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

Ursa Astronomical Association

Exoplanet TOI 1811.01 - 14.4.2021 at 23.44 - 15.4.2021 at 03.21 Janakkala, Tervakoski Observation number 98616

Visibility I / V

Petri Kuossari, Riihimäen tähtit. yhdistys

TOI 1811.01, part 2!

On April 14, twelve eVscoops headed for hot Jupiter found by TESS around a small star 418 light-years away.

We received three positive observations (including myself) and two partial observations.

Accurate Medium Transport Times of a few minutes were measured from the combined light curves and the appropriate model (details below). Depths and durations are also in line with expected values. So we got to confirm this item.

March 19 - Common light curve measurements

Average delivery time (minutes): 3.45 +/- 1.82

Duration (minutes): 128.29 +/- 10.95 (119.61 min. Exp.)

Depth: 2.26% +/- 0.30% (1.80% exp.)

Residual photometric scatter (standard deviation): 2.08%

April 14 - Common light curve measurements

Average delivery time compared to expected (minutes): -0.36 +/- 1.91

Duration (minutes): 107.11 +/- 4.86 (119.61 min)

Depth: 1.35% +/- 0.11% (1.80% exp.)

Residual photometric scatter (standard deviation): 1.30%

Timing Explanation

If you look at the previous observation on March 19, the preliminary results for March showed a delay of ~ 16 minutes. This turned out to be an error in the analysis - this was compared to an outdated forecast of medium transport time. Now that we’re using revised forecasts, our measurements are nicely consistent with them.

Tom Esposito (Lead Exoplanet Astronomer) and Arin Avsar (Exoplanet Astronomer) worked on this at the Seti Institute.



More similar observations
Additional information
  • Observation target
    • Exoplanet
  • Designation
    • TOI 1811.01
  • Constellation
    • Coma Berenices
Technical information

Observer`s name: Petri Kuossari Date: 2021 04 14-15 City: Janakkala, Tervakoski Finland 60.791885 N 24.630539 E eVscope ID: 257ksz Target: TOI 1811,01 Finland time UTC + 3 Start / end of the observation: 23:44 to 03.21 Finland time Dark frames 23: 36-23: 38 and 03: 24-26 Exposure time 3970 ms CAD 3970 Gain 25 RA 12h 35m 41s DEC +27 12 '52 "No wind -2 degrees Celsius

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