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Ursa Astronomical Association

Telescopic comet PANSTARRS - 12.5.2013 at 00.35 Imatra Observation number 14590

Visibility I / V

Rauno Päivinen, Etelä-Karjalan nova

Panstarrs, photographed at 12.5 at night, I was practicing taking a spectrum from a star and I had to try to see if the comet could still be seen from the light sky. The background sky measured with the SQM-L meter was 18.1. Still that seems to stand out, the brightness is probably something in the 8mag range at the moment. The dimmest stars in the picture are about 16 mag, or slightly dimmer.

Visually, the comet stood out from the background sky with a telescope just barely, as a small haze. The core and any kind of tail were no longer separated. (12mm eyepiece, 120/900 lens tube)

As a camera, I used an ASI120MM planetary camera, which is also surprisingly good for DS shooting.

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Additional information
  • Name of the observation target
    • C/2011 L4 (PANSTARRS)
  • Observation target
    • Comet
    • Erittäin heikosti näkyvä
  • Title for the comet
    • Telescopic comet
Technical information

Equinox 120ED 120/900 lens tube. ASI120MM MV planetary camera. 30s exposures 16pcs. Darkframet and bias framet (which apparently didn't quite work as expected when there were streaks) Stacked with DSS, post-processing in Photoshop. Described by Sharpcap. Visual observation: same tube, TeleVue Delos 12mm eyepiece.

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