KELT-21

RA: 20h 19m 12.00s, DE: +32° 34' 51.76" (304.8000204067, 32.5810449993)

6/27/2025, 9:58 PM - 6/28/2025, 2:22 AM (UTC)

Data:
  • Observer: Giovanni Calapai
  • Created: 6/28/2025 10:13:17 AM
  • Station: Calapai Astronomical Observatory
    Lat: +38°, Long: +16°
  • Instrument: Celestron SCT 280/2800 Atik 314L+ red. 0,63x
  • Photometric band: R
  • Time standard: Gjd
  • Brightness in: Mag
Determined transits
  • 2460854.50576 (6/28/2025, 00:08)
    Planet designation: KELT-21 b
    HJDmid: 2460854.50854 +/- 0.00139
    Heliocentric correction: 0.00278
    Transit depth (Mag): 0.01056 +/- 0.00109
    Transit duration (Min): 238.35 +/- 4.64
    Standard deviation (mmag): 2.16
    Data quality index: 3
    Data density (data/min): 0.61
    Fitting algorithm: Original ETD
    Note: 
    Adopted limb darkening: 0.5 | EXP. 90s | binning 1+1 | defocus | FWHM 88.9 px (71 arc-sec/pixel) | weather: clear, moisture | bortle 5, encircling light pollution | Photometric aperture radii: 14-22-26 | Astronomik R filter | Transit conclusion disturbed by clouds and twilight
Actions:
Light curve
Neighborhood of the object, comparison and check stars
Chart - KELT-21, JD 2460854.41574
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