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Ursa Astronomical Association

Telescopic comet NEOWISE - 11.7.2020 at 00.55 Vesanto Observation number 91790

Visibility Unclassified

Esko Lyytinen, Ursa (Helsinki)

The attempt I made four nights earlier was unsuccessful (I didn’t get it), but now last night I succeeded with the same equipment and technology.

I didn’t see it with the 20x80 binoculars, but I got out in the picture with strong image processing. That is, I took a background reference image from the same or slightly next to it and used it as a flatten when stacking.

The first image shows both of the 30 light supports stacked 1/8 s ISO 100 stacked as negative for both the actual image and the reference image.

Telephoto lens 135 mm 1 / 3.5.

The image thus appears as two in the image, i.e. negative from the reference image. Since both have already moved on a fixed tripod, I made a separate one where the positive image is only ten. In the still image, I could not see even with the processing. In the picture, I estimate the tail to stand out from a distance of about 200 pixels. Based on the image size, focal length, and cell size, I calculated this corresponding to 0.52 degrees, i.e., about half a degree apart from the tail. The clouds that seemed strong, even in the picture, were really so weak that they could not be distinguished from the normal image at all. There may be an NLC cloud (?)

The sun was about 5 degrees below the horizon and the comet 15 degrees above.

Since I didn’t separate with my binoculars either, I put a comet visible on the telescope.

More similar observations
Additional information
  • Observation target
    • Comet
  • Name of the observation target
    • C/2020 F3 (NEOWISE)
    • Luokittelematon
  • Visibility of the comet
    • Telescopic comet
Comments: 2 pcs
Veikko Mäkelä - 12.7.2020 at 14.24 Report this

Hieno saavutus.  Vesanto on tällä hetkellä pohjoisin havainto.  Jyväskylän korkeudella nähty kiikarilla ja Helsingissa nipin napin paljain silmin.

Timo Kuhmonen - 12.7.2020 at 21.03 Report this

Hienoa että on Vesannolla joku muukin yrittänyt havaita :-) Itsekin muutamia päiviä sitten yritin löytää komeettaa, mutta ei tullut tuloksia. Muutamia kuvia on vielä katsomatta läpi...

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