exoclock

KELT-9b (LOW)

Discovered by: Gaudi et al. 2017

The Star
Simbad
GAIA
2MASS
HD 195689
DR2 2064327278651198336
J20312634+3956196
RA 20:31:26.3534 DEC +39:56:19.765
Parallax
4.863 mas
P.M. RA
16.728 mas/y
P.M. DEC
21.478 mas/y
MagV
7.56
MagR*
7.562
MagI*
7.49
MagJ
7.458
MagH
7.492
MagK
7.482
MagG
7.577
MagGBP
7.611
MagGRP
7.563
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2458955.970923 ± 5e-05 BJDTDB
Period
1.48111874 ± 1.4e-07 days

Transit Parameters
Gaudi et al. 2017
Rp/Rs
0.08228 ± 0.00043
a/Rs
3.2 +0.02 -0.02
i
86.79 +0.25 -0.25 deg
e
-
ω
- deg
DepthR*
8.28 mmag
Duration*
3.85 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Gaudi et al. 2017
Teff
10170.0 +450.0 -450.0 K
Log(g)
4.09 +0.01 -0.01 cm/s2
Fe/H
-0.03 +0.2 -0.2 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 49 (7)
O-C -0.008 ± 0.058 minutes
ExoClock Observations (Recent) 7 (7)
Space Observations (Recent) 40 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 2 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.080464 ± 5.5e-05

KELT-9b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
KELT-9b (LOW)
2022-08-27
Michael Irzyk
Melun
C14
H694 / I / 30.0
1.95 ± 1.73
KELT-9b (LOW)
2022-08-27
Lionel Rousselot
Private observatory Vierzon
Newton 250/1200
ZWO 1600 monochrome / R / 60.0
-0.21 ± 1.3
KELT-9b (LOW)
2022-08-24
Lorenzo Betti
Osservatorio Polifunzionale del Chianti
RC-80cm
Moravian G4 - KAF 09000 / R / 40.0
1.42 ± 0.43
KELT-9b (LOW)
2022-07-16
Alvaro Fornas Silva
Centro AstronĂ³mico Alto Turia (CAAT). MPC J57
Planewave CDK 17"
Sbig STXL 11002 / V / 60.0
-2.6 ± 1.01
KELT-9b (LOW)
2022-07-16
Fran Campos
Puig d'Agulles Observtory
RC14" on EQ8 German mount
SBIG ST-8XME / R / 20.0
-2.89 ± 1.3
KELT-9b (LOW)
2022-07-16
Enrique Arce
Vallbona Observatory
Newton 10" f4
ZWO ASI 294 MM PRO / Lum / 30.0
-12.25 ± 3.02
KELT-9b (LOW)
2022-07-13
Alvaro Fornas Silva
Centro AstronĂ³mico Alto Turia (CAAT). MPC J57
Planewave CDK 17"
Sbig STXL 11002 / V / 60.0
-0.1 ± 1.01

Space Observations

Planet
Observation Date
Mission O-C
minutes
KELT-9b (LOW)
2021-08-19
TESS-0.15 ± 0.24
KELT-9b (LOW)
2021-08-18
TESS-0.5 ± 0.26
KELT-9b (LOW)
2021-08-16
TESS0.15 ± 0.26
KELT-9b (LOW)
2021-08-15
TESS0.61 ± 0.23
KELT-9b (LOW)
2021-08-13
TESS-0.4 ± 0.23
KELT-9b (LOW)
2021-08-12
TESS0.03 ± 0.24
KELT-9b (LOW)
2021-08-10
TESS-0.41 ± 0.23
KELT-9b (LOW)
2021-08-09
TESS-0.29 ± 0.26
KELT-9b (LOW)
2021-08-07
TESS-0.05 ± 0.24
KELT-9b (LOW)
2021-08-04
TESS-0.26 ± 0.26
KELT-9b (LOW)
2021-08-03
TESS-0.07 ± 0.24
KELT-9b (LOW)
2021-08-01
TESS0.83 ± 0.23
KELT-9b (LOW)
2021-07-31
TESS0.07 ± 0.24
KELT-9b (LOW)
2021-07-29
TESS0.43 ± 0.26
KELT-9b (LOW)
2021-07-28
TESS0.04 ± 0.26
KELT-9b (LOW)
2021-07-27
TESS-0.08 ± 0.24
KELT-9b (LOW)
2021-07-25
TESS-0.4 ± 0.26
KELT-9b (LOW)
2019-09-07
TESS-0.55 ± 0.27
KELT-9b (LOW)
2019-09-05
TESS0.51 ± 0.24
KELT-9b (LOW)
2019-09-04
TESS0.38 ± 0.27
KELT-9b (LOW)
2019-09-02
TESS-0.18 ± 0.29
KELT-9b (LOW)
2019-09-01
TESS-0.27 ± 0.27
KELT-9b (LOW)
2019-08-30
TESS-0.16 ± 0.29
KELT-9b (LOW)
2019-08-23
TESS-0.08 ± 0.29
KELT-9b (LOW)
2019-08-22
TESS0.6 ± 0.26
KELT-9b (LOW)
2019-08-20
TESS-0.1 ± 0.26
KELT-9b (LOW)
2019-08-19
TESS-0.13 ± 0.32
KELT-9b (LOW)
2019-08-17
TESS0.68 ± 0.29
KELT-9b (LOW)
2019-08-16
TESS0.1 ± 0.29
KELT-9b (LOW)
2019-08-13
TESS-0.19 ± 0.24
KELT-9b (LOW)
2019-08-08
TESS0.1 ± 0.24
KELT-9b (LOW)
2019-08-07
TESS0.58 ± 0.26
KELT-9b (LOW)
2019-08-05
TESS-0.98 ± 0.3
KELT-9b (LOW)
2019-08-04
TESS0.33 ± 0.27
KELT-9b (LOW)
2019-08-02
TESS-0.0 ± 0.24
KELT-9b (LOW)
2019-07-30
TESS-0.41 ± 0.24
KELT-9b (LOW)
2019-07-24
TESS1.22 ± 0.29
KELT-9b (LOW)
2019-07-23
TESS-0.75 ± 0.3
KELT-9b (LOW)
2019-07-21
TESS-1.05 ± 0.27
KELT-9b (LOW)
2019-07-20
TESS0.44 ± 0.26

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2018-10-23 Mansfield et al. 2020 0.04 ± 0.23
2015-03-14 Gaudi et al. 2017 -0.09 ± 0.2
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