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Ursa Astronomical Association
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Ursa Astronomical Association

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Only observations that have a description and at least one image attached.

NGC 7000

21.9.2021 at 21.37 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

Viime kauden HaLRGB-opettelu saa nyt jatkoa. Kuvan luminanssi ja punainen kanava on ehostettu kapeakaistaisella vetyalfa-datalla. Vähän tekisi mieli hypätä kokonaan kapeakaistakuvaukseen mutta siinähän on väärät värit ;) Lisätietoja:

NGC 6888

11.9.2021 at 22.10 - Oulu (IV)
Jaakko Asikainen, Oulun Arktos

After mostly repairing last season’s equipment breaks, it was nice to get back to the deep sky. Had to go back to manual focusing but it’s really easy (at least even when it’s not cold). I photographed Sickle Mist NGC 6888 to begin the season. After processing, I noticed a wonderfully colored star in the middle of the fog. It is the Wolf-Rayet star WR-136 ( which is 600 thousand times brighter than the sun, a star at the end of its life with a special spectrum.

Melotte 15

3.10.2020 at 21.55 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

Two good evenings were spent filming the heart area of the Heart Nebula. The first night I took a mere hydrogen narrowband and the second night I photographed luminance and colors. A total of 10.7 hours of usable images. Melotte 15 is an open constellation in the middle of Perseus Heart Nebula. The radiation of its young and bright supergiants illuminates the surrounding fog. The stars are about 1.5 million years old and some are about 50 times the size of the Sun. Learn more:

IC63 Kassiopeian haamu

13.9.2020 at 21.35 - Oulu (II)
Jaakko Asikainen, Oulun Arktos

The Ghost lurking in Gamma Cassiopeia is about 600 light-years away. Just 3-4 light-years away, the 19-fold mass of the Sun heats the hydrogen mist IC 63 to the familiar red glow. The dimmer and farther IC 59 is more reminiscent of blue reflective fog. I photographed the subject on two calm, moonless nights and the light accumulated for a total of 8.3 hours. Learn more:

Sh2-155 Luolasumu

10.9.2020 at 21.33 - Oulu (II)
Jaakko Asikainen, Oulun Arktos

IC 5070 Pelikaanisumu

31.8.2020 at 23.05 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

The second target of the season was the Pelican Nebula and the Herbig-Haro target HH 555 flowing in its deep veins. More information:


27.8.2020 at 22.30 - Oulu (I)
Jaakko Asikainen, Oulun Arktos

The season has started in Oulu! A new alley is the integration of narrowband data with LRGB description. This first image shows the Sharpless list sh2-188, the planetary nebula in Cassiopeia. The technology is hydrogen alpha filter data combined with luminance and the red channel of the RGB image in PixInsight. The Sharpless list will probably be described even more through this. More information: Larger image:

NGC 4395

30.3.2020 at 22.30 - Oulu (II)
Jaakko Asikainen, Oulun Arktos

Reasonably unknown for this galaxy in Hounds. I used three evenings for this and just over 10 hours of collected light, I think it was worth it. I came across someone over a 10 hour project through this. More information:

Binocular comet ATLAS

23.3.2020 at 01.21 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

After a long wait, the clouds dissipated at half past two in the morning and I finally found the Atlas of the Big Bear. I already shot the comet, which is already reasonably bright, for three hours in five-minute clips, culminating in the attached video.

NGC 4236

18.3.2020 at 20.23 - Oulu (II)
Jaakko Asikainen, Oulun Arktos

The spiral galaxy NGC 4236 (Caldwell 3) is found in the constellation of the Dragon as part of the M81 set. It is about 22x7 arc minutes in size and about 10 in magnitude.

NGC 5033

16.3.2020 at 20.55 - Oulu (I)
Jaakko Asikainen, Oulun Arktos

The good weather in March almost then made up for the otherwise miserable season. Here's a little harvest, first for NGC 5033 Hounds.


13.3.2020 at 21.32 - Oulu (IV)
Jaakko Asikainen, Oulun Arktos

I filmed a trip from the Windmill Galaxy two nights. 63 5-minute lights on the first night were not enough, but the total of 103 after the second night produced such a picture. The second image shows how the galaxy itself has 8 NGC-listed nebulae and next to it on the right are 2 NGC-listed galaxies. 7 PGC galaxies appear dimmer. "M101 has a rather large galaxy compared to the Milky Way , it is about 170 000 light-years thus about 2 times the Milky Way-sized in diameter and Instead M101:.. The exact mass is not known, according to some estimates, it is about 16 billion times the sun . Mass Thi...

Images: 2 pcs


3.3.2020 at 20.33 - 00.40 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

Galaxy spring continues with this M106 & guys image. The second largest galaxy in the picture is NGC 4217, a spiral galaxy on its side that is a potential partner for M106. "Messier 106 (also known as NGC 4258) is a spiral galaxy about 24 million light-years from Earth. It is located in the Dachshund constellation. "

Images: 2 pcs • Comments: 1 pcs


28.2.2020 at 21.41 - 03.04 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

The last picture of the week is the Cat's Eye Galaxy in Hounds. "Messier 94 (or NGC 4736) is a rod spiral galaxy about 16 million light-years from Earth. It is located in the constellation of Hounds. M94 has a liner-type core (liner = Low-ionization nuclear emission-line region). From the spectrum of the nucleus, it can be concluded that there is a weakly ionized gas. The M94 also has two tires, inner and outer. The inner is about 70 ″ in diameter, and the outer is about 600 ″. There is a strong formation of stars in the inner ring. "

NGC 4657 & NGC 4631

27.2.2020 at 00.36 - 03.42 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

The second picture of the week and perhaps the most successful is Valasgala and Lätkägala in Hounds. I used 10-minute exposures, which caused inconvenience with the fixed pattern noise due to the small number of images. More information:


25.2.2020 at 22.18 - 04.00 - Oulu (IV)
Jaakko Asikainen, Oulun Arktos

The first good week of the season started to pay off in the form of Owl Nebula. I tried to bring out the outer shell of the mist but the 15 minute luminances weren’t enough either. Learn more:


20.2.2020 at 00.20 - 03.50 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

This winter, for the first time, I got the observatory up and running. It has been convenient when the laptop and tube are pre-connected for each session. The stormy winds of February but disagreed and blew the entire structure with its pipes and pedestals. With a terrible mound, the stuff survived without damage, this image served as a functionality test. More information:


15.2.2020 at 20.00 - 20.56 - Pello (IV)
Jaakko Asikainen, Oulun Arktos

Orion is a rare treat for itself, it cannot be described from its own backyard due to the trees blocking the southern sky, and even now, when visiting home villages, Orion only rose to just over 20 degrees. I got a picture in less than an hour with my travel tube. Learn more:

NGC 1560

10.1.2020 at 16.53 - 06.17 - Oulu (I)
Jaakko Asikainen, Oulun Arktos

During the full moon, it is reportedly worth photographing 11 magnitudes of small galaxies. It was a bit challenging, but it worked despite the reflections of the moon. Such a rogue visible from the side can be found in the constellation of Giraffe, at a distance of 8-12 million light-years it is part of the IC342 / Maffei group. It has a size of 10x1.5 arc minutes. Learn more:

Noidanluutasumu ja Pickeringin Kolmio

29.10.2019 at 19.30 - 23.25 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

I described Harsosumu as I was training my new travel equipment. In addition to the witch haze, the picture featured a slightly dimmer Pickering Triangle. Learn more:

Search result contains observations from time period 1.1.2000 klo 00.00 - 23.5.2022 klo 23.47.