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Contact information

Taivaanvahti,
Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki
taivaanvahti(at)ursa.fi

Ursa Astronomical Association

Kiikarikomeetta Giacobini-Zinner - 3.9.2018 klo 23.43 Helsinki, Maunula Observation number 77387

Visibility III / V

Jorma Ryske, Etelä-Suomen kosmol. seura

Comet 21P/Giacobini-Zinner is now about 0,4 AU from earth and moving quite fast, about 5' per hour. During observation it was bit low on north-east sky at 25°-30° altitude affected heavily of Helsinki light pollution and some fog. Dust tail length is about 15' to PA 275°.

Image 1 IDAS LPS (Visible light) filter tracking comet 20x45s bin 1x1

Image 2 Semrock CN 387nm/15nm filter tracking comet 20x3min=1h bin 2x2

Image 3 CN gas jets, image processing by CometCIEF and then color gradients with Photoshop. CometCIEF service "Samarasinha, N. H., Martin, M. P., Larson, S. M, 2013. Cometary Coma Image Enhancement Facility, http://www.psi.edu/research/cometimen"

Image 4 GIF Animation of CN gas jets, 4x15 min stacked images


More similar observations
Additional information
  • Havainnon kohde
    • Komeetta
  • Kohteen nimi
    • 21P/Giacobini-Zinner
  • Pyrstön pituus
  • 15 kaariminuuttia
  • Sää
    • +11C, some fog, Moon phase 41% at 25° from comet
  • Komeetan otsikko
    • Kiikarikomeetta
Technical information

TS 305/1200mm Newton, TS2Korrr 0.75x F2.9, QSI690, filters IDAS LPS & Semrock 387/15nm, iOptron CEM60. FoV crop 37'x 29'. Exposure IDAS LPS 20x45s=30 min bin1x1 0,84"/px starting at 3.9.2018 20:43 UT tracking comet. Exposure Semrock 387nm/15nm 20x3min=60min bin2x2 1,68"/px, starting at 3.9.2018 21:10 UT, tracking comet. North up, east left.

Comments: 1 pcs
Rauno Päivinen - 11.9.2018 klo 07.59 Report this

Hieno havainto ja erittäin mielenkiintoinen tuo CN filtterin kuva!

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