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Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Binocular comet Wirtanen - 12.1.2019 at 22.15 Orimattila, Artjärvi, Tähtikallio Observation number 80351

Visibility III / V

Veikko Mäkelä, Ursa (Helsinki)

Tähtikallio's helpers try to make a visual observation of Wirtase, when in urban conditions they were able to see it first due to light pollution and cloudy weather.

With the 18x50 binoculars with the stabilizer, the comet was easier. It was not only in an easy location near the Muschida star at the "end" of the Big Bear, but also high in the sky. When the subject happened in the field of view, it stood out easily.

Brightness: 7.3 mag (out-out method)
DC: 3
Comma: 12 '

The findings are pretty much in line with those made in the world, except the coma was a bit smaller. It should have been swept in the field of view to detect the opaque outer edge.

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Additional information
  • Observation target
    • Comet
  • Name of the observation target
    • 46P/Wirtanen
    • Keskitaso
  • Brightness in magnitudes
    • 7,3
  • Coma diameter
  • 12 kaariminuuttia
  • Weather
    • Selkeä
  • Title for the comet
    • Binocular comet
Technical information

B18x50, active stabilizer, by hand

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