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Ursa Astronomical Association

Rocket-related clouds - 10.10.2022 at 05.55 - 10.10.2022 at 06.05 Orimattila, Artjärvi, Tähtikallio Observation number 109950

Visibility III / V

Veikko Mäkelä, Ursa (Helsinki)

I wanted to check whether Monday morning's rocket test would also be visible in the Tähtikallo all-sky camera.

Unfortunately, there was some thin cloud in the eastern direction, but the rocket cloud stands out for 10 minutes as a bluish-white glow right at the forest border. Because of the clouds, it is a bit difficult to distinguish when the rocket cloud appears and disappears.

More similar observations
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.

Technical information

Photo at 5:59; 5.55, 5.58, 6.00, 6.01, 6.02, 6.03 and 6.05
SBIG All-Sky 340; 46–48 s;
slight sharpening

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