
Camera	ZWO 071 Pro @-15°C
Corrector	TS MaxField
Filters	Hutech IDAS LPS-D2
Exposure	22x60s, Gain 134, bin 1x1,
Date	2019-01-15

Chasing darkness in Schwarzwald

October 16, 2018 JakubK

Travel

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Black Forest Explore scientific coma corrector iOptron CEM25P Milky Way Newton 150/600 Olympus PEN-F Schwarzwald Star trails Travel ZWO ASI071MC Pro

My second expedition after the dark skies (this year) led us to Germany, specifically to Black Forest (Schwarzwald) in the state of Baden-Württemberg. We rented a small cabin for a weekend and I took the same equipment which I took to Milos, i.e. telescope newton 150/600 mm, mount iOptron CEM25P and ZWO 071 Pro camera.

As soon got dark, the Milky Way showed up. I measured SQM and it reached 21.1, which is not spectacular, but far better compared what I have at home.

The equipment was working perfectly, but the dew started to form on the secondary mirror, because the cabin is close to river Breg, which means a lot of humidity. I never had dew problems with Newtonian telescope up to now. Lessons learned – I need a dew shield. I managed to capture only M74 Galaxy and M78 Nebula.

Anyway, I also managed to capture wide angle photos with my Pen-F and Fish eye lens.

Here are the star trails – exposure 30x30s:

And here is the Milky Way – exposure 1x30s ISO 3200 f1.8:

M74 Phantom Galaxy

October 12, 2018 JakubK

Galaxy

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Black Forest DSO Explore scientific coma corrector Galaxy iOptron CEM25P M74 Messier74 Newton 150/600 Schwarzwald ZWO ASI071MC Pro

Messier 74, sometimes called Phantom Galaxy, is a galaxy located in the constellation Pisces. This galaxy has two prominent spiral arms and it is a typical example of a spiral galaxy. The distance of 35 million light-years from Earth has been estimated, therefore what we are looking at here is a 35 million year old picture.

The photo was taken in Schwarzwald under decent dark skies and it’s an integration of 45 photos, each 3 minutes exposure, i.e. more than 2 hours of exposure time in total.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 – UV IR Block Filter
Exposure	45x180s, Gain 94, bin 1×1,
Date	2018-10-12

NGC6871 Open Cluster

September 15, 2018 JakubK

Open cluster

1 Comment

Cluster Cygnus DSO Explore scientific coma corrector iOptron CEM25P Milky Way Milos Newton 150/600 NGC6871 Open cluster ZWO ASI071MC Pro

NGC6871 is an open cluster located in Cygnus, has less than 50 stars and it is 5135 light-years from Earth. Constellation Cygnus is visually located on the galactic disk of the Milky Way; therefore there are many stars in the background. Particularly interesting are the dark nebulae, surrounding the cluster.

Picture was taken under dark skies of Milos Island and in total, it’s an integration of on 63 minutes.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	21x180s, Gain 134, bin 1x1,
Date	2018-09-15

M70 Globular cluster

September 15, 2018 JakubK

Globular cluster

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Cluster DSO Explore scientific coma corrector Globular cluster iOptron CEM25P M70 Messier70 Milky Way Milos Newton 150/600 Sagittarius ZWO ASI071MC Pro

Messier70 is a globular cluster located in constellation Sagittarius. The cluster is at a distance approximately 29’300 light-years from the Solar System. Neighbor cluster M69 was captured during the same night.

M70 is the 15^th globular cluster captured by me on Milos Island – mission accomplished.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	37x60s, Gain 134, bin 1x1,
Date	2018-09-15

M69 Globular Cluster

September 15, 2018 JakubK

Globular cluster

2 Comments

Cluster DSO Explore scientific coma corrector Globular cluster iOptron CEM25P M69 Messier69 Milky Way Milos Newton 150/600 Sagittarius ZWO ASI071MC Pro

Messier69 is a globular cluster located in constellation Sagittarius. It is approximately 29’700 light-years away from Earth. Together with Messier70 are close to galactic center of Milky Way (distance between them is 1’800 light-years) and there were two last deep space objects captured on Milos Island. These two were the last missing Messier objects, which I wanted to capture and I was very happy that I managed.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	37x60s, Gain 134, bin 1x1,
Date	2018-09-15

M45 Pleiades

September 15, 2018 JakubK

Open cluster

1 Comment

DSO Explore scientific coma corrector iOptron CEM25P M45 Messier45 Milos Newton 150/600 Pleiades Seven sisters Subaru ZWO ASI071MC Pro

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

The picture was created by stacking 80 pictures with a total integration time of 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 the declination axis occurred oscillations due to backlash. Therefore the stars are a 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:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 – UV IR Block Filter
Exposure	60x180s, Gain 134, bin 1×1,
Date	2018-09-15

IC5146 Cocoon Nebula

September 13, 2018 JakubK

Dark Nebula H II nebula

1 Comment

Barnard 168 Barnard168 Cocoon Nebula Cygnus DSO Explore scientific coma corrector IC5146 iOptron CEM25P Milos Nebula Newton 150/600 ZWO ASI071MC Pro

IC5146, sometimes called Cocoon Nebula, is an emissive nebula located in constellation Cygnus. Central star in the nebula is responsible for the excitation of the surrounding hydrogen gas. On the picture is also captured dark nebula Barnard 168, which creates the strip and it looks like the Cocoon Nebula has a tail.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	43x300s, Gain 134, bin 1x1,
Date	2018-09-13

M23 Open Cluster

September 13, 2018 JakubK

Open cluster

2 Comments

Cluster DSO Explore scientific coma corrector iOptron CEM25P M23 Messier23 Milky Way Milos Newton 150/600 Open cluster ZWO ASI071MC Pro

Messier 23 is an open cluster located in constellation Sagittarius not far from the star Polis (µ Sgr). Visually it’s surrounded in rich star field, because in this direction are located star clouds of Milky Way. The cluster contains approximately 150 confirmed members and it’s about 2000 light-years away from the Solar System.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	23x120s, Gain 134, bin 1x1,
Date	2018-09-13

M20 Trifid Nebula M21 Open Cluster

September 13, 2018 JakubK

H II nebula Open cluster

2 Comments

DSO Explore scientific coma corrector iOptron CEM25P M20 M21 Messier20 Messier21 Milos Newton 150/600 Trifid nebula ZWO ASI071MC Pro

Messier 20 (called Trifid Nebula) has been captured by me already on Gavdos. This year I had a telescope with shorter focal length, therefore I managed to capture two objects of Messier’s catalogue on one shot. Specifically it’s mentioned Trifid Nebula and M21 Open Cluster (down left from the nebula). The nebula has been already described in my previous post and it’s located not far from M8 Lagoon nebula. The cluster M21 contains approximately 60 stars and it’s characterized by quite dense core, where the distance between neighboring stars is only one light-year.

The picture was taken under dark skies of Milos Island and it’s an integration of only 54 minutes of exposure time.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	18x180s, Gain 134, bin 1x1,
Date	2018-09-13

NGC6946 Fireworks Galaxy, NGC6939 Ghost Bush Cluster

September 10, 2018 JakubK

Galaxy

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Cepheus Cluster Cygnus DSO Explore scientific coma corrector Fireworks Galaxy Galaxy Ghost Bush Cluster iOptron CEM25P Milos Newton 150/600 NGC6939 NGC6946 Open cluster ZWO ASI071MC Pro

NGC 6946, sometimes called Fireworks Galaxy, is a beautiful spiral galaxy located between constellations Cepheus and Cygnus. It is approximately 22.5 million light-years away from Earth and it’s a part of Virgo Supercluster of galaxies. The name didn’t get from the shape, but due to frequent explosions of supernovae.

Next to the galaxy is located NGC6939 Ghost Bush Cluster, which is a part of our own Galaxy, therefore the distance from earth is “only” 4000 light-years.

The picture is the last one from the day. I slewed to target, switched on auto guiding and went to sleep. Therefore the picture is an integration of 73 photos, each 5 minutes long, i.e. 6 hours of total time. This is probably the picture with the longest integration time from Milos.

Technical details:

Telescope	Newton 150/600 mm
Aperture	150 mm
Focal length	660 mm
Mount	iOptron CEM25P
Autoguiding	QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM
Camera	ZWO 071 Pro @-10C
Corrector	Explore Scientific HR coma corrector
Filters	Astronomik L-1 - UV IR Block Filter
Exposure	73x300s, Gain 134, bin 1x1,
Date	2018-09-10

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