Contact information

Ursa Astronomical Association
Kopernikuksentie 1
00130 Helsinki

Ursa Astronomical Association

Exoplanet WASP-84 b - 17.3.2018 at 20.18 - 18.3.2018 at 00.40 Kirkkonummi, Komakallio Observation number 71751

Visibility Unclassified

Samuli Vuorinen, Kirkkonummen komeetta

I dedicated another evening to such a more scientific measurement instead of beautiful images. I tried to observe when the exoplanet WASP-84 b passes in front of its parent star, dimming the star by about one and a half percent.

Wise from the previous exoplanet observation, I focused the images a little this time and lengthened the lengths of the individual exposures to better get rid of the noise caused by atmospheric scintillation. Eventually, 380 measurement points were accumulated and I recovered the entire overflow before the clouds came.

In the figure, the gray dots are the actual measurements, the blue curve shows the averages of 5 measurements and the green curve is a model fitted to the data in AstroImageJ.

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Additional information
  • Observation target
    • Exoplanet
  • Designation
    • WASP-84 b
    • Luokittelematon
  • Constellation
    • Hydra
Technical information

TS Boren-Simon Powernewt 8 "f / 2.8, Atik 460EX, Astrodon L-filter. Exposures 380x30s.

Comments: 3 pcs
Rauno Päivinen - 19.3.2018 at 06.39 Report this

Hieno havainto, käyrä seuraa erittäin hyvin tuota mallia.

Janne Kari - 19.3.2018 at 07.54 Report this

Tarkasti menee malliin!

Lauri Kangas - 19.3.2018 at 10.20 Report this

Eihän tässä käyrä seuraa mallia, vaan malli menee tarkasti havaintoihin. Tässä on sovitettu malli mitattuun dataan, eli siis selvitetty esim. pimennyksen alku- ja loppuaika ja syvyys sen mukaan mitä havainnot kertovat.

Eri asia olisi piirtää ennustettujen parametrien mukainen käyrä tuohon havaintojen sekaan, se ei tyypillisesti näytä osuvan yhtä hyvin.

Niin ja tosi hieno havainto!

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