exoclock

KELT-18b (LOW)

Discovered by: McLeod et al. 2017

The Star
Simbad
GAIA
2MASS
BD+60 1538
DR2 1612165353793791488
J14260576+5926393
RA 14:26:05.7574 DEC +59:26:39.288
Parallax
3.083 mas
P.M. RA
-19.45 mas/y
P.M. DEC
6.179 mas/y
MagV
10.16
MagR*
9.941
MagI*
9.695
MagJ
9.454
MagH
9.272
MagK
9.21
MagG
10.104
MagGBP
10.317
MagGRP
9.782
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2458676.84596 ± 0.00024 BJDTDB
Period
2.8716995 ± 1.2e-06 days

Transit Parameters
McLeod et al. 2017
Rp/Rs
0.0846 ± 0.0009
a/Rs
5.14 +0.04 -0.08
i
88.9 +0.8 -1.2 deg
e
-
ω
- deg
DepthR*
9.35 mmag
Duration*
4.65 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
McLeod et al. 2017
Teff
6670.0 +120.0 -120.0 K
Log(g)
4.06 +0.01 -0.01 cm/s2
Fe/H
0.09 +0.13 -0.13 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 5.0"
Total Observations (Recent) 31 (4)
O-C 1.13 ± 0.68 minutes
ExoClock Observations (Recent) 15 (4)
Space Observations (Recent) 5 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 11 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.08338 ± 0.00035

KELT-18b


ExoClock Observations

Planet
Observation Date
Observer
Observatory
Telescope
Camera / Filter / Exp [s]
O-C
minutes
KELT-18b (LOW)
2023-01-18
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 30.0
-1.06 ± 3.17
KELT-18b (LOW)
2022-06-06
Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0
3.35 ± 1.44
KELT-18b (LOW)
2022-06-06
David Quiles
David Quiles Obs.
Celeste EDGEHD 800
ASI 2600 MM / R / 60.0
1.33 ± 2.45
KELT-18b (LOW)
2022-05-14
Simon Dawes
William James II Observatory
Skywatcher MN190 2
ZWO ASI 1600MM-PRO USB 3.0 Mono Camera / Lum / 15.0
-1.41 ± 3.31
KELT-18b (LOW)
2021-07-07
Stephen M. Brincat
Flarestar Observatory - MPC Code:171
Meade SCT
Moravian G2-1600 / V / 120.0
7.3 ± 3.02
KELT-18b (LOW)
2021-07-07
Antonio Ferretti
Gruppo Astrofili Frentani - Anxanum Observatory
Meade LX200 ACF
FLI MicroLine 11002 / Lum / 30.0
7.3 ± 4.32
KELT-18b (LOW)
2021-05-22
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / gpr / 30.0
-3.08 ± 2.16
KELT-18b (LOW)
2021-04-29
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / gpr / 30.0
-3.95 ± 1.73
KELT-18b (LOW)
2021-04-09
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / gpr / 25.0
2.09 ± 1.87
KELT-18b (LOW)
2021-04-06
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 30.0
3.1 ± 1.73
KELT-18b (LOW)
2020-11-02
Martin Crow
Burnham Observatory
Celestron C9.25
SX694 mono / R / 30.0
4.64 ± 3.6
KELT-18b (LOW)
2020-07-13
Yves Jongen
Rasteau Observatory
Plane Wave CDK 17"
SBIG STXL 11002 / R / 120.0
3.46 ± 2.3
KELT-18b (LOW)
2020-07-13
Alessandro Nastasi
Galhassin Robotic Telescope 1 (GRT1)
Officina Stellare RiLa 400
FLI ProLine 16803 / R / 30.0
-1.0 ± 2.59
KELT-18b (LOW)
2020-07-13
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / R / 30.0
-2.44 ± 2.02
KELT-18b (LOW)
2020-06-20
Carmelo Falco
GALHassin Robotic Telescope 2 (GRT2)
Giacometti-Fogale RC16
Andor Apogee Aspen CG16M / R / 30.0
6.19 ± 1.87

Space Observations

Planet
Observation Date
Mission O-C
minutes
KELT-18b (LOW)
2020-04-13
TESS-1.47 ± 0.63
KELT-18b (LOW)
2020-04-10
TESS-0.55 ± 0.63
KELT-18b (LOW)
2020-04-07
TESS0.1 ± 0.76
KELT-18b (LOW)
2020-03-29
TESS0.04 ± 0.65
KELT-18b (LOW)
2020-03-23
TESS0.76 ± 0.76

Literature Mid-times

Planet
Observation Date
Reference O-C
minutes
2016-07-21 McLeod et al. 2017 3.67 ± 2.23
2016-07-18 McLeod et al. 2017 -1.37 ± 1.95
2016-06-20 McLeod et al. 2017 3.38 ± 2.9
2016-06-20 McLeod et al. 2017 2.8 ± 1.57
2016-06-20 McLeod et al. 2017 -1.81 ± 2.78
2016-06-05 McLeod et al. 2017 -0.23 ± 1.57
2016-05-31 McLeod et al. 2017 3.08 ± 2.4
2016-04-18 McLeod et al. 2017 1.78 ± 2.5
2016-04-15 McLeod et al. 2017 0.91 ± 1.57
2016-04-15 McLeod et al. 2017 -1.68 ± 1.23
2016-04-15 McLeod et al. 2017 -1.81 ± 1.18
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