Finally the clouds weren’t in the way and I got some sort of documentary about an early fall comet. The image is panoramic, the landscape is a half-minute single exposure, and the sky is exposed for a minute and stacked with a Deepskystacker. With the help of The Sky Live map, the comet was found smoothly in the picture and something hazy can be seen in the tail on the top right. Unfortunately, the focus was not quite right.

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Gradually, a comet emerged from behind the trees to be observed.

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I woke up at seven in the morning and still had time to take a 35-minute series of pictures before the morning in Spain dawned. The treated image would appear to have structure, and especially the lower one treated with the Larson-Sekanina filter would show some sort of showers (both front and rear / sides). Edit: I even added an animation.

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21P is on the left side of the image, maybe easier to find in the bigger image: https://www.flickr.com/photos/jannefoo/29812391237/ The panoramic company now crashed into its own megalomania, more of them than that behind that link. In the second picture, a slightly tighter cropping.

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21P / Giacobini-Zinner photographed as dusk already begins to slightly disturb during hourly exposure. Photographed in the 387nm narrowband only. -CN showers are visible from the optocenter up and down. In Figure 1, the entire field is 47'x 38 ', 20x3min exposure. Figure 2: Crop and processing with CometCIEF ("Samarasinha, NH, Martin, MP, Larson, S. M, 2013. Cometary Coma Image Enhancement Facility, http://www.psi.edu/research/cometimen") Figure 3 added color gradients to the CometCIEF image to distinguish brightness variations.

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In the morning hours under the still sky it is good to describe. Only the pearl owl roared in the woods. In addition to the comet, the image also includes M35, NGC 2156, NGC 2157, NGC 2158, and IC 443. The stacked image was nowhere near as good as this single exposure.

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Contrary to predictions, it was clear at night in Spain and in the morning I even got to shoot a comet. 2 versions. The first is the average stack with the stars included. The second is the median stack, where I tried to fade the stars to make the tail stand out better.

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The unstable weather had messed up my comet photography plans but now it finally looked good and I decided to drive to Niemennokka. Giacobini-Zinner is slowly moving into the subject of the morning and I preyed it pretty low. Perhaps it partly explains the slightly strange tone of the subject in the images. The tail stem and direction can still be perceived. I was going to photograph some more open constellations after the comet but the upper clouds came down the road.

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Great bright night. Comet this time with a wider view ;-)

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Comet update from last night. Comfortably came into the picture in this single shot.

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The comet Giacobini-Zinner flies fluttered on the night of September 7, 2018, from which I made an animation. In a stacked image, light 22 x 2min = 44min.

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Pretty nice little comet for camera optics.

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The comet is starting to be at its brightest, so you had to shoot it again. Unfortunately, I only got 20 squares for the red channel and 12 squares for the green channel so it was a bit of a torso. Then I tried to get something out of the green channel. And yes, the rather long tail starts to be when you stretch. In the second picture, I tried to combine a comet stack and a star stack (with success?).

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Comet 21P/Giacobini-Zinner is now about 0,4 AU from earth and moving quite fast, about 5' per hour. During observation it was bit low on north-east sky at 25°-30° altitude affected heavily of Helsinki light pollution and some fog. Dust tail length is about 15' to PA 275°. Image 1 IDAS LPS (Visible light) filter tracking comet 20x45s bin 1x1 Image 2 Semrock CN 387nm/15nm filter tracking comet 20x3min=1h bin 2x2 Image 3 CN gas jets, image processing by CometCIEF and then color gradients with Photoshop. CometCIEF service "Samarasinha, N. H., Martin, M. P., Larson, S. M, 2013. Cometary Coma Image ...

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The comet appeared on my 10x50 binoculars as a small hazy spot. The comet's coma was rounder in shape, with a weak central clearing in the center. The tail was very faintly visible to the side eye. I did not make more specific brightness or other estimates because my binoculars may not have been the best possible instrument of observation for this comet, although it was detectable by them.

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Between the scientific observations of the second graph, a series of 21P comets click. A tail that easily extends beyond the image is easily distinguished in the median stack. In addition, the first image that can be used for astrometry if desired. Focus and collimation still require honing in the wake of summer. Looped video about the comet: https://www.youtube.com/watch?v=WzJbapEN4q0

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The comet was supposed to appear near Capella tonight. I tuned the surveillance camera to its most sensitive, but it wasn't found. Exposure was 1/5 s and the IR filter was turned off. The moon is clear from the sky at the bottom. Some stars of magnitude 8 stand out in the picture, so the comet is probably a little dimmer than predicted. In the second image, the brightness and contrast are adjusted. I finally went to watch without electronics with 20x80 binoculars and only an almost non-existent dim haze spot was visible. The third image is from the time of the binocular observation. Instea...

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The comet was easily locatable after all the clouds and gauze had passed it. Then the moon rose behind the clouds, but in between there was some time for observation. Figures 1 and 2 stacked on 10 x 4min images, another image a combination of targeted images. The last two images (not cropped) are single shots with a follow-up of about 4 min / image.

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Kimurant image processing task: Capella's brightness, lower crescent below, upper cloud in front and fog rising from the ground. Eventually, the publishable result was successful.

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After my trip, there was unfavorable shooting weather, and even the lunar phase soon began to bother me. So the filming of Giacobini-Zinner made him wait for the September side. Due to the lights, I had to move to a longer lawn due to the lights. I put the tracking stand on the lawn and started to light up, but without any problems I didn’t survive. Apparently the imaging equipment sank into the lawn and only a small portion of the screens were usable. Although the optics remained completely dry, the humidity was undoubtedly above the lake, as the light of the Capella seen in the picture sprea...

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