Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Telescopic comet Iwamoto - 21.2.2019 at 20.47 - 21.2.2019 at 22.44 Kirkkonummi, Komakallio Observation number 81541

Visibility II / V

Samuli Vuorinen, Kirkkonummen komeetta

I photographed the Iwamoto comet again a couple of weeks back. The comet had clearly dimmed since the previous sighting . The stacked images still show a dim tail, but the individual images no longer contain any information about it.

The main image of the observation is the median stack of images taken in a couple of hours. Because the comet moves relative to the stars and the images are aligned according to the comet, the median stack removes the stars from the image moderately efficiently. The following image is an average stack of the same still images. The third image is a single minute-long exposure of a comet.

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Additional information
  • Observation target
    • Comet
  • Name of the observation target
    • C/2018 Y1 (Iwamoto)
    • Heikosti näkyvä
  • Title for the comet
    • Telescopic comet
Technical information

Atik 460EX, TS Boren-Simon Powernewt 8 "f / 2.8, Astrodon L-filter, exposure 86 x 60 s. Comet excitation of PHD2 has been used for monitoring.

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