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Ursa Astronomical Association

Telescopic comet LONEOS - 25.3.2017 at 22.45 Helsinki, Maunula Observation number 62300

Visibility I / V

Jorma Ryske, Etelä-Suomen kosmol. seura

Comet 315P / 2013 V6 (LONEOS) is perhaps a bit dimmed compared to the picture I took a week ago. The coma is dense almost star-shaped and still shows a faint short tail of about 50 "in the direction of PA 210 °. At the bottom of the image are the galaxies NGC 3788 mag12.60 and NGC 3786 mag12.40.

According to the stars, in the stacked image, a faint streak of about 1 arc minute stands out from the comet to the left in the 10 o'clock direction. It is apparently an asteroid (34751) 2001 QO100, mag16.86.

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Additional information
  • Observation target
    • Comet
  • Name of the observation target
    • 315P/LONEOS
    • Erittäin heikosti näkyvä
  • Tail length
  • 50 arc seconds
  • Coma diameter
  • 15 kaarisekuntia
  • Weather
    • +1C
  • Title for the comet
    • Telescopic comet
Technical information

SW 200mm / F4, Atik314L +, MPCC, CLS filter, CEM60. FOV 38'x 28 '. Exposures 30x120s = 60min from March 25, 2017 9:45 PM EET. North at the top, east at the left.

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