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Ursa Astronomical Association

Rocket-related clouds - 29.3.2023 at 23.02 - 29.3.2023 at 23.05 Hyvinkää Observation number 113922

Visibility III / V

Senni Rytkönen, Turun Ursa

I knew how to wait for the rocket launch, so I headed to the balcony around 11 pm to see if I could see it. The sky was clear and the background sky was also nicely dark. I barely had time to open the balcony glass when I noticed a comet-like object traveling in a northeast-northwest direction (classic ysäri model) emerging from behind the trees, which I immediately recognized as the object I came to visit. I had just come from light to dark, so my twilight vision wasn't great, but I could still see my back in the sky, albeit low. I managed to take a photo as proof with my mobile phone and followed the journey of Soyuz 2 in the sky until it landed behind the trees and the ridge of the roof of the opposite house.

I waved goodbye to Venus and the moon, still shining in the sky, and contentedly went to sleep.

#raketti: Soyuz 2.1y
#satelliitti: Kosmos 2568

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Additional information
  • Havainto
    • Rocket-related clouds
  • Cloud coverage in the sky
    • Very small area
  • Rocket launch
    • Rocket contrails info

      The rocket contrails are colorful clouds that appear when the sun is below the horizon. The contrails can float so high in the atmosphere that the sun shines on them even if it is already completely dark on the ground. They stay visible noticeable quite long after the launch.

      The colors are created by the scattering of sunlight in the small ice crystals. In Finland, rocket phenomena from two different locations have mainly been observed. One of them is the missile launches from the submarines from the White Sea and the Arctic Ocean. They use solid fuel that creates colorful clouds.

      Another source of rocket phenomena is the Plesetsk Cosmodrome Area in Russia. There are a few launches from there every year. These fires usually use liquid fuels, making the clouds less spectacular.

      The visibility of the rocket launch is affected by the time at which the launch is made and where the winds blow. The best of all is around 3-5 o'clock Finnish time, when the cloud has time to spread out a bit and shine in the morning sun coming from the east when it is still dark or dark in Finland.

      During the first decade of the 2000s, rocket phenomena have been observed about twice per year in Finland. Since then, however, it has been quieter.

      Rocket contrails from Oulunsalo, Photo by Jarmo Moilanen.

    • Rocket phase visible in the sky info
Comments: 2 pcs
Matti Helin - 30.3.2023 at 14.10 Report this

Täsmäbongausta parhaimmillaan :)

Senni Rytkönen - 31.3.2023 at 09.45 Report this

Juu! Eipä montaa minuuttia parvekkeella tarttenut kuikuilla. Ilahduttava havainto ja sitten vaan lämpimään sänkyyn. Tehokasta!

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