Newest observations

Contact information

Skywarden,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

1 observations and 0 comments in queue.

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

NGC 7635

20.3.2022 at 00.00 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

The weekend was downright handsome, so I had to take advantage of it. NGC 7635 or bubble mist. For this, approx. 4h of footage was collected with 180s exposures with Ha, SII and OIII narrowband filters. In addition, I dug up material taken from the archives at the same time in 2020 and combined everything into a pile, there seems to be a total of about 14 hours of material in front. One evening went to reading the material. Pretty nice that bubble came out there.

Images: 3 pcs

M81

6.11.2020 at 00.00 - 00.00 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Galaxy photography again from the city center. This time, I set out to test what kind of trace would be obtained by replacing the RGB image with the R-channel Ha narrowband data, and the luminance to emphasize the same Ha data. Camera Gain high (200), and exposures short (luminance 5s, G and B 10s bin2x2) but Ha at longer 180s exposure. During the two nights, the material accumulated well, and the final image had to be assembled from about 600 luminances, 270 G and B images, and 70 Ha images. Seeing when there were enough pictures made the signal push through pretty well. Making the colors mak...

Images: 2 pcs • Comments: 1 pcs

Mars

8.9.2020 at 02.00 - 03.00 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

The weather happened again at night, and Mars was in an equally attractive position. If only Olympus Mons grabbed the lens ... and I guess it did! :-) Although Seeing was worse than the last shot, luckily there were a couple of successes. After stacking and finishing, that massive volcano then appeared (not now it jumped to the eye, but when it appeared, the joy was undeniably great!) I have to hope that the descriptive weather is still going on, that is now such a descriptive planet!

Images: 3 pcs • Comments: 2 pcs

Mars

28.8.2020 at 01.30 - 03.30 - Lahti (V)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Mars is now handsome and in the morning high in the sky. I took the first test pictures as early as midnight, and there is a huge difference in the quality of the picture when Mars gets there from the horizon well above 30 degrees. I took pictures both without a filter and with a UV / IR Cut filter, about all the time from midnight onwards, to videos that were about 3-4 minutes long. Shooting with that UV / IR Cut filter was pretty pointless, and without the filter, much more detail came out. The best pictures were, of course, the last ones. I stacked all the GIF shots 1:30 onwards, those few ...

Images: 3 pcs • Comments: 3 pcs

M31

16.8.2020 at 00.00 - 02.30 - Asikkala (V)
Jussi Saarivirta, Ursa (Etelä-Suomi)

The first early autumn shooting adventure with a new tripod. Of course, it didn't go just like in Strömsö, and the departure when it was delayed so I arrived almost in the dark, the north trend went badly and the improvised counterweight hurt, so the stand was not in balance and the guide could be completely forgotten. Well, this then pruned the subjects of the shot pretty effectively, mostly to a couple of options, and having never properly photographed Andromeda, I then decided to try what kind of light can get out of that galaxy with 5 sec exposures. And surprisingly pretty, you get it ...

Comments: 1 pcs

IC 1848

8.8.2020 at 00.00 - 00.00 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

IC 1848 or Soul Mist. After the summer break, it will finally be dark enough again for at least a couple of hours of the night to be able to take pictures that are already valid. I tested the new iExos-100 tripod I got, and it's a working game. The material is about 3.5h front 180s exposures with Ha, OIII and SII filters. Well, that stand seems to carry a 5kg load and the guide stays nicely with it.

Comments: 1 pcs

Clearly visible night shining clouds

17.7.2020 at 01.25 - Lahti (III)
Jussi Saarivirta, Ursa (Etelä-Suomi)

A beautiful lonely night cloud in the Lahti sky against the water tower! In the otherwise cloudless sky, a beautiful sight on the still illuminated water tower. Even the bright Capell wanted to penetrate according to the picture :)

Binocular comet NEOWISE

8.7.2020 at 01.37 - Lahti (II)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Comet C / 2020 F3 (NEOWISE) on a bright summer night seen through a telescope. Good to the naked eye that Capellan first discovered, after that the telescope got to do the rest of the work! Quite poor visibility, albeit somewhat when Photoshop adjusted the color levels of the image so the comet's tail was already somewhat highlighted. Expectations were not very high. After all, this had to be tried once the opportunity arose.

Images: 2 pcs • Comments: 2 pcs

Saturn

7.6.2020 at 03.09 - 03.09 - Lahti (III)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Saturn low on the horizon, about 7 degrees high. With the naked eye, after getting used to it for a while and looking aside, the object was also noticed with the naked eye. However, the Jupiter visible next door was particularly bright even against this bright morning sky. With these items of description no longer at these latitudes at this time of year right then not everything you need to try. The vibration of the atmosphere was considerable, but its shape was immediately distinguished, both from the image of the camera and through the eyepiece. I also took a picture with a mobile phone came...

Images: 2 pcs

NGC 7000

1.5.2020 at 00.00 - 00.00 - Lahti (V)
Jussi Saarivirta, Ursa (Etelä-Suomi)

North American fog photographed with narrowband filters, stained with the Hubble palette. The source material was a total of about 8h of exposures, now filmed over three evenings this week and at the end of last week (Ha, OIII and SII filters). Focusing and guingo were not quite in place this time, so the sharpness was a bit in the search, but overall still quite usable material. It seems to be the last shot of the season, now the nights are starting to light up so briskly and the clouds can bully them.

Images: 2 pcs • Comments: 1 pcs

IC 1396

27.2.2020 at 01.00 - 05.00 - Lahti (V)
Jussi Saarivirta, Ursa (Etelä-Suomi)

IC 1396, or elephant's snout, the result of two nights of filming. It is nice to shoot with narrowband filters, when it is possible to shoot from here even in the middle of light pollution. The recording material for this had been taken for a total of 9.5 hours, 140 H-alpha and 140 2-minute exposures taken with O-III filters. Stacked and combined with PixInsight. Last nights have been real passels for filming, I wish I could add more of these!

Images: 2 pcs • Comments: 2 pcs

Jones-Emberson 1

30.8.2019 at 00.00 - 00.00 - Lahti (III)
Jussi Saarivirta, Ursa (Etelä-Suomi)

A sample of three nights of exposure, a total of about 8 hours of exposure with 150s Ha + OIII filters. Pretty subject, but dim - in the reading I was able to adjust the contrast and brightness with a pretty hard hand so that the subject came out well enough. In the center of the fog is PN ARO 121, a bluish white dwarf.

Comments: 5 pcs

IC 1871

28.8.2019 at 23.10 - 00.30 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

This time, this subject was selected for the shooting session of the evening, not knowing how surprisingly beautiful the fog that happened to be. The source material was 12x 180s exposure with Ha and OIII filters. Another decent attempt to process images taken with narrowband filters, and I was quite happy with the result.

Comments: 1 pcs

IC 1805

15.8.2019 at 23.40 - 01.15 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Taken the night between Thursday and Friday. The sky is already starting to be dark enough to shoot, and this gem of the sky was found in the north / east sky, suitably holl. The image is thus taken with narrowband filters, and combined from Ha and OIII samples into an RGB image. The second image is also the black and white image of the Ha filter.

Images: 2 pcs

M81

17.11.2018 at 21.30 - 00.00 - Lahti (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

As the clouds receded over the weekend, there was a suitable distance and a suitable subject to photograph from the balcony. So in the picture M81, and the source material is 15s luminance and 20s 2x binning RGB exposures, about 75 luminances and about 70 each color. The subject was a bit weak in the individual images, but when stacked, the result was a positive surprise.

Comments: 1 pcs

NGC 6992

8.9.2018 at 23.00 - Orimattila, Artjärvi, Tähtikallio (IV)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Image captured at the DS meeting on Star Rock. By the second observation night, the clouds had already partially receded and visibility had to be tolerated. However, there was quite a bit of fog in the air, and during the night, even thin cloud gauze moved in the sky, and when the observations were stopped, the sky was already practically completely closed. The target was actually selected because of the circumstances, the goal was to get to describe the galaxies, but as the obscurity covered the targets, something else had to be invented. Perseverance, however, was rewarded, and even though t...

Images: 2 pcs

Starscape image

8.9.2018 at 22.30 - 02.00 - Tähtikallio, Artjärvi, Orimattila
Jussi Saarivirta, Ursa (Etelä-Suomi)

The image is just a screenshot of the video, watch the video : https://vimeo.com/289580431 Image captured during the DS meeting, for approximately the entire observation night. Taken with a meining camera on a tripod, facing the sky and giving back. The conditions of the evening are clear, there was enough fog and clouds, but fortunately not so bad that no observations could have been made.

NGC 925

18.8.2018 at 00.45 - 02.30 - Lahti (II)
Jussi Saarivirta, Ursa (Etelä-Suomi)

The harvest from last Saturday night was finally treated. A sequel to Friday’s balcony shots, again targeting NGC 925. This time I grabbed the images with LRGB filters and got even a little color in this shaky galaxy. The source images were about 150 10-second luminance exposures and 20 20-second 2x2 binning R, G, and B exposures. After a long break, I was able to dig up notes about image processing again, but I guess it would eventually come :)

Comments: 1 pcs

NGC 925

17.8.2018 at 01.25 - 02.25 - Lahti (II)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Another output from the night test session. NGC 925 was selected as a target due to its practical location. The galaxy of magnitude 10.69 was seen rather faintly, and again this time the length of the exposure was not celebrated. 75 stackable 9-second exposure luminance images were taken as an experiment. Again, there were challenges with the guide and trying it mainly messed up the pictures even further, and I qualified for a stack of even more foggy pictures. The galaxy stands out mainly as a bulge, somewhat separated by the arms of the galaxy. Short exposures do not obscure objects but catc...

Images: 2 pcs • Comments: 4 pcs

NGC 383

17.8.2018 at 00.00 - 01.00 - Lahti (I)
Jussi Saarivirta, Ursa (Etelä-Suomi)

Testing of a new camera and image processing for the autumn season. NGC 383 was selected as a suitable opaque subject to photograph from the balcony. The purpose was to test the camera settings as well as interplay with the C9.25 tube. Light pollution bothered me, and reflections from the city lights disturbed the guider. As a result, 110 short 7-second luminance images stacked and processed. Not particularly spectacular, but the galaxy with its friends still emerged in power well.

Images: 2 pcs • Comments: 1 pcs

Search result contains observations from time period 1.1.2000 klo 00.00 - 23.5.2022 klo 23.49.