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Ursa Astronomical Association

Telescopic comet Borrelly - 25.1.2022 at 18.57 - 25.1.2022 at 19.18 Orimattila, Artjärvi, Viestikallio Observation number 104335

Visibility III / V

Jorma Ryske, Etelä-Suomen kosmol. seura

The comet 19P / Borrelly is visible right from the early evening in the southwestern sky, albeit at a rather low altitude of about 25 degrees. The comet has a magnitude of 9 categories, which is nice and bright to photograph and is also suitable for visual observers even with smaller telescopes.

Figure 1) An inverted image of a clear filter exposed for 9 minutes shows dull tails, one in the direction of PA 80 ° and the other apparently an ion tail in the direction of PA 70 ° with a length of about 18 minutes of arc, Koma about 6 'in diameter. Image field size 26'x 16 '.

Figure 2) The image of the R-filter exposed for 10 minutes shows a particle tail in the direction PA 80 °.

* edit * Figure 3) B-filter image added, exposure 10 minutes. PA 70 ° shows a thin opaque tail, i.e. it is an ionic tail because it is visible in the blue band but not in the red band.

To the right of the comet Koma is the galaxy PGC 4195 mag 15.44.

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Additional information
  • Observation target
    • Comet
  • Visibility of the comet
    • Telescopic comet
  • Name of the observation target
    • 19P/Borrelly
  • Brightness in magnitudes
    • 9
  • Tail length
  • 18 arc minutes
  • Coma diameter
  • 6 kaariminuuttia
  • Weather
    • -7C

Technical information

TS 305 / 1200mm Newton, TS KomakorrF4, QSI690, Baader Clear, Astrodon R, CEM60. FoV 26 'x 16'. Viestikallio remote Observatory. North up, east left.

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