exoclock

HAT-P-18b (LOW)

Discovered by: Hartman et al. 2011

The Star
Simbad
GAIA
2MASS		 HAT-P-18
DR2 1334573817793362560
J17052315+3300450
RA 17:05:23.1475 DEC +33:00:44.939
Parallax
6.167 mas		 P.M. RA
-14.073 mas/y		 P.M. DEC
-36.689 mas/y
MagV
12.759		 MagR
12.61		 MagI*
11.659		 MagJ
10.822		 MagH
10.34		 MagK
10.234
MagG
12.368		 MagGBP
12.939		 MagGRP
11.681
*Calculated from GAIA magnitudes.

Ephemeris - Verified True
Kokori et al. 2022
Mid-time
2457408.449133 ± 8.1e-05 BJDTDB
Period
5.50802941 ± 5.3e-07 days
Transit Parameters
Kirk et al. 2017
Rp/Rs
0.1356 ± 0.0028		 a/Rs
16.39 +0.24 -0.24
 i
88.53 +0.16 -0.16 deg
e
-		 ω
- deg
DepthR*
24.28 mmag		 Duration*
2.71 hours
*Calculated from the other parameters, using PyLightcurve.
**Adjusted based on the space observations.

Limb Darkening Parameters
Hartman et al. 2011
Teff
4803.0 +80.0 -80.0 K
 Log(g)
4.57 +0.04 -0.04 cm/s2
 Fe/H
0.1 +0.08 -0.08 dex
ExoClock Status
Observing Priority LOW
Minimum aperture 6.93"
Total Observations (Recent) 28 (5)
O-C -0.44 ± 0.51 minutes
ExoClock Observations (Recent) 12 (5)
Space Observations (Recent) 7 (0)
ETD Observations (Recent) 0 (0)
Literature Mid-times (Recent) 9 (0)
Kepler Rp/Rs -
TESS Rp/Rs 0.13617 ± 0.00078

HAT-P-18b


ExoClock Observations
Planet
Observation Date		 Observer
Observatory		 Telescope
Camera / Filter / Exp [s]		 O-C
minutes
HAT-P-18b (LOW)
2023-05-26		Bryan Martin
Tiger Butte Observatory Remote		AG Optical IDK
ZWO ASI 294 / Lum / 180.0		1.5 ± 1.58
HAT-P-18b (LOW)
2023-04-23		Darryl Madison
Ajijic Observatory		Celestron CPC 800 Edge HD
ZWO2400MC / Clear / 180.0		2.62 ± 2.16
HAT-P-18b (LOW)
2022-08-01		Anaël Wünsche
Observatoire des Baronnies Provençales		CDK Planewave 2
ZWO ASI6200 / Clear / 120.0		-2.55 ± 0.86
HAT-P-18b (LOW)
2022-07-21		Dim Stouraitis
Galilaios		SCT
SXVF-H9 Starlight-Xpress / R / 60.0		1.86 ± 1.73
HAT-P-18b (LOW)
2022-07-10		Martin Mifsud
Manikata Observatory		Meade OTA
SBig ST10XME / Lum / 120.0		-1.37 ± 3.6
HAT-P-18b (LOW)
2021-08-19		Tõnis Eenmäe
Tartu Observatory		Planewave CDK 12.5
Apogee Alta U42 / R / 90.0		-0.17 ± 1.44
HAT-P-18b (LOW)
2021-07-28		Nello Ruocco
Osservatorio Astronomico Nastro Verde di Sorrento MPC code C82		SC Meade LX200 GPS on equatorial fork
Sbig ST10XME / Clear / 200.0		0.15 ± 1.01
HAT-P-18b (LOW)
2021-05-18		Billy Edwards
McDonald Observatory		LCO Meade
SBIG STX6303 / rpr / 90.288		-0.6 ± 1.44
HAT-P-18b (LOW)
2019-02-23		Yves Jongen
Rasteau Observatory		Plane Wave CDK 17"
SBIG STXL 11002 / Clear / 120.0		-0.67 ± 1.87
HAT-P-18b (LOW)
2015-05-07		Marc Deldem
Les Barres Observatory		Celestron C8
SBIG ST8-XME / Clear / 180.0		-3.96 ± 1.15
HAT-P-18b (LOW)
2015-04-15		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / R / 300.0		-0.77 ± 2.16
HAT-P-18b (LOW)
2013-06-12		Ramon Naves
Montcabrer		Meade LX200 12" ACF
Sbig ST8xme / R / 120.0		3.38 ± 1.02

Space Observations
Planet
Observation Date		 Mission O-C
minutes
HAT-P-18b (LOW)
2020-07-02		TESS0.92 ± 0.79
HAT-P-18b (LOW)
2020-06-27		TESS-0.39 ± 0.86
HAT-P-18b (LOW)
2020-06-16		TESS-1.84 ± 0.95
HAT-P-18b (LOW)
2020-06-10		TESS-0.81 ± 0.72
HAT-P-18b (LOW)
2020-06-05		TESS-0.23 ± 0.75
HAT-P-18b (LOW)
2020-05-25		TESS-1.72 ± 0.78
HAT-P-18b (LOW)
2020-05-19		TESS-0.84 ± 0.88

Literature Mid-times
Planet
Observation Date		 Reference O-C
minutes
2017-05-30 Wang et al. 2021 0.89 ± 3.02
2016-05-15 Wang et al. 2021 -0.52 ± 0.78
2016-04-29 Kirk et al. 2017 0.2 ± 0.09
2016-04-29 Kirk et al. 2017 -0.98 ± 0.28
2013-04-28 Seeliger et al. 2015 0.82 ± 1.21
2012-05-05 Seeliger et al. 2015 -1.64 ± 1.21
2011-05-24 Seeliger et al. 2015 2.67 ± 1.15
2011-04-21 Seeliger et al. 2015 -0.29 ± 1.79
2008-09-05 Hartman et al. 2011 -0.36 ± 0.29
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