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Ursa Astronomical Association
Kopernikuksentie 1
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Ursa Astronomical Association

2 observations and 1 comments in queue.

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

IC1396 Elefantinkärsä and Granaattitähti

14.9.2023 at 20.30 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

The season started nicely on a mild and lightless September evening. I targeted the Kepheus Elephant Nebula, which I photographed last in 2014. The cheap lens tube ED70 has changed to a William Optics astrograph, a hydrogen alpha filter has been added and I have gained more experience. More information:

Rocket-related clouds

23.3.2023 at 20.35 - Oulu (V)
Jaakko Asikainen, Oulun Arktos

The Swedish Space Corporation's probe rocket BROR was finally able to set off from Kiiruna, I was filming a light show at Oulu's Pyykösjärvi. The rocket rose to 100 kilometers, spreading colorful barium clouds for research purposes. Surprised at how fast the rocket rose (the first cloud appeared less than a minute after launch), I excitedly clicked the pictures. The plane going north conveniently hit a couple of pictures, but as a much nicer surprise, the northern lights themselves decided to take part in the show. Unbelievable luck, this was the last chance to launch the rocket and th...

Images: 7 pcs • Comments: 2 pcs

NGC 7000

23.12.2022 at 18.00 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

Viimeksi oli kirkasta joskus lokakuun alussa. Nyt kuitenkin aatonaatto ja aatto tarjosi lähes pilvetöntä keliä, mikäs siinä filmatessa glöginsiemailun ohella. Kuvasin Pohjois-Amerikka sumua, kun halusin nähdä millaista jälkeä tulee uudella astrograafilla ja vety-alfa-filtterillä yhdistettynä oikeisiin väreihin. Lisätietoja: Taustatietoa: Pohjois-Amerikka-sumun löysi William Herschel Englannin Sloughissa 24. lokakuuta 1786. Pohjois-Amerikka-sumu (NGC 7000 tai Caldwell 20) on emissiosumu, joka sijaitsee Joutsenen tähdistössä lähellä sen kirkkainta tähteä Denebiä....

IC 1318 Perhossumu

24.10.2022 at 20.30 - Oulu (IV)
Jaakko Asikainen, Oulun Arktos

The second image of the season was the emission nebula IC 1318 next to Gamma Cygni (Sadr), which looks like a butterfly from a distance. However, it should not be confused with Scorpio NGC 6302. Next to the nebula at 11 o'clock is the open star cluster NGC 6910, whose magnitude is dwarfed by all the Great Rift matter in its path. More information:

NGC 6960 Noidanluutasumu

4.10.2022 at 22.05 - Oulu (III)
Jaakko Asikainen, Oulun Arktos

It was nice to describe a long time ago, when the previous season went with bad weather and technical difficulties. The lens tube was repaired in Taiwan, now it seemed to produce better stars. So for three hours, I photographed the Witch's Broom Nebula part of the Joutsenen Harso nebula, which is an ancient remnant of the expanding blast wave of a supernova. More information:

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:

Search result contains observations from time period 1.1.2000 klo 00.00 - 29.9.2023 klo 19.48.